2 * Definitions and wrapper functions for kernel decompressor
4 * (C) 2017 Helge Deller <deller@gmx.de>
7 #include <linux/uaccess.h>
8 #include <asm/unaligned.h>
18 #define memmove memmove
19 #define memzero(s, n) memset((s), 0, (n))
21 #define malloc malloc_gzip
22 #define free free_gzip
24 /* Symbols defined by linker scripts */
25 extern char input_data[];
27 extern __le32 output_len; /* at unaligned address, little-endian */
28 extern char _text, _end;
29 extern char _bss, _ebss;
30 extern char _startcode_end;
31 extern void startup_continue(void *entry, unsigned long cmdline,
32 unsigned long rd_start, unsigned long rd_end) __noreturn;
34 void error(char *m) __noreturn;
36 static unsigned long free_mem_ptr;
37 static unsigned long free_mem_end_ptr;
39 #ifdef CONFIG_KERNEL_GZIP
40 #include "../../../../lib/decompress_inflate.c"
43 #ifdef CONFIG_KERNEL_BZIP2
44 #include "../../../../lib/decompress_bunzip2.c"
47 #ifdef CONFIG_KERNEL_LZ4
48 #include "../../../../lib/decompress_unlz4.c"
51 #ifdef CONFIG_KERNEL_LZMA
52 #include "../../../../lib/decompress_unlzma.c"
55 #ifdef CONFIG_KERNEL_LZO
56 #include "../../../../lib/decompress_unlzo.c"
59 #ifdef CONFIG_KERNEL_XZ
60 #include "../../../../lib/decompress_unxz.c"
63 void *memmove(void *dest, const void *src, size_t n)
80 void *memset(void *s, int c, size_t count)
89 void *memcpy(void *d, const void *s, size_t len)
91 char *dest = (char *)d;
92 const char *source = (const char *)s;
99 size_t strlen(const char *s)
103 for (sc = s; *sc != '\0'; ++sc)
108 char *strchr(const char *s, int c)
118 int puts(const char *s)
120 const char *nuline = s;
122 while ((nuline = strchr(s, '\n')) != NULL) {
124 pdc_iodc_print(s, nuline - s);
125 pdc_iodc_print("\r\n", 2);
129 pdc_iodc_print(s, strlen(s));
134 static int putchar(int c)
144 void __noreturn error(char *x)
148 puts("\n\n -- System halted");
149 while (1) /* wait forever */
153 static int print_hex(unsigned long num)
155 const char hex[] = "0123456789abcdef";
157 int i = sizeof(str)-1;
161 str[i--] = hex[num & 0x0f];
172 int printf(const char *fmt, ...)
189 print_hex(va_arg(args, unsigned long));
196 /* helper functions for libgcc */
203 void *malloc(size_t size)
205 return malloc_gzip(size);
211 return free_gzip(ptr);
215 static void flush_data_cache(char *start, unsigned long length)
217 char *end = start + length;
220 asm volatile("fdc 0(%0)" : : "r" (start));
221 asm volatile("fic 0(%%sr0,%0)" : : "r" (start));
223 } while (start < end);
224 asm volatile("fdc 0(%0)" : : "r" (end));
229 unsigned long decompress_kernel(unsigned int started_wide,
230 unsigned int command_line,
231 const unsigned int rd_start,
232 const unsigned int rd_end)
235 unsigned long len, len_all;
238 parisc_narrow_firmware = 0;
241 set_firmware_width_unlocked();
243 putchar('U'); /* if you get this p and no more, string storage */
244 /* in $GLOBAL$ is wrong or %dp is wrong */
245 puts("ncompressing ...\n");
247 output = (char *) KERNEL_BINARY_TEXT_START;
248 len_all = __pa(SZ_end) - __pa(SZparisc_kernel_start);
250 if ((unsigned long) &_startcode_end > (unsigned long) output)
251 error("Bootcode overlaps kernel code");
253 len = get_unaligned_le32(&output_len);
255 error("Output len too big.");
257 memset(&output[len], 0, len_all - len);
260 * Initialize free_mem_ptr and free_mem_end_ptr.
262 free_mem_ptr = (unsigned long) &_ebss;
263 free_mem_ptr += 2*1024*1024; /* leave 2 MB for stack */
265 /* Limit memory for bootoader to 1GB */
266 #define ARTIFICIAL_LIMIT (1*1024*1024*1024)
267 free_mem_end_ptr = PAGE0->imm_max_mem;
268 if (free_mem_end_ptr > ARTIFICIAL_LIMIT)
269 free_mem_end_ptr = ARTIFICIAL_LIMIT;
271 #ifdef CONFIG_BLK_DEV_INITRD
272 /* if we have ramdisk this is at end of memory */
273 if (rd_start && rd_start < free_mem_end_ptr)
274 free_mem_end_ptr = rd_start;
278 printf("startcode_end = %x\n", &_startcode_end);
279 printf("commandline = %x\n", command_line);
280 printf("rd_start = %x\n", rd_start);
281 printf("rd_end = %x\n", rd_end);
283 printf("free_ptr = %x\n", free_mem_ptr);
284 printf("free_ptr_end = %x\n", free_mem_end_ptr);
286 printf("input_data = %x\n", input_data);
287 printf("input_len = %x\n", input_len);
288 printf("output = %x\n", output);
289 printf("output_len = %x\n", len);
290 printf("output_max = %x\n", len_all);
293 __decompress(input_data, input_len, NULL, NULL,
294 output, 0, NULL, error);
296 flush_data_cache(output, len);
298 printf("Booting kernel ...\n\n");
300 return (unsigned long) output;