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/system.h>
71 #include <asm/processor.h> /* for boot_cpu_data */
73 static DEFINE_SPINLOCK(pdc_lock);
74 static unsigned long pdc_result[32] __attribute__ ((aligned (8)));
75 static unsigned long pdc_result2[32] __attribute__ ((aligned (8)));
78 #define WIDE_FIRMWARE 0x1
79 #define NARROW_FIRMWARE 0x2
81 /* Firmware needs to be initially set to narrow to determine the
82 * actual firmware width. */
83 int parisc_narrow_firmware __read_mostly = 1;
86 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
87 * and MEM_PDC calls are always the same width as the OS.
88 * Some PAT boxes may have 64-bit IODC I/O.
90 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
91 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
92 * This allowed wide kernels to run on Cxxx boxes.
93 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
94 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
98 long real64_call(unsigned long function, ...);
100 long real32_call(unsigned long function, ...);
103 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
104 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
106 # define MEM_PDC (unsigned long)PAGE0->mem_pdc
107 # define mem_pdc_call(args...) real32_call(MEM_PDC, args)
112 * f_extend - Convert PDC addresses to kernel addresses.
113 * @address: Address returned from PDC.
115 * This function is used to convert PDC addresses into kernel addresses
116 * when the PDC address size and kernel address size are different.
118 static unsigned long f_extend(unsigned long address)
121 if(unlikely(parisc_narrow_firmware)) {
122 if((address & 0xff000000) == 0xf0000000)
123 return 0xf0f0f0f000000000UL | (u32)address;
125 if((address & 0xf0000000) == 0xf0000000)
126 return 0xffffffff00000000UL | (u32)address;
133 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
134 * @address: The return buffer from PDC.
136 * This function is used to convert the return buffer addresses retrieved from PDC
137 * into kernel addresses when the PDC address size and kernel address size are
140 static void convert_to_wide(unsigned long *addr)
144 unsigned int *p = (unsigned int *)addr;
146 if(unlikely(parisc_narrow_firmware)) {
147 for(i = 31; i >= 0; --i)
154 * set_firmware_width - Determine if the firmware is wide or narrow.
156 * This function must be called before any pdc_* function that uses the convert_to_wide
159 void __init set_firmware_width(void)
164 spin_lock_irq(&pdc_lock);
165 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
166 convert_to_wide(pdc_result);
167 if(pdc_result[0] != NARROW_FIRMWARE)
168 parisc_narrow_firmware = 0;
169 spin_unlock_irq(&pdc_lock);
174 * pdc_emergency_unlock - Unlock the linux pdc lock
176 * This call unlocks the linux pdc lock in case we need some PDC functions
177 * (like pdc_add_valid) during kernel stack dump.
179 void pdc_emergency_unlock(void)
181 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
182 if (spin_is_locked(&pdc_lock))
183 spin_unlock(&pdc_lock);
188 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
189 * @address: Address to be verified.
191 * This PDC call attempts to read from the specified address and verifies
192 * if the address is valid.
194 * The return value is PDC_OK (0) in case accessing this address is valid.
196 int pdc_add_valid(unsigned long address)
200 spin_lock_irq(&pdc_lock);
201 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
202 spin_unlock_irq(&pdc_lock);
206 EXPORT_SYMBOL(pdc_add_valid);
209 * pdc_chassis_info - Return chassis information.
210 * @result: The return buffer.
211 * @chassis_info: The memory buffer address.
212 * @len: The size of the memory buffer address.
214 * An HVERSION dependent call for returning the chassis information.
216 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
220 spin_lock_irq(&pdc_lock);
221 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
222 memcpy(&pdc_result2, led_info, len);
223 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
224 __pa(pdc_result), __pa(pdc_result2), len);
225 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
226 memcpy(led_info, pdc_result2, len);
227 spin_unlock_irq(&pdc_lock);
233 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
234 * @retval: -1 on error, 0 on success. Other value are PDC errors
236 * Must be correctly formatted or expect system crash
239 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
246 spin_lock_irq(&pdc_lock);
247 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
248 spin_unlock_irq(&pdc_lock);
255 * pdc_chassis_disp - Updates chassis code
256 * @retval: -1 on error, 0 on success
258 int pdc_chassis_disp(unsigned long disp)
262 spin_lock_irq(&pdc_lock);
263 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
264 spin_unlock_irq(&pdc_lock);
270 * pdc_chassis_warn - Fetches chassis warnings
271 * @retval: -1 on error, 0 on success
273 int pdc_chassis_warn(unsigned long *warn)
277 spin_lock_irq(&pdc_lock);
278 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
279 *warn = pdc_result[0];
280 spin_unlock_irq(&pdc_lock);
286 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
287 * @pdc_coproc_info: Return buffer address.
289 * This PDC call returns the presence and status of all the coprocessors
290 * attached to the processor.
292 int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
296 spin_lock_irq(&pdc_lock);
297 retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
298 convert_to_wide(pdc_result);
299 pdc_coproc_info->ccr_functional = pdc_result[0];
300 pdc_coproc_info->ccr_present = pdc_result[1];
301 pdc_coproc_info->revision = pdc_result[17];
302 pdc_coproc_info->model = pdc_result[18];
303 spin_unlock_irq(&pdc_lock);
309 * pdc_iodc_read - Read data from the modules IODC.
310 * @actcnt: The actual number of bytes.
311 * @hpa: The HPA of the module for the iodc read.
312 * @index: The iodc entry point.
313 * @iodc_data: A buffer memory for the iodc options.
314 * @iodc_data_size: Size of the memory buffer.
316 * This PDC call reads from the IODC of the module specified by the hpa
319 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
320 void *iodc_data, unsigned int iodc_data_size)
324 spin_lock_irq(&pdc_lock);
325 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
326 index, __pa(pdc_result2), iodc_data_size);
327 convert_to_wide(pdc_result);
328 *actcnt = pdc_result[0];
329 memcpy(iodc_data, pdc_result2, iodc_data_size);
330 spin_unlock_irq(&pdc_lock);
334 EXPORT_SYMBOL(pdc_iodc_read);
337 * pdc_system_map_find_mods - Locate unarchitected modules.
338 * @pdc_mod_info: Return buffer address.
339 * @mod_path: pointer to dev path structure.
340 * @mod_index: fixed address module index.
342 * To locate and identify modules which reside at fixed I/O addresses, which
343 * do not self-identify via architected bus walks.
345 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
346 struct pdc_module_path *mod_path, long mod_index)
350 spin_lock_irq(&pdc_lock);
351 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
352 __pa(pdc_result2), mod_index);
353 convert_to_wide(pdc_result);
354 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
355 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
356 spin_unlock_irq(&pdc_lock);
358 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
363 * pdc_system_map_find_addrs - Retrieve additional address ranges.
364 * @pdc_addr_info: Return buffer address.
365 * @mod_index: Fixed address module index.
366 * @addr_index: Address range index.
368 * Retrieve additional information about subsequent address ranges for modules
369 * with multiple address ranges.
371 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
372 long mod_index, long addr_index)
376 spin_lock_irq(&pdc_lock);
377 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
378 mod_index, addr_index);
379 convert_to_wide(pdc_result);
380 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
381 spin_unlock_irq(&pdc_lock);
383 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
388 * pdc_model_info - Return model information about the processor.
389 * @model: The return buffer.
391 * Returns the version numbers, identifiers, and capabilities from the processor module.
393 int pdc_model_info(struct pdc_model *model)
397 spin_lock_irq(&pdc_lock);
398 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
399 convert_to_wide(pdc_result);
400 memcpy(model, pdc_result, sizeof(*model));
401 spin_unlock_irq(&pdc_lock);
407 * pdc_model_sysmodel - Get the system model name.
408 * @name: A char array of at least 81 characters.
410 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L)
412 int pdc_model_sysmodel(char *name)
416 spin_lock_irq(&pdc_lock);
417 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
418 OS_ID_HPUX, __pa(name));
419 convert_to_wide(pdc_result);
421 if (retval == PDC_OK) {
422 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
426 spin_unlock_irq(&pdc_lock);
432 * pdc_model_versions - Identify the version number of each processor.
433 * @cpu_id: The return buffer.
434 * @id: The id of the processor to check.
436 * Returns the version number for each processor component.
438 * This comment was here before, but I do not know what it means :( -RB
439 * id: 0 = cpu revision, 1 = boot-rom-version
441 int pdc_model_versions(unsigned long *versions, int id)
445 spin_lock_irq(&pdc_lock);
446 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
447 convert_to_wide(pdc_result);
448 *versions = pdc_result[0];
449 spin_unlock_irq(&pdc_lock);
455 * pdc_model_cpuid - Returns the CPU_ID.
456 * @cpu_id: The return buffer.
458 * Returns the CPU_ID value which uniquely identifies the cpu portion of
459 * the processor module.
461 int pdc_model_cpuid(unsigned long *cpu_id)
465 spin_lock_irq(&pdc_lock);
466 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
467 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
468 convert_to_wide(pdc_result);
469 *cpu_id = pdc_result[0];
470 spin_unlock_irq(&pdc_lock);
476 * pdc_model_capabilities - Returns the platform capabilities.
477 * @capabilities: The return buffer.
479 * Returns information about platform support for 32- and/or 64-bit
480 * OSes, IO-PDIR coherency, and virtual aliasing.
482 int pdc_model_capabilities(unsigned long *capabilities)
486 spin_lock_irq(&pdc_lock);
487 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
488 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
489 convert_to_wide(pdc_result);
490 *capabilities = pdc_result[0];
491 spin_unlock_irq(&pdc_lock);
497 * pdc_cache_info - Return cache and TLB information.
498 * @cache_info: The return buffer.
500 * Returns information about the processor's cache and TLB.
502 int pdc_cache_info(struct pdc_cache_info *cache_info)
506 spin_lock_irq(&pdc_lock);
507 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
508 convert_to_wide(pdc_result);
509 memcpy(cache_info, pdc_result, sizeof(*cache_info));
510 spin_unlock_irq(&pdc_lock);
517 * pdc_btlb_info - Return block TLB information.
518 * @btlb: The return buffer.
520 * Returns information about the hardware Block TLB.
522 int pdc_btlb_info(struct pdc_btlb_info *btlb)
526 spin_lock_irq(&pdc_lock);
527 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
528 memcpy(btlb, pdc_result, sizeof(*btlb));
529 spin_unlock_irq(&pdc_lock);
538 * pdc_mem_map_hpa - Find fixed module information.
539 * @address: The return buffer
540 * @mod_path: pointer to dev path structure.
542 * This call was developed for S700 workstations to allow the kernel to find
543 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
544 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
547 * This call is supported by all existing S700 workstations (up to Gecko).
549 int pdc_mem_map_hpa(struct pdc_memory_map *address,
550 struct pdc_module_path *mod_path)
554 spin_lock_irq(&pdc_lock);
555 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
556 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
558 memcpy(address, pdc_result, sizeof(*address));
559 spin_unlock_irq(&pdc_lock);
563 #endif /* !CONFIG_PA20 */
566 * pdc_lan_station_id - Get the LAN address.
567 * @lan_addr: The return buffer.
568 * @hpa: The network device HPA.
570 * Get the LAN station address when it is not directly available from the LAN hardware.
572 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
576 spin_lock_irq(&pdc_lock);
577 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
578 __pa(pdc_result), hpa);
580 /* FIXME: else read MAC from NVRAM */
581 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
583 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
585 spin_unlock_irq(&pdc_lock);
589 EXPORT_SYMBOL(pdc_lan_station_id);
592 * pdc_stable_read - Read data from Stable Storage.
593 * @staddr: Stable Storage address to access.
594 * @memaddr: The memory address where Stable Storage data shall be copied.
595 * @count: number of bytes to transfert. count is multiple of 4.
597 * This PDC call reads from the Stable Storage address supplied in staddr
598 * and copies count bytes to the memory address memaddr.
599 * The call will fail if staddr+count > PDC_STABLE size.
601 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
605 spin_lock_irq(&pdc_lock);
606 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
607 __pa(pdc_result), count);
608 convert_to_wide(pdc_result);
609 memcpy(memaddr, pdc_result, count);
610 spin_unlock_irq(&pdc_lock);
614 EXPORT_SYMBOL(pdc_stable_read);
617 * pdc_stable_write - Write data to Stable Storage.
618 * @staddr: Stable Storage address to access.
619 * @memaddr: The memory address where Stable Storage data shall be read from.
620 * @count: number of bytes to transfert. count is multiple of 4.
622 * This PDC call reads count bytes from the supplied memaddr address,
623 * and copies count bytes to the Stable Storage address staddr.
624 * The call will fail if staddr+count > PDC_STABLE size.
626 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
630 spin_lock_irq(&pdc_lock);
631 memcpy(pdc_result, memaddr, count);
632 convert_to_wide(pdc_result);
633 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
634 __pa(pdc_result), count);
635 spin_unlock_irq(&pdc_lock);
639 EXPORT_SYMBOL(pdc_stable_write);
642 * pdc_stable_get_size - Get Stable Storage size in bytes.
643 * @size: pointer where the size will be stored.
645 * This PDC call returns the number of bytes in the processor's Stable
646 * Storage, which is the number of contiguous bytes implemented in Stable
647 * Storage starting from staddr=0. size in an unsigned 64-bit integer
648 * which is a multiple of four.
650 int pdc_stable_get_size(unsigned long *size)
654 spin_lock_irq(&pdc_lock);
655 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
656 *size = pdc_result[0];
657 spin_unlock_irq(&pdc_lock);
661 EXPORT_SYMBOL(pdc_stable_get_size);
664 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
666 * This PDC call is meant to be used to check the integrity of the current
667 * contents of Stable Storage.
669 int pdc_stable_verify_contents(void)
673 spin_lock_irq(&pdc_lock);
674 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
675 spin_unlock_irq(&pdc_lock);
679 EXPORT_SYMBOL(pdc_stable_verify_contents);
682 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
683 * the validity indicator.
685 * This PDC call will erase all contents of Stable Storage. Use with care!
687 int pdc_stable_initialize(void)
691 spin_lock_irq(&pdc_lock);
692 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
693 spin_unlock_irq(&pdc_lock);
697 EXPORT_SYMBOL(pdc_stable_initialize);
700 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
701 * @hwpath: fully bc.mod style path to the device.
702 * @initiator: the array to return the result into
704 * Get the SCSI operational parameters from PDC.
705 * Needed since HPUX never used BIOS or symbios card NVRAM.
706 * Most ncr/sym cards won't have an entry and just use whatever
707 * capabilities of the card are (eg Ultra, LVD). But there are
708 * several cases where it's useful:
709 * o set SCSI id for Multi-initiator clusters,
710 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
711 * o bus width exported is less than what the interface chip supports.
713 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
717 spin_lock_irq(&pdc_lock);
719 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
720 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
721 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
723 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
724 __pa(pdc_result), __pa(hwpath));
728 if (pdc_result[0] < 16) {
729 initiator->host_id = pdc_result[0];
731 initiator->host_id = -1;
735 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
736 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
738 switch (pdc_result[1]) {
739 case 1: initiator->factor = 50; break;
740 case 2: initiator->factor = 25; break;
741 case 5: initiator->factor = 12; break;
742 case 25: initiator->factor = 10; break;
743 case 20: initiator->factor = 12; break;
744 case 40: initiator->factor = 10; break;
745 default: initiator->factor = -1; break;
748 if (IS_SPROCKETS()) {
749 initiator->width = pdc_result[4];
750 initiator->mode = pdc_result[5];
752 initiator->width = -1;
753 initiator->mode = -1;
757 spin_unlock_irq(&pdc_lock);
758 return (retval >= PDC_OK);
760 EXPORT_SYMBOL(pdc_get_initiator);
764 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
765 * @num_entries: The return value.
766 * @hpa: The HPA for the device.
768 * This PDC function returns the number of entries in the specified cell's
770 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
772 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
776 spin_lock_irq(&pdc_lock);
777 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
778 __pa(pdc_result), hpa);
779 convert_to_wide(pdc_result);
780 *num_entries = pdc_result[0];
781 spin_unlock_irq(&pdc_lock);
787 * pdc_pci_irt - Get the PCI interrupt routing table.
788 * @num_entries: The number of entries in the table.
789 * @hpa: The Hard Physical Address of the device.
792 * Get the PCI interrupt routing table for the device at the given HPA.
793 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
795 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
799 BUG_ON((unsigned long)tbl & 0x7);
801 spin_lock_irq(&pdc_lock);
802 pdc_result[0] = num_entries;
803 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
804 __pa(pdc_result), hpa, __pa(tbl));
805 spin_unlock_irq(&pdc_lock);
811 #if 0 /* UNTEST CODE - left here in case someone needs it */
814 * pdc_pci_config_read - read PCI config space.
815 * @hpa token from PDC to indicate which PCI device
816 * @pci_addr configuration space address to read from
818 * Read PCI Configuration space *before* linux PCI subsystem is running.
820 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
823 spin_lock_irq(&pdc_lock);
826 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
827 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
828 spin_unlock_irq(&pdc_lock);
829 return retval ? ~0 : (unsigned int) pdc_result[0];
834 * pdc_pci_config_write - read PCI config space.
835 * @hpa token from PDC to indicate which PCI device
836 * @pci_addr configuration space address to write
837 * @val value we want in the 32-bit register
839 * Write PCI Configuration space *before* linux PCI subsystem is running.
841 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
844 spin_lock_irq(&pdc_lock);
846 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
847 __pa(pdc_result), hpa,
848 cfg_addr&~3UL, 4UL, (unsigned long) val);
849 spin_unlock_irq(&pdc_lock);
852 #endif /* UNTESTED CODE */
855 * pdc_tod_read - Read the Time-Of-Day clock.
856 * @tod: The return buffer:
858 * Read the Time-Of-Day clock
860 int pdc_tod_read(struct pdc_tod *tod)
864 spin_lock_irq(&pdc_lock);
865 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
866 convert_to_wide(pdc_result);
867 memcpy(tod, pdc_result, sizeof(*tod));
868 spin_unlock_irq(&pdc_lock);
872 EXPORT_SYMBOL(pdc_tod_read);
875 * pdc_tod_set - Set the Time-Of-Day clock.
876 * @sec: The number of seconds since epoch.
877 * @usec: The number of micro seconds.
879 * Set the Time-Of-Day clock.
881 int pdc_tod_set(unsigned long sec, unsigned long usec)
885 spin_lock_irq(&pdc_lock);
886 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
887 spin_unlock_irq(&pdc_lock);
891 EXPORT_SYMBOL(pdc_tod_set);
894 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
895 struct pdc_memory_table *tbl, unsigned long entries)
899 spin_lock_irq(&pdc_lock);
900 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
901 convert_to_wide(pdc_result);
902 memcpy(r_addr, pdc_result, sizeof(*r_addr));
903 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
904 spin_unlock_irq(&pdc_lock);
908 #endif /* __LP64__ */
910 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
911 * so I guessed at unsigned long. Someone who knows what this does, can fix
914 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
918 spin_lock_irq(&pdc_lock);
919 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
920 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
921 spin_unlock_irq(&pdc_lock);
927 * pdc_do_reset - Reset the system.
931 int pdc_do_reset(void)
935 spin_lock_irq(&pdc_lock);
936 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
937 spin_unlock_irq(&pdc_lock);
943 * pdc_soft_power_info - Enable soft power switch.
944 * @power_reg: address of soft power register
946 * Return the absolute address of the soft power switch register
948 int __init pdc_soft_power_info(unsigned long *power_reg)
952 *power_reg = (unsigned long) (-1);
954 spin_lock_irq(&pdc_lock);
955 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
956 if (retval == PDC_OK) {
957 convert_to_wide(pdc_result);
958 *power_reg = f_extend(pdc_result[0]);
960 spin_unlock_irq(&pdc_lock);
966 * pdc_soft_power_button - Control the soft power button behaviour
967 * @sw_control: 0 for hardware control, 1 for software control
970 * This PDC function places the soft power button under software or
972 * Under software control the OS may control to when to allow to shut
973 * down the system. Under hardware control pressing the power button
974 * powers off the system immediately.
976 int pdc_soft_power_button(int sw_control)
979 spin_lock_irq(&pdc_lock);
980 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
981 spin_unlock_irq(&pdc_lock);
986 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
987 * Primarily a problem on T600 (which parisc-linux doesn't support) but
988 * who knows what other platform firmware might do with this OS "hook".
990 void pdc_io_reset(void)
992 spin_lock_irq(&pdc_lock);
993 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
994 spin_unlock_irq(&pdc_lock);
998 * pdc_io_reset_devices - Hack to Stop USB controller
1000 * If PDC used the usb controller, the usb controller
1001 * is still running and will crash the machines during iommu
1002 * setup, because of still running DMA. This PDC call
1003 * stops the USB controller.
1004 * Normally called after calling pdc_io_reset().
1006 void pdc_io_reset_devices(void)
1008 spin_lock_irq(&pdc_lock);
1009 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1010 spin_unlock_irq(&pdc_lock);
1015 * pdc_iodc_putc - Console character print using IODC.
1016 * @c: the character to output.
1018 * Note that only these special chars are architected for console IODC io:
1019 * BEL, BS, CR, and LF. Others are passed through.
1020 * Since the HP console requires CR+LF to perform a 'newline', we translate
1023 void pdc_iodc_putc(unsigned char c)
1025 /* XXX Should we spinlock posx usage */
1026 static int posx; /* for simple TAB-Simulation... */
1027 static int __attribute__((aligned(8))) iodc_retbuf[32];
1028 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1034 iodc_dbuf[0] = '\r';
1035 iodc_dbuf[1] = '\n';
1041 while (posx & 7) /* expand TAB */
1043 return; /* return since IODC can't handle this */
1053 spin_lock_irqsave(&pdc_lock, flags);
1054 real32_call(PAGE0->mem_cons.iodc_io,
1055 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1056 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1057 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0);
1058 spin_unlock_irqrestore(&pdc_lock, flags);
1062 * pdc_iodc_outc - Console character print using IODC (without conversions).
1063 * @c: the character to output.
1065 * Write the character directly to the IODC console.
1067 void pdc_iodc_outc(unsigned char c)
1069 unsigned int n, flags;
1071 /* fill buffer with one caracter and print it */
1072 static int __attribute__((aligned(8))) iodc_retbuf[32];
1073 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1078 spin_lock_irqsave(&pdc_lock, flags);
1079 real32_call(PAGE0->mem_cons.iodc_io,
1080 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1081 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1082 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0);
1083 spin_unlock_irqrestore(&pdc_lock, flags);
1087 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1089 * Read a character (non-blocking) from the PDC console, returns -1 if
1090 * key is not present.
1092 int pdc_iodc_getc(void)
1095 static int __attribute__((aligned(8))) iodc_retbuf[32];
1096 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1100 /* Bail if no console input device. */
1101 if (!PAGE0->mem_kbd.iodc_io)
1104 /* wait for a keyboard (rs232)-input */
1105 spin_lock_irqsave(&pdc_lock, flags);
1106 real32_call(PAGE0->mem_kbd.iodc_io,
1107 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1108 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1109 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1112 status = *iodc_retbuf;
1113 spin_unlock_irqrestore(&pdc_lock, flags);
1121 int pdc_sti_call(unsigned long func, unsigned long flags,
1122 unsigned long inptr, unsigned long outputr,
1123 unsigned long glob_cfg)
1127 spin_lock_irq(&pdc_lock);
1128 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1129 spin_unlock_irq(&pdc_lock);
1133 EXPORT_SYMBOL(pdc_sti_call);
1137 * pdc_pat_cell_get_number - Returns the cell number.
1138 * @cell_info: The return buffer.
1140 * This PDC call returns the cell number of the cell from which the call
1143 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1147 spin_lock_irq(&pdc_lock);
1148 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1149 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1150 spin_unlock_irq(&pdc_lock);
1156 * pdc_pat_cell_module - Retrieve the cell's module information.
1157 * @actcnt: The number of bytes written to mem_addr.
1158 * @ploc: The physical location.
1159 * @mod: The module index.
1160 * @view_type: The view of the address type.
1161 * @mem_addr: The return buffer.
1163 * This PDC call returns information about each module attached to the cell
1164 * at the specified location.
1166 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1167 unsigned long view_type, void *mem_addr)
1170 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1172 spin_lock_irq(&pdc_lock);
1173 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1174 ploc, mod, view_type, __pa(&result));
1176 *actcnt = pdc_result[0];
1177 memcpy(mem_addr, &result, *actcnt);
1179 spin_unlock_irq(&pdc_lock);
1185 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1186 * @cpu_info: The return buffer.
1187 * @hpa: The Hard Physical Address of the CPU.
1189 * Retrieve the cpu number for the cpu at the specified HPA.
1191 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
1195 spin_lock_irq(&pdc_lock);
1196 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1197 __pa(&pdc_result), hpa);
1198 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1199 spin_unlock_irq(&pdc_lock);
1205 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1206 * @num_entries: The return value.
1207 * @cell_num: The target cell.
1209 * This PDC function returns the number of entries in the specified cell's
1212 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1216 spin_lock_irq(&pdc_lock);
1217 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1218 __pa(pdc_result), cell_num);
1219 *num_entries = pdc_result[0];
1220 spin_unlock_irq(&pdc_lock);
1226 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1227 * @r_addr: The return buffer.
1228 * @cell_num: The target cell.
1230 * This PDC function returns the actual interrupt table for the specified cell.
1232 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1236 spin_lock_irq(&pdc_lock);
1237 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1238 __pa(r_addr), cell_num);
1239 spin_unlock_irq(&pdc_lock);
1245 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1246 * @actlen: The return buffer.
1247 * @mem_addr: Pointer to the memory buffer.
1248 * @count: The number of bytes to read from the buffer.
1249 * @offset: The offset with respect to the beginning of the buffer.
1252 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1253 unsigned long count, unsigned long offset)
1257 spin_lock_irq(&pdc_lock);
1258 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1259 __pa(pdc_result2), count, offset);
1260 *actual_len = pdc_result[0];
1261 memcpy(mem_addr, pdc_result2, *actual_len);
1262 spin_unlock_irq(&pdc_lock);
1268 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1269 * @pci_addr: PCI configuration space address for which the read request is being made.
1270 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1271 * @mem_addr: Pointer to return memory buffer.
1274 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1277 spin_lock_irq(&pdc_lock);
1278 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1279 __pa(pdc_result), pci_addr, pci_size);
1281 case 1: *(u8 *) mem_addr = (u8) pdc_result[0];
1282 case 2: *(u16 *)mem_addr = (u16) pdc_result[0];
1283 case 4: *(u32 *)mem_addr = (u32) pdc_result[0];
1285 spin_unlock_irq(&pdc_lock);
1291 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1292 * @pci_addr: PCI configuration space address for which the write request is being made.
1293 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1294 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1295 * written to PCI Config space.
1298 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1302 spin_lock_irq(&pdc_lock);
1303 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1304 pci_addr, pci_size, val);
1305 spin_unlock_irq(&pdc_lock);
1309 #endif /* __LP64__ */
1312 /***************** 32-bit real-mode calls ***********/
1313 /* The struct below is used
1314 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1315 * real32_call_asm() then uses this stack in narrow real mode
1318 struct narrow_stack {
1319 /* use int, not long which is 64 bits */
1334 unsigned int frame_marker[8];
1336 /* in reality, there's nearly 8k of stack after this */
1339 long real32_call(unsigned long fn, ...)
1342 extern struct narrow_stack real_stack;
1343 extern unsigned long real32_call_asm(unsigned int *,
1348 real_stack.arg0 = va_arg(args, unsigned int);
1349 real_stack.arg1 = va_arg(args, unsigned int);
1350 real_stack.arg2 = va_arg(args, unsigned int);
1351 real_stack.arg3 = va_arg(args, unsigned int);
1352 real_stack.arg4 = va_arg(args, unsigned int);
1353 real_stack.arg5 = va_arg(args, unsigned int);
1354 real_stack.arg6 = va_arg(args, unsigned int);
1355 real_stack.arg7 = va_arg(args, unsigned int);
1356 real_stack.arg8 = va_arg(args, unsigned int);
1357 real_stack.arg9 = va_arg(args, unsigned int);
1358 real_stack.arg10 = va_arg(args, unsigned int);
1359 real_stack.arg11 = va_arg(args, unsigned int);
1360 real_stack.arg12 = va_arg(args, unsigned int);
1361 real_stack.arg13 = va_arg(args, unsigned int);
1364 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1368 /***************** 64-bit real-mode calls ***********/
1381 unsigned long arg10;
1382 unsigned long arg11;
1383 unsigned long arg12;
1384 unsigned long arg13;
1385 unsigned long frame_marker[2]; /* rp, previous sp */
1387 /* in reality, there's nearly 8k of stack after this */
1390 long real64_call(unsigned long fn, ...)
1393 extern struct wide_stack real64_stack;
1394 extern unsigned long real64_call_asm(unsigned long *,
1399 real64_stack.arg0 = va_arg(args, unsigned long);
1400 real64_stack.arg1 = va_arg(args, unsigned long);
1401 real64_stack.arg2 = va_arg(args, unsigned long);
1402 real64_stack.arg3 = va_arg(args, unsigned long);
1403 real64_stack.arg4 = va_arg(args, unsigned long);
1404 real64_stack.arg5 = va_arg(args, unsigned long);
1405 real64_stack.arg6 = va_arg(args, unsigned long);
1406 real64_stack.arg7 = va_arg(args, unsigned long);
1407 real64_stack.arg8 = va_arg(args, unsigned long);
1408 real64_stack.arg9 = va_arg(args, unsigned long);
1409 real64_stack.arg10 = va_arg(args, unsigned long);
1410 real64_stack.arg11 = va_arg(args, unsigned long);
1411 real64_stack.arg12 = va_arg(args, unsigned long);
1412 real64_stack.arg13 = va_arg(args, unsigned long);
1415 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1418 #endif /* __LP64__ */