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).
411 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
414 int pdc_model_sysmodel(char *name
)
418 spin_lock_irq(&pdc_lock
);
419 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_SYSMODEL
, __pa(pdc_result
),
420 OS_ID_HPUX
, __pa(name
));
421 convert_to_wide(pdc_result
);
423 if (retval
== PDC_OK
) {
424 name
[pdc_result
[0]] = '\0'; /* add trailing '\0' */
428 spin_unlock_irq(&pdc_lock
);
434 * pdc_model_versions - Identify the version number of each processor.
435 * @cpu_id: The return buffer.
436 * @id: The id of the processor to check.
438 * Returns the version number for each processor component.
440 * This comment was here before, but I do not know what it means :( -RB
441 * id: 0 = cpu revision, 1 = boot-rom-version
443 int pdc_model_versions(unsigned long *versions
, int id
)
447 spin_lock_irq(&pdc_lock
);
448 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_VERSIONS
, __pa(pdc_result
), id
);
449 convert_to_wide(pdc_result
);
450 *versions
= pdc_result
[0];
451 spin_unlock_irq(&pdc_lock
);
457 * pdc_model_cpuid - Returns the CPU_ID.
458 * @cpu_id: The return buffer.
460 * Returns the CPU_ID value which uniquely identifies the cpu portion of
461 * the processor module.
463 int pdc_model_cpuid(unsigned long *cpu_id
)
467 spin_lock_irq(&pdc_lock
);
468 pdc_result
[0] = 0; /* preset zero (call may not be implemented!) */
469 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_CPU_ID
, __pa(pdc_result
), 0);
470 convert_to_wide(pdc_result
);
471 *cpu_id
= pdc_result
[0];
472 spin_unlock_irq(&pdc_lock
);
478 * pdc_model_capabilities - Returns the platform capabilities.
479 * @capabilities: The return buffer.
481 * Returns information about platform support for 32- and/or 64-bit
482 * OSes, IO-PDIR coherency, and virtual aliasing.
484 int pdc_model_capabilities(unsigned long *capabilities
)
488 spin_lock_irq(&pdc_lock
);
489 pdc_result
[0] = 0; /* preset zero (call may not be implemented!) */
490 retval
= mem_pdc_call(PDC_MODEL
, PDC_MODEL_CAPABILITIES
, __pa(pdc_result
), 0);
491 convert_to_wide(pdc_result
);
492 *capabilities
= pdc_result
[0];
493 spin_unlock_irq(&pdc_lock
);
499 * pdc_cache_info - Return cache and TLB information.
500 * @cache_info: The return buffer.
502 * Returns information about the processor's cache and TLB.
504 int pdc_cache_info(struct pdc_cache_info
*cache_info
)
508 spin_lock_irq(&pdc_lock
);
509 retval
= mem_pdc_call(PDC_CACHE
, PDC_CACHE_INFO
, __pa(pdc_result
), 0);
510 convert_to_wide(pdc_result
);
511 memcpy(cache_info
, pdc_result
, sizeof(*cache_info
));
512 spin_unlock_irq(&pdc_lock
);
518 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
519 * @space_bits: Should be 0, if not, bad mojo!
521 * Returns information about Space ID hashing.
523 int pdc_spaceid_bits(unsigned long *space_bits
)
527 spin_lock_irq(&pdc_lock
);
529 retval
= mem_pdc_call(PDC_CACHE
, PDC_CACHE_RET_SPID
, __pa(pdc_result
), 0);
530 convert_to_wide(pdc_result
);
531 *space_bits
= pdc_result
[0];
532 spin_unlock_irq(&pdc_lock
);
539 * pdc_btlb_info - Return block TLB information.
540 * @btlb: The return buffer.
542 * Returns information about the hardware Block TLB.
544 int pdc_btlb_info(struct pdc_btlb_info
*btlb
)
548 spin_lock_irq(&pdc_lock
);
549 retval
= mem_pdc_call(PDC_BLOCK_TLB
, PDC_BTLB_INFO
, __pa(pdc_result
), 0);
550 memcpy(btlb
, pdc_result
, sizeof(*btlb
));
551 spin_unlock_irq(&pdc_lock
);
560 * pdc_mem_map_hpa - Find fixed module information.
561 * @address: The return buffer
562 * @mod_path: pointer to dev path structure.
564 * This call was developed for S700 workstations to allow the kernel to find
565 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
566 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
569 * This call is supported by all existing S700 workstations (up to Gecko).
571 int pdc_mem_map_hpa(struct pdc_memory_map
*address
,
572 struct pdc_module_path
*mod_path
)
576 spin_lock_irq(&pdc_lock
);
577 memcpy(pdc_result2
, mod_path
, sizeof(*mod_path
));
578 retval
= mem_pdc_call(PDC_MEM_MAP
, PDC_MEM_MAP_HPA
, __pa(pdc_result
),
580 memcpy(address
, pdc_result
, sizeof(*address
));
581 spin_unlock_irq(&pdc_lock
);
585 #endif /* !CONFIG_PA20 */
588 * pdc_lan_station_id - Get the LAN address.
589 * @lan_addr: The return buffer.
590 * @hpa: The network device HPA.
592 * Get the LAN station address when it is not directly available from the LAN hardware.
594 int pdc_lan_station_id(char *lan_addr
, unsigned long hpa
)
598 spin_lock_irq(&pdc_lock
);
599 retval
= mem_pdc_call(PDC_LAN_STATION_ID
, PDC_LAN_STATION_ID_READ
,
600 __pa(pdc_result
), hpa
);
602 /* FIXME: else read MAC from NVRAM */
603 memset(lan_addr
, 0, PDC_LAN_STATION_ID_SIZE
);
605 memcpy(lan_addr
, pdc_result
, PDC_LAN_STATION_ID_SIZE
);
607 spin_unlock_irq(&pdc_lock
);
611 EXPORT_SYMBOL(pdc_lan_station_id
);
614 * pdc_stable_read - Read data from Stable Storage.
615 * @staddr: Stable Storage address to access.
616 * @memaddr: The memory address where Stable Storage data shall be copied.
617 * @count: number of bytes to transfert. count is multiple of 4.
619 * This PDC call reads from the Stable Storage address supplied in staddr
620 * and copies count bytes to the memory address memaddr.
621 * The call will fail if staddr+count > PDC_STABLE size.
623 int pdc_stable_read(unsigned long staddr
, void *memaddr
, unsigned long count
)
627 spin_lock_irq(&pdc_lock
);
628 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_READ
, staddr
,
629 __pa(pdc_result
), count
);
630 convert_to_wide(pdc_result
);
631 memcpy(memaddr
, pdc_result
, count
);
632 spin_unlock_irq(&pdc_lock
);
636 EXPORT_SYMBOL(pdc_stable_read
);
639 * pdc_stable_write - Write data to Stable Storage.
640 * @staddr: Stable Storage address to access.
641 * @memaddr: The memory address where Stable Storage data shall be read from.
642 * @count: number of bytes to transfert. count is multiple of 4.
644 * This PDC call reads count bytes from the supplied memaddr address,
645 * and copies count bytes to the Stable Storage address staddr.
646 * The call will fail if staddr+count > PDC_STABLE size.
648 int pdc_stable_write(unsigned long staddr
, void *memaddr
, unsigned long count
)
652 spin_lock_irq(&pdc_lock
);
653 memcpy(pdc_result
, memaddr
, count
);
654 convert_to_wide(pdc_result
);
655 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_WRITE
, staddr
,
656 __pa(pdc_result
), count
);
657 spin_unlock_irq(&pdc_lock
);
661 EXPORT_SYMBOL(pdc_stable_write
);
664 * pdc_stable_get_size - Get Stable Storage size in bytes.
665 * @size: pointer where the size will be stored.
667 * This PDC call returns the number of bytes in the processor's Stable
668 * Storage, which is the number of contiguous bytes implemented in Stable
669 * Storage starting from staddr=0. size in an unsigned 64-bit integer
670 * which is a multiple of four.
672 int pdc_stable_get_size(unsigned long *size
)
676 spin_lock_irq(&pdc_lock
);
677 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_RETURN_SIZE
, __pa(pdc_result
));
678 *size
= pdc_result
[0];
679 spin_unlock_irq(&pdc_lock
);
683 EXPORT_SYMBOL(pdc_stable_get_size
);
686 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
688 * This PDC call is meant to be used to check the integrity of the current
689 * contents of Stable Storage.
691 int pdc_stable_verify_contents(void)
695 spin_lock_irq(&pdc_lock
);
696 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_VERIFY_CONTENTS
);
697 spin_unlock_irq(&pdc_lock
);
701 EXPORT_SYMBOL(pdc_stable_verify_contents
);
704 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
705 * the validity indicator.
707 * This PDC call will erase all contents of Stable Storage. Use with care!
709 int pdc_stable_initialize(void)
713 spin_lock_irq(&pdc_lock
);
714 retval
= mem_pdc_call(PDC_STABLE
, PDC_STABLE_INITIALIZE
);
715 spin_unlock_irq(&pdc_lock
);
719 EXPORT_SYMBOL(pdc_stable_initialize
);
722 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
723 * @hwpath: fully bc.mod style path to the device.
724 * @initiator: the array to return the result into
726 * Get the SCSI operational parameters from PDC.
727 * Needed since HPUX never used BIOS or symbios card NVRAM.
728 * Most ncr/sym cards won't have an entry and just use whatever
729 * capabilities of the card are (eg Ultra, LVD). But there are
730 * several cases where it's useful:
731 * o set SCSI id for Multi-initiator clusters,
732 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
733 * o bus width exported is less than what the interface chip supports.
735 int pdc_get_initiator(struct hardware_path
*hwpath
, struct pdc_initiator
*initiator
)
739 spin_lock_irq(&pdc_lock
);
741 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
742 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
743 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
745 retval
= mem_pdc_call(PDC_INITIATOR
, PDC_GET_INITIATOR
,
746 __pa(pdc_result
), __pa(hwpath
));
750 if (pdc_result
[0] < 16) {
751 initiator
->host_id
= pdc_result
[0];
753 initiator
->host_id
= -1;
757 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
758 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
760 switch (pdc_result
[1]) {
761 case 1: initiator
->factor
= 50; break;
762 case 2: initiator
->factor
= 25; break;
763 case 5: initiator
->factor
= 12; break;
764 case 25: initiator
->factor
= 10; break;
765 case 20: initiator
->factor
= 12; break;
766 case 40: initiator
->factor
= 10; break;
767 default: initiator
->factor
= -1; break;
770 if (IS_SPROCKETS()) {
771 initiator
->width
= pdc_result
[4];
772 initiator
->mode
= pdc_result
[5];
774 initiator
->width
= -1;
775 initiator
->mode
= -1;
779 spin_unlock_irq(&pdc_lock
);
780 return (retval
>= PDC_OK
);
782 EXPORT_SYMBOL(pdc_get_initiator
);
786 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
787 * @num_entries: The return value.
788 * @hpa: The HPA for the device.
790 * This PDC function returns the number of entries in the specified cell's
792 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
794 int pdc_pci_irt_size(unsigned long *num_entries
, unsigned long hpa
)
798 spin_lock_irq(&pdc_lock
);
799 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_GET_INT_TBL_SIZE
,
800 __pa(pdc_result
), hpa
);
801 convert_to_wide(pdc_result
);
802 *num_entries
= pdc_result
[0];
803 spin_unlock_irq(&pdc_lock
);
809 * pdc_pci_irt - Get the PCI interrupt routing table.
810 * @num_entries: The number of entries in the table.
811 * @hpa: The Hard Physical Address of the device.
814 * Get the PCI interrupt routing table for the device at the given HPA.
815 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
817 int pdc_pci_irt(unsigned long num_entries
, unsigned long hpa
, void *tbl
)
821 BUG_ON((unsigned long)tbl
& 0x7);
823 spin_lock_irq(&pdc_lock
);
824 pdc_result
[0] = num_entries
;
825 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_GET_INT_TBL
,
826 __pa(pdc_result
), hpa
, __pa(tbl
));
827 spin_unlock_irq(&pdc_lock
);
833 #if 0 /* UNTEST CODE - left here in case someone needs it */
836 * pdc_pci_config_read - read PCI config space.
837 * @hpa token from PDC to indicate which PCI device
838 * @pci_addr configuration space address to read from
840 * Read PCI Configuration space *before* linux PCI subsystem is running.
842 unsigned int pdc_pci_config_read(void *hpa
, unsigned long cfg_addr
)
845 spin_lock_irq(&pdc_lock
);
848 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_READ_CONFIG
,
849 __pa(pdc_result
), hpa
, cfg_addr
&~3UL, 4UL);
850 spin_unlock_irq(&pdc_lock
);
851 return retval
? ~0 : (unsigned int) pdc_result
[0];
856 * pdc_pci_config_write - read PCI config space.
857 * @hpa token from PDC to indicate which PCI device
858 * @pci_addr configuration space address to write
859 * @val value we want in the 32-bit register
861 * Write PCI Configuration space *before* linux PCI subsystem is running.
863 void pdc_pci_config_write(void *hpa
, unsigned long cfg_addr
, unsigned int val
)
866 spin_lock_irq(&pdc_lock
);
868 retval
= mem_pdc_call(PDC_PCI_INDEX
, PDC_PCI_WRITE_CONFIG
,
869 __pa(pdc_result
), hpa
,
870 cfg_addr
&~3UL, 4UL, (unsigned long) val
);
871 spin_unlock_irq(&pdc_lock
);
874 #endif /* UNTESTED CODE */
877 * pdc_tod_read - Read the Time-Of-Day clock.
878 * @tod: The return buffer:
880 * Read the Time-Of-Day clock
882 int pdc_tod_read(struct pdc_tod
*tod
)
886 spin_lock_irq(&pdc_lock
);
887 retval
= mem_pdc_call(PDC_TOD
, PDC_TOD_READ
, __pa(pdc_result
), 0);
888 convert_to_wide(pdc_result
);
889 memcpy(tod
, pdc_result
, sizeof(*tod
));
890 spin_unlock_irq(&pdc_lock
);
894 EXPORT_SYMBOL(pdc_tod_read
);
897 * pdc_tod_set - Set the Time-Of-Day clock.
898 * @sec: The number of seconds since epoch.
899 * @usec: The number of micro seconds.
901 * Set the Time-Of-Day clock.
903 int pdc_tod_set(unsigned long sec
, unsigned long usec
)
907 spin_lock_irq(&pdc_lock
);
908 retval
= mem_pdc_call(PDC_TOD
, PDC_TOD_WRITE
, sec
, usec
);
909 spin_unlock_irq(&pdc_lock
);
913 EXPORT_SYMBOL(pdc_tod_set
);
916 int pdc_mem_mem_table(struct pdc_memory_table_raddr
*r_addr
,
917 struct pdc_memory_table
*tbl
, unsigned long entries
)
921 spin_lock_irq(&pdc_lock
);
922 retval
= mem_pdc_call(PDC_MEM
, PDC_MEM_TABLE
, __pa(pdc_result
), __pa(pdc_result2
), entries
);
923 convert_to_wide(pdc_result
);
924 memcpy(r_addr
, pdc_result
, sizeof(*r_addr
));
925 memcpy(tbl
, pdc_result2
, entries
* sizeof(*tbl
));
926 spin_unlock_irq(&pdc_lock
);
930 #endif /* __LP64__ */
932 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
933 * so I guessed at unsigned long. Someone who knows what this does, can fix
936 int pdc_do_firm_test_reset(unsigned long ftc_bitmap
)
940 spin_lock_irq(&pdc_lock
);
941 retval
= mem_pdc_call(PDC_BROADCAST_RESET
, PDC_DO_FIRM_TEST_RESET
,
942 PDC_FIRM_TEST_MAGIC
, ftc_bitmap
);
943 spin_unlock_irq(&pdc_lock
);
949 * pdc_do_reset - Reset the system.
953 int pdc_do_reset(void)
957 spin_lock_irq(&pdc_lock
);
958 retval
= mem_pdc_call(PDC_BROADCAST_RESET
, PDC_DO_RESET
);
959 spin_unlock_irq(&pdc_lock
);
965 * pdc_soft_power_info - Enable soft power switch.
966 * @power_reg: address of soft power register
968 * Return the absolute address of the soft power switch register
970 int __init
pdc_soft_power_info(unsigned long *power_reg
)
974 *power_reg
= (unsigned long) (-1);
976 spin_lock_irq(&pdc_lock
);
977 retval
= mem_pdc_call(PDC_SOFT_POWER
, PDC_SOFT_POWER_INFO
, __pa(pdc_result
), 0);
978 if (retval
== PDC_OK
) {
979 convert_to_wide(pdc_result
);
980 *power_reg
= f_extend(pdc_result
[0]);
982 spin_unlock_irq(&pdc_lock
);
988 * pdc_soft_power_button - Control the soft power button behaviour
989 * @sw_control: 0 for hardware control, 1 for software control
992 * This PDC function places the soft power button under software or
994 * Under software control the OS may control to when to allow to shut
995 * down the system. Under hardware control pressing the power button
996 * powers off the system immediately.
998 int pdc_soft_power_button(int sw_control
)
1001 spin_lock_irq(&pdc_lock
);
1002 retval
= mem_pdc_call(PDC_SOFT_POWER
, PDC_SOFT_POWER_ENABLE
, __pa(pdc_result
), sw_control
);
1003 spin_unlock_irq(&pdc_lock
);
1008 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1009 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1010 * who knows what other platform firmware might do with this OS "hook".
1012 void pdc_io_reset(void)
1014 spin_lock_irq(&pdc_lock
);
1015 mem_pdc_call(PDC_IO
, PDC_IO_RESET
, 0);
1016 spin_unlock_irq(&pdc_lock
);
1020 * pdc_io_reset_devices - Hack to Stop USB controller
1022 * If PDC used the usb controller, the usb controller
1023 * is still running and will crash the machines during iommu
1024 * setup, because of still running DMA. This PDC call
1025 * stops the USB controller.
1026 * Normally called after calling pdc_io_reset().
1028 void pdc_io_reset_devices(void)
1030 spin_lock_irq(&pdc_lock
);
1031 mem_pdc_call(PDC_IO
, PDC_IO_RESET_DEVICES
, 0);
1032 spin_unlock_irq(&pdc_lock
);
1037 * pdc_iodc_putc - Console character print using IODC.
1038 * @c: the character to output.
1040 * Note that only these special chars are architected for console IODC io:
1041 * BEL, BS, CR, and LF. Others are passed through.
1042 * Since the HP console requires CR+LF to perform a 'newline', we translate
1045 void pdc_iodc_putc(unsigned char c
)
1047 /* XXX Should we spinlock posx usage */
1048 static int posx
; /* for simple TAB-Simulation... */
1049 static int __attribute__((aligned(8))) iodc_retbuf
[32];
1050 static char __attribute__((aligned(64))) iodc_dbuf
[4096];
1056 iodc_dbuf
[0] = '\r';
1057 iodc_dbuf
[1] = '\n';
1063 while (posx
& 7) /* expand TAB */
1065 return; /* return since IODC can't handle this */
1075 spin_lock_irqsave(&pdc_lock
, flags
);
1076 real32_call(PAGE0
->mem_cons
.iodc_io
,
1077 (unsigned long)PAGE0
->mem_cons
.hpa
, ENTRY_IO_COUT
,
1078 PAGE0
->mem_cons
.spa
, __pa(PAGE0
->mem_cons
.dp
.layers
),
1079 __pa(iodc_retbuf
), 0, __pa(iodc_dbuf
), n
, 0);
1080 spin_unlock_irqrestore(&pdc_lock
, flags
);
1084 * pdc_iodc_outc - Console character print using IODC (without conversions).
1085 * @c: the character to output.
1087 * Write the character directly to the IODC console.
1089 void pdc_iodc_outc(unsigned char c
)
1091 unsigned int n
, flags
;
1093 /* fill buffer with one caracter and print it */
1094 static int __attribute__((aligned(8))) iodc_retbuf
[32];
1095 static char __attribute__((aligned(64))) iodc_dbuf
[4096];
1100 spin_lock_irqsave(&pdc_lock
, flags
);
1101 real32_call(PAGE0
->mem_cons
.iodc_io
,
1102 (unsigned long)PAGE0
->mem_cons
.hpa
, ENTRY_IO_COUT
,
1103 PAGE0
->mem_cons
.spa
, __pa(PAGE0
->mem_cons
.dp
.layers
),
1104 __pa(iodc_retbuf
), 0, __pa(iodc_dbuf
), n
, 0);
1105 spin_unlock_irqrestore(&pdc_lock
, flags
);
1109 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1111 * Read a character (non-blocking) from the PDC console, returns -1 if
1112 * key is not present.
1114 int pdc_iodc_getc(void)
1117 static int __attribute__((aligned(8))) iodc_retbuf
[32];
1118 static char __attribute__((aligned(64))) iodc_dbuf
[4096];
1122 /* Bail if no console input device. */
1123 if (!PAGE0
->mem_kbd
.iodc_io
)
1126 /* wait for a keyboard (rs232)-input */
1127 spin_lock_irqsave(&pdc_lock
, flags
);
1128 real32_call(PAGE0
->mem_kbd
.iodc_io
,
1129 (unsigned long)PAGE0
->mem_kbd
.hpa
, ENTRY_IO_CIN
,
1130 PAGE0
->mem_kbd
.spa
, __pa(PAGE0
->mem_kbd
.dp
.layers
),
1131 __pa(iodc_retbuf
), 0, __pa(iodc_dbuf
), 1, 0);
1134 status
= *iodc_retbuf
;
1135 spin_unlock_irqrestore(&pdc_lock
, flags
);
1143 int pdc_sti_call(unsigned long func
, unsigned long flags
,
1144 unsigned long inptr
, unsigned long outputr
,
1145 unsigned long glob_cfg
)
1149 spin_lock_irq(&pdc_lock
);
1150 retval
= real32_call(func
, flags
, inptr
, outputr
, glob_cfg
);
1151 spin_unlock_irq(&pdc_lock
);
1155 EXPORT_SYMBOL(pdc_sti_call
);
1159 * pdc_pat_cell_get_number - Returns the cell number.
1160 * @cell_info: The return buffer.
1162 * This PDC call returns the cell number of the cell from which the call
1165 int pdc_pat_cell_get_number(struct pdc_pat_cell_num
*cell_info
)
1169 spin_lock_irq(&pdc_lock
);
1170 retval
= mem_pdc_call(PDC_PAT_CELL
, PDC_PAT_CELL_GET_NUMBER
, __pa(pdc_result
));
1171 memcpy(cell_info
, pdc_result
, sizeof(*cell_info
));
1172 spin_unlock_irq(&pdc_lock
);
1178 * pdc_pat_cell_module - Retrieve the cell's module information.
1179 * @actcnt: The number of bytes written to mem_addr.
1180 * @ploc: The physical location.
1181 * @mod: The module index.
1182 * @view_type: The view of the address type.
1183 * @mem_addr: The return buffer.
1185 * This PDC call returns information about each module attached to the cell
1186 * at the specified location.
1188 int pdc_pat_cell_module(unsigned long *actcnt
, unsigned long ploc
, unsigned long mod
,
1189 unsigned long view_type
, void *mem_addr
)
1192 static struct pdc_pat_cell_mod_maddr_block result
__attribute__ ((aligned (8)));
1194 spin_lock_irq(&pdc_lock
);
1195 retval
= mem_pdc_call(PDC_PAT_CELL
, PDC_PAT_CELL_MODULE
, __pa(pdc_result
),
1196 ploc
, mod
, view_type
, __pa(&result
));
1198 *actcnt
= pdc_result
[0];
1199 memcpy(mem_addr
, &result
, *actcnt
);
1201 spin_unlock_irq(&pdc_lock
);
1207 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1208 * @cpu_info: The return buffer.
1209 * @hpa: The Hard Physical Address of the CPU.
1211 * Retrieve the cpu number for the cpu at the specified HPA.
1213 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num
*cpu_info
, void *hpa
)
1217 spin_lock_irq(&pdc_lock
);
1218 retval
= mem_pdc_call(PDC_PAT_CPU
, PDC_PAT_CPU_GET_NUMBER
,
1219 __pa(&pdc_result
), hpa
);
1220 memcpy(cpu_info
, pdc_result
, sizeof(*cpu_info
));
1221 spin_unlock_irq(&pdc_lock
);
1227 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1228 * @num_entries: The return value.
1229 * @cell_num: The target cell.
1231 * This PDC function returns the number of entries in the specified cell's
1234 int pdc_pat_get_irt_size(unsigned long *num_entries
, unsigned long cell_num
)
1238 spin_lock_irq(&pdc_lock
);
1239 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE
,
1240 __pa(pdc_result
), cell_num
);
1241 *num_entries
= pdc_result
[0];
1242 spin_unlock_irq(&pdc_lock
);
1248 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1249 * @r_addr: The return buffer.
1250 * @cell_num: The target cell.
1252 * This PDC function returns the actual interrupt table for the specified cell.
1254 int pdc_pat_get_irt(void *r_addr
, unsigned long cell_num
)
1258 spin_lock_irq(&pdc_lock
);
1259 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_GET_PCI_ROUTING_TABLE
,
1260 __pa(r_addr
), cell_num
);
1261 spin_unlock_irq(&pdc_lock
);
1267 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1268 * @actlen: The return buffer.
1269 * @mem_addr: Pointer to the memory buffer.
1270 * @count: The number of bytes to read from the buffer.
1271 * @offset: The offset with respect to the beginning of the buffer.
1274 int pdc_pat_pd_get_addr_map(unsigned long *actual_len
, void *mem_addr
,
1275 unsigned long count
, unsigned long offset
)
1279 spin_lock_irq(&pdc_lock
);
1280 retval
= mem_pdc_call(PDC_PAT_PD
, PDC_PAT_PD_GET_ADDR_MAP
, __pa(pdc_result
),
1281 __pa(pdc_result2
), count
, offset
);
1282 *actual_len
= pdc_result
[0];
1283 memcpy(mem_addr
, pdc_result2
, *actual_len
);
1284 spin_unlock_irq(&pdc_lock
);
1290 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1291 * @pci_addr: PCI configuration space address for which the read request is being made.
1292 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1293 * @mem_addr: Pointer to return memory buffer.
1296 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr
, int pci_size
, u32
*mem_addr
)
1299 spin_lock_irq(&pdc_lock
);
1300 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_PCI_CONFIG_READ
,
1301 __pa(pdc_result
), pci_addr
, pci_size
);
1303 case 1: *(u8
*) mem_addr
= (u8
) pdc_result
[0];
1304 case 2: *(u16
*)mem_addr
= (u16
) pdc_result
[0];
1305 case 4: *(u32
*)mem_addr
= (u32
) pdc_result
[0];
1307 spin_unlock_irq(&pdc_lock
);
1313 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1314 * @pci_addr: PCI configuration space address for which the write request is being made.
1315 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1316 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1317 * written to PCI Config space.
1320 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr
, int pci_size
, u32 val
)
1324 spin_lock_irq(&pdc_lock
);
1325 retval
= mem_pdc_call(PDC_PAT_IO
, PDC_PAT_IO_PCI_CONFIG_WRITE
,
1326 pci_addr
, pci_size
, val
);
1327 spin_unlock_irq(&pdc_lock
);
1331 #endif /* __LP64__ */
1334 /***************** 32-bit real-mode calls ***********/
1335 /* The struct below is used
1336 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1337 * real32_call_asm() then uses this stack in narrow real mode
1340 struct narrow_stack
{
1341 /* use int, not long which is 64 bits */
1356 unsigned int frame_marker
[8];
1358 /* in reality, there's nearly 8k of stack after this */
1361 long real32_call(unsigned long fn
, ...)
1364 extern struct narrow_stack real_stack
;
1365 extern unsigned long real32_call_asm(unsigned int *,
1370 real_stack
.arg0
= va_arg(args
, unsigned int);
1371 real_stack
.arg1
= va_arg(args
, unsigned int);
1372 real_stack
.arg2
= va_arg(args
, unsigned int);
1373 real_stack
.arg3
= va_arg(args
, unsigned int);
1374 real_stack
.arg4
= va_arg(args
, unsigned int);
1375 real_stack
.arg5
= va_arg(args
, unsigned int);
1376 real_stack
.arg6
= va_arg(args
, unsigned int);
1377 real_stack
.arg7
= va_arg(args
, unsigned int);
1378 real_stack
.arg8
= va_arg(args
, unsigned int);
1379 real_stack
.arg9
= va_arg(args
, unsigned int);
1380 real_stack
.arg10
= va_arg(args
, unsigned int);
1381 real_stack
.arg11
= va_arg(args
, unsigned int);
1382 real_stack
.arg12
= va_arg(args
, unsigned int);
1383 real_stack
.arg13
= va_arg(args
, unsigned int);
1386 return real32_call_asm(&real_stack
.sp
, &real_stack
.arg0
, fn
);
1390 /***************** 64-bit real-mode calls ***********/
1403 unsigned long arg10
;
1404 unsigned long arg11
;
1405 unsigned long arg12
;
1406 unsigned long arg13
;
1407 unsigned long frame_marker
[2]; /* rp, previous sp */
1409 /* in reality, there's nearly 8k of stack after this */
1412 long real64_call(unsigned long fn
, ...)
1415 extern struct wide_stack real64_stack
;
1416 extern unsigned long real64_call_asm(unsigned long *,
1421 real64_stack
.arg0
= va_arg(args
, unsigned long);
1422 real64_stack
.arg1
= va_arg(args
, unsigned long);
1423 real64_stack
.arg2
= va_arg(args
, unsigned long);
1424 real64_stack
.arg3
= va_arg(args
, unsigned long);
1425 real64_stack
.arg4
= va_arg(args
, unsigned long);
1426 real64_stack
.arg5
= va_arg(args
, unsigned long);
1427 real64_stack
.arg6
= va_arg(args
, unsigned long);
1428 real64_stack
.arg7
= va_arg(args
, unsigned long);
1429 real64_stack
.arg8
= va_arg(args
, unsigned long);
1430 real64_stack
.arg9
= va_arg(args
, unsigned long);
1431 real64_stack
.arg10
= va_arg(args
, unsigned long);
1432 real64_stack
.arg11
= va_arg(args
, unsigned long);
1433 real64_stack
.arg12
= va_arg(args
, unsigned long);
1434 real64_stack
.arg13
= va_arg(args
, unsigned long);
1437 return real64_call_asm(&real64_stack
.sp
, &real64_stack
.arg0
, fn
);
1440 #endif /* __LP64__ */