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 PDC documentation at
8 * https://parisc.wiki.kernel.org/index.php/Technical_Documentation
9 * for documentation describing the entry points and calling
10 * conventions defined below.
12 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
13 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
14 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
15 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
16 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
19 /* I think it would be in everyone's best interest to follow this
20 * guidelines when writing PDC wrappers:
22 * - the name of the pdc wrapper should match one of the macros
23 * used for the first two arguments
24 * - don't use caps for random parts of the name
25 * - use the static PDC result buffers and "copyout" to structs
26 * supplied by the caller to encapsulate alignment restrictions
27 * - hold pdc_lock while in PDC or using static result buffers
28 * - use __pa() to convert virtual (kernel) pointers to physical
30 * - the name of the struct used for pdc return values should equal
31 * one of the macros used for the first two arguments to the
32 * corresponding PDC call
33 * - keep the order of arguments
34 * - don't be smart (setting trailing NUL bytes for strings, return
35 * something useful even if the call failed) unless you are sure
36 * it's not going to affect functionality or performance
39 * int pdc_cache_info(struct pdc_cache_info *cache_info )
43 * spin_lock_irq(&pdc_lock);
44 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
45 * convert_to_wide(pdc_result);
46 * memcpy(cache_info, pdc_result, sizeof(*cache_info));
47 * spin_unlock_irq(&pdc_lock);
54 #include <linux/stdarg.h>
56 #include <linux/delay.h>
57 #include <linux/init.h>
58 #include <linux/kernel.h>
59 #include <linux/module.h>
60 #include <linux/string.h>
61 #include <linux/spinlock.h>
65 #include <asm/pdcpat.h>
66 #include <asm/processor.h> /* for boot_cpu_data */
68 #if defined(BOOTLOADER)
69 # undef spin_lock_irqsave
70 # define spin_lock_irqsave(a, b) { b = 1; }
71 # undef spin_unlock_irqrestore
72 # define spin_unlock_irqrestore(a, b)
74 static DEFINE_SPINLOCK(pdc_lock);
77 static unsigned long pdc_result[NUM_PDC_RESULT] __aligned(8);
78 static unsigned long pdc_result2[NUM_PDC_RESULT] __aligned(8);
81 #define WIDE_FIRMWARE 0x1
82 #define NARROW_FIRMWARE 0x2
84 /* Firmware needs to be initially set to narrow to determine the
85 * actual firmware width. */
86 int parisc_narrow_firmware __ro_after_init = 2;
89 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
90 * and MEM_PDC calls are always the same width as the OS.
91 * Some PAT boxes may have 64-bit IODC I/O.
93 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
94 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
95 * This allowed wide kernels to run on Cxxx boxes.
96 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
97 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
101 long real64_call(unsigned long function, ...);
103 long real32_call(unsigned long function, ...);
106 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
107 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
109 # define MEM_PDC (unsigned long)PAGE0->mem_pdc
110 # define mem_pdc_call(args...) real32_call(MEM_PDC, args)
115 * f_extend - Convert PDC addresses to kernel addresses.
116 * @address: Address returned from PDC.
118 * This function is used to convert PDC addresses into kernel addresses
119 * when the PDC address size and kernel address size are different.
121 static unsigned long f_extend(unsigned long address)
124 if(unlikely(parisc_narrow_firmware)) {
125 if((address & 0xff000000) == 0xf0000000)
126 return 0xf0f0f0f000000000UL | (u32)address;
128 if((address & 0xf0000000) == 0xf0000000)
129 return 0xffffffff00000000UL | (u32)address;
136 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
137 * @addr: The return buffer from PDC.
139 * This function is used to convert the return buffer addresses retrieved from PDC
140 * into kernel addresses when the PDC address size and kernel address size are
143 static void convert_to_wide(unsigned long *addr)
147 unsigned int *p = (unsigned int *)addr;
149 if (unlikely(parisc_narrow_firmware)) {
150 for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
157 void set_firmware_width_unlocked(void)
161 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
162 __pa(pdc_result), 0);
165 convert_to_wide(pdc_result);
166 if (pdc_result[0] != NARROW_FIRMWARE)
167 parisc_narrow_firmware = 0;
171 * set_firmware_width - Determine if the firmware is wide or narrow.
173 * This function must be called before any pdc_* function that uses the
174 * convert_to_wide function.
176 void set_firmware_width(void)
180 /* already initialized? */
181 if (parisc_narrow_firmware != 2)
184 spin_lock_irqsave(&pdc_lock, flags);
185 set_firmware_width_unlocked();
186 spin_unlock_irqrestore(&pdc_lock, flags);
189 void set_firmware_width_unlocked(void)
194 void set_firmware_width(void)
198 #endif /*CONFIG_64BIT*/
201 #if !defined(BOOTLOADER)
203 * pdc_emergency_unlock - Unlock the linux pdc lock
205 * This call unlocks the linux pdc lock in case we need some PDC functions
206 * (like pdc_add_valid) during kernel stack dump.
208 void pdc_emergency_unlock(void)
210 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
211 if (spin_is_locked(&pdc_lock))
212 spin_unlock(&pdc_lock);
217 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
218 * @address: Address to be verified.
220 * This PDC call attempts to read from the specified address and verifies
221 * if the address is valid.
223 * The return value is PDC_OK (0) in case accessing this address is valid.
225 int pdc_add_valid(unsigned long address)
230 spin_lock_irqsave(&pdc_lock, flags);
231 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
232 spin_unlock_irqrestore(&pdc_lock, flags);
236 EXPORT_SYMBOL(pdc_add_valid);
239 * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
240 * @instr: Pointer to variable which will get instruction opcode.
242 * The return value is PDC_OK (0) in case call succeeded.
244 int __init pdc_instr(unsigned int *instr)
249 spin_lock_irqsave(&pdc_lock, flags);
250 retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
251 convert_to_wide(pdc_result);
252 *instr = pdc_result[0];
253 spin_unlock_irqrestore(&pdc_lock, flags);
259 * pdc_chassis_info - Return chassis information.
260 * @chassis_info: The memory buffer address.
261 * @led_info: The size of the memory buffer address.
262 * @len: The size of the memory buffer address.
264 * An HVERSION dependent call for returning the chassis information.
266 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
271 spin_lock_irqsave(&pdc_lock, flags);
272 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
273 memcpy(&pdc_result2, led_info, len);
274 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
275 __pa(pdc_result), __pa(pdc_result2), len);
276 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
277 memcpy(led_info, pdc_result2, len);
278 spin_unlock_irqrestore(&pdc_lock, flags);
284 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
285 * @state: state of the machine
286 * @data: value for that state
288 * Must be correctly formatted or expect system crash
291 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
299 spin_lock_irqsave(&pdc_lock, flags);
300 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
301 spin_unlock_irqrestore(&pdc_lock, flags);
308 * pdc_chassis_disp - Updates chassis code
309 * @disp: value to show on display
311 int pdc_chassis_disp(unsigned long disp)
316 spin_lock_irqsave(&pdc_lock, flags);
317 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
318 spin_unlock_irqrestore(&pdc_lock, flags);
324 * __pdc_cpu_rendezvous - Stop currently executing CPU and do not return.
326 int __pdc_cpu_rendezvous(void)
329 return mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_RENDEZVOUS);
331 return mem_pdc_call(PDC_PROC, 1, 0);
335 * pdc_cpu_rendezvous_lock - Lock PDC while transitioning to rendezvous state
337 void pdc_cpu_rendezvous_lock(void) __acquires(&pdc_lock)
339 spin_lock(&pdc_lock);
343 * pdc_cpu_rendezvous_unlock - Unlock PDC after reaching rendezvous state
345 void pdc_cpu_rendezvous_unlock(void) __releases(&pdc_lock)
347 spin_unlock(&pdc_lock);
351 * pdc_pat_get_PDC_entrypoint - Get PDC entry point for current CPU
352 * @pdc_entry: pointer to where the PDC entry point should be stored
354 int pdc_pat_get_PDC_entrypoint(unsigned long *pdc_entry)
359 if (!IS_ENABLED(CONFIG_SMP) || !is_pdc_pat()) {
360 *pdc_entry = MEM_PDC;
364 spin_lock_irqsave(&pdc_lock, flags);
365 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_PDC_ENTRYPOINT,
367 *pdc_entry = pdc_result[0];
368 spin_unlock_irqrestore(&pdc_lock, flags);
373 * pdc_chassis_warn - Fetches chassis warnings
374 * @warn: The warning value to be shown
376 int pdc_chassis_warn(unsigned long *warn)
381 spin_lock_irqsave(&pdc_lock, flags);
382 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
383 *warn = pdc_result[0];
384 spin_unlock_irqrestore(&pdc_lock, flags);
389 int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
393 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
394 convert_to_wide(pdc_result);
395 pdc_coproc_info->ccr_functional = pdc_result[0];
396 pdc_coproc_info->ccr_present = pdc_result[1];
397 pdc_coproc_info->revision = pdc_result[17];
398 pdc_coproc_info->model = pdc_result[18];
404 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
405 * @pdc_coproc_info: Return buffer address.
407 * This PDC call returns the presence and status of all the coprocessors
408 * attached to the processor.
410 int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
415 spin_lock_irqsave(&pdc_lock, flags);
416 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
417 spin_unlock_irqrestore(&pdc_lock, flags);
423 * pdc_iodc_read - Read data from the modules IODC.
424 * @actcnt: The actual number of bytes.
425 * @hpa: The HPA of the module for the iodc read.
426 * @index: The iodc entry point.
427 * @iodc_data: A buffer memory for the iodc options.
428 * @iodc_data_size: Size of the memory buffer.
430 * This PDC call reads from the IODC of the module specified by the hpa
433 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
434 void *iodc_data, unsigned int iodc_data_size)
439 spin_lock_irqsave(&pdc_lock, flags);
440 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
441 index, __pa(pdc_result2), iodc_data_size);
442 convert_to_wide(pdc_result);
443 *actcnt = pdc_result[0];
444 memcpy(iodc_data, pdc_result2, iodc_data_size);
445 spin_unlock_irqrestore(&pdc_lock, flags);
449 EXPORT_SYMBOL(pdc_iodc_read);
452 * pdc_system_map_find_mods - Locate unarchitected modules.
453 * @pdc_mod_info: Return buffer address.
454 * @mod_path: pointer to dev path structure.
455 * @mod_index: fixed address module index.
457 * To locate and identify modules which reside at fixed I/O addresses, which
458 * do not self-identify via architected bus walks.
460 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
461 struct pdc_module_path *mod_path, long mod_index)
466 spin_lock_irqsave(&pdc_lock, flags);
467 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
468 __pa(pdc_result2), mod_index);
469 convert_to_wide(pdc_result);
470 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
471 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
472 spin_unlock_irqrestore(&pdc_lock, flags);
474 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
479 * pdc_system_map_find_addrs - Retrieve additional address ranges.
480 * @pdc_addr_info: Return buffer address.
481 * @mod_index: Fixed address module index.
482 * @addr_index: Address range index.
484 * Retrieve additional information about subsequent address ranges for modules
485 * with multiple address ranges.
487 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
488 long mod_index, long addr_index)
493 spin_lock_irqsave(&pdc_lock, flags);
494 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
495 mod_index, addr_index);
496 convert_to_wide(pdc_result);
497 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
498 spin_unlock_irqrestore(&pdc_lock, flags);
500 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
505 * pdc_model_info - Return model information about the processor.
506 * @model: The return buffer.
508 * Returns the version numbers, identifiers, and capabilities from the processor module.
510 int pdc_model_info(struct pdc_model *model)
515 spin_lock_irqsave(&pdc_lock, flags);
516 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
517 convert_to_wide(pdc_result);
518 memcpy(model, pdc_result, sizeof(*model));
519 spin_unlock_irqrestore(&pdc_lock, flags);
525 * pdc_model_sysmodel - Get the system model name.
526 * @os_id: The operating system ID asked for (an OS_ID_* value)
527 * @name: A char array of at least 81 characters.
529 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
530 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
533 int pdc_model_sysmodel(unsigned int os_id, char *name)
538 spin_lock_irqsave(&pdc_lock, flags);
539 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
541 convert_to_wide(pdc_result);
543 if (retval == PDC_OK) {
544 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
548 spin_unlock_irqrestore(&pdc_lock, flags);
554 * pdc_model_versions - Identify the version number of each processor.
555 * @versions: The return buffer.
556 * @id: The id of the processor to check.
558 * Returns the version number for each processor component.
560 * This comment was here before, but I do not know what it means :( -RB
561 * id: 0 = cpu revision, 1 = boot-rom-version
563 int pdc_model_versions(unsigned long *versions, int id)
568 spin_lock_irqsave(&pdc_lock, flags);
569 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
570 convert_to_wide(pdc_result);
571 *versions = pdc_result[0];
572 spin_unlock_irqrestore(&pdc_lock, flags);
578 * pdc_model_cpuid - Returns the CPU_ID.
579 * @cpu_id: The return buffer.
581 * Returns the CPU_ID value which uniquely identifies the cpu portion of
582 * the processor module.
584 int pdc_model_cpuid(unsigned long *cpu_id)
589 spin_lock_irqsave(&pdc_lock, flags);
590 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
591 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
592 convert_to_wide(pdc_result);
593 *cpu_id = pdc_result[0];
594 spin_unlock_irqrestore(&pdc_lock, flags);
600 * pdc_model_capabilities - Returns the platform capabilities.
601 * @capabilities: The return buffer.
603 * Returns information about platform support for 32- and/or 64-bit
604 * OSes, IO-PDIR coherency, and virtual aliasing.
606 int pdc_model_capabilities(unsigned long *capabilities)
611 spin_lock_irqsave(&pdc_lock, flags);
612 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
613 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
614 convert_to_wide(pdc_result);
615 if (retval == PDC_OK) {
616 *capabilities = pdc_result[0];
618 *capabilities = PDC_MODEL_OS32;
620 spin_unlock_irqrestore(&pdc_lock, flags);
626 * pdc_model_platform_info - Returns machine product and serial number.
627 * @orig_prod_num: Return buffer for original product number.
628 * @current_prod_num: Return buffer for current product number.
629 * @serial_no: Return buffer for serial number.
631 * Returns strings containing the original and current product numbers and the
632 * serial number of the system.
634 int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num,
640 spin_lock_irqsave(&pdc_lock, flags);
641 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO,
642 __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no));
643 convert_to_wide(pdc_result);
644 spin_unlock_irqrestore(&pdc_lock, flags);
650 * pdc_cache_info - Return cache and TLB information.
651 * @cache_info: The return buffer.
653 * Returns information about the processor's cache and TLB.
655 int pdc_cache_info(struct pdc_cache_info *cache_info)
660 spin_lock_irqsave(&pdc_lock, flags);
661 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
662 convert_to_wide(pdc_result);
663 memcpy(cache_info, pdc_result, sizeof(*cache_info));
664 spin_unlock_irqrestore(&pdc_lock, flags);
670 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
671 * @space_bits: Should be 0, if not, bad mojo!
673 * Returns information about Space ID hashing.
675 int pdc_spaceid_bits(unsigned long *space_bits)
680 spin_lock_irqsave(&pdc_lock, flags);
682 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
683 convert_to_wide(pdc_result);
684 *space_bits = pdc_result[0];
685 spin_unlock_irqrestore(&pdc_lock, flags);
692 * pdc_btlb_info - Return block TLB information.
693 * @btlb: The return buffer.
695 * Returns information about the hardware Block TLB.
697 int pdc_btlb_info(struct pdc_btlb_info *btlb)
702 spin_lock_irqsave(&pdc_lock, flags);
703 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
704 memcpy(btlb, pdc_result, sizeof(*btlb));
705 spin_unlock_irqrestore(&pdc_lock, flags);
714 * pdc_mem_map_hpa - Find fixed module information.
715 * @address: The return buffer
716 * @mod_path: pointer to dev path structure.
718 * This call was developed for S700 workstations to allow the kernel to find
719 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
720 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
723 * This call is supported by all existing S700 workstations (up to Gecko).
725 int pdc_mem_map_hpa(struct pdc_memory_map *address,
726 struct pdc_module_path *mod_path)
731 spin_lock_irqsave(&pdc_lock, flags);
732 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
733 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
735 memcpy(address, pdc_result, sizeof(*address));
736 spin_unlock_irqrestore(&pdc_lock, flags);
740 #endif /* !CONFIG_PA20 */
743 * pdc_lan_station_id - Get the LAN address.
744 * @lan_addr: The return buffer.
745 * @hpa: The network device HPA.
747 * Get the LAN station address when it is not directly available from the LAN hardware.
749 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
754 spin_lock_irqsave(&pdc_lock, flags);
755 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
756 __pa(pdc_result), hpa);
758 /* FIXME: else read MAC from NVRAM */
759 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
761 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
763 spin_unlock_irqrestore(&pdc_lock, flags);
767 EXPORT_SYMBOL(pdc_lan_station_id);
770 * pdc_stable_read - Read data from Stable Storage.
771 * @staddr: Stable Storage address to access.
772 * @memaddr: The memory address where Stable Storage data shall be copied.
773 * @count: number of bytes to transfer. count is multiple of 4.
775 * This PDC call reads from the Stable Storage address supplied in staddr
776 * and copies count bytes to the memory address memaddr.
777 * The call will fail if staddr+count > PDC_STABLE size.
779 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
784 spin_lock_irqsave(&pdc_lock, flags);
785 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
786 __pa(pdc_result), count);
787 convert_to_wide(pdc_result);
788 memcpy(memaddr, pdc_result, count);
789 spin_unlock_irqrestore(&pdc_lock, flags);
793 EXPORT_SYMBOL(pdc_stable_read);
796 * pdc_stable_write - Write data to Stable Storage.
797 * @staddr: Stable Storage address to access.
798 * @memaddr: The memory address where Stable Storage data shall be read from.
799 * @count: number of bytes to transfer. count is multiple of 4.
801 * This PDC call reads count bytes from the supplied memaddr address,
802 * and copies count bytes to the Stable Storage address staddr.
803 * The call will fail if staddr+count > PDC_STABLE size.
805 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
810 spin_lock_irqsave(&pdc_lock, flags);
811 memcpy(pdc_result, memaddr, count);
812 convert_to_wide(pdc_result);
813 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
814 __pa(pdc_result), count);
815 spin_unlock_irqrestore(&pdc_lock, flags);
819 EXPORT_SYMBOL(pdc_stable_write);
822 * pdc_stable_get_size - Get Stable Storage size in bytes.
823 * @size: pointer where the size will be stored.
825 * This PDC call returns the number of bytes in the processor's Stable
826 * Storage, which is the number of contiguous bytes implemented in Stable
827 * Storage starting from staddr=0. size in an unsigned 64-bit integer
828 * which is a multiple of four.
830 int pdc_stable_get_size(unsigned long *size)
835 spin_lock_irqsave(&pdc_lock, flags);
836 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
837 *size = pdc_result[0];
838 spin_unlock_irqrestore(&pdc_lock, flags);
842 EXPORT_SYMBOL(pdc_stable_get_size);
845 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
847 * This PDC call is meant to be used to check the integrity of the current
848 * contents of Stable Storage.
850 int pdc_stable_verify_contents(void)
855 spin_lock_irqsave(&pdc_lock, flags);
856 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
857 spin_unlock_irqrestore(&pdc_lock, flags);
861 EXPORT_SYMBOL(pdc_stable_verify_contents);
864 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
865 * the validity indicator.
867 * This PDC call will erase all contents of Stable Storage. Use with care!
869 int pdc_stable_initialize(void)
874 spin_lock_irqsave(&pdc_lock, flags);
875 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
876 spin_unlock_irqrestore(&pdc_lock, flags);
880 EXPORT_SYMBOL(pdc_stable_initialize);
883 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
884 * @hwpath: fully bc.mod style path to the device.
885 * @initiator: the array to return the result into
887 * Get the SCSI operational parameters from PDC.
888 * Needed since HPUX never used BIOS or symbios card NVRAM.
889 * Most ncr/sym cards won't have an entry and just use whatever
890 * capabilities of the card are (eg Ultra, LVD). But there are
891 * several cases where it's useful:
892 * o set SCSI id for Multi-initiator clusters,
893 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
894 * o bus width exported is less than what the interface chip supports.
896 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
901 spin_lock_irqsave(&pdc_lock, flags);
903 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
904 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
905 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
907 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
908 __pa(pdc_result), __pa(hwpath));
912 if (pdc_result[0] < 16) {
913 initiator->host_id = pdc_result[0];
915 initiator->host_id = -1;
919 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
920 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
922 switch (pdc_result[1]) {
923 case 1: initiator->factor = 50; break;
924 case 2: initiator->factor = 25; break;
925 case 5: initiator->factor = 12; break;
926 case 25: initiator->factor = 10; break;
927 case 20: initiator->factor = 12; break;
928 case 40: initiator->factor = 10; break;
929 default: initiator->factor = -1; break;
932 if (IS_SPROCKETS()) {
933 initiator->width = pdc_result[4];
934 initiator->mode = pdc_result[5];
936 initiator->width = -1;
937 initiator->mode = -1;
941 spin_unlock_irqrestore(&pdc_lock, flags);
943 return (retval >= PDC_OK);
945 EXPORT_SYMBOL(pdc_get_initiator);
949 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
950 * @num_entries: The return value.
951 * @hpa: The HPA for the device.
953 * This PDC function returns the number of entries in the specified cell's
955 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
957 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
962 spin_lock_irqsave(&pdc_lock, flags);
963 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
964 __pa(pdc_result), hpa);
965 convert_to_wide(pdc_result);
966 *num_entries = pdc_result[0];
967 spin_unlock_irqrestore(&pdc_lock, flags);
973 * pdc_pci_irt - Get the PCI interrupt routing table.
974 * @num_entries: The number of entries in the table.
975 * @hpa: The Hard Physical Address of the device.
978 * Get the PCI interrupt routing table for the device at the given HPA.
979 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
981 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
986 BUG_ON((unsigned long)tbl & 0x7);
988 spin_lock_irqsave(&pdc_lock, flags);
989 pdc_result[0] = num_entries;
990 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
991 __pa(pdc_result), hpa, __pa(tbl));
992 spin_unlock_irqrestore(&pdc_lock, flags);
998 #if 0 /* UNTEST CODE - left here in case someone needs it */
1001 * pdc_pci_config_read - read PCI config space.
1002 * @hpa: Token from PDC to indicate which PCI device
1003 * @cfg_addr: Configuration space address to read from
1005 * Read PCI Configuration space *before* linux PCI subsystem is running.
1007 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
1010 unsigned long flags;
1012 spin_lock_irqsave(&pdc_lock, flags);
1015 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
1016 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
1017 spin_unlock_irqrestore(&pdc_lock, flags);
1019 return retval ? ~0 : (unsigned int) pdc_result[0];
1024 * pdc_pci_config_write - read PCI config space.
1025 * @hpa: Token from PDC to indicate which PCI device
1026 * @cfg_addr: Configuration space address to write
1027 * @val: Value we want in the 32-bit register
1029 * Write PCI Configuration space *before* linux PCI subsystem is running.
1031 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
1034 unsigned long flags;
1036 spin_lock_irqsave(&pdc_lock, flags);
1038 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
1039 __pa(pdc_result), hpa,
1040 cfg_addr&~3UL, 4UL, (unsigned long) val);
1041 spin_unlock_irqrestore(&pdc_lock, flags);
1045 #endif /* UNTESTED CODE */
1048 * pdc_tod_read - Read the Time-Of-Day clock.
1049 * @tod: The return buffer:
1051 * Read the Time-Of-Day clock
1053 int pdc_tod_read(struct pdc_tod *tod)
1056 unsigned long flags;
1058 spin_lock_irqsave(&pdc_lock, flags);
1059 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
1060 convert_to_wide(pdc_result);
1061 memcpy(tod, pdc_result, sizeof(*tod));
1062 spin_unlock_irqrestore(&pdc_lock, flags);
1066 EXPORT_SYMBOL(pdc_tod_read);
1068 int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo)
1071 unsigned long flags;
1073 spin_lock_irqsave(&pdc_lock, flags);
1074 retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0);
1075 convert_to_wide(pdc_result);
1076 memcpy(rinfo, pdc_result, sizeof(*rinfo));
1077 spin_unlock_irqrestore(&pdc_lock, flags);
1082 int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
1083 unsigned long *pdt_entries_ptr)
1086 unsigned long flags;
1088 spin_lock_irqsave(&pdc_lock, flags);
1089 retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
1090 __pa(pdt_entries_ptr));
1091 if (retval == PDC_OK) {
1092 convert_to_wide(pdc_result);
1093 memcpy(pret, pdc_result, sizeof(*pret));
1095 spin_unlock_irqrestore(&pdc_lock, flags);
1099 * 64-bit kernels should not call this PDT function in narrow mode.
1100 * The pdt_entries_ptr array above will now contain 32-bit values
1102 if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
1110 * pdc_pim_toc11 - Fetch TOC PIM 1.1 data from firmware.
1111 * @ret: pointer to return buffer
1113 int pdc_pim_toc11(struct pdc_toc_pim_11 *ret)
1116 unsigned long flags;
1118 spin_lock_irqsave(&pdc_lock, flags);
1119 retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
1120 __pa(ret), sizeof(*ret));
1121 spin_unlock_irqrestore(&pdc_lock, flags);
1126 * pdc_pim_toc20 - Fetch TOC PIM 2.0 data from firmware.
1127 * @ret: pointer to return buffer
1129 int pdc_pim_toc20(struct pdc_toc_pim_20 *ret)
1132 unsigned long flags;
1134 spin_lock_irqsave(&pdc_lock, flags);
1135 retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
1136 __pa(ret), sizeof(*ret));
1137 spin_unlock_irqrestore(&pdc_lock, flags);
1142 * pdc_tod_set - Set the Time-Of-Day clock.
1143 * @sec: The number of seconds since epoch.
1144 * @usec: The number of micro seconds.
1146 * Set the Time-Of-Day clock.
1148 int pdc_tod_set(unsigned long sec, unsigned long usec)
1151 unsigned long flags;
1153 spin_lock_irqsave(&pdc_lock, flags);
1154 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
1155 spin_unlock_irqrestore(&pdc_lock, flags);
1159 EXPORT_SYMBOL(pdc_tod_set);
1162 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
1163 struct pdc_memory_table *tbl, unsigned long entries)
1166 unsigned long flags;
1168 spin_lock_irqsave(&pdc_lock, flags);
1169 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
1170 convert_to_wide(pdc_result);
1171 memcpy(r_addr, pdc_result, sizeof(*r_addr));
1172 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
1173 spin_unlock_irqrestore(&pdc_lock, flags);
1177 #endif /* CONFIG_64BIT */
1179 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
1180 * so I guessed at unsigned long. Someone who knows what this does, can fix
1183 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1186 unsigned long flags;
1188 spin_lock_irqsave(&pdc_lock, flags);
1189 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1190 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1191 spin_unlock_irqrestore(&pdc_lock, flags);
1197 * pdc_do_reset - Reset the system.
1201 int pdc_do_reset(void)
1204 unsigned long flags;
1206 spin_lock_irqsave(&pdc_lock, flags);
1207 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1208 spin_unlock_irqrestore(&pdc_lock, flags);
1214 * pdc_soft_power_info - Enable soft power switch.
1215 * @power_reg: address of soft power register
1217 * Return the absolute address of the soft power switch register
1219 int __init pdc_soft_power_info(unsigned long *power_reg)
1222 unsigned long flags;
1224 *power_reg = (unsigned long) (-1);
1226 spin_lock_irqsave(&pdc_lock, flags);
1227 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1228 if (retval == PDC_OK) {
1229 convert_to_wide(pdc_result);
1230 *power_reg = f_extend(pdc_result[0]);
1232 spin_unlock_irqrestore(&pdc_lock, flags);
1238 * pdc_soft_power_button{_panic} - Control the soft power button behaviour
1239 * @sw_control: 0 for hardware control, 1 for software control
1242 * This PDC function places the soft power button under software or
1244 * Under software control the OS may control to when to allow to shut
1245 * down the system. Under hardware control pressing the power button
1246 * powers off the system immediately.
1248 * The _panic version relies on spin_trylock to prevent deadlock
1251 int pdc_soft_power_button(int sw_control)
1254 unsigned long flags;
1256 spin_lock_irqsave(&pdc_lock, flags);
1257 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1258 spin_unlock_irqrestore(&pdc_lock, flags);
1263 int pdc_soft_power_button_panic(int sw_control)
1266 unsigned long flags;
1268 if (!spin_trylock_irqsave(&pdc_lock, flags)) {
1269 pr_emerg("Couldn't enable soft power button\n");
1270 return -EBUSY; /* ignored by the panic notifier */
1273 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1274 spin_unlock_irqrestore(&pdc_lock, flags);
1280 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1281 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1282 * who knows what other platform firmware might do with this OS "hook".
1284 void pdc_io_reset(void)
1286 unsigned long flags;
1288 spin_lock_irqsave(&pdc_lock, flags);
1289 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1290 spin_unlock_irqrestore(&pdc_lock, flags);
1294 * pdc_io_reset_devices - Hack to Stop USB controller
1296 * If PDC used the usb controller, the usb controller
1297 * is still running and will crash the machines during iommu
1298 * setup, because of still running DMA. This PDC call
1299 * stops the USB controller.
1300 * Normally called after calling pdc_io_reset().
1302 void pdc_io_reset_devices(void)
1304 unsigned long flags;
1306 spin_lock_irqsave(&pdc_lock, flags);
1307 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1308 spin_unlock_irqrestore(&pdc_lock, flags);
1311 #endif /* defined(BOOTLOADER) */
1313 /* locked by pdc_lock */
1314 static char iodc_dbuf[4096] __page_aligned_bss;
1317 * pdc_iodc_print - Console print using IODC.
1318 * @str: the string to output.
1319 * @count: length of str
1321 * Note that only these special chars are architected for console IODC io:
1322 * BEL, BS, CR, and LF. Others are passed through.
1323 * Since the HP console requires CR+LF to perform a 'newline', we translate
1326 int pdc_iodc_print(const unsigned char *str, unsigned count)
1328 unsigned int i, found = 0;
1329 unsigned long flags;
1331 count = min_t(unsigned int, count, sizeof(iodc_dbuf));
1333 spin_lock_irqsave(&pdc_lock, flags);
1334 for (i = 0; i < count;) {
1337 iodc_dbuf[i+0] = '\r';
1338 iodc_dbuf[i+1] = '\n';
1343 iodc_dbuf[i] = str[i];
1350 real32_call(PAGE0->mem_cons.iodc_io,
1351 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1352 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1353 __pa(pdc_result), 0, __pa(iodc_dbuf), i, 0);
1354 spin_unlock_irqrestore(&pdc_lock, flags);
1359 #if !defined(BOOTLOADER)
1361 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1363 * Read a character (non-blocking) from the PDC console, returns -1 if
1364 * key is not present.
1366 int pdc_iodc_getc(void)
1370 unsigned long flags;
1372 /* Bail if no console input device. */
1373 if (!PAGE0->mem_kbd.iodc_io)
1376 /* wait for a keyboard (rs232)-input */
1377 spin_lock_irqsave(&pdc_lock, flags);
1378 real32_call(PAGE0->mem_kbd.iodc_io,
1379 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1380 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1381 __pa(pdc_result), 0, __pa(iodc_dbuf), 1, 0);
1384 /* like convert_to_wide() but for first return value only: */
1385 status = *(int *)&pdc_result;
1386 spin_unlock_irqrestore(&pdc_lock, flags);
1394 int pdc_sti_call(unsigned long func, unsigned long flags,
1395 unsigned long inptr, unsigned long outputr,
1396 unsigned long glob_cfg, int do_call64)
1399 unsigned long irqflags;
1401 spin_lock_irqsave(&pdc_lock, irqflags);
1402 if (IS_ENABLED(CONFIG_64BIT) && do_call64) {
1404 retval = real64_call(func, flags, inptr, outputr, glob_cfg);
1409 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1411 spin_unlock_irqrestore(&pdc_lock, irqflags);
1415 EXPORT_SYMBOL(pdc_sti_call);
1419 * pdc_pat_cell_get_number - Returns the cell number.
1420 * @cell_info: The return buffer.
1422 * This PDC call returns the cell number of the cell from which the call
1425 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1428 unsigned long flags;
1430 spin_lock_irqsave(&pdc_lock, flags);
1431 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1432 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1433 spin_unlock_irqrestore(&pdc_lock, flags);
1439 * pdc_pat_cell_module - Retrieve the cell's module information.
1440 * @actcnt: The number of bytes written to mem_addr.
1441 * @ploc: The physical location.
1442 * @mod: The module index.
1443 * @view_type: The view of the address type.
1444 * @mem_addr: The return buffer.
1446 * This PDC call returns information about each module attached to the cell
1447 * at the specified location.
1449 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1450 unsigned long view_type, void *mem_addr)
1453 unsigned long flags;
1454 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1456 spin_lock_irqsave(&pdc_lock, flags);
1457 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1458 ploc, mod, view_type, __pa(&result));
1460 *actcnt = pdc_result[0];
1461 memcpy(mem_addr, &result, *actcnt);
1463 spin_unlock_irqrestore(&pdc_lock, flags);
1469 * pdc_pat_cell_info - Retrieve the cell's information.
1470 * @info: The pointer to a struct pdc_pat_cell_info_rtn_block.
1471 * @actcnt: The number of bytes which should be written to info.
1472 * @offset: offset of the structure.
1473 * @cell_number: The cell number which should be asked, or -1 for current cell.
1475 * This PDC call returns information about the given cell (or all cells).
1477 int pdc_pat_cell_info(struct pdc_pat_cell_info_rtn_block *info,
1478 unsigned long *actcnt, unsigned long offset,
1479 unsigned long cell_number)
1482 unsigned long flags;
1483 struct pdc_pat_cell_info_rtn_block result;
1485 spin_lock_irqsave(&pdc_lock, flags);
1486 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_INFO,
1487 __pa(pdc_result), __pa(&result), *actcnt,
1488 offset, cell_number);
1490 *actcnt = pdc_result[0];
1491 memcpy(info, &result, *actcnt);
1493 spin_unlock_irqrestore(&pdc_lock, flags);
1499 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1500 * @cpu_info: The return buffer.
1501 * @hpa: The Hard Physical Address of the CPU.
1503 * Retrieve the cpu number for the cpu at the specified HPA.
1505 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa)
1508 unsigned long flags;
1510 spin_lock_irqsave(&pdc_lock, flags);
1511 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1512 __pa(&pdc_result), hpa);
1513 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1514 spin_unlock_irqrestore(&pdc_lock, flags);
1520 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1521 * @num_entries: The return value.
1522 * @cell_num: The target cell.
1524 * This PDC function returns the number of entries in the specified cell's
1527 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1530 unsigned long flags;
1532 spin_lock_irqsave(&pdc_lock, flags);
1533 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1534 __pa(pdc_result), cell_num);
1535 *num_entries = pdc_result[0];
1536 spin_unlock_irqrestore(&pdc_lock, flags);
1542 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1543 * @r_addr: The return buffer.
1544 * @cell_num: The target cell.
1546 * This PDC function returns the actual interrupt table for the specified cell.
1548 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1551 unsigned long flags;
1553 spin_lock_irqsave(&pdc_lock, flags);
1554 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1555 __pa(r_addr), cell_num);
1556 spin_unlock_irqrestore(&pdc_lock, flags);
1562 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1563 * @actual_len: The return buffer.
1564 * @mem_addr: Pointer to the memory buffer.
1565 * @count: The number of bytes to read from the buffer.
1566 * @offset: The offset with respect to the beginning of the buffer.
1569 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1570 unsigned long count, unsigned long offset)
1573 unsigned long flags;
1575 spin_lock_irqsave(&pdc_lock, flags);
1576 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1577 __pa(pdc_result2), count, offset);
1578 *actual_len = pdc_result[0];
1579 memcpy(mem_addr, pdc_result2, *actual_len);
1580 spin_unlock_irqrestore(&pdc_lock, flags);
1586 * pdc_pat_pd_get_pdc_revisions - Retrieve PDC interface revisions.
1587 * @legacy_rev: The legacy revision.
1588 * @pat_rev: The PAT revision.
1589 * @pdc_cap: The PDC capabilities.
1592 int pdc_pat_pd_get_pdc_revisions(unsigned long *legacy_rev,
1593 unsigned long *pat_rev, unsigned long *pdc_cap)
1596 unsigned long flags;
1598 spin_lock_irqsave(&pdc_lock, flags);
1599 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_PDC_INTERF_REV,
1601 if (retval == PDC_OK) {
1602 *legacy_rev = pdc_result[0];
1603 *pat_rev = pdc_result[1];
1604 *pdc_cap = pdc_result[2];
1606 spin_unlock_irqrestore(&pdc_lock, flags);
1613 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1614 * @pci_addr: PCI configuration space address for which the read request is being made.
1615 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1616 * @mem_addr: Pointer to return memory buffer.
1619 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1622 unsigned long flags;
1624 spin_lock_irqsave(&pdc_lock, flags);
1625 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1626 __pa(pdc_result), pci_addr, pci_size);
1628 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break;
1629 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break;
1630 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break;
1632 spin_unlock_irqrestore(&pdc_lock, flags);
1638 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1639 * @pci_addr: PCI configuration space address for which the write request is being made.
1640 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1641 * @val: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1642 * written to PCI Config space.
1645 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1648 unsigned long flags;
1650 spin_lock_irqsave(&pdc_lock, flags);
1651 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1652 pci_addr, pci_size, val);
1653 spin_unlock_irqrestore(&pdc_lock, flags);
1659 * pdc_pat_mem_pdt_info - Retrieve information about page deallocation table
1660 * @rinfo: memory pdt information
1663 int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
1666 unsigned long flags;
1668 spin_lock_irqsave(&pdc_lock, flags);
1669 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO,
1671 if (retval == PDC_OK)
1672 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1673 spin_unlock_irqrestore(&pdc_lock, flags);
1679 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
1681 * @rinfo: memory pdt information
1682 * @cell: cell number
1685 int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
1689 unsigned long flags;
1691 spin_lock_irqsave(&pdc_lock, flags);
1692 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
1693 __pa(&pdc_result), cell);
1694 if (retval == PDC_OK)
1695 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1696 spin_unlock_irqrestore(&pdc_lock, flags);
1702 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
1703 * @pret: array of PDT entries
1704 * @pdt_entries_ptr: ptr to hold number of PDT entries
1705 * @max_entries: maximum number of entries to be read
1708 int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1709 unsigned long *pdt_entries_ptr, unsigned long max_entries)
1712 unsigned long flags, entries;
1714 spin_lock_irqsave(&pdc_lock, flags);
1715 /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
1716 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
1717 __pa(&pdc_result), parisc_cell_num,
1718 __pa(pdt_entries_ptr));
1720 if (retval == PDC_OK) {
1721 /* build up return value as for PDC_PAT_MEM_PD_READ */
1722 entries = min(pdc_result[0], max_entries);
1723 pret->pdt_entries = entries;
1724 pret->actual_count_bytes = entries * sizeof(unsigned long);
1727 spin_unlock_irqrestore(&pdc_lock, flags);
1728 WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries);
1733 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
1734 * @pret: array of PDT entries
1735 * @pdt_entries_ptr: ptr to hold number of PDT entries
1736 * @count: number of bytes to read
1737 * @offset: offset to start (in bytes)
1740 int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1741 unsigned long *pdt_entries_ptr, unsigned long count,
1742 unsigned long offset)
1745 unsigned long flags, entries;
1747 spin_lock_irqsave(&pdc_lock, flags);
1748 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ,
1749 __pa(&pdc_result), __pa(pdt_entries_ptr),
1752 if (retval == PDC_OK) {
1753 entries = min(pdc_result[0], count);
1754 pret->actual_count_bytes = entries;
1755 pret->pdt_entries = entries / sizeof(unsigned long);
1758 spin_unlock_irqrestore(&pdc_lock, flags);
1764 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
1765 * @pret: ptr to hold returned information
1766 * @phys_addr: physical address to examine
1769 int pdc_pat_mem_get_dimm_phys_location(
1770 struct pdc_pat_mem_phys_mem_location *pret,
1771 unsigned long phys_addr)
1774 unsigned long flags;
1776 spin_lock_irqsave(&pdc_lock, flags);
1777 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
1778 __pa(&pdc_result), phys_addr);
1780 if (retval == PDC_OK)
1781 memcpy(pret, &pdc_result, sizeof(*pret));
1783 spin_unlock_irqrestore(&pdc_lock, flags);
1787 #endif /* CONFIG_64BIT */
1788 #endif /* defined(BOOTLOADER) */
1791 /***************** 32-bit real-mode calls ***********/
1792 /* The struct below is used
1793 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1794 * real32_call_asm() then uses this stack in narrow real mode
1797 struct narrow_stack {
1798 /* use int, not long which is 64 bits */
1813 unsigned int frame_marker[8];
1815 /* in reality, there's nearly 8k of stack after this */
1818 long real32_call(unsigned long fn, ...)
1821 extern struct narrow_stack real_stack;
1822 extern unsigned long real32_call_asm(unsigned int *,
1827 real_stack.arg0 = va_arg(args, unsigned int);
1828 real_stack.arg1 = va_arg(args, unsigned int);
1829 real_stack.arg2 = va_arg(args, unsigned int);
1830 real_stack.arg3 = va_arg(args, unsigned int);
1831 real_stack.arg4 = va_arg(args, unsigned int);
1832 real_stack.arg5 = va_arg(args, unsigned int);
1833 real_stack.arg6 = va_arg(args, unsigned int);
1834 real_stack.arg7 = va_arg(args, unsigned int);
1835 real_stack.arg8 = va_arg(args, unsigned int);
1836 real_stack.arg9 = va_arg(args, unsigned int);
1837 real_stack.arg10 = va_arg(args, unsigned int);
1838 real_stack.arg11 = va_arg(args, unsigned int);
1839 real_stack.arg12 = va_arg(args, unsigned int);
1840 real_stack.arg13 = va_arg(args, unsigned int);
1843 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1847 /***************** 64-bit real-mode calls ***********/
1860 unsigned long arg10;
1861 unsigned long arg11;
1862 unsigned long arg12;
1863 unsigned long arg13;
1864 unsigned long frame_marker[2]; /* rp, previous sp */
1866 /* in reality, there's nearly 8k of stack after this */
1869 long real64_call(unsigned long fn, ...)
1872 extern struct wide_stack real64_stack;
1873 extern unsigned long real64_call_asm(unsigned long *,
1878 real64_stack.arg0 = va_arg(args, unsigned long);
1879 real64_stack.arg1 = va_arg(args, unsigned long);
1880 real64_stack.arg2 = va_arg(args, unsigned long);
1881 real64_stack.arg3 = va_arg(args, unsigned long);
1882 real64_stack.arg4 = va_arg(args, unsigned long);
1883 real64_stack.arg5 = va_arg(args, unsigned long);
1884 real64_stack.arg6 = va_arg(args, unsigned long);
1885 real64_stack.arg7 = va_arg(args, unsigned long);
1886 real64_stack.arg8 = va_arg(args, unsigned long);
1887 real64_stack.arg9 = va_arg(args, unsigned long);
1888 real64_stack.arg10 = va_arg(args, unsigned long);
1889 real64_stack.arg11 = va_arg(args, unsigned long);
1890 real64_stack.arg12 = va_arg(args, unsigned long);
1891 real64_stack.arg13 = va_arg(args, unsigned long);
1894 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1897 #endif /* CONFIG_64BIT */