1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Procedures for interfacing to Open Firmware.
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
14 /* we cannot use FORTIFY as it brings in new symbols */
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/threads.h>
22 #include <linux/spinlock.h>
23 #include <linux/types.h>
24 #include <linux/pci.h>
25 #include <linux/proc_fs.h>
26 #include <linux/delay.h>
27 #include <linux/initrd.h>
28 #include <linux/bitops.h>
29 #include <linux/pgtable.h>
30 #include <linux/printk.h>
34 #include <asm/processor.h>
35 #include <asm/interrupt.h>
40 #include <asm/iommu.h>
41 #include <asm/btext.h>
42 #include <asm/sections.h>
43 #include <asm/machdep.h>
44 #include <asm/asm-prototypes.h>
45 #include <asm/ultravisor-api.h>
47 #include <linux/linux_logo.h>
49 /* All of prom_init bss lives here */
50 #define __prombss __section(".bss.prominit")
53 * Eventually bump that one up
55 #define DEVTREE_CHUNK_SIZE 0x100000
58 * This is the size of the local memory reserve map that gets copied
59 * into the boot params passed to the kernel. That size is totally
60 * flexible as the kernel just reads the list until it encounters an
61 * entry with size 0, so it can be changed without breaking binary
64 #define MEM_RESERVE_MAP_SIZE 8
67 * prom_init() is called very early on, before the kernel text
68 * and data have been mapped to KERNELBASE. At this point the code
69 * is running at whatever address it has been loaded at.
70 * On ppc32 we compile with -mrelocatable, which means that references
71 * to extern and static variables get relocated automatically.
72 * ppc64 objects are always relocatable, we just need to relocate the
75 * Because OF may have mapped I/O devices into the area starting at
76 * KERNELBASE, particularly on CHRP machines, we can't safely call
77 * OF once the kernel has been mapped to KERNELBASE. Therefore all
78 * OF calls must be done within prom_init().
80 * ADDR is used in calls to call_prom. The 4th and following
81 * arguments to call_prom should be 32-bit values.
82 * On ppc64, 64 bit values are truncated to 32 bits (and
83 * fortunately don't get interpreted as two arguments).
85 #define ADDR(x) (u32)(unsigned long)(x)
88 #define OF_WORKAROUNDS 0
90 #define OF_WORKAROUNDS of_workarounds
91 static int of_workarounds __prombss;
94 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
95 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
97 #define PROM_BUG() do { \
98 prom_printf("kernel BUG at %s line 0x%x!\n", \
99 __FILE__, __LINE__); \
104 #define prom_debug(x...) prom_printf(x)
106 #define prom_debug(x...) do { } while (0)
110 typedef u32 prom_arg_t;
128 struct mem_map_entry {
133 typedef __be32 cell_t;
135 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
136 unsigned long r6, unsigned long r7, unsigned long r8,
140 extern int enter_prom(struct prom_args *args, unsigned long entry);
142 static inline int enter_prom(struct prom_args *args, unsigned long entry)
144 return ((int (*)(struct prom_args *))entry)(args);
148 extern void copy_and_flush(unsigned long dest, unsigned long src,
149 unsigned long size, unsigned long offset);
152 static struct prom_t __prombss prom;
154 static unsigned long __prombss prom_entry;
156 static char __prombss of_stdout_device[256];
157 static char __prombss prom_scratch[256];
159 static unsigned long __prombss dt_header_start;
160 static unsigned long __prombss dt_struct_start, dt_struct_end;
161 static unsigned long __prombss dt_string_start, dt_string_end;
163 static unsigned long __prombss prom_initrd_start, prom_initrd_end;
166 static int __prombss prom_iommu_force_on;
167 static int __prombss prom_iommu_off;
168 static unsigned long __prombss prom_tce_alloc_start;
169 static unsigned long __prombss prom_tce_alloc_end;
172 #ifdef CONFIG_PPC_PSERIES
173 static bool __prombss prom_radix_disable;
174 static bool __prombss prom_radix_gtse_disable;
175 static bool __prombss prom_xive_disable;
178 #ifdef CONFIG_PPC_SVM
179 static bool __prombss prom_svm_enable;
182 struct platform_support {
189 /* Platforms codes are now obsolete in the kernel. Now only used within this
190 * file and ultimately gone too. Feel free to change them if you need, they
191 * are not shared with anything outside of this file anymore
193 #define PLATFORM_PSERIES 0x0100
194 #define PLATFORM_PSERIES_LPAR 0x0101
195 #define PLATFORM_LPAR 0x0001
196 #define PLATFORM_POWERMAC 0x0400
197 #define PLATFORM_GENERIC 0x0500
199 static int __prombss of_platform;
201 static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
203 static unsigned long __prombss prom_memory_limit;
205 static unsigned long __prombss alloc_top;
206 static unsigned long __prombss alloc_top_high;
207 static unsigned long __prombss alloc_bottom;
208 static unsigned long __prombss rmo_top;
209 static unsigned long __prombss ram_top;
211 static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
212 static int __prombss mem_reserve_cnt;
214 static cell_t __prombss regbuf[1024];
216 static bool __prombss rtas_has_query_cpu_stopped;
220 * Error results ... some OF calls will return "-1" on error, some
221 * will return 0, some will return either. To simplify, here are
222 * macros to use with any ihandle or phandle return value to check if
226 #define PROM_ERROR (-1u)
227 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
228 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
230 /* Copied from lib/string.c and lib/kstrtox.c */
232 static int __init prom_strcmp(const char *cs, const char *ct)
234 unsigned char c1, c2;
240 return c1 < c2 ? -1 : 1;
247 static ssize_t __init prom_strscpy_pad(char *dest, const char *src, size_t n)
252 if (n == 0 || n > INT_MAX)
255 // Copy up to n bytes
256 for (i = 0; i < n && src[i] != '\0'; i++)
261 // If we copied all n then we have run out of space for the nul
263 // Rewind by one character to ensure nul termination
274 static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
276 unsigned char c1, c2;
282 return c1 < c2 ? -1 : 1;
290 static size_t __init prom_strlen(const char *s)
294 for (sc = s; *sc != '\0'; ++sc)
299 static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
301 const unsigned char *su1, *su2;
304 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
305 if ((res = *su1 - *su2) != 0)
310 static char __init *prom_strstr(const char *s1, const char *s2)
314 l2 = prom_strlen(s2);
317 l1 = prom_strlen(s1);
320 if (!prom_memcmp(s1, s2, l2))
327 static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
329 size_t dsize = prom_strlen(dest);
330 size_t len = prom_strlen(src);
331 size_t res = dsize + len;
333 /* This would be a bug */
341 memcpy(dest, src, len);
347 #ifdef CONFIG_PPC_PSERIES
348 static int __init prom_strtobool(const char *s, bool *res)
387 /* This is the one and *ONLY* place where we actually call open
391 static int __init call_prom(const char *service, int nargs, int nret, ...)
394 struct prom_args args;
397 args.service = cpu_to_be32(ADDR(service));
398 args.nargs = cpu_to_be32(nargs);
399 args.nret = cpu_to_be32(nret);
401 va_start(list, nret);
402 for (i = 0; i < nargs; i++)
403 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
406 for (i = 0; i < nret; i++)
407 args.args[nargs+i] = 0;
409 if (enter_prom(&args, prom_entry) < 0)
412 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
415 static int __init call_prom_ret(const char *service, int nargs, int nret,
416 prom_arg_t *rets, ...)
419 struct prom_args args;
422 args.service = cpu_to_be32(ADDR(service));
423 args.nargs = cpu_to_be32(nargs);
424 args.nret = cpu_to_be32(nret);
426 va_start(list, rets);
427 for (i = 0; i < nargs; i++)
428 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
431 for (i = 0; i < nret; i++)
432 args.args[nargs+i] = 0;
434 if (enter_prom(&args, prom_entry) < 0)
438 for (i = 1; i < nret; ++i)
439 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
441 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
445 static void __init prom_print(const char *msg)
449 if (prom.stdout == 0)
452 for (p = msg; *p != 0; p = q) {
453 for (q = p; *q != 0 && *q != '\n'; ++q)
456 call_prom("write", 3, 1, prom.stdout, p, q - p);
460 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
466 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
467 * we do not need __udivdi3 or __umoddi3 on 32bits.
469 static void __init prom_print_hex(unsigned long val)
471 int i, nibbles = sizeof(val)*2;
472 char buf[sizeof(val)*2+1];
474 for (i = nibbles-1; i >= 0; i--) {
475 buf[i] = (val & 0xf) + '0';
477 buf[i] += ('a'-'0'-10);
481 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
484 /* max number of decimal digits in an unsigned long */
486 static void __init prom_print_dec(unsigned long val)
489 char buf[UL_DIGITS+1];
491 for (i = UL_DIGITS-1; i >= 0; i--) {
492 buf[i] = (val % 10) + '0';
497 /* shift stuff down */
498 size = UL_DIGITS - i;
499 call_prom("write", 3, 1, prom.stdout, buf+i, size);
503 static void __init prom_printf(const char *format, ...)
505 const char *p, *q, *s;
511 va_start(args, format);
512 for (p = format; *p != 0; p = q) {
513 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
516 call_prom("write", 3, 1, prom.stdout, p, q - p);
521 call_prom("write", 3, 1, prom.stdout,
535 s = va_arg(args, const char *);
542 v = va_arg(args, unsigned int);
545 v = va_arg(args, unsigned long);
549 v = va_arg(args, unsigned long long);
558 v = va_arg(args, unsigned int);
561 v = va_arg(args, unsigned long);
565 v = va_arg(args, unsigned long long);
574 vs = va_arg(args, int);
577 vs = va_arg(args, long);
581 vs = va_arg(args, long long);
596 static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
600 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
602 * Old OF requires we claim physical and virtual separately
603 * and then map explicitly (assuming virtual mode)
608 ret = call_prom_ret("call-method", 5, 2, &result,
609 ADDR("claim"), prom.memory,
611 if (ret != 0 || result == -1)
613 ret = call_prom_ret("call-method", 5, 2, &result,
614 ADDR("claim"), prom.mmumap,
617 call_prom("call-method", 4, 1, ADDR("release"),
618 prom.memory, size, virt);
621 /* the 0x12 is M (coherence) + PP == read/write */
622 call_prom("call-method", 6, 1,
623 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
626 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
630 static void __init __attribute__((noreturn)) prom_panic(const char *reason)
633 /* Do not call exit because it clears the screen on pmac
634 * it also causes some sort of double-fault on early pmacs */
635 if (of_platform == PLATFORM_POWERMAC)
638 /* ToDo: should put up an SRC here on pSeries */
639 call_prom("exit", 0, 0);
641 for (;;) /* should never get here */
646 static int __init prom_next_node(phandle *nodep)
650 if ((node = *nodep) != 0
651 && (*nodep = call_prom("child", 1, 1, node)) != 0)
653 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
656 if ((node = call_prom("parent", 1, 1, node)) == 0)
658 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
663 static inline int __init prom_getprop(phandle node, const char *pname,
664 void *value, size_t valuelen)
666 return call_prom("getprop", 4, 1, node, ADDR(pname),
667 (u32)(unsigned long) value, (u32) valuelen);
670 static inline int __init prom_getproplen(phandle node, const char *pname)
672 return call_prom("getproplen", 2, 1, node, ADDR(pname));
675 static void add_string(char **str, const char *q)
685 static char *tohex(unsigned int x)
687 static const char digits[] __initconst = "0123456789abcdef";
688 static char result[9] __prombss;
695 result[i] = digits[x & 0xf];
697 } while (x != 0 && i > 0);
701 static int __init prom_setprop(phandle node, const char *nodename,
702 const char *pname, void *value, size_t valuelen)
706 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
707 return call_prom("setprop", 4, 1, node, ADDR(pname),
708 (u32)(unsigned long) value, (u32) valuelen);
710 /* gah... setprop doesn't work on longtrail, have to use interpret */
712 add_string(&p, "dev");
713 add_string(&p, nodename);
714 add_string(&p, tohex((u32)(unsigned long) value));
715 add_string(&p, tohex(valuelen));
716 add_string(&p, tohex(ADDR(pname)));
717 add_string(&p, tohex(prom_strlen(pname)));
718 add_string(&p, "property");
720 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
723 /* We can't use the standard versions because of relocation headaches. */
724 #define prom_isxdigit(c) \
725 (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F'))
727 #define prom_isdigit(c) ('0' <= (c) && (c) <= '9')
728 #define prom_islower(c) ('a' <= (c) && (c) <= 'z')
729 #define prom_toupper(c) (prom_islower(c) ? ((c) - 'a' + 'A') : (c))
731 static unsigned long prom_strtoul(const char *cp, const char **endp)
733 unsigned long result = 0, base = 10, value;
738 if (prom_toupper(*cp) == 'X') {
744 while (prom_isxdigit(*cp) &&
745 (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
746 result = result * base + value;
756 static unsigned long prom_memparse(const char *ptr, const char **retptr)
758 unsigned long ret = prom_strtoul(ptr, retptr);
762 * We can't use a switch here because GCC *may* generate a
763 * jump table which won't work, because we're not running at
764 * the address we're linked at.
766 if ('G' == **retptr || 'g' == **retptr)
769 if ('M' == **retptr || 'm' == **retptr)
772 if ('K' == **retptr || 'k' == **retptr)
784 * Early parsing of the command line passed to the kernel, used for
785 * "mem=x" and the options that affect the iommu
787 static void __init early_cmdline_parse(void)
794 prom_cmd_line[0] = 0;
797 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
798 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
800 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
801 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
802 sizeof(prom_cmd_line));
804 prom_printf("command line: %s\n", prom_cmd_line);
807 opt = prom_strstr(prom_cmd_line, "iommu=");
809 prom_printf("iommu opt is: %s\n", opt);
811 while (*opt && *opt == ' ')
813 if (!prom_strncmp(opt, "off", 3))
815 else if (!prom_strncmp(opt, "force", 5))
816 prom_iommu_force_on = 1;
819 opt = prom_strstr(prom_cmd_line, "mem=");
822 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
824 /* Align to 16 MB == size of ppc64 large page */
825 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
829 #ifdef CONFIG_PPC_PSERIES
830 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
831 opt = prom_strstr(prom_cmd_line, "disable_radix");
834 if (*opt && *opt == '=') {
837 if (prom_strtobool(++opt, &val))
838 prom_radix_disable = false;
840 prom_radix_disable = val;
842 prom_radix_disable = true;
844 if (prom_radix_disable)
845 prom_debug("Radix disabled from cmdline\n");
847 opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
849 prom_radix_gtse_disable = true;
850 prom_debug("Radix GTSE disabled from cmdline\n");
853 opt = prom_strstr(prom_cmd_line, "xive=off");
855 prom_xive_disable = true;
856 prom_debug("XIVE disabled from cmdline\n");
858 #endif /* CONFIG_PPC_PSERIES */
860 #ifdef CONFIG_PPC_SVM
861 opt = prom_strstr(prom_cmd_line, "svm=");
865 opt += sizeof("svm=") - 1;
866 if (!prom_strtobool(opt, &val))
867 prom_svm_enable = val;
869 #endif /* CONFIG_PPC_SVM */
872 #ifdef CONFIG_PPC_PSERIES
874 * The architecture vector has an array of PVR mask/value pairs,
875 * followed by # option vectors - 1, followed by the option vectors.
877 * See prom.h for the definition of the bits specified in the
878 * architecture vector.
881 /* Firmware expects the value to be n - 1, where n is the # of vectors */
882 #define NUM_VECTORS(n) ((n) - 1)
885 * Firmware expects 1 + n - 2, where n is the length of the option vector in
886 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
888 #define VECTOR_LENGTH(n) (1 + (n) - 2)
890 struct option_vector1 {
896 struct option_vector2 {
910 struct option_vector3 {
915 struct option_vector4 {
920 struct option_vector5 {
932 u8 platform_facilities;
943 struct option_vector6 {
949 struct option_vector7 {
953 struct ibm_arch_vec {
954 struct { u32 mask, val; } pvrs[14];
959 struct option_vector1 vec1;
962 struct option_vector2 vec2;
965 struct option_vector3 vec3;
968 struct option_vector4 vec4;
971 struct option_vector5 vec5;
974 struct option_vector6 vec6;
977 struct option_vector7 vec7;
980 static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
983 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
984 .val = cpu_to_be32(0x003a0000),
987 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
988 .val = cpu_to_be32(0x003e0000),
991 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
992 .val = cpu_to_be32(0x003f0000),
995 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
996 .val = cpu_to_be32(0x004b0000),
999 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
1000 .val = cpu_to_be32(0x004c0000),
1003 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
1004 .val = cpu_to_be32(0x004d0000),
1007 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
1008 .val = cpu_to_be32(0x004e0000),
1011 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
1012 .val = cpu_to_be32(0x00800000),
1015 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
1016 .val = cpu_to_be32(0x0f000006),
1019 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
1020 .val = cpu_to_be32(0x0f000005),
1023 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
1024 .val = cpu_to_be32(0x0f000004),
1027 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
1028 .val = cpu_to_be32(0x0f000003),
1031 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
1032 .val = cpu_to_be32(0x0f000002),
1035 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1036 .val = cpu_to_be32(0x0f000001),
1040 .num_vectors = NUM_VECTORS(6),
1042 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1045 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1046 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1047 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1050 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1051 /* option vector 2: Open Firmware options supported */
1053 .byte1 = OV2_REAL_MODE,
1055 .real_base = cpu_to_be32(0xffffffff),
1056 .real_size = cpu_to_be32(0xffffffff),
1057 .virt_base = cpu_to_be32(0xffffffff),
1058 .virt_size = cpu_to_be32(0xffffffff),
1059 .load_base = cpu_to_be32(0xffffffff),
1060 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1061 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1062 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1063 .max_pft_size = 48, /* max log_2(hash table size) */
1066 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1067 /* option vector 3: processor options supported */
1069 .byte1 = 0, /* don't ignore, don't halt */
1070 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1073 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1074 /* option vector 4: IBM PAPR implementation */
1076 .byte1 = 0, /* don't halt */
1077 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1080 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1081 /* option vector 5: PAPR/OF options */
1083 .byte1 = 0, /* don't ignore, don't halt */
1084 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1085 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1086 #ifdef CONFIG_PCI_MSI
1087 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1094 #ifdef CONFIG_PPC_SMLPAR
1095 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1099 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
1100 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1101 .micro_checkpoint = 0,
1103 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1106 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1110 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1117 /* option vector 6: IBM PAPR hints */
1118 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1121 .secondary_pteg = 0,
1122 .os_name = OV6_LINUX,
1125 /* option vector 7: OS Identification */
1126 .vec7_len = VECTOR_LENGTH(sizeof(struct option_vector7)),
1129 static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1131 /* Old method - ELF header with PT_NOTE sections only works on BE */
1132 #ifdef __BIG_ENDIAN__
1133 static const struct fake_elf {
1140 char name[8]; /* "PowerPC" */
1154 char name[24]; /* "IBM,RPA-Client-Config" */
1158 u32 min_rmo_percent;
1166 } fake_elf __initconst = {
1168 .e_ident = { 0x7f, 'E', 'L', 'F',
1169 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1170 .e_type = ET_EXEC, /* yeah right */
1171 .e_machine = EM_PPC,
1172 .e_version = EV_CURRENT,
1173 .e_phoff = offsetof(struct fake_elf, phdr),
1174 .e_phentsize = sizeof(Elf32_Phdr),
1180 .p_offset = offsetof(struct fake_elf, chrpnote),
1181 .p_filesz = sizeof(struct chrpnote)
1184 .p_offset = offsetof(struct fake_elf, rpanote),
1185 .p_filesz = sizeof(struct rpanote)
1189 .namesz = sizeof("PowerPC"),
1190 .descsz = sizeof(struct chrpdesc),
1194 .real_mode = ~0U, /* ~0 means "don't care" */
1203 .namesz = sizeof("IBM,RPA-Client-Config"),
1204 .descsz = sizeof(struct rpadesc),
1206 .name = "IBM,RPA-Client-Config",
1209 .min_rmo_size = 64, /* in megabytes */
1210 .min_rmo_percent = 0,
1211 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1218 #endif /* __BIG_ENDIAN__ */
1220 static int __init prom_count_smt_threads(void)
1226 /* Pick up th first CPU node we can find */
1227 for (node = 0; prom_next_node(&node); ) {
1229 prom_getprop(node, "device_type", type, sizeof(type));
1231 if (prom_strcmp(type, "cpu"))
1234 * There is an entry for each smt thread, each entry being
1235 * 4 bytes long. All cpus should have the same number of
1236 * smt threads, so return after finding the first.
1238 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1239 if (plen == PROM_ERROR)
1242 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1245 if (plen < 1 || plen > 64) {
1246 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1247 (unsigned long)plen);
1252 prom_debug("No threads found, assuming 1 per core\n");
1258 static void __init prom_parse_mmu_model(u8 val,
1259 struct platform_support *support)
1262 case OV5_FEAT(OV5_MMU_DYNAMIC):
1263 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1264 prom_debug("MMU - either supported\n");
1265 support->radix_mmu = !prom_radix_disable;
1266 support->hash_mmu = true;
1268 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1269 prom_debug("MMU - radix only\n");
1270 if (prom_radix_disable) {
1272 * If we __have__ to do radix, we're better off ignoring
1273 * the command line rather than not booting.
1275 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1277 support->radix_mmu = true;
1279 case OV5_FEAT(OV5_MMU_HASH):
1280 prom_debug("MMU - hash only\n");
1281 support->hash_mmu = true;
1284 prom_debug("Unknown mmu support option: 0x%x\n", val);
1289 static void __init prom_parse_xive_model(u8 val,
1290 struct platform_support *support)
1293 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1294 prom_debug("XIVE - either mode supported\n");
1295 support->xive = !prom_xive_disable;
1297 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1298 prom_debug("XIVE - exploitation mode supported\n");
1299 if (prom_xive_disable) {
1301 * If we __have__ to do XIVE, we're better off ignoring
1302 * the command line rather than not booting.
1304 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1306 support->xive = true;
1308 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1309 prom_debug("XIVE - legacy mode supported\n");
1312 prom_debug("Unknown xive support option: 0x%x\n", val);
1317 static void __init prom_parse_platform_support(u8 index, u8 val,
1318 struct platform_support *support)
1321 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1322 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1324 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1325 if (val & OV5_FEAT(OV5_RADIX_GTSE))
1326 support->radix_gtse = !prom_radix_gtse_disable;
1328 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1329 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1335 static void __init prom_check_platform_support(void)
1337 struct platform_support supported = {
1340 .radix_gtse = false,
1343 int prop_len = prom_getproplen(prom.chosen,
1344 "ibm,arch-vec-5-platform-support");
1347 * First copy the architecture vec template
1349 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1350 * by __memcpy() when KASAN is active
1352 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1353 sizeof(ibm_architecture_vec));
1355 prom_strscpy_pad(ibm_architecture_vec.vec7.os_id, linux_banner, 256);
1360 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1362 if (prop_len > sizeof(vec))
1363 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1365 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", &vec, sizeof(vec));
1366 for (i = 0; i < prop_len; i += 2) {
1367 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2, vec[i], vec[i + 1]);
1368 prom_parse_platform_support(vec[i], vec[i + 1], &supported);
1372 if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1373 /* Radix preferred - Check if GTSE is also supported */
1374 prom_debug("Asking for radix\n");
1375 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1376 if (supported.radix_gtse)
1377 ibm_architecture_vec.vec5.radix_ext =
1378 OV5_FEAT(OV5_RADIX_GTSE);
1380 prom_debug("Radix GTSE isn't supported\n");
1381 } else if (supported.hash_mmu) {
1382 /* Default to hash mmu (if we can) */
1383 prom_debug("Asking for hash\n");
1384 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1386 /* We're probably on a legacy hypervisor */
1387 prom_debug("Assuming legacy hash support\n");
1390 if (supported.xive) {
1391 prom_debug("Asking for XIVE\n");
1392 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1396 static void __init prom_send_capabilities(void)
1402 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1403 prom_check_platform_support();
1405 root = call_prom("open", 1, 1, ADDR("/"));
1407 /* We need to tell the FW about the number of cores we support.
1409 * To do that, we count the number of threads on the first core
1410 * (we assume this is the same for all cores) and use it to
1414 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1415 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1418 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1420 /* try calling the ibm,client-architecture-support method */
1421 prom_printf("Calling ibm,client-architecture-support...");
1422 if (call_prom_ret("call-method", 3, 2, &ret,
1423 ADDR("ibm,client-architecture-support"),
1425 ADDR(&ibm_architecture_vec)) == 0) {
1426 /* the call exists... */
1428 prom_printf("\nWARNING: ibm,client-architecture"
1429 "-support call FAILED!\n");
1430 call_prom("close", 1, 0, root);
1431 prom_printf(" done\n");
1434 call_prom("close", 1, 0, root);
1435 prom_printf(" not implemented\n");
1438 #ifdef __BIG_ENDIAN__
1442 /* no ibm,client-architecture-support call, try the old way */
1443 elfloader = call_prom("open", 1, 1,
1444 ADDR("/packages/elf-loader"));
1445 if (elfloader == 0) {
1446 prom_printf("couldn't open /packages/elf-loader\n");
1449 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1450 elfloader, ADDR(&fake_elf));
1451 call_prom("close", 1, 0, elfloader);
1453 #endif /* __BIG_ENDIAN__ */
1455 #endif /* CONFIG_PPC_PSERIES */
1458 * Memory allocation strategy... our layout is normally:
1460 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1461 * rare cases, initrd might end up being before the kernel though.
1462 * We assume this won't override the final kernel at 0, we have no
1463 * provision to handle that in this version, but it should hopefully
1466 * alloc_top is set to the top of RMO, eventually shrink down if the
1469 * alloc_bottom is set to the top of kernel/initrd
1471 * from there, allocations are done this way : rtas is allocated
1472 * topmost, and the device-tree is allocated from the bottom. We try
1473 * to grow the device-tree allocation as we progress. If we can't,
1474 * then we fail, we don't currently have a facility to restart
1475 * elsewhere, but that shouldn't be necessary.
1477 * Note that calls to reserve_mem have to be done explicitly, memory
1478 * allocated with either alloc_up or alloc_down isn't automatically
1484 * Allocates memory in the RMO upward from the kernel/initrd
1486 * When align is 0, this is a special case, it means to allocate in place
1487 * at the current location of alloc_bottom or fail (that is basically
1488 * extending the previous allocation). Used for the device-tree flattening
1490 static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1492 unsigned long base = alloc_bottom;
1493 unsigned long addr = 0;
1496 base = ALIGN(base, align);
1497 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1499 prom_panic("alloc_up() called with mem not initialized\n");
1502 base = ALIGN(alloc_bottom, align);
1504 base = alloc_bottom;
1506 for(; (base + size) <= alloc_top;
1507 base = ALIGN(base + 0x100000, align)) {
1508 prom_debug(" trying: 0x%lx\n\r", base);
1509 addr = (unsigned long)prom_claim(base, size, 0);
1510 if (addr != PROM_ERROR && addr != 0)
1518 alloc_bottom = addr + size;
1520 prom_debug(" -> %lx\n", addr);
1521 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1522 prom_debug(" alloc_top : %lx\n", alloc_top);
1523 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1524 prom_debug(" rmo_top : %lx\n", rmo_top);
1525 prom_debug(" ram_top : %lx\n", ram_top);
1531 * Allocates memory downward, either from top of RMO, or if highmem
1532 * is set, from the top of RAM. Note that this one doesn't handle
1533 * failures. It does claim memory if highmem is not set.
1535 static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1538 unsigned long base, addr = 0;
1540 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1541 highmem ? "(high)" : "(low)");
1543 prom_panic("alloc_down() called with mem not initialized\n");
1546 /* Carve out storage for the TCE table. */
1547 addr = ALIGN_DOWN(alloc_top_high - size, align);
1548 if (addr <= alloc_bottom)
1550 /* Will we bump into the RMO ? If yes, check out that we
1551 * didn't overlap existing allocations there, if we did,
1552 * we are dead, we must be the first in town !
1554 if (addr < rmo_top) {
1555 /* Good, we are first */
1556 if (alloc_top == rmo_top)
1557 alloc_top = rmo_top = addr;
1561 alloc_top_high = addr;
1565 base = ALIGN_DOWN(alloc_top - size, align);
1566 for (; base > alloc_bottom;
1567 base = ALIGN_DOWN(base - 0x100000, align)) {
1568 prom_debug(" trying: 0x%lx\n\r", base);
1569 addr = (unsigned long)prom_claim(base, size, 0);
1570 if (addr != PROM_ERROR && addr != 0)
1579 prom_debug(" -> %lx\n", addr);
1580 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1581 prom_debug(" alloc_top : %lx\n", alloc_top);
1582 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1583 prom_debug(" rmo_top : %lx\n", rmo_top);
1584 prom_debug(" ram_top : %lx\n", ram_top);
1590 * Parse a "reg" cell
1592 static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1595 unsigned long r = 0;
1597 /* Ignore more than 2 cells */
1598 while (s > sizeof(unsigned long) / 4) {
1602 r = be32_to_cpu(*p++);
1606 r |= be32_to_cpu(*(p++));
1614 * Very dumb function for adding to the memory reserve list, but
1615 * we don't need anything smarter at this point
1617 * XXX Eventually check for collisions. They should NEVER happen.
1618 * If problems seem to show up, it would be a good start to track
1621 static void __init reserve_mem(u64 base, u64 size)
1623 u64 top = base + size;
1624 unsigned long cnt = mem_reserve_cnt;
1629 /* We need to always keep one empty entry so that we
1630 * have our terminator with "size" set to 0 since we are
1631 * dumb and just copy this entire array to the boot params
1633 base = ALIGN_DOWN(base, PAGE_SIZE);
1634 top = ALIGN(top, PAGE_SIZE);
1637 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1638 prom_panic("Memory reserve map exhausted !\n");
1639 mem_reserve_map[cnt].base = cpu_to_be64(base);
1640 mem_reserve_map[cnt].size = cpu_to_be64(size);
1641 mem_reserve_cnt = cnt + 1;
1645 * Initialize memory allocation mechanism, parse "memory" nodes and
1646 * obtain that way the top of memory and RMO to setup out local allocator
1648 static void __init prom_init_mem(void)
1658 * We iterate the memory nodes to find
1659 * 1) top of RMO (first node)
1662 val = cpu_to_be32(2);
1663 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1664 rac = be32_to_cpu(val);
1665 val = cpu_to_be32(1);
1666 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1667 rsc = be32_to_cpu(val);
1668 prom_debug("root_addr_cells: %x\n", rac);
1669 prom_debug("root_size_cells: %x\n", rsc);
1671 prom_debug("scanning memory:\n");
1673 for (node = 0; prom_next_node(&node); ) {
1675 prom_getprop(node, "device_type", type, sizeof(type));
1679 * CHRP Longtrail machines have no device_type
1680 * on the memory node, so check the name instead...
1682 prom_getprop(node, "name", type, sizeof(type));
1684 if (prom_strcmp(type, "memory"))
1687 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1688 if (plen > sizeof(regbuf)) {
1689 prom_printf("memory node too large for buffer !\n");
1690 plen = sizeof(regbuf);
1693 endp = p + (plen / sizeof(cell_t));
1696 memset(prom_scratch, 0, sizeof(prom_scratch));
1697 call_prom("package-to-path", 3, 1, node, prom_scratch,
1698 sizeof(prom_scratch) - 1);
1699 prom_debug(" node %s :\n", prom_scratch);
1700 #endif /* DEBUG_PROM */
1702 while ((endp - p) >= (rac + rsc)) {
1703 unsigned long base, size;
1705 base = prom_next_cell(rac, &p);
1706 size = prom_next_cell(rsc, &p);
1710 prom_debug(" %lx %lx\n", base, size);
1711 if (base == 0 && (of_platform & PLATFORM_LPAR))
1713 if ((base + size) > ram_top)
1714 ram_top = base + size;
1718 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1721 * If prom_memory_limit is set we reduce the upper limits *except* for
1722 * alloc_top_high. This must be the real top of RAM so we can put
1726 alloc_top_high = ram_top;
1728 if (prom_memory_limit) {
1729 if (prom_memory_limit <= alloc_bottom) {
1730 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1732 prom_memory_limit = 0;
1733 } else if (prom_memory_limit >= ram_top) {
1734 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1736 prom_memory_limit = 0;
1738 ram_top = prom_memory_limit;
1739 rmo_top = min(rmo_top, prom_memory_limit);
1744 * Setup our top alloc point, that is top of RMO or top of
1745 * segment 0 when running non-LPAR.
1746 * Some RS64 machines have buggy firmware where claims up at
1747 * 1GB fail. Cap at 768MB as a workaround.
1748 * Since 768MB is plenty of room, and we need to cap to something
1749 * reasonable on 32-bit, cap at 768MB on all machines.
1753 rmo_top = min(0x30000000ul, rmo_top);
1754 alloc_top = rmo_top;
1755 alloc_top_high = ram_top;
1758 * Check if we have an initrd after the kernel but still inside
1759 * the RMO. If we do move our bottom point to after it.
1761 if (prom_initrd_start &&
1762 prom_initrd_start < rmo_top &&
1763 prom_initrd_end > alloc_bottom)
1764 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1766 prom_printf("memory layout at init:\n");
1767 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1769 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1770 prom_printf(" alloc_top : %lx\n", alloc_top);
1771 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1772 prom_printf(" rmo_top : %lx\n", rmo_top);
1773 prom_printf(" ram_top : %lx\n", ram_top);
1776 static void __init prom_close_stdin(void)
1781 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1782 stdin = be32_to_cpu(val);
1783 call_prom("close", 1, 0, stdin);
1787 #ifdef CONFIG_PPC_SVM
1788 static int prom_rtas_hcall(uint64_t args)
1790 register uint64_t arg1 asm("r3") = H_RTAS;
1791 register uint64_t arg2 asm("r4") = args;
1793 asm volatile("sc 1\n" : "=r" (arg1) :
1796 srr_regs_clobbered();
1801 static struct rtas_args __prombss os_term_args;
1803 static void __init prom_rtas_os_term(char *str)
1809 prom_debug("%s: start...\n", __func__);
1810 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1811 prom_debug("rtas_node: %x\n", rtas_node);
1812 if (!PHANDLE_VALID(rtas_node))
1816 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1817 token = be32_to_cpu(val);
1818 prom_debug("ibm,os-term: %x\n", token);
1820 prom_panic("Could not get token for ibm,os-term\n");
1821 os_term_args.token = cpu_to_be32(token);
1822 os_term_args.nargs = cpu_to_be32(1);
1823 os_term_args.nret = cpu_to_be32(1);
1824 os_term_args.args[0] = cpu_to_be32(__pa(str));
1825 prom_rtas_hcall((uint64_t)&os_term_args);
1827 #endif /* CONFIG_PPC_SVM */
1830 * Allocate room for and instantiate RTAS
1832 static void __init prom_instantiate_rtas(void)
1836 u32 base, entry = 0;
1840 prom_debug("prom_instantiate_rtas: start...\n");
1842 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1843 prom_debug("rtas_node: %x\n", rtas_node);
1844 if (!PHANDLE_VALID(rtas_node))
1848 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1849 size = be32_to_cpu(val);
1853 base = alloc_down(size, PAGE_SIZE, 0);
1855 prom_panic("Could not allocate memory for RTAS\n");
1857 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1858 if (!IHANDLE_VALID(rtas_inst)) {
1859 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1863 prom_printf("instantiating rtas at 0x%x...", base);
1865 if (call_prom_ret("call-method", 3, 2, &entry,
1866 ADDR("instantiate-rtas"),
1867 rtas_inst, base) != 0
1869 prom_printf(" failed\n");
1872 prom_printf(" done\n");
1874 reserve_mem(base, size);
1876 val = cpu_to_be32(base);
1877 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1879 val = cpu_to_be32(entry);
1880 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1883 /* Check if it supports "query-cpu-stopped-state" */
1884 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1885 &val, sizeof(val)) != PROM_ERROR)
1886 rtas_has_query_cpu_stopped = true;
1888 prom_debug("rtas base = 0x%x\n", base);
1889 prom_debug("rtas entry = 0x%x\n", entry);
1890 prom_debug("rtas size = 0x%x\n", size);
1892 prom_debug("prom_instantiate_rtas: end...\n");
1897 * Allocate room for and instantiate Stored Measurement Log (SML)
1899 static void __init prom_instantiate_sml(void)
1901 phandle ibmvtpm_node;
1902 ihandle ibmvtpm_inst;
1903 u32 entry = 0, size = 0, succ = 0;
1907 prom_debug("prom_instantiate_sml: start...\n");
1909 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1910 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1911 if (!PHANDLE_VALID(ibmvtpm_node))
1914 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1915 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1916 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1920 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1921 &val, sizeof(val)) != PROM_ERROR) {
1922 if (call_prom_ret("call-method", 2, 2, &succ,
1923 ADDR("reformat-sml-to-efi-alignment"),
1924 ibmvtpm_inst) != 0 || succ == 0) {
1925 prom_printf("Reformat SML to EFI alignment failed\n");
1929 if (call_prom_ret("call-method", 2, 2, &size,
1930 ADDR("sml-get-allocated-size"),
1931 ibmvtpm_inst) != 0 || size == 0) {
1932 prom_printf("SML get allocated size failed\n");
1936 if (call_prom_ret("call-method", 2, 2, &size,
1937 ADDR("sml-get-handover-size"),
1938 ibmvtpm_inst) != 0 || size == 0) {
1939 prom_printf("SML get handover size failed\n");
1944 base = alloc_down(size, PAGE_SIZE, 0);
1946 prom_panic("Could not allocate memory for sml\n");
1948 prom_printf("instantiating sml at 0x%llx...", base);
1950 memset((void *)base, 0, size);
1952 if (call_prom_ret("call-method", 4, 2, &entry,
1953 ADDR("sml-handover"),
1954 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1955 prom_printf("SML handover failed\n");
1958 prom_printf(" done\n");
1960 reserve_mem(base, size);
1962 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1963 &base, sizeof(base));
1964 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1965 &size, sizeof(size));
1967 prom_debug("sml base = 0x%llx\n", base);
1968 prom_debug("sml size = 0x%x\n", size);
1970 prom_debug("prom_instantiate_sml: end...\n");
1974 * Allocate room for and initialize TCE tables
1976 #ifdef __BIG_ENDIAN__
1977 static void __init prom_initialize_tce_table(void)
1981 char compatible[64], type[64], model[64];
1982 char *path = prom_scratch;
1984 u32 minalign, minsize;
1985 u64 tce_entry, *tce_entryp;
1986 u64 local_alloc_top, local_alloc_bottom;
1992 prom_debug("starting prom_initialize_tce_table\n");
1994 /* Cache current top of allocs so we reserve a single block */
1995 local_alloc_top = alloc_top_high;
1996 local_alloc_bottom = local_alloc_top;
1998 /* Search all nodes looking for PHBs. */
1999 for (node = 0; prom_next_node(&node); ) {
2003 prom_getprop(node, "compatible",
2004 compatible, sizeof(compatible));
2005 prom_getprop(node, "device_type", type, sizeof(type));
2006 prom_getprop(node, "model", model, sizeof(model));
2008 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
2011 /* Keep the old logic intact to avoid regression. */
2012 if (compatible[0] != 0) {
2013 if ((prom_strstr(compatible, "python") == NULL) &&
2014 (prom_strstr(compatible, "Speedwagon") == NULL) &&
2015 (prom_strstr(compatible, "Winnipeg") == NULL))
2017 } else if (model[0] != 0) {
2018 if ((prom_strstr(model, "ython") == NULL) &&
2019 (prom_strstr(model, "peedwagon") == NULL) &&
2020 (prom_strstr(model, "innipeg") == NULL))
2024 if (prom_getprop(node, "tce-table-minalign", &minalign,
2025 sizeof(minalign)) == PROM_ERROR)
2027 if (prom_getprop(node, "tce-table-minsize", &minsize,
2028 sizeof(minsize)) == PROM_ERROR)
2029 minsize = 4UL << 20;
2032 * Even though we read what OF wants, we just set the table
2033 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
2034 * By doing this, we avoid the pitfalls of trying to DMA to
2035 * MMIO space and the DMA alias hole.
2037 minsize = 4UL << 20;
2039 /* Align to the greater of the align or size */
2040 align = max(minalign, minsize);
2041 base = alloc_down(minsize, align, 1);
2043 prom_panic("ERROR, cannot find space for TCE table.\n");
2044 if (base < local_alloc_bottom)
2045 local_alloc_bottom = base;
2047 /* It seems OF doesn't null-terminate the path :-( */
2048 memset(path, 0, sizeof(prom_scratch));
2049 /* Call OF to setup the TCE hardware */
2050 if (call_prom("package-to-path", 3, 1, node,
2051 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2052 prom_printf("package-to-path failed\n");
2055 /* Save away the TCE table attributes for later use. */
2056 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2057 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2059 prom_debug("TCE table: %s\n", path);
2060 prom_debug("\tnode = 0x%x\n", node);
2061 prom_debug("\tbase = 0x%llx\n", base);
2062 prom_debug("\tsize = 0x%x\n", minsize);
2064 /* Initialize the table to have a one-to-one mapping
2065 * over the allocated size.
2067 tce_entryp = (u64 *)base;
2068 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2069 tce_entry = (i << PAGE_SHIFT);
2071 *tce_entryp = tce_entry;
2074 prom_printf("opening PHB %s", path);
2075 phb_node = call_prom("open", 1, 1, path);
2077 prom_printf("... failed\n");
2079 prom_printf("... done\n");
2081 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2082 phb_node, -1, minsize,
2083 (u32) base, (u32) (base >> 32));
2084 call_prom("close", 1, 0, phb_node);
2087 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2089 /* These are only really needed if there is a memory limit in
2090 * effect, but we don't know so export them always. */
2091 prom_tce_alloc_start = local_alloc_bottom;
2092 prom_tce_alloc_end = local_alloc_top;
2094 /* Flag the first invalid entry */
2095 prom_debug("ending prom_initialize_tce_table\n");
2097 #endif /* __BIG_ENDIAN__ */
2098 #endif /* CONFIG_PPC64 */
2101 * With CHRP SMP we need to use the OF to start the other processors.
2102 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2103 * so we have to put the processors into a holding pattern controlled
2104 * by the kernel (not OF) before we destroy the OF.
2106 * This uses a chunk of low memory, puts some holding pattern
2107 * code there and sends the other processors off to there until
2108 * smp_boot_cpus tells them to do something. The holding pattern
2109 * checks that address until its cpu # is there, when it is that
2110 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2111 * of setting those values.
2113 * We also use physical address 0x4 here to tell when a cpu
2114 * is in its holding pattern code.
2119 * We want to reference the copy of __secondary_hold_* in the
2120 * 0 - 0x100 address range
2122 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2124 static void __init prom_hold_cpus(void)
2129 unsigned long *spinloop
2130 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2131 unsigned long *acknowledge
2132 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2133 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2136 * On pseries, if RTAS supports "query-cpu-stopped-state",
2137 * we skip this stage, the CPUs will be started by the
2138 * kernel using RTAS.
2140 if ((of_platform == PLATFORM_PSERIES ||
2141 of_platform == PLATFORM_PSERIES_LPAR) &&
2142 rtas_has_query_cpu_stopped) {
2143 prom_printf("prom_hold_cpus: skipped\n");
2147 prom_debug("prom_hold_cpus: start...\n");
2148 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2149 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2150 prom_debug(" 1) acknowledge = 0x%lx\n",
2151 (unsigned long)acknowledge);
2152 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2153 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2155 /* Set the common spinloop variable, so all of the secondary cpus
2156 * will block when they are awakened from their OF spinloop.
2157 * This must occur for both SMP and non SMP kernels, since OF will
2158 * be trashed when we move the kernel.
2163 for (node = 0; prom_next_node(&node); ) {
2164 unsigned int cpu_no;
2168 prom_getprop(node, "device_type", type, sizeof(type));
2169 if (prom_strcmp(type, "cpu") != 0)
2172 /* Skip non-configured cpus. */
2173 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2174 if (prom_strcmp(type, "okay") != 0)
2177 reg = cpu_to_be32(-1); /* make sparse happy */
2178 prom_getprop(node, "reg", ®, sizeof(reg));
2179 cpu_no = be32_to_cpu(reg);
2181 prom_debug("cpu hw idx = %u\n", cpu_no);
2183 /* Init the acknowledge var which will be reset by
2184 * the secondary cpu when it awakens from its OF
2187 *acknowledge = (unsigned long)-1;
2189 if (cpu_no != prom.cpu) {
2190 /* Primary Thread of non-boot cpu or any thread */
2191 prom_printf("starting cpu hw idx %u... ", cpu_no);
2192 call_prom("start-cpu", 3, 0, node,
2193 secondary_hold, cpu_no);
2195 for (i = 0; (i < 100000000) &&
2196 (*acknowledge == ((unsigned long)-1)); i++ )
2199 if (*acknowledge == cpu_no)
2200 prom_printf("done\n");
2202 prom_printf("failed: %lx\n", *acknowledge);
2206 prom_printf("boot cpu hw idx %u\n", cpu_no);
2207 #endif /* CONFIG_SMP */
2210 prom_debug("prom_hold_cpus: end...\n");
2214 static void __init prom_init_client_services(unsigned long pp)
2216 /* Get a handle to the prom entry point before anything else */
2219 /* get a handle for the stdout device */
2220 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2221 if (!PHANDLE_VALID(prom.chosen))
2222 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2224 /* get device tree root */
2225 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2226 if (!PHANDLE_VALID(prom.root))
2227 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2234 * For really old powermacs, we need to map things we claim.
2235 * For that, we need the ihandle of the mmu.
2236 * Also, on the longtrail, we need to work around other bugs.
2238 static void __init prom_find_mmu(void)
2243 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2244 if (!PHANDLE_VALID(oprom))
2246 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2248 version[sizeof(version) - 1] = 0;
2249 /* XXX might need to add other versions here */
2250 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2251 of_workarounds = OF_WA_CLAIM;
2252 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2253 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2254 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2257 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2258 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2259 sizeof(prom.mmumap));
2260 prom.mmumap = be32_to_cpu(prom.mmumap);
2261 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2262 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2265 #define prom_find_mmu()
2268 static void __init prom_init_stdout(void)
2270 char *path = of_stdout_device;
2272 phandle stdout_node;
2275 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2276 prom_panic("cannot find stdout");
2278 prom.stdout = be32_to_cpu(val);
2280 /* Get the full OF pathname of the stdout device */
2281 memset(path, 0, 256);
2282 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2283 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2284 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2285 path, prom_strlen(path) + 1);
2287 /* instance-to-package fails on PA-Semi */
2288 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2289 if (stdout_node != PROM_ERROR) {
2290 val = cpu_to_be32(stdout_node);
2292 /* If it's a display, note it */
2293 memset(type, 0, sizeof(type));
2294 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2295 if (prom_strcmp(type, "display") == 0)
2296 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2300 static int __init prom_find_machine_type(void)
2309 /* Look for a PowerMac or a Cell */
2310 len = prom_getprop(prom.root, "compatible",
2311 compat, sizeof(compat)-1);
2315 char *p = &compat[i];
2316 int sl = prom_strlen(p);
2319 if (prom_strstr(p, "Power Macintosh") ||
2320 prom_strstr(p, "MacRISC"))
2321 return PLATFORM_POWERMAC;
2323 /* We must make sure we don't detect the IBM Cell
2324 * blades as pSeries due to some firmware issues,
2327 if (prom_strstr(p, "IBM,CBEA") ||
2328 prom_strstr(p, "IBM,CPBW-1.0"))
2329 return PLATFORM_GENERIC;
2330 #endif /* CONFIG_PPC64 */
2335 /* Try to figure out if it's an IBM pSeries or any other
2336 * PAPR compliant platform. We assume it is if :
2337 * - /device_type is "chrp" (please, do NOT use that for future
2341 len = prom_getprop(prom.root, "device_type",
2342 compat, sizeof(compat)-1);
2344 return PLATFORM_GENERIC;
2345 if (prom_strcmp(compat, "chrp"))
2346 return PLATFORM_GENERIC;
2348 /* Default to pSeries. We need to know if we are running LPAR */
2349 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2350 if (!PHANDLE_VALID(rtas))
2351 return PLATFORM_GENERIC;
2352 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2353 if (x != PROM_ERROR) {
2354 prom_debug("Hypertas detected, assuming LPAR !\n");
2355 return PLATFORM_PSERIES_LPAR;
2357 return PLATFORM_PSERIES;
2359 return PLATFORM_GENERIC;
2363 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2365 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2369 * If we have a display that we don't know how to drive,
2370 * we will want to try to execute OF's open method for it
2371 * later. However, OF will probably fall over if we do that
2372 * we've taken over the MMU.
2373 * So we check whether we will need to open the display,
2374 * and if so, open it now.
2376 static void __init prom_check_displays(void)
2378 char type[16], *path;
2383 static const unsigned char default_colors[] __initconst = {
2401 const unsigned char *clut;
2403 prom_debug("Looking for displays\n");
2404 for (node = 0; prom_next_node(&node); ) {
2405 memset(type, 0, sizeof(type));
2406 prom_getprop(node, "device_type", type, sizeof(type));
2407 if (prom_strcmp(type, "display") != 0)
2410 /* It seems OF doesn't null-terminate the path :-( */
2411 path = prom_scratch;
2412 memset(path, 0, sizeof(prom_scratch));
2415 * leave some room at the end of the path for appending extra
2418 if (call_prom("package-to-path", 3, 1, node, path,
2419 sizeof(prom_scratch) - 10) == PROM_ERROR)
2421 prom_printf("found display : %s, opening... ", path);
2423 ih = call_prom("open", 1, 1, path);
2425 prom_printf("failed\n");
2430 prom_printf("done\n");
2431 prom_setprop(node, path, "linux,opened", NULL, 0);
2433 /* Setup a usable color table when the appropriate
2434 * method is available. Should update this to set-colors */
2435 clut = default_colors;
2436 for (i = 0; i < 16; i++, clut += 3)
2437 if (prom_set_color(ih, i, clut[0], clut[1],
2441 #ifdef CONFIG_LOGO_LINUX_CLUT224
2442 clut = PTRRELOC(logo_linux_clut224.clut);
2443 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2444 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2447 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
2449 #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2450 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2452 u32 width, height, pitch, addr;
2454 prom_printf("Setting btext !\n");
2456 if (prom_getprop(node, "width", &width, 4) == PROM_ERROR)
2459 if (prom_getprop(node, "height", &height, 4) == PROM_ERROR)
2462 if (prom_getprop(node, "linebytes", &pitch, 4) == PROM_ERROR)
2465 if (prom_getprop(node, "address", &addr, 4) == PROM_ERROR)
2468 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2469 width, height, pitch, addr);
2470 btext_setup_display(width, height, 8, pitch, addr);
2471 btext_prepare_BAT();
2473 #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2478 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2479 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2480 unsigned long needed, unsigned long align)
2484 *mem_start = ALIGN(*mem_start, align);
2485 while ((*mem_start + needed) > *mem_end) {
2486 unsigned long room, chunk;
2488 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2490 room = alloc_top - alloc_bottom;
2491 if (room > DEVTREE_CHUNK_SIZE)
2492 room = DEVTREE_CHUNK_SIZE;
2493 if (room < PAGE_SIZE)
2494 prom_panic("No memory for flatten_device_tree "
2496 chunk = alloc_up(room, 0);
2498 prom_panic("No memory for flatten_device_tree "
2499 "(claim failed)\n");
2500 *mem_end = chunk + room;
2503 ret = (void *)*mem_start;
2504 *mem_start += needed;
2509 #define dt_push_token(token, mem_start, mem_end) do { \
2510 void *room = make_room(mem_start, mem_end, 4, 4); \
2511 *(__be32 *)room = cpu_to_be32(token); \
2514 static unsigned long __init dt_find_string(char *str)
2518 s = os = (char *)dt_string_start;
2520 while (s < (char *)dt_string_end) {
2521 if (prom_strcmp(s, str) == 0)
2523 s += prom_strlen(s) + 1;
2529 * The Open Firmware 1275 specification states properties must be 31 bytes or
2530 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2532 #define MAX_PROPERTY_NAME 64
2534 static void __init scan_dt_build_strings(phandle node,
2535 unsigned long *mem_start,
2536 unsigned long *mem_end)
2538 char *prev_name, *namep, *sstart;
2542 sstart = (char *)dt_string_start;
2544 /* get and store all property names */
2547 /* 64 is max len of name including nul. */
2548 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2549 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2550 /* No more nodes: unwind alloc */
2551 *mem_start = (unsigned long)namep;
2556 if (prom_strcmp(namep, "name") == 0) {
2557 *mem_start = (unsigned long)namep;
2561 /* get/create string entry */
2562 soff = dt_find_string(namep);
2564 *mem_start = (unsigned long)namep;
2565 namep = sstart + soff;
2567 /* Trim off some if we can */
2568 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2569 dt_string_end = *mem_start;
2574 /* do all our children */
2575 child = call_prom("child", 1, 1, node);
2576 while (child != 0) {
2577 scan_dt_build_strings(child, mem_start, mem_end);
2578 child = call_prom("peer", 1, 1, child);
2582 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2583 unsigned long *mem_end)
2586 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2588 unsigned char *valp;
2589 static char pname[MAX_PROPERTY_NAME] __prombss;
2590 int l, room, has_phandle = 0;
2592 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2594 /* get the node's full name */
2595 namep = (char *)*mem_start;
2596 room = *mem_end - *mem_start;
2599 l = call_prom("package-to-path", 3, 1, node, namep, room);
2601 /* Didn't fit? Get more room. */
2603 if (l >= *mem_end - *mem_start)
2604 namep = make_room(mem_start, mem_end, l+1, 1);
2605 call_prom("package-to-path", 3, 1, node, namep, l);
2609 /* Fixup an Apple bug where they have bogus \0 chars in the
2610 * middle of the path in some properties, and extract
2611 * the unit name (everything after the last '/').
2613 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2620 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2623 /* get it again for debugging */
2624 path = prom_scratch;
2625 memset(path, 0, sizeof(prom_scratch));
2626 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2628 /* get and store all properties */
2630 sstart = (char *)dt_string_start;
2632 if (call_prom("nextprop", 3, 1, node, prev_name,
2637 if (prom_strcmp(pname, "name") == 0) {
2642 /* find string offset */
2643 soff = dt_find_string(pname);
2645 prom_printf("WARNING: Can't find string index for"
2646 " <%s>, node %s\n", pname, path);
2649 prev_name = sstart + soff;
2652 l = call_prom("getproplen", 2, 1, node, pname);
2655 if (l == PROM_ERROR)
2658 /* push property head */
2659 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2660 dt_push_token(l, mem_start, mem_end);
2661 dt_push_token(soff, mem_start, mem_end);
2663 /* push property content */
2664 valp = make_room(mem_start, mem_end, l, 4);
2665 call_prom("getprop", 4, 1, node, pname, valp, l);
2666 *mem_start = ALIGN(*mem_start, 4);
2668 if (!prom_strcmp(pname, "phandle"))
2672 /* Add a "phandle" property if none already exist */
2674 soff = dt_find_string("phandle");
2676 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2678 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2679 dt_push_token(4, mem_start, mem_end);
2680 dt_push_token(soff, mem_start, mem_end);
2681 valp = make_room(mem_start, mem_end, 4, 4);
2682 *(__be32 *)valp = cpu_to_be32(node);
2686 /* do all our children */
2687 child = call_prom("child", 1, 1, node);
2688 while (child != 0) {
2689 scan_dt_build_struct(child, mem_start, mem_end);
2690 child = call_prom("peer", 1, 1, child);
2693 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2696 static void __init flatten_device_tree(void)
2699 unsigned long mem_start, mem_end, room;
2700 struct boot_param_header *hdr;
2705 * Check how much room we have between alloc top & bottom (+/- a
2706 * few pages), crop to 1MB, as this is our "chunk" size
2708 room = alloc_top - alloc_bottom - 0x4000;
2709 if (room > DEVTREE_CHUNK_SIZE)
2710 room = DEVTREE_CHUNK_SIZE;
2711 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2713 /* Now try to claim that */
2714 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2716 prom_panic("Can't allocate initial device-tree chunk\n");
2717 mem_end = mem_start + room;
2719 /* Get root of tree */
2720 root = call_prom("peer", 1, 1, (phandle)0);
2721 if (root == (phandle)0)
2722 prom_panic ("couldn't get device tree root\n");
2724 /* Build header and make room for mem rsv map */
2725 mem_start = ALIGN(mem_start, 4);
2726 hdr = make_room(&mem_start, &mem_end,
2727 sizeof(struct boot_param_header), 4);
2728 dt_header_start = (unsigned long)hdr;
2729 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2731 /* Start of strings */
2732 mem_start = PAGE_ALIGN(mem_start);
2733 dt_string_start = mem_start;
2734 mem_start += 4; /* hole */
2736 /* Add "phandle" in there, we'll need it */
2737 namep = make_room(&mem_start, &mem_end, 16, 1);
2738 prom_strscpy_pad(namep, "phandle", sizeof("phandle"));
2739 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2741 /* Build string array */
2742 prom_printf("Building dt strings...\n");
2743 scan_dt_build_strings(root, &mem_start, &mem_end);
2744 dt_string_end = mem_start;
2746 /* Build structure */
2747 mem_start = PAGE_ALIGN(mem_start);
2748 dt_struct_start = mem_start;
2749 prom_printf("Building dt structure...\n");
2750 scan_dt_build_struct(root, &mem_start, &mem_end);
2751 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2752 dt_struct_end = PAGE_ALIGN(mem_start);
2755 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2756 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2757 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2758 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2759 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2760 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2761 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2762 hdr->version = cpu_to_be32(OF_DT_VERSION);
2763 /* Version 16 is not backward compatible */
2764 hdr->last_comp_version = cpu_to_be32(0x10);
2766 /* Copy the reserve map in */
2767 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2772 prom_printf("reserved memory map:\n");
2773 for (i = 0; i < mem_reserve_cnt; i++)
2774 prom_printf(" %llx - %llx\n",
2775 be64_to_cpu(mem_reserve_map[i].base),
2776 be64_to_cpu(mem_reserve_map[i].size));
2779 /* Bump mem_reserve_cnt to cause further reservations to fail
2780 * since it's too late.
2782 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2784 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2785 dt_string_start, dt_string_end);
2786 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2787 dt_struct_start, dt_struct_end);
2790 #ifdef CONFIG_PPC_MAPLE
2791 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2792 * The values are bad, and it doesn't even have the right number of cells. */
2793 static void __init fixup_device_tree_maple(void)
2796 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2800 name = "/ht@0/isa@4";
2801 isa = call_prom("finddevice", 1, 1, ADDR(name));
2802 if (!PHANDLE_VALID(isa)) {
2803 name = "/ht@0/isa@6";
2804 isa = call_prom("finddevice", 1, 1, ADDR(name));
2805 rloc = 0x01003000; /* IO space; PCI device = 6 */
2807 if (!PHANDLE_VALID(isa))
2810 if (prom_getproplen(isa, "ranges") != 12)
2812 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2816 if (isa_ranges[0] != 0x1 ||
2817 isa_ranges[1] != 0xf4000000 ||
2818 isa_ranges[2] != 0x00010000)
2821 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2823 isa_ranges[0] = 0x1;
2824 isa_ranges[1] = 0x0;
2825 isa_ranges[2] = rloc;
2826 isa_ranges[3] = 0x0;
2827 isa_ranges[4] = 0x0;
2828 isa_ranges[5] = 0x00010000;
2829 prom_setprop(isa, name, "ranges",
2830 isa_ranges, sizeof(isa_ranges));
2833 #define CPC925_MC_START 0xf8000000
2834 #define CPC925_MC_LENGTH 0x1000000
2835 /* The values for memory-controller don't have right number of cells */
2836 static void __init fixup_device_tree_maple_memory_controller(void)
2840 char *name = "/hostbridge@f8000000";
2843 mc = call_prom("finddevice", 1, 1, ADDR(name));
2844 if (!PHANDLE_VALID(mc))
2847 if (prom_getproplen(mc, "reg") != 8)
2850 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2851 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2852 if ((ac != 2) || (sc != 2))
2855 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2858 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2861 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2864 mc_reg[1] = CPC925_MC_START;
2866 mc_reg[3] = CPC925_MC_LENGTH;
2867 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2870 #define fixup_device_tree_maple()
2871 #define fixup_device_tree_maple_memory_controller()
2874 #ifdef CONFIG_PPC_CHRP
2876 * Pegasos and BriQ lacks the "ranges" property in the isa node
2877 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2878 * Pegasos has the IDE configured in legacy mode, but advertised as native
2880 static void __init fixup_device_tree_chrp(void)
2884 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2888 name = "/pci@80000000/isa@c";
2889 ph = call_prom("finddevice", 1, 1, ADDR(name));
2890 if (!PHANDLE_VALID(ph)) {
2891 name = "/pci@ff500000/isa@6";
2892 ph = call_prom("finddevice", 1, 1, ADDR(name));
2893 rloc = 0x01003000; /* IO space; PCI device = 6 */
2895 if (PHANDLE_VALID(ph)) {
2896 rc = prom_getproplen(ph, "ranges");
2897 if (rc == 0 || rc == PROM_ERROR) {
2898 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2905 prop[5] = 0x00010000;
2906 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2910 name = "/pci@80000000/ide@C,1";
2911 ph = call_prom("finddevice", 1, 1, ADDR(name));
2912 if (PHANDLE_VALID(ph)) {
2913 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2916 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2917 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2918 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2919 if (rc == sizeof(u32)) {
2921 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2926 #define fixup_device_tree_chrp()
2929 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2930 static void __init fixup_device_tree_pmac(void)
2932 phandle u3, i2c, mpic;
2937 /* Some G5s have a missing interrupt definition, fix it up here */
2938 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2939 if (!PHANDLE_VALID(u3))
2941 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2942 if (!PHANDLE_VALID(i2c))
2944 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2945 if (!PHANDLE_VALID(mpic))
2948 /* check if proper rev of u3 */
2949 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2952 if (u3_rev < 0x35 || u3_rev > 0x39)
2954 /* does it need fixup ? */
2955 if (prom_getproplen(i2c, "interrupts") > 0)
2958 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2960 /* interrupt on this revision of u3 is number 0 and level */
2963 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2964 &interrupts, sizeof(interrupts));
2966 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2967 &parent, sizeof(parent));
2970 #define fixup_device_tree_pmac()
2973 #ifdef CONFIG_PPC_EFIKA
2975 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2976 * to talk to the phy. If the phy-handle property is missing, then this
2977 * function is called to add the appropriate nodes and link it to the
2980 static void __init fixup_device_tree_efika_add_phy(void)
2986 /* Check if /builtin/ethernet exists - bail if it doesn't */
2987 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2988 if (!PHANDLE_VALID(node))
2991 /* Check if the phy-handle property exists - bail if it does */
2992 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2997 * At this point the ethernet device doesn't have a phy described.
2998 * Now we need to add the missing phy node and linkage
3001 /* Check for an MDIO bus node - if missing then create one */
3002 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
3003 if (!PHANDLE_VALID(node)) {
3004 prom_printf("Adding Ethernet MDIO node\n");
3005 call_prom("interpret", 1, 1,
3006 " s\" /builtin\" find-device"
3008 " 1 encode-int s\" #address-cells\" property"
3009 " 0 encode-int s\" #size-cells\" property"
3010 " s\" mdio\" device-name"
3011 " s\" fsl,mpc5200b-mdio\" encode-string"
3012 " s\" compatible\" property"
3013 " 0xf0003000 0x400 reg"
3015 " 0x5 encode-int encode+"
3016 " 0x3 encode-int encode+"
3017 " s\" interrupts\" property"
3021 /* Check for a PHY device node - if missing then create one and
3022 * give it's phandle to the ethernet node */
3023 node = call_prom("finddevice", 1, 1,
3024 ADDR("/builtin/mdio/ethernet-phy"));
3025 if (!PHANDLE_VALID(node)) {
3026 prom_printf("Adding Ethernet PHY node\n");
3027 call_prom("interpret", 1, 1,
3028 " s\" /builtin/mdio\" find-device"
3030 " s\" ethernet-phy\" device-name"
3031 " 0x10 encode-int s\" reg\" property"
3035 " s\" /builtin/ethernet\" find-device"
3037 " s\" phy-handle\" property"
3042 static void __init fixup_device_tree_efika(void)
3044 int sound_irq[3] = { 2, 2, 0 };
3045 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
3046 3,4,0, 3,5,0, 3,6,0, 3,7,0,
3047 3,8,0, 3,9,0, 3,10,0, 3,11,0,
3048 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
3053 /* Check if we're really running on a EFIKA */
3054 node = call_prom("finddevice", 1, 1, ADDR("/"));
3055 if (!PHANDLE_VALID(node))
3058 rv = prom_getprop(node, "model", prop, sizeof(prop));
3059 if (rv == PROM_ERROR)
3061 if (prom_strcmp(prop, "EFIKA5K2"))
3064 prom_printf("Applying EFIKA device tree fixups\n");
3066 /* Claiming to be 'chrp' is death */
3067 node = call_prom("finddevice", 1, 1, ADDR("/"));
3068 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3069 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3070 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3072 /* CODEGEN,description is exposed in /proc/cpuinfo so
3074 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3075 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3076 prom_setprop(node, "/", "CODEGEN,description",
3077 "Efika 5200B PowerPC System",
3078 sizeof("Efika 5200B PowerPC System"));
3080 /* Fixup bestcomm interrupts property */
3081 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3082 if (PHANDLE_VALID(node)) {
3083 len = prom_getproplen(node, "interrupts");
3085 prom_printf("Fixing bestcomm interrupts property\n");
3086 prom_setprop(node, "/builtin/bestcom", "interrupts",
3087 bcomm_irq, sizeof(bcomm_irq));
3091 /* Fixup sound interrupts property */
3092 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3093 if (PHANDLE_VALID(node)) {
3094 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3095 if (rv == PROM_ERROR) {
3096 prom_printf("Adding sound interrupts property\n");
3097 prom_setprop(node, "/builtin/sound", "interrupts",
3098 sound_irq, sizeof(sound_irq));
3102 /* Make sure ethernet phy-handle property exists */
3103 fixup_device_tree_efika_add_phy();
3106 #define fixup_device_tree_efika()
3109 #ifdef CONFIG_PPC_PASEMI_NEMO
3111 * CFE supplied on Nemo is broken in several ways, biggest
3112 * problem is that it reassigns ISA interrupts to unused mpic ints.
3113 * Add an interrupt-controller property for the io-bridge to use
3114 * and correct the ints so we can attach them to an irq_domain
3116 static void __init fixup_device_tree_pasemi(void)
3118 u32 interrupts[2], parent, rval, val = 0;
3119 char *name, *pci_name;
3122 /* Find the root pci node */
3123 name = "/pxp@0,e0000000";
3124 iob = call_prom("finddevice", 1, 1, ADDR(name));
3125 if (!PHANDLE_VALID(iob))
3128 /* check if interrupt-controller node set yet */
3129 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3132 prom_printf("adding interrupt-controller property for SB600...\n");
3134 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3136 pci_name = "/pxp@0,e0000000/pci@11";
3137 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3140 for( ; prom_next_node(&node); ) {
3141 /* scan each node for one with an interrupt */
3142 if (!PHANDLE_VALID(node))
3145 rval = prom_getproplen(node, "interrupts");
3146 if (rval == 0 || rval == PROM_ERROR)
3149 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3150 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3153 /* found a node, update both interrupts and interrupt-parent */
3154 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3155 interrupts[0] -= 203;
3156 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3157 interrupts[0] -= 213;
3158 if (interrupts[0] == 221)
3160 if (interrupts[0] == 222)
3163 prom_setprop(node, pci_name, "interrupts", interrupts,
3164 sizeof(interrupts));
3165 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3170 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3171 * so that generic isa-bridge code can add the SB600 and its on-board
3174 name = "/pxp@0,e0000000/io-bridge@0";
3175 iob = call_prom("finddevice", 1, 1, ADDR(name));
3176 if (!PHANDLE_VALID(iob))
3179 /* device_type is already set, just change it. */
3181 prom_printf("Changing device_type of SB600 node...\n");
3183 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3185 #else /* !CONFIG_PPC_PASEMI_NEMO */
3186 static inline void fixup_device_tree_pasemi(void) { }
3189 static void __init fixup_device_tree(void)
3191 fixup_device_tree_maple();
3192 fixup_device_tree_maple_memory_controller();
3193 fixup_device_tree_chrp();
3194 fixup_device_tree_pmac();
3195 fixup_device_tree_efika();
3196 fixup_device_tree_pasemi();
3199 static void __init prom_find_boot_cpu(void)
3206 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3208 prom_cpu = be32_to_cpu(rval);
3210 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3212 if (!PHANDLE_VALID(cpu_pkg))
3215 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3216 prom.cpu = be32_to_cpu(rval);
3218 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3221 static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3223 #ifdef CONFIG_BLK_DEV_INITRD
3224 if (r3 && r4 && r4 != 0xdeadbeef) {
3227 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3228 prom_initrd_end = prom_initrd_start + r4;
3230 val = cpu_to_be64(prom_initrd_start);
3231 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3233 val = cpu_to_be64(prom_initrd_end);
3234 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3237 reserve_mem(prom_initrd_start,
3238 prom_initrd_end - prom_initrd_start);
3240 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3241 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3243 #endif /* CONFIG_BLK_DEV_INITRD */
3246 #ifdef CONFIG_PPC_SVM
3248 * Perform the Enter Secure Mode ultracall.
3250 static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
3252 register unsigned long r3 asm("r3") = UV_ESM;
3253 register unsigned long r4 asm("r4") = kbase;
3254 register unsigned long r5 asm("r5") = fdt;
3256 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3262 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3264 static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3268 if (!prom_svm_enable)
3271 /* Switch to secure mode. */
3272 prom_printf("Switching to secure mode.\n");
3275 * The ultravisor will do an integrity check of the kernel image but we
3276 * relocated it so the check will fail. Restore the original image by
3277 * relocating it back to the kernel virtual base address.
3279 relocate(KERNELBASE);
3281 ret = enter_secure_mode(kbase, fdt);
3283 /* Relocate the kernel again. */
3286 if (ret != U_SUCCESS) {
3287 prom_printf("Returned %d from switching to secure mode.\n", ret);
3288 prom_rtas_os_term("Switch to secure mode failed.\n");
3292 static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3295 #endif /* CONFIG_PPC_SVM */
3298 * We enter here early on, when the Open Firmware prom is still
3299 * handling exceptions and the MMU hash table for us.
3302 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3304 unsigned long r6, unsigned long r7,
3305 unsigned long kbase)
3310 unsigned long offset = reloc_offset();
3315 * First zero the BSS
3317 memset(&__bss_start, 0, __bss_stop - __bss_start);
3320 * Init interface to Open Firmware, get some node references,
3323 prom_init_client_services(pp);
3326 * See if this OF is old enough that we need to do explicit maps
3327 * and other workarounds
3332 * Init prom stdout device
3336 prom_printf("Preparing to boot %s", linux_banner);
3339 * Get default machine type. At this point, we do not differentiate
3340 * between pSeries SMP and pSeries LPAR
3342 of_platform = prom_find_machine_type();
3343 prom_printf("Detected machine type: %x\n", of_platform);
3345 #ifndef CONFIG_NONSTATIC_KERNEL
3346 /* Bail if this is a kdump kernel. */
3347 if (PHYSICAL_START > 0)
3348 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3352 * Check for an initrd
3354 prom_check_initrd(r3, r4);
3357 * Do early parsing of command line
3359 early_cmdline_parse();
3361 #ifdef CONFIG_PPC_PSERIES
3363 * On pSeries, inform the firmware about our capabilities
3365 if (of_platform == PLATFORM_PSERIES ||
3366 of_platform == PLATFORM_PSERIES_LPAR)
3367 prom_send_capabilities();
3371 * Copy the CPU hold code
3373 if (of_platform != PLATFORM_POWERMAC)
3374 copy_and_flush(0, kbase, 0x100, 0);
3377 * Initialize memory management within prom_init
3382 * Determine which cpu is actually running right _now_
3384 prom_find_boot_cpu();
3387 * Initialize display devices
3389 prom_check_displays();
3391 #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3393 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3394 * that uses the allocator, we need to make sure we get the top of memory
3395 * available for us here...
3397 if (of_platform == PLATFORM_PSERIES)
3398 prom_initialize_tce_table();
3402 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3403 * have a usable RTAS implementation.
3405 if (of_platform != PLATFORM_POWERMAC)
3406 prom_instantiate_rtas();
3409 /* instantiate sml */
3410 prom_instantiate_sml();
3414 * On non-powermacs, put all CPUs in spin-loops.
3416 * PowerMacs use a different mechanism to spin CPUs
3418 * (This must be done after instanciating RTAS)
3420 if (of_platform != PLATFORM_POWERMAC)
3424 * Fill in some infos for use by the kernel later on
3426 if (prom_memory_limit) {
3427 __be64 val = cpu_to_be64(prom_memory_limit);
3428 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3433 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3436 if (prom_iommu_force_on)
3437 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3440 if (prom_tce_alloc_start) {
3441 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3442 &prom_tce_alloc_start,
3443 sizeof(prom_tce_alloc_start));
3444 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3445 &prom_tce_alloc_end,
3446 sizeof(prom_tce_alloc_end));
3451 * Fixup any known bugs in the device-tree
3453 fixup_device_tree();
3456 * Now finally create the flattened device-tree
3458 prom_printf("copying OF device tree...\n");
3459 flatten_device_tree();
3462 * in case stdin is USB and still active on IBM machines...
3463 * Unfortunately quiesce crashes on some powermacs if we have
3464 * closed stdin already (in particular the powerbook 101).
3466 if (of_platform != PLATFORM_POWERMAC)
3470 * Call OF "quiesce" method to shut down pending DMA's from
3473 prom_printf("Quiescing Open Firmware ...\n");
3474 call_prom("quiesce", 0, 0);
3477 * And finally, call the kernel passing it the flattened device
3478 * tree and NULL as r5, thus triggering the new entry point which
3479 * is common to us and kexec
3481 hdr = dt_header_start;
3483 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3484 prom_debug("->dt_header_start=0x%lx\n", hdr);
3487 reloc_got2(-offset);
3490 /* Move to secure memory if we're supposed to be secure guests. */
3491 setup_secure_guest(kbase, hdr);
3493 __start(hdr, kbase, 0, 0, 0, 0, 0);