2 * arch/parisc/kernel/firmware.c - safe PDC access routines
4 * PDC == Processor Dependent Code
6 * See http://www.parisc-linux.org/documentation/index.html
7 * for documentation describing the entry points and calling
8 * conventions defined below.
10 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
11 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
12 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
13 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
14 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
23 /* I think it would be in everyone's best interest to follow this
24 * guidelines when writing PDC wrappers:
26 * - the name of the pdc wrapper should match one of the macros
27 * used for the first two arguments
28 * - don't use caps for random parts of the name
29 * - use the static PDC result buffers and "copyout" to structs
30 * supplied by the caller to encapsulate alignment restrictions
31 * - hold pdc_lock while in PDC or using static result buffers
32 * - use __pa() to convert virtual (kernel) pointers to physical
34 * - the name of the struct used for pdc return values should equal
35 * one of the macros used for the first two arguments to the
36 * corresponding PDC call
37 * - keep the order of arguments
38 * - don't be smart (setting trailing NUL bytes for strings, return
39 * something useful even if the call failed) unless you are sure
40 * it's not going to affect functionality or performance
43 * int pdc_cache_info(struct pdc_cache_info *cache_info )
47 * spin_lock_irq(&pdc_lock);
48 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
49 * convert_to_wide(pdc_result);
50 * memcpy(cache_info, pdc_result, sizeof(*cache_info));
51 * spin_unlock_irq(&pdc_lock);
60 #include <linux/delay.h>
61 #include <linux/init.h>
62 #include <linux/kernel.h>
63 #include <linux/module.h>
64 #include <linux/string.h>
65 #include <linux/spinlock.h>
69 #include <asm/pdcpat.h>
70 #include <asm/processor.h> /* for boot_cpu_data */
72 static DEFINE_SPINLOCK(pdc_lock
);
73 extern unsigned long pdc_result
[NUM_PDC_RESULT
];
74 extern unsigned long pdc_result2
[NUM_PDC_RESULT
];
77 #define WIDE_FIRMWARE 0x1
78 #define NARROW_FIRMWARE 0x2
80 /* Firmware needs to be initially set to narrow to determine the
81 * actual firmware width. */
82 int parisc_narrow_firmware __read_mostly
= 1;
85 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls
86 * and MEM_PDC calls are always the same width as the OS.
87 * Some PAT boxes may have 64-bit IODC I/O.
89 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
90 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
91 * This allowed wide kernels to run on Cxxx boxes.
92 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
93 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
97 long real64_call(unsigned long function
, ...);
99 long real32_call(unsigned long function
, ...);
102 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
103 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
105 # define MEM_PDC (unsigned long)PAGE0->mem_pdc
106 # define mem_pdc_call(args...) real32_call(MEM_PDC, args)
111 * f_extend - Convert PDC addresses to kernel addresses.
112 * @address: Address returned from PDC.
114 * This function is used to convert PDC addresses into kernel addresses
115 * when the PDC address size and kernel address size are different.
117 static unsigned long f_extend(unsigned long address
)
120 if(unlikely(parisc_narrow_firmware
)) {
121 if((address
& 0xff000000) == 0xf0000000)
122 return 0xf0f0f0f000000000UL
| (u32
)address
;
124 if((address
& 0xf0000000) == 0xf0000000)
125 return 0xffffffff00000000UL
| (u32
)address
;
132 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
133 * @address: The return buffer from PDC.
135 * This function is used to convert the return buffer addresses retrieved from PDC
136 * into kernel addresses when the PDC address size and kernel address size are
139 static void convert_to_wide(unsigned long *addr
)
143 unsigned int *p
= (unsigned int *)addr
;
145 if(unlikely(parisc_narrow_firmware
)) {
146 for(i
= 31; i
>= 0; --i
)
153 void set_firmware_width_unlocked(void)
157 ret
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_CAPABILITIES
,
158 __pa(pdc_result
), 0);
159 convert_to_wide(pdc_result
);
160 if (pdc_result
[0] != NARROW_FIRMWARE
)
161 parisc_narrow_firmware
= 0;
165 * set_firmware_width - Determine if the firmware is wide or narrow.
167 * This function must be called before any pdc_* function that uses the
168 * convert_to_wide function.
170 void set_firmware_width(void)
173 spin_lock_irqsave(&pdc_lock
, flags
);
174 set_firmware_width_unlocked();
175 spin_unlock_irqrestore(&pdc_lock
, flags
);
178 void set_firmware_width_unlocked(void)
183 void set_firmware_width(void)
187 #endif /*CONFIG_64BIT*/
190 * pdc_emergency_unlock - Unlock the linux pdc lock
192 * This call unlocks the linux pdc lock in case we need some PDC functions
193 * (like pdc_add_valid) during kernel stack dump.
195 void pdc_emergency_unlock(void)
197 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
198 if (spin_is_locked(&pdc_lock
))
199 spin_unlock(&pdc_lock
);
204 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
205 * @address: Address to be verified.
207 * This PDC call attempts to read from the specified address and verifies
208 * if the address is valid.
210 * The return value is PDC_OK (0) in case accessing this address is valid.
212 int pdc_add_valid(unsigned long address
)
217 spin_lock_irqsave(&pdc_lock
, flags
);
218 retval
= mem_pdc_call(PDC_ADD_VALID
, PDC_ADD_VALID_VERIFY
, address
);
219 spin_unlock_irqrestore(&pdc_lock
, flags
);
223 EXPORT_SYMBOL(pdc_add_valid
);
226 * pdc_chassis_info - Return chassis information.
227 * @result: The return buffer.
228 * @chassis_info: The memory buffer address.
229 * @len: The size of the memory buffer address.
231 * An HVERSION dependent call for returning the chassis information.
233 int __init
pdc_chassis_info(struct pdc_chassis_info
*chassis_info
, void *led_info
, unsigned long len
)
238 spin_lock_irqsave(&pdc_lock
, flags
);
239 memcpy(&pdc_result
, chassis_info
, sizeof(*chassis_info
));
240 memcpy(&pdc_result2
, led_info
, len
);
241 retval
= mem_pdc_call(PDC_CHASSIS
, PDC_RETURN_CHASSIS_INFO
,
242 __pa(pdc_result
), __pa(pdc_result2
), len
);
243 memcpy(chassis_info
, pdc_result
, sizeof(*chassis_info
));
244 memcpy(led_info
, pdc_result2
, len
);
245 spin_unlock_irqrestore(&pdc_lock
, flags
);
251 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
252 * @retval: -1 on error, 0 on success. Other value are PDC errors
254 * Must be correctly formatted or expect system crash
257 int pdc_pat_chassis_send_log(unsigned long state
, unsigned long data
)
265 spin_lock_irqsave(&pdc_lock
, flags
);
266 retval
= mem_pdc_call(PDC_PAT_CHASSIS_LOG
, PDC_PAT_CHASSIS_WRITE_LOG
, __pa(&state
), __pa(&data
));
267 spin_unlock_irqrestore(&pdc_lock
, flags
);
274 * pdc_chassis_disp - Updates chassis code
275 * @retval: -1 on error, 0 on success
277 int pdc_chassis_disp(unsigned long disp
)
282 spin_lock_irqsave(&pdc_lock
, flags
);
283 retval
= mem_pdc_call(PDC_CHASSIS
, PDC_CHASSIS_DISP
, disp
);
284 spin_unlock_irqrestore(&pdc_lock
, flags
);
290 * pdc_chassis_warn - Fetches chassis warnings
291 * @retval: -1 on error, 0 on success
293 int pdc_chassis_warn(unsigned long *warn
)
298 spin_lock_irqsave(&pdc_lock
, flags
);
299 retval
= mem_pdc_call(PDC_CHASSIS
, PDC_CHASSIS_WARN
, __pa(pdc_result
));
300 *warn
= pdc_result
[0];
301 spin_unlock_irqrestore(&pdc_lock
, flags
);
306 int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg
*pdc_coproc_info
)
310 ret
= mem_pdc_call(PDC_COPROC
, PDC_COPROC_CFG
, __pa(pdc_result
));
311 convert_to_wide(pdc_result
);
312 pdc_coproc_info
->ccr_functional
= pdc_result
[0];
313 pdc_coproc_info
->ccr_present
= pdc_result
[1];
314 pdc_coproc_info
->revision
= pdc_result
[17];
315 pdc_coproc_info
->model
= pdc_result
[18];
321 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
322 * @pdc_coproc_info: Return buffer address.
324 * This PDC call returns the presence and status of all the coprocessors
325 * attached to the processor.
327 int pdc_coproc_cfg(struct pdc_coproc_cfg
*pdc_coproc_info
)
332 spin_lock_irqsave(&pdc_lock
, flags
);
333 ret
= pdc_coproc_cfg_unlocked(pdc_coproc_info
);
334 spin_unlock_irqrestore(&pdc_lock
, flags
);
340 * pdc_iodc_read - Read data from the modules IODC.
341 * @actcnt: The actual number of bytes.
342 * @hpa: The HPA of the module for the iodc read.
343 * @index: The iodc entry point.
344 * @iodc_data: A buffer memory for the iodc options.
345 * @iodc_data_size: Size of the memory buffer.
347 * This PDC call reads from the IODC of the module specified by the hpa
350 int pdc_iodc_read(unsigned long *actcnt
, unsigned long hpa
, unsigned int index
,
351 void *iodc_data
, unsigned int iodc_data_size
)
356 spin_lock_irqsave(&pdc_lock
, flags
);
357 retval
= mem_pdc_call(PDC_IODC
, PDC_IODC_READ
, __pa(pdc_result
), hpa
,
358 index
, __pa(pdc_result2
), iodc_data_size
);
359 convert_to_wide(pdc_result
);
360 *actcnt
= pdc_result
[0];
361 memcpy(iodc_data
, pdc_result2
, iodc_data_size
);
362 spin_unlock_irqrestore(&pdc_lock
, flags
);
366 EXPORT_SYMBOL(pdc_iodc_read
);
369 * pdc_system_map_find_mods - Locate unarchitected modules.
370 * @pdc_mod_info: Return buffer address.
371 * @mod_path: pointer to dev path structure.
372 * @mod_index: fixed address module index.
374 * To locate and identify modules which reside at fixed I/O addresses, which
375 * do not self-identify via architected bus walks.
377 int pdc_system_map_find_mods(struct pdc_system_map_mod_info
*pdc_mod_info
,
378 struct pdc_module_path
*mod_path
, long mod_index
)
383 spin_lock_irqsave(&pdc_lock
, flags
);
384 retval
= mem_pdc_call(PDC_SYSTEM_MAP
, PDC_FIND_MODULE
, __pa(pdc_result
),
385 __pa(pdc_result2
), mod_index
);
386 convert_to_wide(pdc_result
);
387 memcpy(pdc_mod_info
, pdc_result
, sizeof(*pdc_mod_info
));
388 memcpy(mod_path
, pdc_result2
, sizeof(*mod_path
));
389 spin_unlock_irqrestore(&pdc_lock
, flags
);
391 pdc_mod_info
->mod_addr
= f_extend(pdc_mod_info
->mod_addr
);
396 * pdc_system_map_find_addrs - Retrieve additional address ranges.
397 * @pdc_addr_info: Return buffer address.
398 * @mod_index: Fixed address module index.
399 * @addr_index: Address range index.
401 * Retrieve additional information about subsequent address ranges for modules
402 * with multiple address ranges.
404 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info
*pdc_addr_info
,
405 long mod_index
, long addr_index
)
410 spin_lock_irqsave(&pdc_lock
, flags
);
411 retval
= mem_pdc_call(PDC_SYSTEM_MAP
, PDC_FIND_ADDRESS
, __pa(pdc_result
),
412 mod_index
, addr_index
);
413 convert_to_wide(pdc_result
);
414 memcpy(pdc_addr_info
, pdc_result
, sizeof(*pdc_addr_info
));
415 spin_unlock_irqrestore(&pdc_lock
, flags
);
417 pdc_addr_info
->mod_addr
= f_extend(pdc_addr_info
->mod_addr
);
422 * pdc_model_info - Return model information about the processor.
423 * @model: The return buffer.
425 * Returns the version numbers, identifiers, and capabilities from the processor module.
427 int pdc_model_info(struct pdc_model
*model
)
432 spin_lock_irqsave(&pdc_lock
, flags
);
433 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_INFO
, __pa(pdc_result
), 0);
434 convert_to_wide(pdc_result
);
435 memcpy(model
, pdc_result
, sizeof(*model
));
436 spin_unlock_irqrestore(&pdc_lock
, flags
);
442 * pdc_model_sysmodel - Get the system model name.
443 * @name: A char array of at least 81 characters.
445 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
446 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
449 int pdc_model_sysmodel(char *name
)
454 spin_lock_irqsave(&pdc_lock
, flags
);
455 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_SYSMODEL
, __pa(pdc_result
),
456 OS_ID_HPUX
, __pa(name
));
457 convert_to_wide(pdc_result
);
459 if (retval
== PDC_OK
) {
460 name
[pdc_result
[0]] = '\0'; /* add trailing '\0' */
464 spin_unlock_irqrestore(&pdc_lock
, flags
);
470 * pdc_model_versions - Identify the version number of each processor.
471 * @cpu_id: The return buffer.
472 * @id: The id of the processor to check.
474 * Returns the version number for each processor component.
476 * This comment was here before, but I do not know what it means :( -RB
477 * id: 0 = cpu revision, 1 = boot-rom-version
479 int pdc_model_versions(unsigned long *versions
, int id
)
484 spin_lock_irqsave(&pdc_lock
, flags
);
485 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_VERSIONS
, __pa(pdc_result
), id
);
486 convert_to_wide(pdc_result
);
487 *versions
= pdc_result
[0];
488 spin_unlock_irqrestore(&pdc_lock
, flags
);
494 * pdc_model_cpuid - Returns the CPU_ID.
495 * @cpu_id: The return buffer.
497 * Returns the CPU_ID value which uniquely identifies the cpu portion of
498 * the processor module.
500 int pdc_model_cpuid(unsigned long *cpu_id
)
505 spin_lock_irqsave(&pdc_lock
, flags
);
506 pdc_result
[0] = 0; /* preset zero (call may not be implemented!) */
507 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_CPU_ID
, __pa(pdc_result
), 0);
508 convert_to_wide(pdc_result
);
509 *cpu_id
= pdc_result
[0];
510 spin_unlock_irqrestore(&pdc_lock
, flags
);
516 * pdc_model_capabilities - Returns the platform capabilities.
517 * @capabilities: The return buffer.
519 * Returns information about platform support for 32- and/or 64-bit
520 * OSes, IO-PDIR coherency, and virtual aliasing.
522 int pdc_model_capabilities(unsigned long *capabilities
)
527 spin_lock_irqsave(&pdc_lock
, flags
);
528 pdc_result
[0] = 0; /* preset zero (call may not be implemented!) */
529 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_CAPABILITIES
, __pa(pdc_result
), 0);
530 convert_to_wide(pdc_result
);
531 if (retval
== PDC_OK
) {
532 *capabilities
= pdc_result
[0];
534 *capabilities
= PDC_MODEL_OS32
;
536 spin_unlock_irqrestore(&pdc_lock
, flags
);
542 * pdc_cache_info - Return cache and TLB information.
543 * @cache_info: The return buffer.
545 * Returns information about the processor's cache and TLB.
547 int pdc_cache_info(struct pdc_cache_info
*cache_info
)
552 spin_lock_irqsave(&pdc_lock
, flags
);
553 retval
= mem_pdc_call(PDC_CACHE
, PDC_CACHE_INFO
, __pa(pdc_result
), 0);
554 convert_to_wide(pdc_result
);
555 memcpy(cache_info
, pdc_result
, sizeof(*cache_info
));
556 spin_unlock_irqrestore(&pdc_lock
, flags
);
562 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
563 * @space_bits: Should be 0, if not, bad mojo!
565 * Returns information about Space ID hashing.
567 int pdc_spaceid_bits(unsigned long *space_bits
)
572 spin_lock_irqsave(&pdc_lock
, flags
);
574 retval
= mem_pdc_call(PDC_CACHE
, PDC_CACHE_RET_SPID
, __pa(pdc_result
), 0);
575 convert_to_wide(pdc_result
);
576 *space_bits
= pdc_result
[0];
577 spin_unlock_irqrestore(&pdc_lock
, flags
);
584 * pdc_btlb_info - Return block TLB information.
585 * @btlb: The return buffer.
587 * Returns information about the hardware Block TLB.
589 int pdc_btlb_info(struct pdc_btlb_info
*btlb
)
594 spin_lock_irqsave(&pdc_lock
, flags
);
595 retval
= mem_pdc_call(PDC_BLOCK_TLB
, PDC_BTLB_INFO
, __pa(pdc_result
), 0);
596 memcpy(btlb
, pdc_result
, sizeof(*btlb
));
597 spin_unlock_irqrestore(&pdc_lock
, flags
);
606 * pdc_mem_map_hpa - Find fixed module information.
607 * @address: The return buffer
608 * @mod_path: pointer to dev path structure.
610 * This call was developed for S700 workstations to allow the kernel to find
611 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
612 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
615 * This call is supported by all existing S700 workstations (up to Gecko).
617 int pdc_mem_map_hpa(struct pdc_memory_map
*address
,
618 struct pdc_module_path
*mod_path
)
623 spin_lock_irqsave(&pdc_lock
, flags
);
624 memcpy(pdc_result2
, mod_path
, sizeof(*mod_path
));
625 retval
= mem_pdc_call(PDC_MEM_MAP
, PDC_MEM_MAP_HPA
, __pa(pdc_result
),
627 memcpy(address
, pdc_result
, sizeof(*address
));
628 spin_unlock_irqrestore(&pdc_lock
, flags
);
632 #endif /* !CONFIG_PA20 */
635 * pdc_lan_station_id - Get the LAN address.
636 * @lan_addr: The return buffer.
637 * @hpa: The network device HPA.
639 * Get the LAN station address when it is not directly available from the LAN hardware.
641 int pdc_lan_station_id(char *lan_addr
, unsigned long hpa
)
646 spin_lock_irqsave(&pdc_lock
, flags
);
647 retval
= mem_pdc_call(PDC_LAN_STATION_ID
, PDC_LAN_STATION_ID_READ
,
648 __pa(pdc_result
), hpa
);
650 /* FIXME: else read MAC from NVRAM */
651 memset(lan_addr
, 0, PDC_LAN_STATION_ID_SIZE
);
653 memcpy(lan_addr
, pdc_result
, PDC_LAN_STATION_ID_SIZE
);
655 spin_unlock_irqrestore(&pdc_lock
, flags
);
659 EXPORT_SYMBOL(pdc_lan_station_id
);
662 * pdc_stable_read - Read data from Stable Storage.
663 * @staddr: Stable Storage address to access.
664 * @memaddr: The memory address where Stable Storage data shall be copied.
665 * @count: number of bytes to transfer. count is multiple of 4.
667 * This PDC call reads from the Stable Storage address supplied in staddr
668 * and copies count bytes to the memory address memaddr.
669 * The call will fail if staddr+count > PDC_STABLE size.
671 int pdc_stable_read(unsigned long staddr
, void *memaddr
, unsigned long count
)
676 spin_lock_irqsave(&pdc_lock
, flags
);
677 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_READ
, staddr
,
678 __pa(pdc_result
), count
);
679 convert_to_wide(pdc_result
);
680 memcpy(memaddr
, pdc_result
, count
);
681 spin_unlock_irqrestore(&pdc_lock
, flags
);
685 EXPORT_SYMBOL(pdc_stable_read
);
688 * pdc_stable_write - Write data to Stable Storage.
689 * @staddr: Stable Storage address to access.
690 * @memaddr: The memory address where Stable Storage data shall be read from.
691 * @count: number of bytes to transfer. count is multiple of 4.
693 * This PDC call reads count bytes from the supplied memaddr address,
694 * and copies count bytes to the Stable Storage address staddr.
695 * The call will fail if staddr+count > PDC_STABLE size.
697 int pdc_stable_write(unsigned long staddr
, void *memaddr
, unsigned long count
)
702 spin_lock_irqsave(&pdc_lock
, flags
);
703 memcpy(pdc_result
, memaddr
, count
);
704 convert_to_wide(pdc_result
);
705 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_WRITE
, staddr
,
706 __pa(pdc_result
), count
);
707 spin_unlock_irqrestore(&pdc_lock
, flags
);
711 EXPORT_SYMBOL(pdc_stable_write
);
714 * pdc_stable_get_size - Get Stable Storage size in bytes.
715 * @size: pointer where the size will be stored.
717 * This PDC call returns the number of bytes in the processor's Stable
718 * Storage, which is the number of contiguous bytes implemented in Stable
719 * Storage starting from staddr=0. size in an unsigned 64-bit integer
720 * which is a multiple of four.
722 int pdc_stable_get_size(unsigned long *size
)
727 spin_lock_irqsave(&pdc_lock
, flags
);
728 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_RETURN_SIZE
, __pa(pdc_result
));
729 *size
= pdc_result
[0];
730 spin_unlock_irqrestore(&pdc_lock
, flags
);
734 EXPORT_SYMBOL(pdc_stable_get_size
);
737 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
739 * This PDC call is meant to be used to check the integrity of the current
740 * contents of Stable Storage.
742 int pdc_stable_verify_contents(void)
747 spin_lock_irqsave(&pdc_lock
, flags
);
748 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_VERIFY_CONTENTS
);
749 spin_unlock_irqrestore(&pdc_lock
, flags
);
753 EXPORT_SYMBOL(pdc_stable_verify_contents
);
756 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
757 * the validity indicator.
759 * This PDC call will erase all contents of Stable Storage. Use with care!
761 int pdc_stable_initialize(void)
766 spin_lock_irqsave(&pdc_lock
, flags
);
767 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_INITIALIZE
);
768 spin_unlock_irqrestore(&pdc_lock
, flags
);
772 EXPORT_SYMBOL(pdc_stable_initialize
);
775 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
776 * @hwpath: fully bc.mod style path to the device.
777 * @initiator: the array to return the result into
779 * Get the SCSI operational parameters from PDC.
780 * Needed since HPUX never used BIOS or symbios card NVRAM.
781 * Most ncr/sym cards won't have an entry and just use whatever
782 * capabilities of the card are (eg Ultra, LVD). But there are
783 * several cases where it's useful:
784 * o set SCSI id for Multi-initiator clusters,
785 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
786 * o bus width exported is less than what the interface chip supports.
788 int pdc_get_initiator(struct hardware_path
*hwpath
, struct pdc_initiator
*initiator
)
793 spin_lock_irqsave(&pdc_lock
, flags
);
795 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
796 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
797 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
799 retval
= mem_pdc_call(PDC_INITIATOR
, PDC_GET_INITIATOR
,
800 __pa(pdc_result
), __pa(hwpath
));
804 if (pdc_result
[0] < 16) {
805 initiator
->host_id
= pdc_result
[0];
807 initiator
->host_id
= -1;
811 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
812 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
814 switch (pdc_result
[1]) {
815 case 1: initiator
->factor
= 50; break;
816 case 2: initiator
->factor
= 25; break;
817 case 5: initiator
->factor
= 12; break;
818 case 25: initiator
->factor
= 10; break;
819 case 20: initiator
->factor
= 12; break;
820 case 40: initiator
->factor
= 10; break;
821 default: initiator
->factor
= -1; break;
824 if (IS_SPROCKETS()) {
825 initiator
->width
= pdc_result
[4];
826 initiator
->mode
= pdc_result
[5];
828 initiator
->width
= -1;
829 initiator
->mode
= -1;
833 spin_unlock_irqrestore(&pdc_lock
, flags
);
835 return (retval
>= PDC_OK
);
837 EXPORT_SYMBOL(pdc_get_initiator
);
841 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
842 * @num_entries: The return value.
843 * @hpa: The HPA for the device.
845 * This PDC function returns the number of entries in the specified cell's
847 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
849 int pdc_pci_irt_size(unsigned long *num_entries
, unsigned long hpa
)
854 spin_lock_irqsave(&pdc_lock
, flags
);
855 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_GET_INT_TBL_SIZE
,
856 __pa(pdc_result
), hpa
);
857 convert_to_wide(pdc_result
);
858 *num_entries
= pdc_result
[0];
859 spin_unlock_irqrestore(&pdc_lock
, flags
);
865 * pdc_pci_irt - Get the PCI interrupt routing table.
866 * @num_entries: The number of entries in the table.
867 * @hpa: The Hard Physical Address of the device.
870 * Get the PCI interrupt routing table for the device at the given HPA.
871 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
873 int pdc_pci_irt(unsigned long num_entries
, unsigned long hpa
, void *tbl
)
878 BUG_ON((unsigned long)tbl
& 0x7);
880 spin_lock_irqsave(&pdc_lock
, flags
);
881 pdc_result
[0] = num_entries
;
882 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_GET_INT_TBL
,
883 __pa(pdc_result
), hpa
, __pa(tbl
));
884 spin_unlock_irqrestore(&pdc_lock
, flags
);
890 #if 0 /* UNTEST CODE - left here in case someone needs it */
893 * pdc_pci_config_read - read PCI config space.
894 * @hpa token from PDC to indicate which PCI device
895 * @pci_addr configuration space address to read from
897 * Read PCI Configuration space *before* linux PCI subsystem is running.
899 unsigned int pdc_pci_config_read(void *hpa
, unsigned long cfg_addr
)
904 spin_lock_irqsave(&pdc_lock
, flags
);
907 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_READ_CONFIG
,
908 __pa(pdc_result
), hpa
, cfg_addr
&~3UL, 4UL);
909 spin_unlock_irqrestore(&pdc_lock
, flags
);
911 return retval
? ~0 : (unsigned int) pdc_result
[0];
916 * pdc_pci_config_write - read PCI config space.
917 * @hpa token from PDC to indicate which PCI device
918 * @pci_addr configuration space address to write
919 * @val value we want in the 32-bit register
921 * Write PCI Configuration space *before* linux PCI subsystem is running.
923 void pdc_pci_config_write(void *hpa
, unsigned long cfg_addr
, unsigned int val
)
928 spin_lock_irqsave(&pdc_lock
, flags
);
930 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_WRITE_CONFIG
,
931 __pa(pdc_result
), hpa
,
932 cfg_addr
&~3UL, 4UL, (unsigned long) val
);
933 spin_unlock_irqrestore(&pdc_lock
, flags
);
937 #endif /* UNTESTED CODE */
940 * pdc_tod_read - Read the Time-Of-Day clock.
941 * @tod: The return buffer:
943 * Read the Time-Of-Day clock
945 int pdc_tod_read(struct pdc_tod
*tod
)
950 spin_lock_irqsave(&pdc_lock
, flags
);
951 retval
= mem_pdc_call(PDC_TOD
, PDC_TOD_READ
, __pa(pdc_result
), 0);
952 convert_to_wide(pdc_result
);
953 memcpy(tod
, pdc_result
, sizeof(*tod
));
954 spin_unlock_irqrestore(&pdc_lock
, flags
);
958 EXPORT_SYMBOL(pdc_tod_read
);
961 * pdc_tod_set - Set the Time-Of-Day clock.
962 * @sec: The number of seconds since epoch.
963 * @usec: The number of micro seconds.
965 * Set the Time-Of-Day clock.
967 int pdc_tod_set(unsigned long sec
, unsigned long usec
)
972 spin_lock_irqsave(&pdc_lock
, flags
);
973 retval
= mem_pdc_call(PDC_TOD
, PDC_TOD_WRITE
, sec
, usec
);
974 spin_unlock_irqrestore(&pdc_lock
, flags
);
978 EXPORT_SYMBOL(pdc_tod_set
);
981 int pdc_mem_mem_table(struct pdc_memory_table_raddr
*r_addr
,
982 struct pdc_memory_table
*tbl
, unsigned long entries
)
987 spin_lock_irqsave(&pdc_lock
, flags
);
988 retval
= mem_pdc_call(PDC_MEM
, PDC_MEM_TABLE
, __pa(pdc_result
), __pa(pdc_result2
), entries
);
989 convert_to_wide(pdc_result
);
990 memcpy(r_addr
, pdc_result
, sizeof(*r_addr
));
991 memcpy(tbl
, pdc_result2
, entries
* sizeof(*tbl
));
992 spin_unlock_irqrestore(&pdc_lock
, flags
);
996 #endif /* CONFIG_64BIT */
998 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
999 * so I guessed at unsigned long. Someone who knows what this does, can fix
1002 int pdc_do_firm_test_reset(unsigned long ftc_bitmap
)
1005 unsigned long flags
;
1007 spin_lock_irqsave(&pdc_lock
, flags
);
1008 retval
= mem_pdc_call(PDC_BROADCAST_RESET
, PDC_DO_FIRM_TEST_RESET
,
1009 PDC_FIRM_TEST_MAGIC
, ftc_bitmap
);
1010 spin_unlock_irqrestore(&pdc_lock
, flags
);
1016 * pdc_do_reset - Reset the system.
1020 int pdc_do_reset(void)
1023 unsigned long flags
;
1025 spin_lock_irqsave(&pdc_lock
, flags
);
1026 retval
= mem_pdc_call(PDC_BROADCAST_RESET
, PDC_DO_RESET
);
1027 spin_unlock_irqrestore(&pdc_lock
, flags
);
1033 * pdc_soft_power_info - Enable soft power switch.
1034 * @power_reg: address of soft power register
1036 * Return the absolute address of the soft power switch register
1038 int __init
pdc_soft_power_info(unsigned long *power_reg
)
1041 unsigned long flags
;
1043 *power_reg
= (unsigned long) (-1);
1045 spin_lock_irqsave(&pdc_lock
, flags
);
1046 retval
= mem_pdc_call(PDC_SOFT_POWER
, PDC_SOFT_POWER_INFO
, __pa(pdc_result
), 0);
1047 if (retval
== PDC_OK
) {
1048 convert_to_wide(pdc_result
);
1049 *power_reg
= f_extend(pdc_result
[0]);
1051 spin_unlock_irqrestore(&pdc_lock
, flags
);
1057 * pdc_soft_power_button - Control the soft power button behaviour
1058 * @sw_control: 0 for hardware control, 1 for software control
1061 * This PDC function places the soft power button under software or
1063 * Under software control the OS may control to when to allow to shut
1064 * down the system. Under hardware control pressing the power button
1065 * powers off the system immediately.
1067 int pdc_soft_power_button(int sw_control
)
1070 unsigned long flags
;
1072 spin_lock_irqsave(&pdc_lock
, flags
);
1073 retval
= mem_pdc_call(PDC_SOFT_POWER
, PDC_SOFT_POWER_ENABLE
, __pa(pdc_result
), sw_control
);
1074 spin_unlock_irqrestore(&pdc_lock
, flags
);
1080 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1081 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1082 * who knows what other platform firmware might do with this OS "hook".
1084 void pdc_io_reset(void)
1086 unsigned long flags
;
1088 spin_lock_irqsave(&pdc_lock
, flags
);
1089 mem_pdc_call(PDC_IO
, PDC_IO_RESET
, 0);
1090 spin_unlock_irqrestore(&pdc_lock
, flags
);
1094 * pdc_io_reset_devices - Hack to Stop USB controller
1096 * If PDC used the usb controller, the usb controller
1097 * is still running and will crash the machines during iommu
1098 * setup, because of still running DMA. This PDC call
1099 * stops the USB controller.
1100 * Normally called after calling pdc_io_reset().
1102 void pdc_io_reset_devices(void)
1104 unsigned long flags
;
1106 spin_lock_irqsave(&pdc_lock
, flags
);
1107 mem_pdc_call(PDC_IO
, PDC_IO_RESET_DEVICES
, 0);
1108 spin_unlock_irqrestore(&pdc_lock
, flags
);
1111 /* locked by pdc_console_lock */
1112 static int __attribute__((aligned(8))) iodc_retbuf
[32];
1113 static char __attribute__((aligned(64))) iodc_dbuf
[4096];
1116 * pdc_iodc_print - Console print using IODC.
1117 * @str: the string to output.
1118 * @count: length of str
1120 * Note that only these special chars are architected for console IODC io:
1121 * BEL, BS, CR, and LF. Others are passed through.
1122 * Since the HP console requires CR+LF to perform a 'newline', we translate
1125 int pdc_iodc_print(const unsigned char *str
, unsigned count
)
1128 unsigned long flags
;
1130 for (i
= 0; i
< count
;) {
1133 iodc_dbuf
[i
+0] = '\r';
1134 iodc_dbuf
[i
+1] = '\n';
1138 iodc_dbuf
[i
] = str
[i
];
1145 spin_lock_irqsave(&pdc_lock
, flags
);
1146 real32_call(PAGE0
->mem_cons
.iodc_io
,
1147 (unsigned long)PAGE0
->mem_cons
.hpa
, ENTRY_IO_COUT
,
1148 PAGE0
->mem_cons
.spa
, __pa(PAGE0
->mem_cons
.dp
.layers
),
1149 __pa(iodc_retbuf
), 0, __pa(iodc_dbuf
), i
, 0);
1150 spin_unlock_irqrestore(&pdc_lock
, flags
);
1156 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1158 * Read a character (non-blocking) from the PDC console, returns -1 if
1159 * key is not present.
1161 int pdc_iodc_getc(void)
1165 unsigned long flags
;
1167 /* Bail if no console input device. */
1168 if (!PAGE0
->mem_kbd
.iodc_io
)
1171 /* wait for a keyboard (rs232)-input */
1172 spin_lock_irqsave(&pdc_lock
, flags
);
1173 real32_call(PAGE0
->mem_kbd
.iodc_io
,
1174 (unsigned long)PAGE0
->mem_kbd
.hpa
, ENTRY_IO_CIN
,
1175 PAGE0
->mem_kbd
.spa
, __pa(PAGE0
->mem_kbd
.dp
.layers
),
1176 __pa(iodc_retbuf
), 0, __pa(iodc_dbuf
), 1, 0);
1179 status
= *iodc_retbuf
;
1180 spin_unlock_irqrestore(&pdc_lock
, flags
);
1188 int pdc_sti_call(unsigned long func
, unsigned long flags
,
1189 unsigned long inptr
, unsigned long outputr
,
1190 unsigned long glob_cfg
)
1193 unsigned long irqflags
;
1195 spin_lock_irqsave(&pdc_lock
, irqflags
);
1196 retval
= real32_call(func
, flags
, inptr
, outputr
, glob_cfg
);
1197 spin_unlock_irqrestore(&pdc_lock
, irqflags
);
1201 EXPORT_SYMBOL(pdc_sti_call
);
1205 * pdc_pat_cell_get_number - Returns the cell number.
1206 * @cell_info: The return buffer.
1208 * This PDC call returns the cell number of the cell from which the call
1211 int pdc_pat_cell_get_number(struct pdc_pat_cell_num
*cell_info
)
1214 unsigned long flags
;
1216 spin_lock_irqsave(&pdc_lock
, flags
);
1217 retval
= mem_pdc_call(PDC_PAT_CELL
, PDC_PAT_CELL_GET_NUMBER
, __pa(pdc_result
));
1218 memcpy(cell_info
, pdc_result
, sizeof(*cell_info
));
1219 spin_unlock_irqrestore(&pdc_lock
, flags
);
1225 * pdc_pat_cell_module - Retrieve the cell's module information.
1226 * @actcnt: The number of bytes written to mem_addr.
1227 * @ploc: The physical location.
1228 * @mod: The module index.
1229 * @view_type: The view of the address type.
1230 * @mem_addr: The return buffer.
1232 * This PDC call returns information about each module attached to the cell
1233 * at the specified location.
1235 int pdc_pat_cell_module(unsigned long *actcnt
, unsigned long ploc
, unsigned long mod
,
1236 unsigned long view_type
, void *mem_addr
)
1239 unsigned long flags
;
1240 static struct pdc_pat_cell_mod_maddr_block result
__attribute__ ((aligned (8)));
1242 spin_lock_irqsave(&pdc_lock
, flags
);
1243 retval
= mem_pdc_call(PDC_PAT_CELL
, PDC_PAT_CELL_MODULE
, __pa(pdc_result
),
1244 ploc
, mod
, view_type
, __pa(&result
));
1246 *actcnt
= pdc_result
[0];
1247 memcpy(mem_addr
, &result
, *actcnt
);
1249 spin_unlock_irqrestore(&pdc_lock
, flags
);
1255 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1256 * @cpu_info: The return buffer.
1257 * @hpa: The Hard Physical Address of the CPU.
1259 * Retrieve the cpu number for the cpu at the specified HPA.
1261 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num
*cpu_info
, void *hpa
)
1264 unsigned long flags
;
1266 spin_lock_irqsave(&pdc_lock
, flags
);
1267 retval
= mem_pdc_call(PDC_PAT_CPU
, PDC_PAT_CPU_GET_NUMBER
,
1268 __pa(&pdc_result
), hpa
);
1269 memcpy(cpu_info
, pdc_result
, sizeof(*cpu_info
));
1270 spin_unlock_irqrestore(&pdc_lock
, flags
);
1276 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1277 * @num_entries: The return value.
1278 * @cell_num: The target cell.
1280 * This PDC function returns the number of entries in the specified cell's
1283 int pdc_pat_get_irt_size(unsigned long *num_entries
, unsigned long cell_num
)
1286 unsigned long flags
;
1288 spin_lock_irqsave(&pdc_lock
, flags
);
1289 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE
,
1290 __pa(pdc_result
), cell_num
);
1291 *num_entries
= pdc_result
[0];
1292 spin_unlock_irqrestore(&pdc_lock
, flags
);
1298 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1299 * @r_addr: The return buffer.
1300 * @cell_num: The target cell.
1302 * This PDC function returns the actual interrupt table for the specified cell.
1304 int pdc_pat_get_irt(void *r_addr
, unsigned long cell_num
)
1307 unsigned long flags
;
1309 spin_lock_irqsave(&pdc_lock
, flags
);
1310 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_GET_PCI_ROUTING_TABLE
,
1311 __pa(r_addr
), cell_num
);
1312 spin_unlock_irqrestore(&pdc_lock
, flags
);
1318 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1319 * @actlen: The return buffer.
1320 * @mem_addr: Pointer to the memory buffer.
1321 * @count: The number of bytes to read from the buffer.
1322 * @offset: The offset with respect to the beginning of the buffer.
1325 int pdc_pat_pd_get_addr_map(unsigned long *actual_len
, void *mem_addr
,
1326 unsigned long count
, unsigned long offset
)
1329 unsigned long flags
;
1331 spin_lock_irqsave(&pdc_lock
, flags
);
1332 retval
= mem_pdc_call(PDC_PAT_PD
, PDC_PAT_PD_GET_ADDR_MAP
, __pa(pdc_result
),
1333 __pa(pdc_result2
), count
, offset
);
1334 *actual_len
= pdc_result
[0];
1335 memcpy(mem_addr
, pdc_result2
, *actual_len
);
1336 spin_unlock_irqrestore(&pdc_lock
, flags
);
1342 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1343 * @pci_addr: PCI configuration space address for which the read request is being made.
1344 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1345 * @mem_addr: Pointer to return memory buffer.
1348 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr
, int pci_size
, u32
*mem_addr
)
1351 unsigned long flags
;
1353 spin_lock_irqsave(&pdc_lock
, flags
);
1354 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_PCI_CONFIG_READ
,
1355 __pa(pdc_result
), pci_addr
, pci_size
);
1357 case 1: *(u8
*) mem_addr
= (u8
) pdc_result
[0];
1358 case 2: *(u16
*)mem_addr
= (u16
) pdc_result
[0];
1359 case 4: *(u32
*)mem_addr
= (u32
) pdc_result
[0];
1361 spin_unlock_irqrestore(&pdc_lock
, flags
);
1367 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1368 * @pci_addr: PCI configuration space address for which the write request is being made.
1369 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1370 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1371 * written to PCI Config space.
1374 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr
, int pci_size
, u32 val
)
1377 unsigned long flags
;
1379 spin_lock_irqsave(&pdc_lock
, flags
);
1380 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_PCI_CONFIG_WRITE
,
1381 pci_addr
, pci_size
, val
);
1382 spin_unlock_irqrestore(&pdc_lock
, flags
);
1386 #endif /* CONFIG_64BIT */
1389 /***************** 32-bit real-mode calls ***********/
1390 /* The struct below is used
1391 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1392 * real32_call_asm() then uses this stack in narrow real mode
1395 struct narrow_stack
{
1396 /* use int, not long which is 64 bits */
1411 unsigned int frame_marker
[8];
1413 /* in reality, there's nearly 8k of stack after this */
1416 long real32_call(unsigned long fn
, ...)
1419 extern struct narrow_stack real_stack
;
1420 extern unsigned long real32_call_asm(unsigned int *,
1425 real_stack
.arg0
= va_arg(args
, unsigned int);
1426 real_stack
.arg1
= va_arg(args
, unsigned int);
1427 real_stack
.arg2
= va_arg(args
, unsigned int);
1428 real_stack
.arg3
= va_arg(args
, unsigned int);
1429 real_stack
.arg4
= va_arg(args
, unsigned int);
1430 real_stack
.arg5
= va_arg(args
, unsigned int);
1431 real_stack
.arg6
= va_arg(args
, unsigned int);
1432 real_stack
.arg7
= va_arg(args
, unsigned int);
1433 real_stack
.arg8
= va_arg(args
, unsigned int);
1434 real_stack
.arg9
= va_arg(args
, unsigned int);
1435 real_stack
.arg10
= va_arg(args
, unsigned int);
1436 real_stack
.arg11
= va_arg(args
, unsigned int);
1437 real_stack
.arg12
= va_arg(args
, unsigned int);
1438 real_stack
.arg13
= va_arg(args
, unsigned int);
1441 return real32_call_asm(&real_stack
.sp
, &real_stack
.arg0
, fn
);
1445 /***************** 64-bit real-mode calls ***********/
1458 unsigned long arg10
;
1459 unsigned long arg11
;
1460 unsigned long arg12
;
1461 unsigned long arg13
;
1462 unsigned long frame_marker
[2]; /* rp, previous sp */
1464 /* in reality, there's nearly 8k of stack after this */
1467 long real64_call(unsigned long fn
, ...)
1470 extern struct wide_stack real64_stack
;
1471 extern unsigned long real64_call_asm(unsigned long *,
1476 real64_stack
.arg0
= va_arg(args
, unsigned long);
1477 real64_stack
.arg1
= va_arg(args
, unsigned long);
1478 real64_stack
.arg2
= va_arg(args
, unsigned long);
1479 real64_stack
.arg3
= va_arg(args
, unsigned long);
1480 real64_stack
.arg4
= va_arg(args
, unsigned long);
1481 real64_stack
.arg5
= va_arg(args
, unsigned long);
1482 real64_stack
.arg6
= va_arg(args
, unsigned long);
1483 real64_stack
.arg7
= va_arg(args
, unsigned long);
1484 real64_stack
.arg8
= va_arg(args
, unsigned long);
1485 real64_stack
.arg9
= va_arg(args
, unsigned long);
1486 real64_stack
.arg10
= va_arg(args
, unsigned long);
1487 real64_stack
.arg11
= va_arg(args
, unsigned long);
1488 real64_stack
.arg12
= va_arg(args
, unsigned long);
1489 real64_stack
.arg13
= va_arg(args
, unsigned long);
1492 return real64_call_asm(&real64_stack
.sp
, &real64_stack
.arg0
, fn
);
1495 #endif /* CONFIG_64BIT */