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 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 = 1;
86 /* on all currently-supported platforms, IODC I/O calls are always
87 * 32-bit calls, and MEM_PDC calls are always the same width as the OS.
88 * This means Cxxx boxes can't run wide kernels right now. -PB
90 * CONFIG_PDC_NARROW has been added to allow 64-bit kernels to run on
91 * systems with 32-bit MEM_PDC calls. This will allow wide kernels to
92 * run on Cxxx boxes now. -RB
94 * Note that some PAT boxes may have 64-bit IODC I/O...
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 0xf0f0f0f000000000 | (u32)address;
125 if((address & 0xf0000000) == 0xf0000000)
126 return 0xffffffff00000000 | (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 display
256 * @retval: -1 on error, 0 on success
258 * Works on old PDC only (E class, others?)
260 int pdc_chassis_disp(unsigned long disp)
264 spin_lock_irq(&pdc_lock);
265 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
266 spin_unlock_irq(&pdc_lock);
272 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
273 * @pdc_coproc_info: Return buffer address.
275 * This PDC call returns the presence and status of all the coprocessors
276 * attached to the processor.
278 int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
282 spin_lock_irq(&pdc_lock);
283 retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
284 convert_to_wide(pdc_result);
285 pdc_coproc_info->ccr_functional = pdc_result[0];
286 pdc_coproc_info->ccr_present = pdc_result[1];
287 pdc_coproc_info->revision = pdc_result[17];
288 pdc_coproc_info->model = pdc_result[18];
289 spin_unlock_irq(&pdc_lock);
295 * pdc_iodc_read - Read data from the modules IODC.
296 * @actcnt: The actual number of bytes.
297 * @hpa: The HPA of the module for the iodc read.
298 * @index: The iodc entry point.
299 * @iodc_data: A buffer memory for the iodc options.
300 * @iodc_data_size: Size of the memory buffer.
302 * This PDC call reads from the IODC of the module specified by the hpa
305 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
306 void *iodc_data, unsigned int iodc_data_size)
310 spin_lock_irq(&pdc_lock);
311 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
312 index, __pa(pdc_result2), iodc_data_size);
313 convert_to_wide(pdc_result);
314 *actcnt = pdc_result[0];
315 memcpy(iodc_data, pdc_result2, iodc_data_size);
316 spin_unlock_irq(&pdc_lock);
320 EXPORT_SYMBOL(pdc_iodc_read);
323 * pdc_system_map_find_mods - Locate unarchitected modules.
324 * @pdc_mod_info: Return buffer address.
325 * @mod_path: pointer to dev path structure.
326 * @mod_index: fixed address module index.
328 * To locate and identify modules which reside at fixed I/O addresses, which
329 * do not self-identify via architected bus walks.
331 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
332 struct pdc_module_path *mod_path, long mod_index)
336 spin_lock_irq(&pdc_lock);
337 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
338 __pa(pdc_result2), mod_index);
339 convert_to_wide(pdc_result);
340 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
341 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
342 spin_unlock_irq(&pdc_lock);
344 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
349 * pdc_system_map_find_addrs - Retrieve additional address ranges.
350 * @pdc_addr_info: Return buffer address.
351 * @mod_index: Fixed address module index.
352 * @addr_index: Address range index.
354 * Retrieve additional information about subsequent address ranges for modules
355 * with multiple address ranges.
357 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
358 long mod_index, long addr_index)
362 spin_lock_irq(&pdc_lock);
363 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
364 mod_index, addr_index);
365 convert_to_wide(pdc_result);
366 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
367 spin_unlock_irq(&pdc_lock);
369 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
374 * pdc_model_info - Return model information about the processor.
375 * @model: The return buffer.
377 * Returns the version numbers, identifiers, and capabilities from the processor module.
379 int pdc_model_info(struct pdc_model *model)
383 spin_lock_irq(&pdc_lock);
384 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
385 convert_to_wide(pdc_result);
386 memcpy(model, pdc_result, sizeof(*model));
387 spin_unlock_irq(&pdc_lock);
393 * pdc_model_sysmodel - Get the system model name.
394 * @name: A char array of at least 81 characters.
396 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L)
398 int pdc_model_sysmodel(char *name)
402 spin_lock_irq(&pdc_lock);
403 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
404 OS_ID_HPUX, __pa(name));
405 convert_to_wide(pdc_result);
407 if (retval == PDC_OK) {
408 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
412 spin_unlock_irq(&pdc_lock);
418 * pdc_model_versions - Identify the version number of each processor.
419 * @cpu_id: The return buffer.
420 * @id: The id of the processor to check.
422 * Returns the version number for each processor component.
424 * This comment was here before, but I do not know what it means :( -RB
425 * id: 0 = cpu revision, 1 = boot-rom-version
427 int pdc_model_versions(unsigned long *versions, int id)
431 spin_lock_irq(&pdc_lock);
432 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
433 convert_to_wide(pdc_result);
434 *versions = pdc_result[0];
435 spin_unlock_irq(&pdc_lock);
441 * pdc_model_cpuid - Returns the CPU_ID.
442 * @cpu_id: The return buffer.
444 * Returns the CPU_ID value which uniquely identifies the cpu portion of
445 * the processor module.
447 int pdc_model_cpuid(unsigned long *cpu_id)
451 spin_lock_irq(&pdc_lock);
452 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
453 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
454 convert_to_wide(pdc_result);
455 *cpu_id = pdc_result[0];
456 spin_unlock_irq(&pdc_lock);
462 * pdc_model_capabilities - Returns the platform capabilities.
463 * @capabilities: The return buffer.
465 * Returns information about platform support for 32- and/or 64-bit
466 * OSes, IO-PDIR coherency, and virtual aliasing.
468 int pdc_model_capabilities(unsigned long *capabilities)
472 spin_lock_irq(&pdc_lock);
473 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
474 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
475 convert_to_wide(pdc_result);
476 *capabilities = pdc_result[0];
477 spin_unlock_irq(&pdc_lock);
483 * pdc_cache_info - Return cache and TLB information.
484 * @cache_info: The return buffer.
486 * Returns information about the processor's cache and TLB.
488 int pdc_cache_info(struct pdc_cache_info *cache_info)
492 spin_lock_irq(&pdc_lock);
493 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
494 convert_to_wide(pdc_result);
495 memcpy(cache_info, pdc_result, sizeof(*cache_info));
496 spin_unlock_irq(&pdc_lock);
503 * pdc_btlb_info - Return block TLB information.
504 * @btlb: The return buffer.
506 * Returns information about the hardware Block TLB.
508 int pdc_btlb_info(struct pdc_btlb_info *btlb)
512 spin_lock_irq(&pdc_lock);
513 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
514 memcpy(btlb, pdc_result, sizeof(*btlb));
515 spin_unlock_irq(&pdc_lock);
524 * pdc_mem_map_hpa - Find fixed module information.
525 * @address: The return buffer
526 * @mod_path: pointer to dev path structure.
528 * This call was developed for S700 workstations to allow the kernel to find
529 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
530 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
533 * This call is supported by all existing S700 workstations (up to Gecko).
535 int pdc_mem_map_hpa(struct pdc_memory_map *address,
536 struct pdc_module_path *mod_path)
540 spin_lock_irq(&pdc_lock);
541 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
542 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
544 memcpy(address, pdc_result, sizeof(*address));
545 spin_unlock_irq(&pdc_lock);
549 #endif /* !CONFIG_PA20 */
552 * pdc_lan_station_id - Get the LAN address.
553 * @lan_addr: The return buffer.
554 * @hpa: The network device HPA.
556 * Get the LAN station address when it is not directly available from the LAN hardware.
558 int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
562 spin_lock_irq(&pdc_lock);
563 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
564 __pa(pdc_result), hpa);
566 /* FIXME: else read MAC from NVRAM */
567 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
569 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
571 spin_unlock_irq(&pdc_lock);
575 EXPORT_SYMBOL(pdc_lan_station_id);
578 * pdc_stable_read - Read data from Stable Storage.
579 * @staddr: Stable Storage address to access.
580 * @memaddr: The memory address where Stable Storage data shall be copied.
581 * @count: number of bytes to transfert. count is multiple of 4.
583 * This PDC call reads from the Stable Storage address supplied in staddr
584 * and copies count bytes to the memory address memaddr.
585 * The call will fail if staddr+count > PDC_STABLE size.
587 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
591 spin_lock_irq(&pdc_lock);
592 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
593 __pa(pdc_result), count);
594 convert_to_wide(pdc_result);
595 memcpy(memaddr, pdc_result, count);
596 spin_unlock_irq(&pdc_lock);
600 EXPORT_SYMBOL(pdc_stable_read);
603 * pdc_stable_write - Write data to Stable Storage.
604 * @staddr: Stable Storage address to access.
605 * @memaddr: The memory address where Stable Storage data shall be read from.
606 * @count: number of bytes to transfert. count is multiple of 4.
608 * This PDC call reads count bytes from the supplied memaddr address,
609 * and copies count bytes to the Stable Storage address staddr.
610 * The call will fail if staddr+count > PDC_STABLE size.
612 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
616 spin_lock_irq(&pdc_lock);
617 memcpy(pdc_result, memaddr, count);
618 convert_to_wide(pdc_result);
619 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
620 __pa(pdc_result), count);
621 spin_unlock_irq(&pdc_lock);
625 EXPORT_SYMBOL(pdc_stable_write);
628 * pdc_stable_get_size - Get Stable Storage size in bytes.
629 * @size: pointer where the size will be stored.
631 * This PDC call returns the number of bytes in the processor's Stable
632 * Storage, which is the number of contiguous bytes implemented in Stable
633 * Storage starting from staddr=0. size in an unsigned 64-bit integer
634 * which is a multiple of four.
636 int pdc_stable_get_size(unsigned long *size)
640 spin_lock_irq(&pdc_lock);
641 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
642 *size = pdc_result[0];
643 spin_unlock_irq(&pdc_lock);
647 EXPORT_SYMBOL(pdc_stable_get_size);
650 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
652 * This PDC call is meant to be used to check the integrity of the current
653 * contents of Stable Storage.
655 int pdc_stable_verify_contents(void)
659 spin_lock_irq(&pdc_lock);
660 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
661 spin_unlock_irq(&pdc_lock);
665 EXPORT_SYMBOL(pdc_stable_verify_contents);
668 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
669 * the validity indicator.
671 * This PDC call will erase all contents of Stable Storage. Use with care!
673 int pdc_stable_initialize(void)
677 spin_lock_irq(&pdc_lock);
678 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
679 spin_unlock_irq(&pdc_lock);
683 EXPORT_SYMBOL(pdc_stable_initialize);
686 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
687 * @hwpath: fully bc.mod style path to the device.
688 * @initiator: the array to return the result into
690 * Get the SCSI operational parameters from PDC.
691 * Needed since HPUX never used BIOS or symbios card NVRAM.
692 * Most ncr/sym cards won't have an entry and just use whatever
693 * capabilities of the card are (eg Ultra, LVD). But there are
694 * several cases where it's useful:
695 * o set SCSI id for Multi-initiator clusters,
696 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
697 * o bus width exported is less than what the interface chip supports.
699 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
703 spin_lock_irq(&pdc_lock);
705 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
706 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
707 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
709 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
710 __pa(pdc_result), __pa(hwpath));
714 if (pdc_result[0] < 16) {
715 initiator->host_id = pdc_result[0];
717 initiator->host_id = -1;
721 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
722 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
724 switch (pdc_result[1]) {
725 case 1: initiator->factor = 50; break;
726 case 2: initiator->factor = 25; break;
727 case 5: initiator->factor = 12; break;
728 case 25: initiator->factor = 10; break;
729 case 20: initiator->factor = 12; break;
730 case 40: initiator->factor = 10; break;
731 default: initiator->factor = -1; break;
734 if (IS_SPROCKETS()) {
735 initiator->width = pdc_result[4];
736 initiator->mode = pdc_result[5];
738 initiator->width = -1;
739 initiator->mode = -1;
743 spin_unlock_irq(&pdc_lock);
744 return (retval >= PDC_OK);
746 EXPORT_SYMBOL(pdc_get_initiator);
750 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
751 * @num_entries: The return value.
752 * @hpa: The HPA for the device.
754 * This PDC function returns the number of entries in the specified cell's
756 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
758 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
762 spin_lock_irq(&pdc_lock);
763 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
764 __pa(pdc_result), hpa);
765 convert_to_wide(pdc_result);
766 *num_entries = pdc_result[0];
767 spin_unlock_irq(&pdc_lock);
773 * pdc_pci_irt - Get the PCI interrupt routing table.
774 * @num_entries: The number of entries in the table.
775 * @hpa: The Hard Physical Address of the device.
778 * Get the PCI interrupt routing table for the device at the given HPA.
779 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
781 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
785 spin_lock_irq(&pdc_lock);
786 pdc_result[0] = num_entries;
787 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
788 __pa(pdc_result), hpa, __pa(tbl));
789 spin_unlock_irq(&pdc_lock);
795 #if 0 /* UNTEST CODE - left here in case someone needs it */
798 * pdc_pci_config_read - read PCI config space.
799 * @hpa token from PDC to indicate which PCI device
800 * @pci_addr configuration space address to read from
802 * Read PCI Configuration space *before* linux PCI subsystem is running.
804 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
807 spin_lock_irq(&pdc_lock);
810 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
811 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
812 spin_unlock_irq(&pdc_lock);
813 return retval ? ~0 : (unsigned int) pdc_result[0];
818 * pdc_pci_config_write - read PCI config space.
819 * @hpa token from PDC to indicate which PCI device
820 * @pci_addr configuration space address to write
821 * @val value we want in the 32-bit register
823 * Write PCI Configuration space *before* linux PCI subsystem is running.
825 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
828 spin_lock_irq(&pdc_lock);
830 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
831 __pa(pdc_result), hpa,
832 cfg_addr&~3UL, 4UL, (unsigned long) val);
833 spin_unlock_irq(&pdc_lock);
836 #endif /* UNTESTED CODE */
839 * pdc_tod_read - Read the Time-Of-Day clock.
840 * @tod: The return buffer:
842 * Read the Time-Of-Day clock
844 int pdc_tod_read(struct pdc_tod *tod)
848 spin_lock_irq(&pdc_lock);
849 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
850 convert_to_wide(pdc_result);
851 memcpy(tod, pdc_result, sizeof(*tod));
852 spin_unlock_irq(&pdc_lock);
856 EXPORT_SYMBOL(pdc_tod_read);
859 * pdc_tod_set - Set the Time-Of-Day clock.
860 * @sec: The number of seconds since epoch.
861 * @usec: The number of micro seconds.
863 * Set the Time-Of-Day clock.
865 int pdc_tod_set(unsigned long sec, unsigned long usec)
869 spin_lock_irq(&pdc_lock);
870 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
871 spin_unlock_irq(&pdc_lock);
875 EXPORT_SYMBOL(pdc_tod_set);
878 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
879 struct pdc_memory_table *tbl, unsigned long entries)
883 spin_lock_irq(&pdc_lock);
884 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
885 convert_to_wide(pdc_result);
886 memcpy(r_addr, pdc_result, sizeof(*r_addr));
887 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
888 spin_unlock_irq(&pdc_lock);
892 #endif /* __LP64__ */
894 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
895 * so I guessed at unsigned long. Someone who knows what this does, can fix
898 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
902 spin_lock_irq(&pdc_lock);
903 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
904 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
905 spin_unlock_irq(&pdc_lock);
911 * pdc_do_reset - Reset the system.
919 spin_lock_irq(&pdc_lock);
920 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
921 spin_unlock_irq(&pdc_lock);
927 * pdc_soft_power_info - Enable soft power switch.
928 * @power_reg: address of soft power register
930 * Return the absolute address of the soft power switch register
932 int __init pdc_soft_power_info(unsigned long *power_reg)
936 *power_reg = (unsigned long) (-1);
938 spin_lock_irq(&pdc_lock);
939 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
940 if (retval == PDC_OK) {
941 convert_to_wide(pdc_result);
942 *power_reg = f_extend(pdc_result[0]);
944 spin_unlock_irq(&pdc_lock);
950 * pdc_soft_power_button - Control the soft power button behaviour
951 * @sw_control: 0 for hardware control, 1 for software control
954 * This PDC function places the soft power button under software or
956 * Under software control the OS may control to when to allow to shut
957 * down the system. Under hardware control pressing the power button
958 * powers off the system immediately.
960 int pdc_soft_power_button(int sw_control)
963 spin_lock_irq(&pdc_lock);
964 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
965 spin_unlock_irq(&pdc_lock);
970 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
971 * Primarily a problem on T600 (which parisc-linux doesn't support) but
972 * who knows what other platform firmware might do with this OS "hook".
974 void pdc_io_reset(void)
976 spin_lock_irq(&pdc_lock);
977 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
978 spin_unlock_irq(&pdc_lock);
982 * pdc_io_reset_devices - Hack to Stop USB controller
984 * If PDC used the usb controller, the usb controller
985 * is still running and will crash the machines during iommu
986 * setup, because of still running DMA. This PDC call
987 * stops the USB controller.
988 * Normally called after calling pdc_io_reset().
990 void pdc_io_reset_devices(void)
992 spin_lock_irq(&pdc_lock);
993 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
994 spin_unlock_irq(&pdc_lock);
999 * pdc_iodc_putc - Console character print using IODC.
1000 * @c: the character to output.
1002 * Note that only these special chars are architected for console IODC io:
1003 * BEL, BS, CR, and LF. Others are passed through.
1004 * Since the HP console requires CR+LF to perform a 'newline', we translate
1007 void pdc_iodc_putc(unsigned char c)
1009 /* XXX Should we spinlock posx usage */
1010 static int posx; /* for simple TAB-Simulation... */
1011 static int __attribute__((aligned(8))) iodc_retbuf[32];
1012 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1018 iodc_dbuf[0] = '\r';
1019 iodc_dbuf[1] = '\n';
1025 while (posx & 7) /* expand TAB */
1027 return; /* return since IODC can't handle this */
1037 spin_lock_irqsave(&pdc_lock, flags);
1038 real32_call(PAGE0->mem_cons.iodc_io,
1039 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1040 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1041 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0);
1042 spin_unlock_irqrestore(&pdc_lock, flags);
1046 * pdc_iodc_outc - Console character print using IODC (without conversions).
1047 * @c: the character to output.
1049 * Write the character directly to the IODC console.
1051 void pdc_iodc_outc(unsigned char c)
1053 unsigned int n, flags;
1055 /* fill buffer with one caracter and print it */
1056 static int __attribute__((aligned(8))) iodc_retbuf[32];
1057 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1062 spin_lock_irqsave(&pdc_lock, flags);
1063 real32_call(PAGE0->mem_cons.iodc_io,
1064 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1065 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1066 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0);
1067 spin_unlock_irqrestore(&pdc_lock, flags);
1071 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1073 * Read a character (non-blocking) from the PDC console, returns -1 if
1074 * key is not present.
1076 int pdc_iodc_getc(void)
1079 static int __attribute__((aligned(8))) iodc_retbuf[32];
1080 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1084 /* Bail if no console input device. */
1085 if (!PAGE0->mem_kbd.iodc_io)
1088 /* wait for a keyboard (rs232)-input */
1089 spin_lock_irqsave(&pdc_lock, flags);
1090 real32_call(PAGE0->mem_kbd.iodc_io,
1091 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1092 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1093 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1096 status = *iodc_retbuf;
1097 spin_unlock_irqrestore(&pdc_lock, flags);
1105 int pdc_sti_call(unsigned long func, unsigned long flags,
1106 unsigned long inptr, unsigned long outputr,
1107 unsigned long glob_cfg)
1111 spin_lock_irq(&pdc_lock);
1112 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1113 spin_unlock_irq(&pdc_lock);
1117 EXPORT_SYMBOL(pdc_sti_call);
1121 * pdc_pat_cell_get_number - Returns the cell number.
1122 * @cell_info: The return buffer.
1124 * This PDC call returns the cell number of the cell from which the call
1127 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1131 spin_lock_irq(&pdc_lock);
1132 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1133 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1134 spin_unlock_irq(&pdc_lock);
1140 * pdc_pat_cell_module - Retrieve the cell's module information.
1141 * @actcnt: The number of bytes written to mem_addr.
1142 * @ploc: The physical location.
1143 * @mod: The module index.
1144 * @view_type: The view of the address type.
1145 * @mem_addr: The return buffer.
1147 * This PDC call returns information about each module attached to the cell
1148 * at the specified location.
1150 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1151 unsigned long view_type, void *mem_addr)
1154 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1156 spin_lock_irq(&pdc_lock);
1157 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1158 ploc, mod, view_type, __pa(&result));
1160 *actcnt = pdc_result[0];
1161 memcpy(mem_addr, &result, *actcnt);
1163 spin_unlock_irq(&pdc_lock);
1169 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1170 * @cpu_info: The return buffer.
1171 * @hpa: The Hard Physical Address of the CPU.
1173 * Retrieve the cpu number for the cpu at the specified HPA.
1175 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
1179 spin_lock_irq(&pdc_lock);
1180 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1181 __pa(&pdc_result), hpa);
1182 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1183 spin_unlock_irq(&pdc_lock);
1189 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1190 * @num_entries: The return value.
1191 * @cell_num: The target cell.
1193 * This PDC function returns the number of entries in the specified cell's
1196 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1200 spin_lock_irq(&pdc_lock);
1201 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1202 __pa(pdc_result), cell_num);
1203 *num_entries = pdc_result[0];
1204 spin_unlock_irq(&pdc_lock);
1210 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1211 * @r_addr: The return buffer.
1212 * @cell_num: The target cell.
1214 * This PDC function returns the actual interrupt table for the specified cell.
1216 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1220 spin_lock_irq(&pdc_lock);
1221 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1222 __pa(r_addr), cell_num);
1223 spin_unlock_irq(&pdc_lock);
1229 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1230 * @actlen: The return buffer.
1231 * @mem_addr: Pointer to the memory buffer.
1232 * @count: The number of bytes to read from the buffer.
1233 * @offset: The offset with respect to the beginning of the buffer.
1236 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1237 unsigned long count, unsigned long offset)
1241 spin_lock_irq(&pdc_lock);
1242 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1243 __pa(pdc_result2), count, offset);
1244 *actual_len = pdc_result[0];
1245 memcpy(mem_addr, pdc_result2, *actual_len);
1246 spin_unlock_irq(&pdc_lock);
1252 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1253 * @pci_addr: PCI configuration space address for which the read request is being made.
1254 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1255 * @mem_addr: Pointer to return memory buffer.
1258 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1261 spin_lock_irq(&pdc_lock);
1262 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1263 __pa(pdc_result), pci_addr, pci_size);
1265 case 1: *(u8 *) mem_addr = (u8) pdc_result[0];
1266 case 2: *(u16 *)mem_addr = (u16) pdc_result[0];
1267 case 4: *(u32 *)mem_addr = (u32) pdc_result[0];
1269 spin_unlock_irq(&pdc_lock);
1275 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1276 * @pci_addr: PCI configuration space address for which the write request is being made.
1277 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1278 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1279 * written to PCI Config space.
1282 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1286 spin_lock_irq(&pdc_lock);
1287 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1288 pci_addr, pci_size, val);
1289 spin_unlock_irq(&pdc_lock);
1293 #endif /* __LP64__ */
1296 /***************** 32-bit real-mode calls ***********/
1297 /* The struct below is used
1298 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1299 * real32_call_asm() then uses this stack in narrow real mode
1302 struct narrow_stack {
1303 /* use int, not long which is 64 bits */
1318 unsigned int frame_marker[8];
1320 /* in reality, there's nearly 8k of stack after this */
1323 long real32_call(unsigned long fn, ...)
1326 extern struct narrow_stack real_stack;
1327 extern unsigned long real32_call_asm(unsigned int *,
1332 real_stack.arg0 = va_arg(args, unsigned int);
1333 real_stack.arg1 = va_arg(args, unsigned int);
1334 real_stack.arg2 = va_arg(args, unsigned int);
1335 real_stack.arg3 = va_arg(args, unsigned int);
1336 real_stack.arg4 = va_arg(args, unsigned int);
1337 real_stack.arg5 = va_arg(args, unsigned int);
1338 real_stack.arg6 = va_arg(args, unsigned int);
1339 real_stack.arg7 = va_arg(args, unsigned int);
1340 real_stack.arg8 = va_arg(args, unsigned int);
1341 real_stack.arg9 = va_arg(args, unsigned int);
1342 real_stack.arg10 = va_arg(args, unsigned int);
1343 real_stack.arg11 = va_arg(args, unsigned int);
1344 real_stack.arg12 = va_arg(args, unsigned int);
1345 real_stack.arg13 = va_arg(args, unsigned int);
1348 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1352 /***************** 64-bit real-mode calls ***********/
1365 unsigned long arg10;
1366 unsigned long arg11;
1367 unsigned long arg12;
1368 unsigned long arg13;
1369 unsigned long frame_marker[2]; /* rp, previous sp */
1371 /* in reality, there's nearly 8k of stack after this */
1374 long real64_call(unsigned long fn, ...)
1377 extern struct wide_stack real64_stack;
1378 extern unsigned long real64_call_asm(unsigned long *,
1383 real64_stack.arg0 = va_arg(args, unsigned long);
1384 real64_stack.arg1 = va_arg(args, unsigned long);
1385 real64_stack.arg2 = va_arg(args, unsigned long);
1386 real64_stack.arg3 = va_arg(args, unsigned long);
1387 real64_stack.arg4 = va_arg(args, unsigned long);
1388 real64_stack.arg5 = va_arg(args, unsigned long);
1389 real64_stack.arg6 = va_arg(args, unsigned long);
1390 real64_stack.arg7 = va_arg(args, unsigned long);
1391 real64_stack.arg8 = va_arg(args, unsigned long);
1392 real64_stack.arg9 = va_arg(args, unsigned long);
1393 real64_stack.arg10 = va_arg(args, unsigned long);
1394 real64_stack.arg11 = va_arg(args, unsigned long);
1395 real64_stack.arg12 = va_arg(args, unsigned long);
1396 real64_stack.arg13 = va_arg(args, unsigned long);
1399 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1402 #endif /* __LP64__ */