2 * arch/parisc/kernel/firmware.c - safe PDC access routines
4 * PDC == Processor Dependent Code
6 * See http://www.parisc-linux.org/documentation/index.html
7 * for documentation describing the entry points and calling
8 * conventions defined below.
10 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
11 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
12 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
13 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
14 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
23 /* I think it would be in everyone's best interest to follow this
24 * guidelines when writing PDC wrappers:
26 * - the name of the pdc wrapper should match one of the macros
27 * used for the first two arguments
28 * - don't use caps for random parts of the name
29 * - use the static PDC result buffers and "copyout" to structs
30 * supplied by the caller to encapsulate alignment restrictions
31 * - hold pdc_lock while in PDC or using static result buffers
32 * - use __pa() to convert virtual (kernel) pointers to physical
34 * - the name of the struct used for pdc return values should equal
35 * one of the macros used for the first two arguments to the
36 * corresponding PDC call
37 * - keep the order of arguments
38 * - don't be smart (setting trailing NUL bytes for strings, return
39 * something useful even if the call failed) unless you are sure
40 * it's not going to affect functionality or performance
43 * int pdc_cache_info(struct pdc_cache_info *cache_info )
47 * spin_lock_irq(&pdc_lock);
48 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
49 * convert_to_wide(pdc_result);
50 * memcpy(cache_info, pdc_result, sizeof(*cache_info));
51 * spin_unlock_irq(&pdc_lock);
60 #include <linux/delay.h>
61 #include <linux/init.h>
62 #include <linux/kernel.h>
63 #include <linux/module.h>
64 #include <linux/string.h>
65 #include <linux/spinlock.h>
69 #include <asm/pdcpat.h>
70 #include <asm/processor.h> /* for boot_cpu_data */
72 #if defined(BOOTLOADER)
73 # undef spin_lock_irqsave
74 # define spin_lock_irqsave(a, b) { b = 1; }
75 # undef spin_unlock_irqrestore
76 # define spin_unlock_irqrestore(a, b)
78 static DEFINE_SPINLOCK(pdc_lock);
81 extern unsigned long pdc_result[NUM_PDC_RESULT];
82 extern unsigned long pdc_result2[NUM_PDC_RESULT];
85 #define WIDE_FIRMWARE 0x1
86 #define NARROW_FIRMWARE 0x2
88 /* Firmware needs to be initially set to narrow to determine the
89 * actual firmware width. */
90 int parisc_narrow_firmware __ro_after_init = 1;
93 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
94 * and MEM_PDC calls are always the same width as the OS.
95 * Some PAT boxes may have 64-bit IODC I/O.
97 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
98 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
99 * This allowed wide kernels to run on Cxxx boxes.
100 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
101 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
105 long real64_call(unsigned long function, ...);
107 long real32_call(unsigned long function, ...);
110 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
111 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
113 # define MEM_PDC (unsigned long)PAGE0->mem_pdc
114 # define mem_pdc_call(args...) real32_call(MEM_PDC, args)
119 * f_extend - Convert PDC addresses to kernel addresses.
120 * @address: Address returned from PDC.
122 * This function is used to convert PDC addresses into kernel addresses
123 * when the PDC address size and kernel address size are different.
125 static unsigned long f_extend(unsigned long address)
128 if(unlikely(parisc_narrow_firmware)) {
129 if((address & 0xff000000) == 0xf0000000)
130 return 0xf0f0f0f000000000UL | (u32)address;
132 if((address & 0xf0000000) == 0xf0000000)
133 return 0xffffffff00000000UL | (u32)address;
140 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
141 * @address: The return buffer from PDC.
143 * This function is used to convert the return buffer addresses retrieved from PDC
144 * into kernel addresses when the PDC address size and kernel address size are
147 static void convert_to_wide(unsigned long *addr)
151 unsigned int *p = (unsigned int *)addr;
153 if (unlikely(parisc_narrow_firmware)) {
154 for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
161 void set_firmware_width_unlocked(void)
165 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
166 __pa(pdc_result), 0);
167 convert_to_wide(pdc_result);
168 if (pdc_result[0] != NARROW_FIRMWARE)
169 parisc_narrow_firmware = 0;
173 * set_firmware_width - Determine if the firmware is wide or narrow.
175 * This function must be called before any pdc_* function that uses the
176 * convert_to_wide function.
178 void set_firmware_width(void)
181 spin_lock_irqsave(&pdc_lock, flags);
182 set_firmware_width_unlocked();
183 spin_unlock_irqrestore(&pdc_lock, flags);
186 void set_firmware_width_unlocked(void)
191 void set_firmware_width(void)
195 #endif /*CONFIG_64BIT*/
198 #if !defined(BOOTLOADER)
200 * pdc_emergency_unlock - Unlock the linux pdc lock
202 * This call unlocks the linux pdc lock in case we need some PDC functions
203 * (like pdc_add_valid) during kernel stack dump.
205 void pdc_emergency_unlock(void)
207 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
208 if (spin_is_locked(&pdc_lock))
209 spin_unlock(&pdc_lock);
214 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
215 * @address: Address to be verified.
217 * This PDC call attempts to read from the specified address and verifies
218 * if the address is valid.
220 * The return value is PDC_OK (0) in case accessing this address is valid.
222 int pdc_add_valid(unsigned long address)
227 spin_lock_irqsave(&pdc_lock, flags);
228 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
229 spin_unlock_irqrestore(&pdc_lock, flags);
233 EXPORT_SYMBOL(pdc_add_valid);
236 * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
237 * @instr: Pointer to variable which will get instruction opcode.
239 * The return value is PDC_OK (0) in case call succeeded.
241 int __init pdc_instr(unsigned int *instr)
246 spin_lock_irqsave(&pdc_lock, flags);
247 retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
248 convert_to_wide(pdc_result);
249 *instr = pdc_result[0];
250 spin_unlock_irqrestore(&pdc_lock, flags);
256 * pdc_chassis_info - Return chassis information.
257 * @result: The return buffer.
258 * @chassis_info: The memory buffer address.
259 * @len: The size of the memory buffer address.
261 * An HVERSION dependent call for returning the chassis information.
263 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
268 spin_lock_irqsave(&pdc_lock, flags);
269 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
270 memcpy(&pdc_result2, led_info, len);
271 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
272 __pa(pdc_result), __pa(pdc_result2), len);
273 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
274 memcpy(led_info, pdc_result2, len);
275 spin_unlock_irqrestore(&pdc_lock, flags);
281 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
282 * @retval: -1 on error, 0 on success. Other value are PDC errors
284 * Must be correctly formatted or expect system crash
287 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
295 spin_lock_irqsave(&pdc_lock, flags);
296 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
297 spin_unlock_irqrestore(&pdc_lock, flags);
304 * pdc_chassis_disp - Updates chassis code
305 * @retval: -1 on error, 0 on success
307 int pdc_chassis_disp(unsigned long disp)
312 spin_lock_irqsave(&pdc_lock, flags);
313 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
314 spin_unlock_irqrestore(&pdc_lock, flags);
320 * pdc_chassis_warn - Fetches chassis warnings
321 * @retval: -1 on error, 0 on success
323 int pdc_chassis_warn(unsigned long *warn)
328 spin_lock_irqsave(&pdc_lock, flags);
329 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
330 *warn = pdc_result[0];
331 spin_unlock_irqrestore(&pdc_lock, flags);
336 int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
340 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
341 convert_to_wide(pdc_result);
342 pdc_coproc_info->ccr_functional = pdc_result[0];
343 pdc_coproc_info->ccr_present = pdc_result[1];
344 pdc_coproc_info->revision = pdc_result[17];
345 pdc_coproc_info->model = pdc_result[18];
351 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
352 * @pdc_coproc_info: Return buffer address.
354 * This PDC call returns the presence and status of all the coprocessors
355 * attached to the processor.
357 int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
362 spin_lock_irqsave(&pdc_lock, flags);
363 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
364 spin_unlock_irqrestore(&pdc_lock, flags);
370 * pdc_iodc_read - Read data from the modules IODC.
371 * @actcnt: The actual number of bytes.
372 * @hpa: The HPA of the module for the iodc read.
373 * @index: The iodc entry point.
374 * @iodc_data: A buffer memory for the iodc options.
375 * @iodc_data_size: Size of the memory buffer.
377 * This PDC call reads from the IODC of the module specified by the hpa
380 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
381 void *iodc_data, unsigned int iodc_data_size)
386 spin_lock_irqsave(&pdc_lock, flags);
387 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
388 index, __pa(pdc_result2), iodc_data_size);
389 convert_to_wide(pdc_result);
390 *actcnt = pdc_result[0];
391 memcpy(iodc_data, pdc_result2, iodc_data_size);
392 spin_unlock_irqrestore(&pdc_lock, flags);
396 EXPORT_SYMBOL(pdc_iodc_read);
399 * pdc_system_map_find_mods - Locate unarchitected modules.
400 * @pdc_mod_info: Return buffer address.
401 * @mod_path: pointer to dev path structure.
402 * @mod_index: fixed address module index.
404 * To locate and identify modules which reside at fixed I/O addresses, which
405 * do not self-identify via architected bus walks.
407 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
408 struct pdc_module_path *mod_path, long mod_index)
413 spin_lock_irqsave(&pdc_lock, flags);
414 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
415 __pa(pdc_result2), mod_index);
416 convert_to_wide(pdc_result);
417 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
418 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
419 spin_unlock_irqrestore(&pdc_lock, flags);
421 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
426 * pdc_system_map_find_addrs - Retrieve additional address ranges.
427 * @pdc_addr_info: Return buffer address.
428 * @mod_index: Fixed address module index.
429 * @addr_index: Address range index.
431 * Retrieve additional information about subsequent address ranges for modules
432 * with multiple address ranges.
434 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
435 long mod_index, long addr_index)
440 spin_lock_irqsave(&pdc_lock, flags);
441 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
442 mod_index, addr_index);
443 convert_to_wide(pdc_result);
444 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
445 spin_unlock_irqrestore(&pdc_lock, flags);
447 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
452 * pdc_model_info - Return model information about the processor.
453 * @model: The return buffer.
455 * Returns the version numbers, identifiers, and capabilities from the processor module.
457 int pdc_model_info(struct pdc_model *model)
462 spin_lock_irqsave(&pdc_lock, flags);
463 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
464 convert_to_wide(pdc_result);
465 memcpy(model, pdc_result, sizeof(*model));
466 spin_unlock_irqrestore(&pdc_lock, flags);
472 * pdc_model_sysmodel - Get the system model name.
473 * @name: A char array of at least 81 characters.
475 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
476 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
479 int pdc_model_sysmodel(char *name)
484 spin_lock_irqsave(&pdc_lock, flags);
485 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
486 OS_ID_HPUX, __pa(name));
487 convert_to_wide(pdc_result);
489 if (retval == PDC_OK) {
490 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
494 spin_unlock_irqrestore(&pdc_lock, flags);
500 * pdc_model_versions - Identify the version number of each processor.
501 * @cpu_id: The return buffer.
502 * @id: The id of the processor to check.
504 * Returns the version number for each processor component.
506 * This comment was here before, but I do not know what it means :( -RB
507 * id: 0 = cpu revision, 1 = boot-rom-version
509 int pdc_model_versions(unsigned long *versions, int id)
514 spin_lock_irqsave(&pdc_lock, flags);
515 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
516 convert_to_wide(pdc_result);
517 *versions = pdc_result[0];
518 spin_unlock_irqrestore(&pdc_lock, flags);
524 * pdc_model_cpuid - Returns the CPU_ID.
525 * @cpu_id: The return buffer.
527 * Returns the CPU_ID value which uniquely identifies the cpu portion of
528 * the processor module.
530 int pdc_model_cpuid(unsigned long *cpu_id)
535 spin_lock_irqsave(&pdc_lock, flags);
536 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
537 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
538 convert_to_wide(pdc_result);
539 *cpu_id = pdc_result[0];
540 spin_unlock_irqrestore(&pdc_lock, flags);
546 * pdc_model_capabilities - Returns the platform capabilities.
547 * @capabilities: The return buffer.
549 * Returns information about platform support for 32- and/or 64-bit
550 * OSes, IO-PDIR coherency, and virtual aliasing.
552 int pdc_model_capabilities(unsigned long *capabilities)
557 spin_lock_irqsave(&pdc_lock, flags);
558 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
559 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
560 convert_to_wide(pdc_result);
561 if (retval == PDC_OK) {
562 *capabilities = pdc_result[0];
564 *capabilities = PDC_MODEL_OS32;
566 spin_unlock_irqrestore(&pdc_lock, flags);
572 * pdc_model_platform_info - Returns machine product and serial number.
573 * @orig_prod_num: Return buffer for original product number.
574 * @current_prod_num: Return buffer for current product number.
575 * @serial_no: Return buffer for serial number.
577 * Returns strings containing the original and current product numbers and the
578 * serial number of the system.
580 int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num,
586 spin_lock_irqsave(&pdc_lock, flags);
587 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO,
588 __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no));
589 convert_to_wide(pdc_result);
590 spin_unlock_irqrestore(&pdc_lock, flags);
596 * pdc_cache_info - Return cache and TLB information.
597 * @cache_info: The return buffer.
599 * Returns information about the processor's cache and TLB.
601 int pdc_cache_info(struct pdc_cache_info *cache_info)
606 spin_lock_irqsave(&pdc_lock, flags);
607 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
608 convert_to_wide(pdc_result);
609 memcpy(cache_info, pdc_result, sizeof(*cache_info));
610 spin_unlock_irqrestore(&pdc_lock, flags);
616 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
617 * @space_bits: Should be 0, if not, bad mojo!
619 * Returns information about Space ID hashing.
621 int pdc_spaceid_bits(unsigned long *space_bits)
626 spin_lock_irqsave(&pdc_lock, flags);
628 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
629 convert_to_wide(pdc_result);
630 *space_bits = pdc_result[0];
631 spin_unlock_irqrestore(&pdc_lock, flags);
638 * pdc_btlb_info - Return block TLB information.
639 * @btlb: The return buffer.
641 * Returns information about the hardware Block TLB.
643 int pdc_btlb_info(struct pdc_btlb_info *btlb)
648 spin_lock_irqsave(&pdc_lock, flags);
649 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
650 memcpy(btlb, pdc_result, sizeof(*btlb));
651 spin_unlock_irqrestore(&pdc_lock, flags);
660 * pdc_mem_map_hpa - Find fixed module information.
661 * @address: The return buffer
662 * @mod_path: pointer to dev path structure.
664 * This call was developed for S700 workstations to allow the kernel to find
665 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
666 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
669 * This call is supported by all existing S700 workstations (up to Gecko).
671 int pdc_mem_map_hpa(struct pdc_memory_map *address,
672 struct pdc_module_path *mod_path)
677 spin_lock_irqsave(&pdc_lock, flags);
678 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
679 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
681 memcpy(address, pdc_result, sizeof(*address));
682 spin_unlock_irqrestore(&pdc_lock, flags);
686 #endif /* !CONFIG_PA20 */
689 * pdc_lan_station_id - Get the LAN address.
690 * @lan_addr: The return buffer.
691 * @hpa: The network device HPA.
693 * Get the LAN station address when it is not directly available from the LAN hardware.
695 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
700 spin_lock_irqsave(&pdc_lock, flags);
701 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
702 __pa(pdc_result), hpa);
704 /* FIXME: else read MAC from NVRAM */
705 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
707 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
709 spin_unlock_irqrestore(&pdc_lock, flags);
713 EXPORT_SYMBOL(pdc_lan_station_id);
716 * pdc_stable_read - Read data from Stable Storage.
717 * @staddr: Stable Storage address to access.
718 * @memaddr: The memory address where Stable Storage data shall be copied.
719 * @count: number of bytes to transfer. count is multiple of 4.
721 * This PDC call reads from the Stable Storage address supplied in staddr
722 * and copies count bytes to the memory address memaddr.
723 * The call will fail if staddr+count > PDC_STABLE size.
725 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
730 spin_lock_irqsave(&pdc_lock, flags);
731 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
732 __pa(pdc_result), count);
733 convert_to_wide(pdc_result);
734 memcpy(memaddr, pdc_result, count);
735 spin_unlock_irqrestore(&pdc_lock, flags);
739 EXPORT_SYMBOL(pdc_stable_read);
742 * pdc_stable_write - Write data to Stable Storage.
743 * @staddr: Stable Storage address to access.
744 * @memaddr: The memory address where Stable Storage data shall be read from.
745 * @count: number of bytes to transfer. count is multiple of 4.
747 * This PDC call reads count bytes from the supplied memaddr address,
748 * and copies count bytes to the Stable Storage address staddr.
749 * The call will fail if staddr+count > PDC_STABLE size.
751 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
756 spin_lock_irqsave(&pdc_lock, flags);
757 memcpy(pdc_result, memaddr, count);
758 convert_to_wide(pdc_result);
759 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
760 __pa(pdc_result), count);
761 spin_unlock_irqrestore(&pdc_lock, flags);
765 EXPORT_SYMBOL(pdc_stable_write);
768 * pdc_stable_get_size - Get Stable Storage size in bytes.
769 * @size: pointer where the size will be stored.
771 * This PDC call returns the number of bytes in the processor's Stable
772 * Storage, which is the number of contiguous bytes implemented in Stable
773 * Storage starting from staddr=0. size in an unsigned 64-bit integer
774 * which is a multiple of four.
776 int pdc_stable_get_size(unsigned long *size)
781 spin_lock_irqsave(&pdc_lock, flags);
782 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
783 *size = pdc_result[0];
784 spin_unlock_irqrestore(&pdc_lock, flags);
788 EXPORT_SYMBOL(pdc_stable_get_size);
791 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
793 * This PDC call is meant to be used to check the integrity of the current
794 * contents of Stable Storage.
796 int pdc_stable_verify_contents(void)
801 spin_lock_irqsave(&pdc_lock, flags);
802 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
803 spin_unlock_irqrestore(&pdc_lock, flags);
807 EXPORT_SYMBOL(pdc_stable_verify_contents);
810 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
811 * the validity indicator.
813 * This PDC call will erase all contents of Stable Storage. Use with care!
815 int pdc_stable_initialize(void)
820 spin_lock_irqsave(&pdc_lock, flags);
821 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
822 spin_unlock_irqrestore(&pdc_lock, flags);
826 EXPORT_SYMBOL(pdc_stable_initialize);
829 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
830 * @hwpath: fully bc.mod style path to the device.
831 * @initiator: the array to return the result into
833 * Get the SCSI operational parameters from PDC.
834 * Needed since HPUX never used BIOS or symbios card NVRAM.
835 * Most ncr/sym cards won't have an entry and just use whatever
836 * capabilities of the card are (eg Ultra, LVD). But there are
837 * several cases where it's useful:
838 * o set SCSI id for Multi-initiator clusters,
839 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
840 * o bus width exported is less than what the interface chip supports.
842 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
847 spin_lock_irqsave(&pdc_lock, flags);
849 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
850 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
851 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
853 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
854 __pa(pdc_result), __pa(hwpath));
858 if (pdc_result[0] < 16) {
859 initiator->host_id = pdc_result[0];
861 initiator->host_id = -1;
865 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
866 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
868 switch (pdc_result[1]) {
869 case 1: initiator->factor = 50; break;
870 case 2: initiator->factor = 25; break;
871 case 5: initiator->factor = 12; break;
872 case 25: initiator->factor = 10; break;
873 case 20: initiator->factor = 12; break;
874 case 40: initiator->factor = 10; break;
875 default: initiator->factor = -1; break;
878 if (IS_SPROCKETS()) {
879 initiator->width = pdc_result[4];
880 initiator->mode = pdc_result[5];
882 initiator->width = -1;
883 initiator->mode = -1;
887 spin_unlock_irqrestore(&pdc_lock, flags);
889 return (retval >= PDC_OK);
891 EXPORT_SYMBOL(pdc_get_initiator);
895 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
896 * @num_entries: The return value.
897 * @hpa: The HPA for the device.
899 * This PDC function returns the number of entries in the specified cell's
901 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
903 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
908 spin_lock_irqsave(&pdc_lock, flags);
909 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
910 __pa(pdc_result), hpa);
911 convert_to_wide(pdc_result);
912 *num_entries = pdc_result[0];
913 spin_unlock_irqrestore(&pdc_lock, flags);
919 * pdc_pci_irt - Get the PCI interrupt routing table.
920 * @num_entries: The number of entries in the table.
921 * @hpa: The Hard Physical Address of the device.
924 * Get the PCI interrupt routing table for the device at the given HPA.
925 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
927 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
932 BUG_ON((unsigned long)tbl & 0x7);
934 spin_lock_irqsave(&pdc_lock, flags);
935 pdc_result[0] = num_entries;
936 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
937 __pa(pdc_result), hpa, __pa(tbl));
938 spin_unlock_irqrestore(&pdc_lock, flags);
944 #if 0 /* UNTEST CODE - left here in case someone needs it */
947 * pdc_pci_config_read - read PCI config space.
948 * @hpa token from PDC to indicate which PCI device
949 * @pci_addr configuration space address to read from
951 * Read PCI Configuration space *before* linux PCI subsystem is running.
953 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
958 spin_lock_irqsave(&pdc_lock, flags);
961 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
962 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
963 spin_unlock_irqrestore(&pdc_lock, flags);
965 return retval ? ~0 : (unsigned int) pdc_result[0];
970 * pdc_pci_config_write - read PCI config space.
971 * @hpa token from PDC to indicate which PCI device
972 * @pci_addr configuration space address to write
973 * @val value we want in the 32-bit register
975 * Write PCI Configuration space *before* linux PCI subsystem is running.
977 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
982 spin_lock_irqsave(&pdc_lock, flags);
984 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
985 __pa(pdc_result), hpa,
986 cfg_addr&~3UL, 4UL, (unsigned long) val);
987 spin_unlock_irqrestore(&pdc_lock, flags);
991 #endif /* UNTESTED CODE */
994 * pdc_tod_read - Read the Time-Of-Day clock.
995 * @tod: The return buffer:
997 * Read the Time-Of-Day clock
999 int pdc_tod_read(struct pdc_tod *tod)
1002 unsigned long flags;
1004 spin_lock_irqsave(&pdc_lock, flags);
1005 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
1006 convert_to_wide(pdc_result);
1007 memcpy(tod, pdc_result, sizeof(*tod));
1008 spin_unlock_irqrestore(&pdc_lock, flags);
1012 EXPORT_SYMBOL(pdc_tod_read);
1014 int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo)
1017 unsigned long flags;
1019 spin_lock_irqsave(&pdc_lock, flags);
1020 retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0);
1021 convert_to_wide(pdc_result);
1022 memcpy(rinfo, pdc_result, sizeof(*rinfo));
1023 spin_unlock_irqrestore(&pdc_lock, flags);
1028 int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
1029 unsigned long *pdt_entries_ptr)
1032 unsigned long flags;
1034 spin_lock_irqsave(&pdc_lock, flags);
1035 retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
1036 __pa(pdt_entries_ptr));
1037 if (retval == PDC_OK) {
1038 convert_to_wide(pdc_result);
1039 memcpy(pret, pdc_result, sizeof(*pret));
1041 spin_unlock_irqrestore(&pdc_lock, flags);
1045 * 64-bit kernels should not call this PDT function in narrow mode.
1046 * The pdt_entries_ptr array above will now contain 32-bit values
1048 if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
1056 * pdc_tod_set - Set the Time-Of-Day clock.
1057 * @sec: The number of seconds since epoch.
1058 * @usec: The number of micro seconds.
1060 * Set the Time-Of-Day clock.
1062 int pdc_tod_set(unsigned long sec, unsigned long usec)
1065 unsigned long flags;
1067 spin_lock_irqsave(&pdc_lock, flags);
1068 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
1069 spin_unlock_irqrestore(&pdc_lock, flags);
1073 EXPORT_SYMBOL(pdc_tod_set);
1076 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
1077 struct pdc_memory_table *tbl, unsigned long entries)
1080 unsigned long flags;
1082 spin_lock_irqsave(&pdc_lock, flags);
1083 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
1084 convert_to_wide(pdc_result);
1085 memcpy(r_addr, pdc_result, sizeof(*r_addr));
1086 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
1087 spin_unlock_irqrestore(&pdc_lock, flags);
1091 #endif /* CONFIG_64BIT */
1093 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
1094 * so I guessed at unsigned long. Someone who knows what this does, can fix
1097 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1100 unsigned long flags;
1102 spin_lock_irqsave(&pdc_lock, flags);
1103 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1104 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1105 spin_unlock_irqrestore(&pdc_lock, flags);
1111 * pdc_do_reset - Reset the system.
1115 int pdc_do_reset(void)
1118 unsigned long flags;
1120 spin_lock_irqsave(&pdc_lock, flags);
1121 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1122 spin_unlock_irqrestore(&pdc_lock, flags);
1128 * pdc_soft_power_info - Enable soft power switch.
1129 * @power_reg: address of soft power register
1131 * Return the absolute address of the soft power switch register
1133 int __init pdc_soft_power_info(unsigned long *power_reg)
1136 unsigned long flags;
1138 *power_reg = (unsigned long) (-1);
1140 spin_lock_irqsave(&pdc_lock, flags);
1141 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1142 if (retval == PDC_OK) {
1143 convert_to_wide(pdc_result);
1144 *power_reg = f_extend(pdc_result[0]);
1146 spin_unlock_irqrestore(&pdc_lock, flags);
1152 * pdc_soft_power_button - Control the soft power button behaviour
1153 * @sw_control: 0 for hardware control, 1 for software control
1156 * This PDC function places the soft power button under software or
1158 * Under software control the OS may control to when to allow to shut
1159 * down the system. Under hardware control pressing the power button
1160 * powers off the system immediately.
1162 int pdc_soft_power_button(int sw_control)
1165 unsigned long flags;
1167 spin_lock_irqsave(&pdc_lock, flags);
1168 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1169 spin_unlock_irqrestore(&pdc_lock, flags);
1175 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1176 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1177 * who knows what other platform firmware might do with this OS "hook".
1179 void pdc_io_reset(void)
1181 unsigned long flags;
1183 spin_lock_irqsave(&pdc_lock, flags);
1184 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1185 spin_unlock_irqrestore(&pdc_lock, flags);
1189 * pdc_io_reset_devices - Hack to Stop USB controller
1191 * If PDC used the usb controller, the usb controller
1192 * is still running and will crash the machines during iommu
1193 * setup, because of still running DMA. This PDC call
1194 * stops the USB controller.
1195 * Normally called after calling pdc_io_reset().
1197 void pdc_io_reset_devices(void)
1199 unsigned long flags;
1201 spin_lock_irqsave(&pdc_lock, flags);
1202 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1203 spin_unlock_irqrestore(&pdc_lock, flags);
1206 #endif /* defined(BOOTLOADER) */
1208 /* locked by pdc_console_lock */
1209 static int __attribute__((aligned(8))) iodc_retbuf[32];
1210 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1213 * pdc_iodc_print - Console print using IODC.
1214 * @str: the string to output.
1215 * @count: length of str
1217 * Note that only these special chars are architected for console IODC io:
1218 * BEL, BS, CR, and LF. Others are passed through.
1219 * Since the HP console requires CR+LF to perform a 'newline', we translate
1222 int pdc_iodc_print(const unsigned char *str, unsigned count)
1225 unsigned long flags;
1227 for (i = 0; i < count;) {
1230 iodc_dbuf[i+0] = '\r';
1231 iodc_dbuf[i+1] = '\n';
1235 iodc_dbuf[i] = str[i];
1242 spin_lock_irqsave(&pdc_lock, flags);
1243 real32_call(PAGE0->mem_cons.iodc_io,
1244 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1245 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1246 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
1247 spin_unlock_irqrestore(&pdc_lock, flags);
1252 #if !defined(BOOTLOADER)
1254 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1256 * Read a character (non-blocking) from the PDC console, returns -1 if
1257 * key is not present.
1259 int pdc_iodc_getc(void)
1263 unsigned long flags;
1265 /* Bail if no console input device. */
1266 if (!PAGE0->mem_kbd.iodc_io)
1269 /* wait for a keyboard (rs232)-input */
1270 spin_lock_irqsave(&pdc_lock, flags);
1271 real32_call(PAGE0->mem_kbd.iodc_io,
1272 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1273 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1274 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1277 status = *iodc_retbuf;
1278 spin_unlock_irqrestore(&pdc_lock, flags);
1286 int pdc_sti_call(unsigned long func, unsigned long flags,
1287 unsigned long inptr, unsigned long outputr,
1288 unsigned long glob_cfg)
1291 unsigned long irqflags;
1293 spin_lock_irqsave(&pdc_lock, irqflags);
1294 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1295 spin_unlock_irqrestore(&pdc_lock, irqflags);
1299 EXPORT_SYMBOL(pdc_sti_call);
1303 * pdc_pat_cell_get_number - Returns the cell number.
1304 * @cell_info: The return buffer.
1306 * This PDC call returns the cell number of the cell from which the call
1309 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1312 unsigned long flags;
1314 spin_lock_irqsave(&pdc_lock, flags);
1315 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1316 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1317 spin_unlock_irqrestore(&pdc_lock, flags);
1323 * pdc_pat_cell_module - Retrieve the cell's module information.
1324 * @actcnt: The number of bytes written to mem_addr.
1325 * @ploc: The physical location.
1326 * @mod: The module index.
1327 * @view_type: The view of the address type.
1328 * @mem_addr: The return buffer.
1330 * This PDC call returns information about each module attached to the cell
1331 * at the specified location.
1333 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1334 unsigned long view_type, void *mem_addr)
1337 unsigned long flags;
1338 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1340 spin_lock_irqsave(&pdc_lock, flags);
1341 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1342 ploc, mod, view_type, __pa(&result));
1344 *actcnt = pdc_result[0];
1345 memcpy(mem_addr, &result, *actcnt);
1347 spin_unlock_irqrestore(&pdc_lock, flags);
1353 * pdc_pat_cell_info - Retrieve the cell's information.
1354 * @info: The pointer to a struct pdc_pat_cell_info_rtn_block.
1355 * @actcnt: The number of bytes which should be written to info.
1356 * @offset: offset of the structure.
1357 * @cell_number: The cell number which should be asked, or -1 for current cell.
1359 * This PDC call returns information about the given cell (or all cells).
1361 int pdc_pat_cell_info(struct pdc_pat_cell_info_rtn_block *info,
1362 unsigned long *actcnt, unsigned long offset,
1363 unsigned long cell_number)
1366 unsigned long flags;
1367 struct pdc_pat_cell_info_rtn_block result;
1369 spin_lock_irqsave(&pdc_lock, flags);
1370 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_INFO,
1371 __pa(pdc_result), __pa(&result), *actcnt,
1372 offset, cell_number);
1374 *actcnt = pdc_result[0];
1375 memcpy(info, &result, *actcnt);
1377 spin_unlock_irqrestore(&pdc_lock, flags);
1383 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1384 * @cpu_info: The return buffer.
1385 * @hpa: The Hard Physical Address of the CPU.
1387 * Retrieve the cpu number for the cpu at the specified HPA.
1389 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa)
1392 unsigned long flags;
1394 spin_lock_irqsave(&pdc_lock, flags);
1395 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1396 __pa(&pdc_result), hpa);
1397 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1398 spin_unlock_irqrestore(&pdc_lock, flags);
1404 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1405 * @num_entries: The return value.
1406 * @cell_num: The target cell.
1408 * This PDC function returns the number of entries in the specified cell's
1411 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1414 unsigned long flags;
1416 spin_lock_irqsave(&pdc_lock, flags);
1417 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1418 __pa(pdc_result), cell_num);
1419 *num_entries = pdc_result[0];
1420 spin_unlock_irqrestore(&pdc_lock, flags);
1426 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1427 * @r_addr: The return buffer.
1428 * @cell_num: The target cell.
1430 * This PDC function returns the actual interrupt table for the specified cell.
1432 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1435 unsigned long flags;
1437 spin_lock_irqsave(&pdc_lock, flags);
1438 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1439 __pa(r_addr), cell_num);
1440 spin_unlock_irqrestore(&pdc_lock, flags);
1446 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1447 * @actlen: The return buffer.
1448 * @mem_addr: Pointer to the memory buffer.
1449 * @count: The number of bytes to read from the buffer.
1450 * @offset: The offset with respect to the beginning of the buffer.
1453 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1454 unsigned long count, unsigned long offset)
1457 unsigned long flags;
1459 spin_lock_irqsave(&pdc_lock, flags);
1460 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1461 __pa(pdc_result2), count, offset);
1462 *actual_len = pdc_result[0];
1463 memcpy(mem_addr, pdc_result2, *actual_len);
1464 spin_unlock_irqrestore(&pdc_lock, flags);
1470 * pdc_pat_pd_get_PDC_interface_revisions - Retrieve PDC interface revisions.
1471 * @legacy_rev: The legacy revision.
1472 * @pat_rev: The PAT revision.
1473 * @pdc_cap: The PDC capabilities.
1476 int pdc_pat_pd_get_pdc_revisions(unsigned long *legacy_rev,
1477 unsigned long *pat_rev, unsigned long *pdc_cap)
1480 unsigned long flags;
1482 spin_lock_irqsave(&pdc_lock, flags);
1483 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_PDC_INTERF_REV,
1485 if (retval == PDC_OK) {
1486 *legacy_rev = pdc_result[0];
1487 *pat_rev = pdc_result[1];
1488 *pdc_cap = pdc_result[2];
1490 spin_unlock_irqrestore(&pdc_lock, flags);
1497 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1498 * @pci_addr: PCI configuration space address for which the read request is being made.
1499 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1500 * @mem_addr: Pointer to return memory buffer.
1503 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1506 unsigned long flags;
1508 spin_lock_irqsave(&pdc_lock, flags);
1509 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1510 __pa(pdc_result), pci_addr, pci_size);
1512 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break;
1513 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break;
1514 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break;
1516 spin_unlock_irqrestore(&pdc_lock, flags);
1522 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1523 * @pci_addr: PCI configuration space address for which the write request is being made.
1524 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1525 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1526 * written to PCI Config space.
1529 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1532 unsigned long flags;
1534 spin_lock_irqsave(&pdc_lock, flags);
1535 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1536 pci_addr, pci_size, val);
1537 spin_unlock_irqrestore(&pdc_lock, flags);
1543 * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table
1544 * @rinfo: memory pdt information
1547 int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
1550 unsigned long flags;
1552 spin_lock_irqsave(&pdc_lock, flags);
1553 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO,
1555 if (retval == PDC_OK)
1556 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1557 spin_unlock_irqrestore(&pdc_lock, flags);
1563 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
1565 * @rinfo: memory pdt information
1566 * @cell: cell number
1569 int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
1573 unsigned long flags;
1575 spin_lock_irqsave(&pdc_lock, flags);
1576 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
1577 __pa(&pdc_result), cell);
1578 if (retval == PDC_OK)
1579 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1580 spin_unlock_irqrestore(&pdc_lock, flags);
1586 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
1587 * @pret: array of PDT entries
1588 * @pdt_entries_ptr: ptr to hold number of PDT entries
1589 * @max_entries: maximum number of entries to be read
1592 int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1593 unsigned long *pdt_entries_ptr, unsigned long max_entries)
1596 unsigned long flags, entries;
1598 spin_lock_irqsave(&pdc_lock, flags);
1599 /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
1600 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
1601 __pa(&pdc_result), parisc_cell_num,
1602 __pa(pdt_entries_ptr));
1604 if (retval == PDC_OK) {
1605 /* build up return value as for PDC_PAT_MEM_PD_READ */
1606 entries = min(pdc_result[0], max_entries);
1607 pret->pdt_entries = entries;
1608 pret->actual_count_bytes = entries * sizeof(unsigned long);
1611 spin_unlock_irqrestore(&pdc_lock, flags);
1612 WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries);
1617 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
1618 * @pret: array of PDT entries
1619 * @pdt_entries_ptr: ptr to hold number of PDT entries
1620 * @count: number of bytes to read
1621 * @offset: offset to start (in bytes)
1624 int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1625 unsigned long *pdt_entries_ptr, unsigned long count,
1626 unsigned long offset)
1629 unsigned long flags, entries;
1631 spin_lock_irqsave(&pdc_lock, flags);
1632 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ,
1633 __pa(&pdc_result), __pa(pdt_entries_ptr),
1636 if (retval == PDC_OK) {
1637 entries = min(pdc_result[0], count);
1638 pret->actual_count_bytes = entries;
1639 pret->pdt_entries = entries / sizeof(unsigned long);
1642 spin_unlock_irqrestore(&pdc_lock, flags);
1648 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
1649 * @pret: ptr to hold returned information
1650 * @phys_addr: physical address to examine
1653 int pdc_pat_mem_get_dimm_phys_location(
1654 struct pdc_pat_mem_phys_mem_location *pret,
1655 unsigned long phys_addr)
1658 unsigned long flags;
1660 spin_lock_irqsave(&pdc_lock, flags);
1661 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
1662 __pa(&pdc_result), phys_addr);
1664 if (retval == PDC_OK)
1665 memcpy(pret, &pdc_result, sizeof(*pret));
1667 spin_unlock_irqrestore(&pdc_lock, flags);
1671 #endif /* CONFIG_64BIT */
1672 #endif /* defined(BOOTLOADER) */
1675 /***************** 32-bit real-mode calls ***********/
1676 /* The struct below is used
1677 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1678 * real32_call_asm() then uses this stack in narrow real mode
1681 struct narrow_stack {
1682 /* use int, not long which is 64 bits */
1697 unsigned int frame_marker[8];
1699 /* in reality, there's nearly 8k of stack after this */
1702 long real32_call(unsigned long fn, ...)
1705 extern struct narrow_stack real_stack;
1706 extern unsigned long real32_call_asm(unsigned int *,
1711 real_stack.arg0 = va_arg(args, unsigned int);
1712 real_stack.arg1 = va_arg(args, unsigned int);
1713 real_stack.arg2 = va_arg(args, unsigned int);
1714 real_stack.arg3 = va_arg(args, unsigned int);
1715 real_stack.arg4 = va_arg(args, unsigned int);
1716 real_stack.arg5 = va_arg(args, unsigned int);
1717 real_stack.arg6 = va_arg(args, unsigned int);
1718 real_stack.arg7 = va_arg(args, unsigned int);
1719 real_stack.arg8 = va_arg(args, unsigned int);
1720 real_stack.arg9 = va_arg(args, unsigned int);
1721 real_stack.arg10 = va_arg(args, unsigned int);
1722 real_stack.arg11 = va_arg(args, unsigned int);
1723 real_stack.arg12 = va_arg(args, unsigned int);
1724 real_stack.arg13 = va_arg(args, unsigned int);
1727 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1731 /***************** 64-bit real-mode calls ***********/
1744 unsigned long arg10;
1745 unsigned long arg11;
1746 unsigned long arg12;
1747 unsigned long arg13;
1748 unsigned long frame_marker[2]; /* rp, previous sp */
1750 /* in reality, there's nearly 8k of stack after this */
1753 long real64_call(unsigned long fn, ...)
1756 extern struct wide_stack real64_stack;
1757 extern unsigned long real64_call_asm(unsigned long *,
1762 real64_stack.arg0 = va_arg(args, unsigned long);
1763 real64_stack.arg1 = va_arg(args, unsigned long);
1764 real64_stack.arg2 = va_arg(args, unsigned long);
1765 real64_stack.arg3 = va_arg(args, unsigned long);
1766 real64_stack.arg4 = va_arg(args, unsigned long);
1767 real64_stack.arg5 = va_arg(args, unsigned long);
1768 real64_stack.arg6 = va_arg(args, unsigned long);
1769 real64_stack.arg7 = va_arg(args, unsigned long);
1770 real64_stack.arg8 = va_arg(args, unsigned long);
1771 real64_stack.arg9 = va_arg(args, unsigned long);
1772 real64_stack.arg10 = va_arg(args, unsigned long);
1773 real64_stack.arg11 = va_arg(args, unsigned long);
1774 real64_stack.arg12 = va_arg(args, unsigned long);
1775 real64_stack.arg13 = va_arg(args, unsigned long);
1778 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1781 #endif /* CONFIG_64BIT */