1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/parisc/kernel/firmware.c - safe PDC access routines
5 * PDC == Processor Dependent Code
7 * See http://www.parisc-linux.org/documentation/index.html
8 * for documentation describing the entry points and calling
9 * conventions defined below.
11 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
12 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
13 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
14 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
15 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
18 /* I think it would be in everyone's best interest to follow this
19 * guidelines when writing PDC wrappers:
21 * - the name of the pdc wrapper should match one of the macros
22 * used for the first two arguments
23 * - don't use caps for random parts of the name
24 * - use the static PDC result buffers and "copyout" to structs
25 * supplied by the caller to encapsulate alignment restrictions
26 * - hold pdc_lock while in PDC or using static result buffers
27 * - use __pa() to convert virtual (kernel) pointers to physical
29 * - the name of the struct used for pdc return values should equal
30 * one of the macros used for the first two arguments to the
31 * corresponding PDC call
32 * - keep the order of arguments
33 * - don't be smart (setting trailing NUL bytes for strings, return
34 * something useful even if the call failed) unless you are sure
35 * it's not going to affect functionality or performance
38 * int pdc_cache_info(struct pdc_cache_info *cache_info )
42 * spin_lock_irq(&pdc_lock);
43 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
44 * convert_to_wide(pdc_result);
45 * memcpy(cache_info, pdc_result, sizeof(*cache_info));
46 * spin_unlock_irq(&pdc_lock);
55 #include <linux/delay.h>
56 #include <linux/init.h>
57 #include <linux/kernel.h>
58 #include <linux/module.h>
59 #include <linux/string.h>
60 #include <linux/spinlock.h>
64 #include <asm/pdcpat.h>
65 #include <asm/processor.h> /* for boot_cpu_data */
67 #if defined(BOOTLOADER)
68 # undef spin_lock_irqsave
69 # define spin_lock_irqsave(a, b) { b = 1; }
70 # undef spin_unlock_irqrestore
71 # define spin_unlock_irqrestore(a, b)
73 static DEFINE_SPINLOCK(pdc_lock);
76 extern unsigned long pdc_result[NUM_PDC_RESULT];
77 extern unsigned long pdc_result2[NUM_PDC_RESULT];
80 #define WIDE_FIRMWARE 0x1
81 #define NARROW_FIRMWARE 0x2
83 /* Firmware needs to be initially set to narrow to determine the
84 * actual firmware width. */
85 int parisc_narrow_firmware __ro_after_init = 1;
88 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
89 * and MEM_PDC calls are always the same width as the OS.
90 * Some PAT boxes may have 64-bit IODC I/O.
92 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
93 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
94 * This allowed wide kernels to run on Cxxx boxes.
95 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
96 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
100 long real64_call(unsigned long function, ...);
102 long real32_call(unsigned long function, ...);
105 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
106 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
108 # define MEM_PDC (unsigned long)PAGE0->mem_pdc
109 # define mem_pdc_call(args...) real32_call(MEM_PDC, args)
114 * f_extend - Convert PDC addresses to kernel addresses.
115 * @address: Address returned from PDC.
117 * This function is used to convert PDC addresses into kernel addresses
118 * when the PDC address size and kernel address size are different.
120 static unsigned long f_extend(unsigned long address)
123 if(unlikely(parisc_narrow_firmware)) {
124 if((address & 0xff000000) == 0xf0000000)
125 return 0xf0f0f0f000000000UL | (u32)address;
127 if((address & 0xf0000000) == 0xf0000000)
128 return 0xffffffff00000000UL | (u32)address;
135 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
136 * @address: The return buffer from PDC.
138 * This function is used to convert the return buffer addresses retrieved from PDC
139 * into kernel addresses when the PDC address size and kernel address size are
142 static void convert_to_wide(unsigned long *addr)
146 unsigned int *p = (unsigned int *)addr;
148 if (unlikely(parisc_narrow_firmware)) {
149 for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
156 void set_firmware_width_unlocked(void)
160 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
161 __pa(pdc_result), 0);
162 convert_to_wide(pdc_result);
163 if (pdc_result[0] != NARROW_FIRMWARE)
164 parisc_narrow_firmware = 0;
168 * set_firmware_width - Determine if the firmware is wide or narrow.
170 * This function must be called before any pdc_* function that uses the
171 * convert_to_wide function.
173 void set_firmware_width(void)
176 spin_lock_irqsave(&pdc_lock, flags);
177 set_firmware_width_unlocked();
178 spin_unlock_irqrestore(&pdc_lock, flags);
181 void set_firmware_width_unlocked(void)
186 void set_firmware_width(void)
190 #endif /*CONFIG_64BIT*/
193 #if !defined(BOOTLOADER)
195 * pdc_emergency_unlock - Unlock the linux pdc lock
197 * This call unlocks the linux pdc lock in case we need some PDC functions
198 * (like pdc_add_valid) during kernel stack dump.
200 void pdc_emergency_unlock(void)
202 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
203 if (spin_is_locked(&pdc_lock))
204 spin_unlock(&pdc_lock);
209 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
210 * @address: Address to be verified.
212 * This PDC call attempts to read from the specified address and verifies
213 * if the address is valid.
215 * The return value is PDC_OK (0) in case accessing this address is valid.
217 int pdc_add_valid(unsigned long address)
222 spin_lock_irqsave(&pdc_lock, flags);
223 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
224 spin_unlock_irqrestore(&pdc_lock, flags);
228 EXPORT_SYMBOL(pdc_add_valid);
231 * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
232 * @instr: Pointer to variable which will get instruction opcode.
234 * The return value is PDC_OK (0) in case call succeeded.
236 int __init pdc_instr(unsigned int *instr)
241 spin_lock_irqsave(&pdc_lock, flags);
242 retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
243 convert_to_wide(pdc_result);
244 *instr = pdc_result[0];
245 spin_unlock_irqrestore(&pdc_lock, flags);
251 * pdc_chassis_info - Return chassis information.
252 * @result: The return buffer.
253 * @chassis_info: The memory buffer address.
254 * @len: The size of the memory buffer address.
256 * An HVERSION dependent call for returning the chassis information.
258 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
263 spin_lock_irqsave(&pdc_lock, flags);
264 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
265 memcpy(&pdc_result2, led_info, len);
266 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
267 __pa(pdc_result), __pa(pdc_result2), len);
268 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
269 memcpy(led_info, pdc_result2, len);
270 spin_unlock_irqrestore(&pdc_lock, flags);
276 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
277 * @retval: -1 on error, 0 on success. Other value are PDC errors
279 * Must be correctly formatted or expect system crash
282 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
290 spin_lock_irqsave(&pdc_lock, flags);
291 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
292 spin_unlock_irqrestore(&pdc_lock, flags);
299 * pdc_chassis_disp - Updates chassis code
300 * @retval: -1 on error, 0 on success
302 int pdc_chassis_disp(unsigned long disp)
307 spin_lock_irqsave(&pdc_lock, flags);
308 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
309 spin_unlock_irqrestore(&pdc_lock, flags);
315 * pdc_chassis_warn - Fetches chassis warnings
316 * @retval: -1 on error, 0 on success
318 int pdc_chassis_warn(unsigned long *warn)
323 spin_lock_irqsave(&pdc_lock, flags);
324 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
325 *warn = pdc_result[0];
326 spin_unlock_irqrestore(&pdc_lock, flags);
331 int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
335 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
336 convert_to_wide(pdc_result);
337 pdc_coproc_info->ccr_functional = pdc_result[0];
338 pdc_coproc_info->ccr_present = pdc_result[1];
339 pdc_coproc_info->revision = pdc_result[17];
340 pdc_coproc_info->model = pdc_result[18];
346 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
347 * @pdc_coproc_info: Return buffer address.
349 * This PDC call returns the presence and status of all the coprocessors
350 * attached to the processor.
352 int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
357 spin_lock_irqsave(&pdc_lock, flags);
358 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
359 spin_unlock_irqrestore(&pdc_lock, flags);
365 * pdc_iodc_read - Read data from the modules IODC.
366 * @actcnt: The actual number of bytes.
367 * @hpa: The HPA of the module for the iodc read.
368 * @index: The iodc entry point.
369 * @iodc_data: A buffer memory for the iodc options.
370 * @iodc_data_size: Size of the memory buffer.
372 * This PDC call reads from the IODC of the module specified by the hpa
375 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
376 void *iodc_data, unsigned int iodc_data_size)
381 spin_lock_irqsave(&pdc_lock, flags);
382 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
383 index, __pa(pdc_result2), iodc_data_size);
384 convert_to_wide(pdc_result);
385 *actcnt = pdc_result[0];
386 memcpy(iodc_data, pdc_result2, iodc_data_size);
387 spin_unlock_irqrestore(&pdc_lock, flags);
391 EXPORT_SYMBOL(pdc_iodc_read);
394 * pdc_system_map_find_mods - Locate unarchitected modules.
395 * @pdc_mod_info: Return buffer address.
396 * @mod_path: pointer to dev path structure.
397 * @mod_index: fixed address module index.
399 * To locate and identify modules which reside at fixed I/O addresses, which
400 * do not self-identify via architected bus walks.
402 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
403 struct pdc_module_path *mod_path, long mod_index)
408 spin_lock_irqsave(&pdc_lock, flags);
409 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
410 __pa(pdc_result2), mod_index);
411 convert_to_wide(pdc_result);
412 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
413 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
414 spin_unlock_irqrestore(&pdc_lock, flags);
416 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
421 * pdc_system_map_find_addrs - Retrieve additional address ranges.
422 * @pdc_addr_info: Return buffer address.
423 * @mod_index: Fixed address module index.
424 * @addr_index: Address range index.
426 * Retrieve additional information about subsequent address ranges for modules
427 * with multiple address ranges.
429 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
430 long mod_index, long addr_index)
435 spin_lock_irqsave(&pdc_lock, flags);
436 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
437 mod_index, addr_index);
438 convert_to_wide(pdc_result);
439 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
440 spin_unlock_irqrestore(&pdc_lock, flags);
442 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
447 * pdc_model_info - Return model information about the processor.
448 * @model: The return buffer.
450 * Returns the version numbers, identifiers, and capabilities from the processor module.
452 int pdc_model_info(struct pdc_model *model)
457 spin_lock_irqsave(&pdc_lock, flags);
458 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
459 convert_to_wide(pdc_result);
460 memcpy(model, pdc_result, sizeof(*model));
461 spin_unlock_irqrestore(&pdc_lock, flags);
467 * pdc_model_sysmodel - Get the system model name.
468 * @name: A char array of at least 81 characters.
470 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
471 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
474 int pdc_model_sysmodel(char *name)
479 spin_lock_irqsave(&pdc_lock, flags);
480 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
481 OS_ID_HPUX, __pa(name));
482 convert_to_wide(pdc_result);
484 if (retval == PDC_OK) {
485 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
489 spin_unlock_irqrestore(&pdc_lock, flags);
495 * pdc_model_versions - Identify the version number of each processor.
496 * @cpu_id: The return buffer.
497 * @id: The id of the processor to check.
499 * Returns the version number for each processor component.
501 * This comment was here before, but I do not know what it means :( -RB
502 * id: 0 = cpu revision, 1 = boot-rom-version
504 int pdc_model_versions(unsigned long *versions, int id)
509 spin_lock_irqsave(&pdc_lock, flags);
510 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
511 convert_to_wide(pdc_result);
512 *versions = pdc_result[0];
513 spin_unlock_irqrestore(&pdc_lock, flags);
519 * pdc_model_cpuid - Returns the CPU_ID.
520 * @cpu_id: The return buffer.
522 * Returns the CPU_ID value which uniquely identifies the cpu portion of
523 * the processor module.
525 int pdc_model_cpuid(unsigned long *cpu_id)
530 spin_lock_irqsave(&pdc_lock, flags);
531 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
532 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
533 convert_to_wide(pdc_result);
534 *cpu_id = pdc_result[0];
535 spin_unlock_irqrestore(&pdc_lock, flags);
541 * pdc_model_capabilities - Returns the platform capabilities.
542 * @capabilities: The return buffer.
544 * Returns information about platform support for 32- and/or 64-bit
545 * OSes, IO-PDIR coherency, and virtual aliasing.
547 int pdc_model_capabilities(unsigned long *capabilities)
552 spin_lock_irqsave(&pdc_lock, flags);
553 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
554 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
555 convert_to_wide(pdc_result);
556 if (retval == PDC_OK) {
557 *capabilities = pdc_result[0];
559 *capabilities = PDC_MODEL_OS32;
561 spin_unlock_irqrestore(&pdc_lock, flags);
567 * pdc_model_platform_info - Returns machine product and serial number.
568 * @orig_prod_num: Return buffer for original product number.
569 * @current_prod_num: Return buffer for current product number.
570 * @serial_no: Return buffer for serial number.
572 * Returns strings containing the original and current product numbers and the
573 * serial number of the system.
575 int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num,
581 spin_lock_irqsave(&pdc_lock, flags);
582 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO,
583 __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no));
584 convert_to_wide(pdc_result);
585 spin_unlock_irqrestore(&pdc_lock, flags);
591 * pdc_cache_info - Return cache and TLB information.
592 * @cache_info: The return buffer.
594 * Returns information about the processor's cache and TLB.
596 int pdc_cache_info(struct pdc_cache_info *cache_info)
601 spin_lock_irqsave(&pdc_lock, flags);
602 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
603 convert_to_wide(pdc_result);
604 memcpy(cache_info, pdc_result, sizeof(*cache_info));
605 spin_unlock_irqrestore(&pdc_lock, flags);
611 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
612 * @space_bits: Should be 0, if not, bad mojo!
614 * Returns information about Space ID hashing.
616 int pdc_spaceid_bits(unsigned long *space_bits)
621 spin_lock_irqsave(&pdc_lock, flags);
623 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
624 convert_to_wide(pdc_result);
625 *space_bits = pdc_result[0];
626 spin_unlock_irqrestore(&pdc_lock, flags);
633 * pdc_btlb_info - Return block TLB information.
634 * @btlb: The return buffer.
636 * Returns information about the hardware Block TLB.
638 int pdc_btlb_info(struct pdc_btlb_info *btlb)
643 spin_lock_irqsave(&pdc_lock, flags);
644 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
645 memcpy(btlb, pdc_result, sizeof(*btlb));
646 spin_unlock_irqrestore(&pdc_lock, flags);
655 * pdc_mem_map_hpa - Find fixed module information.
656 * @address: The return buffer
657 * @mod_path: pointer to dev path structure.
659 * This call was developed for S700 workstations to allow the kernel to find
660 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
661 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
664 * This call is supported by all existing S700 workstations (up to Gecko).
666 int pdc_mem_map_hpa(struct pdc_memory_map *address,
667 struct pdc_module_path *mod_path)
672 spin_lock_irqsave(&pdc_lock, flags);
673 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
674 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
676 memcpy(address, pdc_result, sizeof(*address));
677 spin_unlock_irqrestore(&pdc_lock, flags);
681 #endif /* !CONFIG_PA20 */
684 * pdc_lan_station_id - Get the LAN address.
685 * @lan_addr: The return buffer.
686 * @hpa: The network device HPA.
688 * Get the LAN station address when it is not directly available from the LAN hardware.
690 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
695 spin_lock_irqsave(&pdc_lock, flags);
696 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
697 __pa(pdc_result), hpa);
699 /* FIXME: else read MAC from NVRAM */
700 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
702 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
704 spin_unlock_irqrestore(&pdc_lock, flags);
708 EXPORT_SYMBOL(pdc_lan_station_id);
711 * pdc_stable_read - Read data from Stable Storage.
712 * @staddr: Stable Storage address to access.
713 * @memaddr: The memory address where Stable Storage data shall be copied.
714 * @count: number of bytes to transfer. count is multiple of 4.
716 * This PDC call reads from the Stable Storage address supplied in staddr
717 * and copies count bytes to the memory address memaddr.
718 * The call will fail if staddr+count > PDC_STABLE size.
720 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
725 spin_lock_irqsave(&pdc_lock, flags);
726 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
727 __pa(pdc_result), count);
728 convert_to_wide(pdc_result);
729 memcpy(memaddr, pdc_result, count);
730 spin_unlock_irqrestore(&pdc_lock, flags);
734 EXPORT_SYMBOL(pdc_stable_read);
737 * pdc_stable_write - Write data to Stable Storage.
738 * @staddr: Stable Storage address to access.
739 * @memaddr: The memory address where Stable Storage data shall be read from.
740 * @count: number of bytes to transfer. count is multiple of 4.
742 * This PDC call reads count bytes from the supplied memaddr address,
743 * and copies count bytes to the Stable Storage address staddr.
744 * The call will fail if staddr+count > PDC_STABLE size.
746 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
751 spin_lock_irqsave(&pdc_lock, flags);
752 memcpy(pdc_result, memaddr, count);
753 convert_to_wide(pdc_result);
754 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
755 __pa(pdc_result), count);
756 spin_unlock_irqrestore(&pdc_lock, flags);
760 EXPORT_SYMBOL(pdc_stable_write);
763 * pdc_stable_get_size - Get Stable Storage size in bytes.
764 * @size: pointer where the size will be stored.
766 * This PDC call returns the number of bytes in the processor's Stable
767 * Storage, which is the number of contiguous bytes implemented in Stable
768 * Storage starting from staddr=0. size in an unsigned 64-bit integer
769 * which is a multiple of four.
771 int pdc_stable_get_size(unsigned long *size)
776 spin_lock_irqsave(&pdc_lock, flags);
777 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
778 *size = pdc_result[0];
779 spin_unlock_irqrestore(&pdc_lock, flags);
783 EXPORT_SYMBOL(pdc_stable_get_size);
786 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
788 * This PDC call is meant to be used to check the integrity of the current
789 * contents of Stable Storage.
791 int pdc_stable_verify_contents(void)
796 spin_lock_irqsave(&pdc_lock, flags);
797 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
798 spin_unlock_irqrestore(&pdc_lock, flags);
802 EXPORT_SYMBOL(pdc_stable_verify_contents);
805 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
806 * the validity indicator.
808 * This PDC call will erase all contents of Stable Storage. Use with care!
810 int pdc_stable_initialize(void)
815 spin_lock_irqsave(&pdc_lock, flags);
816 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
817 spin_unlock_irqrestore(&pdc_lock, flags);
821 EXPORT_SYMBOL(pdc_stable_initialize);
824 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
825 * @hwpath: fully bc.mod style path to the device.
826 * @initiator: the array to return the result into
828 * Get the SCSI operational parameters from PDC.
829 * Needed since HPUX never used BIOS or symbios card NVRAM.
830 * Most ncr/sym cards won't have an entry and just use whatever
831 * capabilities of the card are (eg Ultra, LVD). But there are
832 * several cases where it's useful:
833 * o set SCSI id for Multi-initiator clusters,
834 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
835 * o bus width exported is less than what the interface chip supports.
837 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
842 spin_lock_irqsave(&pdc_lock, flags);
844 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
845 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
846 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
848 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
849 __pa(pdc_result), __pa(hwpath));
853 if (pdc_result[0] < 16) {
854 initiator->host_id = pdc_result[0];
856 initiator->host_id = -1;
860 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
861 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
863 switch (pdc_result[1]) {
864 case 1: initiator->factor = 50; break;
865 case 2: initiator->factor = 25; break;
866 case 5: initiator->factor = 12; break;
867 case 25: initiator->factor = 10; break;
868 case 20: initiator->factor = 12; break;
869 case 40: initiator->factor = 10; break;
870 default: initiator->factor = -1; break;
873 if (IS_SPROCKETS()) {
874 initiator->width = pdc_result[4];
875 initiator->mode = pdc_result[5];
877 initiator->width = -1;
878 initiator->mode = -1;
882 spin_unlock_irqrestore(&pdc_lock, flags);
884 return (retval >= PDC_OK);
886 EXPORT_SYMBOL(pdc_get_initiator);
890 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
891 * @num_entries: The return value.
892 * @hpa: The HPA for the device.
894 * This PDC function returns the number of entries in the specified cell's
896 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
898 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
903 spin_lock_irqsave(&pdc_lock, flags);
904 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
905 __pa(pdc_result), hpa);
906 convert_to_wide(pdc_result);
907 *num_entries = pdc_result[0];
908 spin_unlock_irqrestore(&pdc_lock, flags);
914 * pdc_pci_irt - Get the PCI interrupt routing table.
915 * @num_entries: The number of entries in the table.
916 * @hpa: The Hard Physical Address of the device.
919 * Get the PCI interrupt routing table for the device at the given HPA.
920 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
922 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
927 BUG_ON((unsigned long)tbl & 0x7);
929 spin_lock_irqsave(&pdc_lock, flags);
930 pdc_result[0] = num_entries;
931 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
932 __pa(pdc_result), hpa, __pa(tbl));
933 spin_unlock_irqrestore(&pdc_lock, flags);
939 #if 0 /* UNTEST CODE - left here in case someone needs it */
942 * pdc_pci_config_read - read PCI config space.
943 * @hpa token from PDC to indicate which PCI device
944 * @pci_addr configuration space address to read from
946 * Read PCI Configuration space *before* linux PCI subsystem is running.
948 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
953 spin_lock_irqsave(&pdc_lock, flags);
956 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
957 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
958 spin_unlock_irqrestore(&pdc_lock, flags);
960 return retval ? ~0 : (unsigned int) pdc_result[0];
965 * pdc_pci_config_write - read PCI config space.
966 * @hpa token from PDC to indicate which PCI device
967 * @pci_addr configuration space address to write
968 * @val value we want in the 32-bit register
970 * Write PCI Configuration space *before* linux PCI subsystem is running.
972 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
977 spin_lock_irqsave(&pdc_lock, flags);
979 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
980 __pa(pdc_result), hpa,
981 cfg_addr&~3UL, 4UL, (unsigned long) val);
982 spin_unlock_irqrestore(&pdc_lock, flags);
986 #endif /* UNTESTED CODE */
989 * pdc_tod_read - Read the Time-Of-Day clock.
990 * @tod: The return buffer:
992 * Read the Time-Of-Day clock
994 int pdc_tod_read(struct pdc_tod *tod)
999 spin_lock_irqsave(&pdc_lock, flags);
1000 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
1001 convert_to_wide(pdc_result);
1002 memcpy(tod, pdc_result, sizeof(*tod));
1003 spin_unlock_irqrestore(&pdc_lock, flags);
1007 EXPORT_SYMBOL(pdc_tod_read);
1009 int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo)
1012 unsigned long flags;
1014 spin_lock_irqsave(&pdc_lock, flags);
1015 retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0);
1016 convert_to_wide(pdc_result);
1017 memcpy(rinfo, pdc_result, sizeof(*rinfo));
1018 spin_unlock_irqrestore(&pdc_lock, flags);
1023 int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
1024 unsigned long *pdt_entries_ptr)
1027 unsigned long flags;
1029 spin_lock_irqsave(&pdc_lock, flags);
1030 retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
1031 __pa(pdt_entries_ptr));
1032 if (retval == PDC_OK) {
1033 convert_to_wide(pdc_result);
1034 memcpy(pret, pdc_result, sizeof(*pret));
1036 spin_unlock_irqrestore(&pdc_lock, flags);
1040 * 64-bit kernels should not call this PDT function in narrow mode.
1041 * The pdt_entries_ptr array above will now contain 32-bit values
1043 if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
1051 * pdc_tod_set - Set the Time-Of-Day clock.
1052 * @sec: The number of seconds since epoch.
1053 * @usec: The number of micro seconds.
1055 * Set the Time-Of-Day clock.
1057 int pdc_tod_set(unsigned long sec, unsigned long usec)
1060 unsigned long flags;
1062 spin_lock_irqsave(&pdc_lock, flags);
1063 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
1064 spin_unlock_irqrestore(&pdc_lock, flags);
1068 EXPORT_SYMBOL(pdc_tod_set);
1071 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
1072 struct pdc_memory_table *tbl, unsigned long entries)
1075 unsigned long flags;
1077 spin_lock_irqsave(&pdc_lock, flags);
1078 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
1079 convert_to_wide(pdc_result);
1080 memcpy(r_addr, pdc_result, sizeof(*r_addr));
1081 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
1082 spin_unlock_irqrestore(&pdc_lock, flags);
1086 #endif /* CONFIG_64BIT */
1088 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
1089 * so I guessed at unsigned long. Someone who knows what this does, can fix
1092 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1095 unsigned long flags;
1097 spin_lock_irqsave(&pdc_lock, flags);
1098 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1099 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1100 spin_unlock_irqrestore(&pdc_lock, flags);
1106 * pdc_do_reset - Reset the system.
1110 int pdc_do_reset(void)
1113 unsigned long flags;
1115 spin_lock_irqsave(&pdc_lock, flags);
1116 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1117 spin_unlock_irqrestore(&pdc_lock, flags);
1123 * pdc_soft_power_info - Enable soft power switch.
1124 * @power_reg: address of soft power register
1126 * Return the absolute address of the soft power switch register
1128 int __init pdc_soft_power_info(unsigned long *power_reg)
1131 unsigned long flags;
1133 *power_reg = (unsigned long) (-1);
1135 spin_lock_irqsave(&pdc_lock, flags);
1136 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1137 if (retval == PDC_OK) {
1138 convert_to_wide(pdc_result);
1139 *power_reg = f_extend(pdc_result[0]);
1141 spin_unlock_irqrestore(&pdc_lock, flags);
1147 * pdc_soft_power_button - Control the soft power button behaviour
1148 * @sw_control: 0 for hardware control, 1 for software control
1151 * This PDC function places the soft power button under software or
1153 * Under software control the OS may control to when to allow to shut
1154 * down the system. Under hardware control pressing the power button
1155 * powers off the system immediately.
1157 int pdc_soft_power_button(int sw_control)
1160 unsigned long flags;
1162 spin_lock_irqsave(&pdc_lock, flags);
1163 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1164 spin_unlock_irqrestore(&pdc_lock, flags);
1170 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1171 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1172 * who knows what other platform firmware might do with this OS "hook".
1174 void pdc_io_reset(void)
1176 unsigned long flags;
1178 spin_lock_irqsave(&pdc_lock, flags);
1179 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1180 spin_unlock_irqrestore(&pdc_lock, flags);
1184 * pdc_io_reset_devices - Hack to Stop USB controller
1186 * If PDC used the usb controller, the usb controller
1187 * is still running and will crash the machines during iommu
1188 * setup, because of still running DMA. This PDC call
1189 * stops the USB controller.
1190 * Normally called after calling pdc_io_reset().
1192 void pdc_io_reset_devices(void)
1194 unsigned long flags;
1196 spin_lock_irqsave(&pdc_lock, flags);
1197 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1198 spin_unlock_irqrestore(&pdc_lock, flags);
1201 #endif /* defined(BOOTLOADER) */
1203 /* locked by pdc_console_lock */
1204 static int __attribute__((aligned(8))) iodc_retbuf[32];
1205 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1208 * pdc_iodc_print - Console print using IODC.
1209 * @str: the string to output.
1210 * @count: length of str
1212 * Note that only these special chars are architected for console IODC io:
1213 * BEL, BS, CR, and LF. Others are passed through.
1214 * Since the HP console requires CR+LF to perform a 'newline', we translate
1217 int pdc_iodc_print(const unsigned char *str, unsigned count)
1220 unsigned long flags;
1222 for (i = 0; i < count;) {
1225 iodc_dbuf[i+0] = '\r';
1226 iodc_dbuf[i+1] = '\n';
1230 iodc_dbuf[i] = str[i];
1237 spin_lock_irqsave(&pdc_lock, flags);
1238 real32_call(PAGE0->mem_cons.iodc_io,
1239 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1240 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1241 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
1242 spin_unlock_irqrestore(&pdc_lock, flags);
1247 #if !defined(BOOTLOADER)
1249 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1251 * Read a character (non-blocking) from the PDC console, returns -1 if
1252 * key is not present.
1254 int pdc_iodc_getc(void)
1258 unsigned long flags;
1260 /* Bail if no console input device. */
1261 if (!PAGE0->mem_kbd.iodc_io)
1264 /* wait for a keyboard (rs232)-input */
1265 spin_lock_irqsave(&pdc_lock, flags);
1266 real32_call(PAGE0->mem_kbd.iodc_io,
1267 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1268 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1269 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1272 status = *iodc_retbuf;
1273 spin_unlock_irqrestore(&pdc_lock, flags);
1281 int pdc_sti_call(unsigned long func, unsigned long flags,
1282 unsigned long inptr, unsigned long outputr,
1283 unsigned long glob_cfg)
1286 unsigned long irqflags;
1288 spin_lock_irqsave(&pdc_lock, irqflags);
1289 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1290 spin_unlock_irqrestore(&pdc_lock, irqflags);
1294 EXPORT_SYMBOL(pdc_sti_call);
1298 * pdc_pat_cell_get_number - Returns the cell number.
1299 * @cell_info: The return buffer.
1301 * This PDC call returns the cell number of the cell from which the call
1304 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1307 unsigned long flags;
1309 spin_lock_irqsave(&pdc_lock, flags);
1310 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1311 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1312 spin_unlock_irqrestore(&pdc_lock, flags);
1318 * pdc_pat_cell_module - Retrieve the cell's module information.
1319 * @actcnt: The number of bytes written to mem_addr.
1320 * @ploc: The physical location.
1321 * @mod: The module index.
1322 * @view_type: The view of the address type.
1323 * @mem_addr: The return buffer.
1325 * This PDC call returns information about each module attached to the cell
1326 * at the specified location.
1328 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1329 unsigned long view_type, void *mem_addr)
1332 unsigned long flags;
1333 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1335 spin_lock_irqsave(&pdc_lock, flags);
1336 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1337 ploc, mod, view_type, __pa(&result));
1339 *actcnt = pdc_result[0];
1340 memcpy(mem_addr, &result, *actcnt);
1342 spin_unlock_irqrestore(&pdc_lock, flags);
1348 * pdc_pat_cell_info - Retrieve the cell's information.
1349 * @info: The pointer to a struct pdc_pat_cell_info_rtn_block.
1350 * @actcnt: The number of bytes which should be written to info.
1351 * @offset: offset of the structure.
1352 * @cell_number: The cell number which should be asked, or -1 for current cell.
1354 * This PDC call returns information about the given cell (or all cells).
1356 int pdc_pat_cell_info(struct pdc_pat_cell_info_rtn_block *info,
1357 unsigned long *actcnt, unsigned long offset,
1358 unsigned long cell_number)
1361 unsigned long flags;
1362 struct pdc_pat_cell_info_rtn_block result;
1364 spin_lock_irqsave(&pdc_lock, flags);
1365 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_INFO,
1366 __pa(pdc_result), __pa(&result), *actcnt,
1367 offset, cell_number);
1369 *actcnt = pdc_result[0];
1370 memcpy(info, &result, *actcnt);
1372 spin_unlock_irqrestore(&pdc_lock, flags);
1378 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1379 * @cpu_info: The return buffer.
1380 * @hpa: The Hard Physical Address of the CPU.
1382 * Retrieve the cpu number for the cpu at the specified HPA.
1384 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa)
1387 unsigned long flags;
1389 spin_lock_irqsave(&pdc_lock, flags);
1390 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1391 __pa(&pdc_result), hpa);
1392 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1393 spin_unlock_irqrestore(&pdc_lock, flags);
1399 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1400 * @num_entries: The return value.
1401 * @cell_num: The target cell.
1403 * This PDC function returns the number of entries in the specified cell's
1406 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1409 unsigned long flags;
1411 spin_lock_irqsave(&pdc_lock, flags);
1412 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1413 __pa(pdc_result), cell_num);
1414 *num_entries = pdc_result[0];
1415 spin_unlock_irqrestore(&pdc_lock, flags);
1421 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1422 * @r_addr: The return buffer.
1423 * @cell_num: The target cell.
1425 * This PDC function returns the actual interrupt table for the specified cell.
1427 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1430 unsigned long flags;
1432 spin_lock_irqsave(&pdc_lock, flags);
1433 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1434 __pa(r_addr), cell_num);
1435 spin_unlock_irqrestore(&pdc_lock, flags);
1441 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1442 * @actlen: The return buffer.
1443 * @mem_addr: Pointer to the memory buffer.
1444 * @count: The number of bytes to read from the buffer.
1445 * @offset: The offset with respect to the beginning of the buffer.
1448 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1449 unsigned long count, unsigned long offset)
1452 unsigned long flags;
1454 spin_lock_irqsave(&pdc_lock, flags);
1455 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1456 __pa(pdc_result2), count, offset);
1457 *actual_len = pdc_result[0];
1458 memcpy(mem_addr, pdc_result2, *actual_len);
1459 spin_unlock_irqrestore(&pdc_lock, flags);
1465 * pdc_pat_pd_get_PDC_interface_revisions - Retrieve PDC interface revisions.
1466 * @legacy_rev: The legacy revision.
1467 * @pat_rev: The PAT revision.
1468 * @pdc_cap: The PDC capabilities.
1471 int pdc_pat_pd_get_pdc_revisions(unsigned long *legacy_rev,
1472 unsigned long *pat_rev, unsigned long *pdc_cap)
1475 unsigned long flags;
1477 spin_lock_irqsave(&pdc_lock, flags);
1478 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_PDC_INTERF_REV,
1480 if (retval == PDC_OK) {
1481 *legacy_rev = pdc_result[0];
1482 *pat_rev = pdc_result[1];
1483 *pdc_cap = pdc_result[2];
1485 spin_unlock_irqrestore(&pdc_lock, flags);
1492 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1493 * @pci_addr: PCI configuration space address for which the read request is being made.
1494 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1495 * @mem_addr: Pointer to return memory buffer.
1498 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1501 unsigned long flags;
1503 spin_lock_irqsave(&pdc_lock, flags);
1504 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1505 __pa(pdc_result), pci_addr, pci_size);
1507 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break;
1508 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break;
1509 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break;
1511 spin_unlock_irqrestore(&pdc_lock, flags);
1517 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1518 * @pci_addr: PCI configuration space address for which the write request is being made.
1519 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1520 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1521 * written to PCI Config space.
1524 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1527 unsigned long flags;
1529 spin_lock_irqsave(&pdc_lock, flags);
1530 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1531 pci_addr, pci_size, val);
1532 spin_unlock_irqrestore(&pdc_lock, flags);
1538 * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table
1539 * @rinfo: memory pdt information
1542 int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
1545 unsigned long flags;
1547 spin_lock_irqsave(&pdc_lock, flags);
1548 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO,
1550 if (retval == PDC_OK)
1551 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1552 spin_unlock_irqrestore(&pdc_lock, flags);
1558 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
1560 * @rinfo: memory pdt information
1561 * @cell: cell number
1564 int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
1568 unsigned long flags;
1570 spin_lock_irqsave(&pdc_lock, flags);
1571 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
1572 __pa(&pdc_result), cell);
1573 if (retval == PDC_OK)
1574 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1575 spin_unlock_irqrestore(&pdc_lock, flags);
1581 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
1582 * @pret: array of PDT entries
1583 * @pdt_entries_ptr: ptr to hold number of PDT entries
1584 * @max_entries: maximum number of entries to be read
1587 int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1588 unsigned long *pdt_entries_ptr, unsigned long max_entries)
1591 unsigned long flags, entries;
1593 spin_lock_irqsave(&pdc_lock, flags);
1594 /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
1595 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
1596 __pa(&pdc_result), parisc_cell_num,
1597 __pa(pdt_entries_ptr));
1599 if (retval == PDC_OK) {
1600 /* build up return value as for PDC_PAT_MEM_PD_READ */
1601 entries = min(pdc_result[0], max_entries);
1602 pret->pdt_entries = entries;
1603 pret->actual_count_bytes = entries * sizeof(unsigned long);
1606 spin_unlock_irqrestore(&pdc_lock, flags);
1607 WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries);
1612 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
1613 * @pret: array of PDT entries
1614 * @pdt_entries_ptr: ptr to hold number of PDT entries
1615 * @count: number of bytes to read
1616 * @offset: offset to start (in bytes)
1619 int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1620 unsigned long *pdt_entries_ptr, unsigned long count,
1621 unsigned long offset)
1624 unsigned long flags, entries;
1626 spin_lock_irqsave(&pdc_lock, flags);
1627 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ,
1628 __pa(&pdc_result), __pa(pdt_entries_ptr),
1631 if (retval == PDC_OK) {
1632 entries = min(pdc_result[0], count);
1633 pret->actual_count_bytes = entries;
1634 pret->pdt_entries = entries / sizeof(unsigned long);
1637 spin_unlock_irqrestore(&pdc_lock, flags);
1643 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
1644 * @pret: ptr to hold returned information
1645 * @phys_addr: physical address to examine
1648 int pdc_pat_mem_get_dimm_phys_location(
1649 struct pdc_pat_mem_phys_mem_location *pret,
1650 unsigned long phys_addr)
1653 unsigned long flags;
1655 spin_lock_irqsave(&pdc_lock, flags);
1656 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
1657 __pa(&pdc_result), phys_addr);
1659 if (retval == PDC_OK)
1660 memcpy(pret, &pdc_result, sizeof(*pret));
1662 spin_unlock_irqrestore(&pdc_lock, flags);
1666 #endif /* CONFIG_64BIT */
1667 #endif /* defined(BOOTLOADER) */
1670 /***************** 32-bit real-mode calls ***********/
1671 /* The struct below is used
1672 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1673 * real32_call_asm() then uses this stack in narrow real mode
1676 struct narrow_stack {
1677 /* use int, not long which is 64 bits */
1692 unsigned int frame_marker[8];
1694 /* in reality, there's nearly 8k of stack after this */
1697 long real32_call(unsigned long fn, ...)
1700 extern struct narrow_stack real_stack;
1701 extern unsigned long real32_call_asm(unsigned int *,
1706 real_stack.arg0 = va_arg(args, unsigned int);
1707 real_stack.arg1 = va_arg(args, unsigned int);
1708 real_stack.arg2 = va_arg(args, unsigned int);
1709 real_stack.arg3 = va_arg(args, unsigned int);
1710 real_stack.arg4 = va_arg(args, unsigned int);
1711 real_stack.arg5 = va_arg(args, unsigned int);
1712 real_stack.arg6 = va_arg(args, unsigned int);
1713 real_stack.arg7 = va_arg(args, unsigned int);
1714 real_stack.arg8 = va_arg(args, unsigned int);
1715 real_stack.arg9 = va_arg(args, unsigned int);
1716 real_stack.arg10 = va_arg(args, unsigned int);
1717 real_stack.arg11 = va_arg(args, unsigned int);
1718 real_stack.arg12 = va_arg(args, unsigned int);
1719 real_stack.arg13 = va_arg(args, unsigned int);
1722 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1726 /***************** 64-bit real-mode calls ***********/
1739 unsigned long arg10;
1740 unsigned long arg11;
1741 unsigned long arg12;
1742 unsigned long arg13;
1743 unsigned long frame_marker[2]; /* rp, previous sp */
1745 /* in reality, there's nearly 8k of stack after this */
1748 long real64_call(unsigned long fn, ...)
1751 extern struct wide_stack real64_stack;
1752 extern unsigned long real64_call_asm(unsigned long *,
1757 real64_stack.arg0 = va_arg(args, unsigned long);
1758 real64_stack.arg1 = va_arg(args, unsigned long);
1759 real64_stack.arg2 = va_arg(args, unsigned long);
1760 real64_stack.arg3 = va_arg(args, unsigned long);
1761 real64_stack.arg4 = va_arg(args, unsigned long);
1762 real64_stack.arg5 = va_arg(args, unsigned long);
1763 real64_stack.arg6 = va_arg(args, unsigned long);
1764 real64_stack.arg7 = va_arg(args, unsigned long);
1765 real64_stack.arg8 = va_arg(args, unsigned long);
1766 real64_stack.arg9 = va_arg(args, unsigned long);
1767 real64_stack.arg10 = va_arg(args, unsigned long);
1768 real64_stack.arg11 = va_arg(args, unsigned long);
1769 real64_stack.arg12 = va_arg(args, unsigned long);
1770 real64_stack.arg13 = va_arg(args, unsigned long);
1773 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1776 #endif /* CONFIG_64BIT */