4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries)
10 * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
12 * These are the routines to discover what hardware exists in this box.
13 * This task is complicated by there being 3 different ways of
14 * performing an inventory, depending largely on the age of the box.
15 * The recommended way to do this is to check to see whether the machine
16 * is a `Snake' first, then try System Map, then try PAT. We try System
17 * Map before checking for a Snake -- this probably doesn't cause any
21 #include <linux/types.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
26 #include <asm/hardware.h>
29 #include <asm/processor.h>
31 #include <asm/parisc-device.h>
35 ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
39 int pdc_type = PDC_TYPE_ILLEGAL;
41 void __init setup_pdc(void)
45 struct pdc_system_map_mod_info module_result;
46 struct pdc_module_path module_path;
47 struct pdc_model model;
49 struct pdc_pat_cell_num cell_info;
52 /* Determine the pdc "type" used on this machine */
54 printk(KERN_INFO "Determining PDC firmware type: ");
56 status = pdc_system_map_find_mods(&module_result, &module_path, 0);
57 if (status == PDC_OK) {
58 pdc_type = PDC_TYPE_SYSTEM_MAP;
59 printk("System Map.\n");
64 * If the machine doesn't support PDC_SYSTEM_MAP then either it
65 * is a pdc pat box, or it is an older box. All 64 bit capable
66 * machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.
70 * TODO: We should test for 64 bit capability and give a
75 status = pdc_pat_cell_get_number(&cell_info);
76 if (status == PDC_OK) {
77 pdc_type = PDC_TYPE_PAT;
78 printk("64 bit PAT.\n");
83 /* Check the CPU's bus ID. There's probably a better test. */
85 status = pdc_model_info(&model);
87 bus_id = (model.hversion >> (4 + 7)) & 0x1f;
90 case 0x4: /* 720, 730, 750, 735, 755 */
91 case 0x6: /* 705, 710 */
92 case 0x7: /* 715, 725 */
93 case 0x8: /* 745, 747, 742 */
94 case 0xA: /* 712 and similiar */
95 case 0xC: /* 715/64, at least */
97 pdc_type = PDC_TYPE_SNAKE;
101 default: /* Everything else */
103 printk("Unsupported.\n");
104 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
108 #define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
111 set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
112 unsigned long pages4k)
114 /* Rather than aligning and potentially throwing away
115 * memory, we'll assume that any ranges are already
116 * nicely aligned with any reasonable page size, and
117 * panic if they are not (it's more likely that the
118 * pdc info is bad in this case).
121 if ( ((start & (PAGE_SIZE - 1)) != 0)
122 || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) ) {
124 panic("Memory range doesn't align with page size!\n");
127 pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
128 pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
131 static void __init pagezero_memconfig(void)
133 unsigned long npages;
135 /* Use the 32 bit information from page zero to create a single
136 * entry in the pmem_ranges[] table.
138 * We currently don't support machines with contiguous memory
139 * >= 4 Gb, who report that memory using 64 bit only fields
140 * on page zero. It's not worth doing until it can be tested,
141 * and it is not clear we can support those machines for other
144 * If that support is done in the future, this is where it
148 npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
149 set_pmem_entry(pmem_ranges,0UL,npages);
155 /* All of the PDC PAT specific code is 64-bit only */
158 ** The module object is filled via PDC_PAT_CELL[Return Cell Module].
159 ** If a module is found, register module will get the IODC bytes via
160 ** pdc_iodc_read() using the PA view of conf_base_addr for the hpa parameter.
162 ** The IO view can be used by PDC_PAT_CELL[Return Cell Module]
163 ** only for SBAs and LBAs. This view will cause an invalid
164 ** argument error for all other cell module types.
169 pat_query_module(ulong pcell_loc, ulong mod_index)
171 pdc_pat_cell_mod_maddr_block_t pa_pdc_cell;
172 unsigned long bytecnt;
173 unsigned long temp; /* 64-bit scratch value */
174 long status; /* PDC return value status */
175 struct parisc_device *dev;
177 /* return cell module (PA or Processor view) */
178 status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
179 PA_VIEW, &pa_pdc_cell);
181 if (status != PDC_OK) {
182 /* no more cell modules or error */
186 temp = pa_pdc_cell.cba;
187 dev = alloc_pa_dev(PAT_GET_CBA(temp), &pa_pdc_cell.mod_path);
192 /* alloc_pa_dev sets dev->hpa */
195 ** save parameters in the parisc_device
196 ** (The idea being the device driver will call pdc_pat_cell_module()
197 ** and store the results in its own data structure.)
199 dev->pcell_loc = pcell_loc;
200 dev->mod_index = mod_index;
202 /* save generic info returned from the call */
203 /* REVISIT: who is the consumer of this? not sure yet... */
204 dev->mod_info = pa_pdc_cell.mod_info; /* pass to PAT_GET_ENTITY() */
205 dev->pmod_loc = pa_pdc_cell.mod_location;
207 register_parisc_device(dev); /* advertise device */
210 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
211 /* dump what we see so far... */
212 switch (PAT_GET_ENTITY(dev->mod_info)) {
215 case PAT_ENTITY_PROC:
216 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
222 "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
223 pa_pdc_cell.mod[0], pa_pdc_cell.mod[1],
227 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
231 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
235 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
239 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
242 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
243 IO_VIEW, &io_pdc_cell);
244 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell.mod[1]);
245 for (i = 0; i < pa_pdc_cell.mod[1]; i++) {
247 " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
248 i, pa_pdc_cell.mod[2 + i * 3], /* type */
249 pa_pdc_cell.mod[3 + i * 3], /* start */
250 pa_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
252 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
253 i, io_pdc_cell.mod[2 + i * 3], /* type */
254 io_pdc_cell.mod[3 + i * 3], /* start */
255 io_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
257 printk(KERN_DEBUG "\n");
260 #endif /* DEBUG_PAT */
265 /* pat pdc can return information about a variety of different
266 * types of memory (e.g. firmware,i/o, etc) but we only care about
267 * the usable physical ram right now. Since the firmware specific
268 * information is allocated on the stack, we'll be generous, in
269 * case there is a lot of other information we don't care about.
272 #define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
274 static void __init pat_memconfig(void)
276 unsigned long actual_len;
277 struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
278 struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
279 physmem_range_t *pmem_ptr;
282 unsigned long length;
285 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
287 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
289 if ((status != PDC_OK)
290 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
292 /* The above pdc call shouldn't fail, but, just in
293 * case, just use the PAGE0 info.
297 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
298 "All memory may not be used!\n\n\n");
299 pagezero_memconfig();
303 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
305 if (entries > PAT_MAX_RANGES) {
306 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
307 printk(KERN_WARNING "Some memory may not be used!\n");
310 /* Copy information into the firmware independent pmem_ranges
311 * array, skipping types we don't care about. Notice we said
312 * "may" above. We'll use all the entries that were returned.
316 mtbl_ptr = mem_table;
317 pmem_ptr = pmem_ranges; /* Global firmware independent table */
318 for (i = 0; i < entries; i++,mtbl_ptr++) {
319 if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
320 || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
321 || (mtbl_ptr->pages == 0)
322 || ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
323 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
324 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
329 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
330 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
331 printk(KERN_WARNING "Some memory will not be used!\n");
335 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
340 static int __init pat_inventory(void)
344 struct pdc_pat_cell_num cell_info;
347 ** Note: Prelude (and it's successors: Lclass, A400/500) only
348 ** implement PDC_PAT_CELL sub-options 0 and 2.
350 status = pdc_pat_cell_get_number(&cell_info);
351 if (status != PDC_OK) {
356 printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
360 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
367 /* We only look for extended memory ranges on a 64 bit capable box */
368 static void __init sprockets_memconfig(void)
370 struct pdc_memory_table_raddr r_addr;
371 struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
372 struct pdc_memory_table *mtbl_ptr;
373 physmem_range_t *pmem_ptr;
378 status = pdc_mem_mem_table(&r_addr,mem_table,
379 (unsigned long)MAX_PHYSMEM_RANGES);
381 if (status != PDC_OK) {
383 /* The above pdc call only works on boxes with sprockets
384 * firmware (newer B,C,J class). Other non PAT PDC machines
385 * do support more than 3.75 Gb of memory, but we don't
389 pagezero_memconfig();
393 if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
394 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
395 printk(KERN_WARNING "Some memory will not be used!\n");
398 entries = (int)r_addr.entries_returned;
401 mtbl_ptr = mem_table;
402 pmem_ptr = pmem_ranges; /* Global firmware independent table */
403 for (i = 0; i < entries; i++,mtbl_ptr++) {
404 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
409 #else /* !__LP64__ */
411 #define pat_inventory() do { } while (0)
412 #define pat_memconfig() do { } while (0)
413 #define sprockets_memconfig() pagezero_memconfig()
415 #endif /* !__LP64__ */
420 /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
422 static struct parisc_device * __init
423 legacy_create_device(struct pdc_memory_map *r_addr,
424 struct pdc_module_path *module_path)
426 struct parisc_device *dev;
427 int status = pdc_mem_map_hpa(r_addr, module_path);
428 if (status != PDC_OK)
431 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
435 register_parisc_device(dev);
442 * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
443 * To use it, we initialise the mod_path.bc to 0xff and try all values of
444 * mod to get the HPA for the top-level devices. Bus adapters may have
445 * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
446 * module, then trying all possible functions.
448 static void __init snake_inventory(void)
451 for (mod = 0; mod < 16; mod++) {
452 struct parisc_device *dev;
453 struct pdc_module_path module_path;
454 struct pdc_memory_map r_addr;
457 memset(module_path.path.bc, 0xff, 6);
458 module_path.path.mod = mod;
459 dev = legacy_create_device(&r_addr, &module_path);
460 if ((!dev) || (dev->id.hw_type != HPHW_BA))
463 memset(module_path.path.bc, 0xff, 4);
464 module_path.path.bc[4] = mod;
466 for (func = 0; func < 16; func++) {
467 module_path.path.bc[5] = 0;
468 module_path.path.mod = func;
469 legacy_create_device(&r_addr, &module_path);
474 #else /* CONFIG_PA20 */
475 #define snake_inventory() do { } while (0)
476 #endif /* CONFIG_PA20 */
478 /* Common 32/64 bit based code goes here */
481 * add_system_map_addresses - Add additional addresses to the parisc device.
482 * @dev: The parisc device.
483 * @num_addrs: Then number of addresses to add;
484 * @module_instance: The system_map module instance.
486 * This function adds any additional addresses reported by the system_map
487 * firmware to the parisc device.
490 add_system_map_addresses(struct parisc_device *dev, int num_addrs,
495 struct pdc_system_map_addr_info addr_result;
497 dev->addr = kmalloc(num_addrs * sizeof(unsigned long), GFP_KERNEL);
499 printk(KERN_ERR "%s %s(): memory allocation failure\n",
500 __FILE__, __FUNCTION__);
504 for(i = 1; i <= num_addrs; ++i) {
505 status = pdc_system_map_find_addrs(&addr_result,
507 if(PDC_OK == status) {
508 dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
512 "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
519 * do_system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
521 * This function attempts to retrieve and register all the devices firmware
522 * knows about via the SYSTEM_MAP PDC call.
524 static void __init system_map_inventory(void)
527 long status = PDC_OK;
529 for (i = 0; status != PDC_BAD_PROC && status != PDC_NE_MOD; i++) {
530 struct parisc_device *dev;
531 struct pdc_system_map_mod_info module_result;
532 struct pdc_module_path module_path;
534 status = pdc_system_map_find_mods(&module_result,
536 if (status != PDC_OK)
539 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
543 register_parisc_device(dev);
545 /* if available, get the additional addresses for a module */
546 if (!module_result.add_addrs)
549 add_system_map_addresses(dev, module_result.add_addrs, i);
556 void __init do_memory_inventory(void)
564 case PDC_TYPE_SYSTEM_MAP:
565 sprockets_memconfig();
569 pagezero_memconfig();
573 panic("Unknown PDC type!\n");
576 if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
577 printk(KERN_WARNING "Bad memory configuration returned!\n");
578 printk(KERN_WARNING "Some memory may not be used!\n");
579 pagezero_memconfig();
583 void __init do_device_inventory(void)
585 extern void parisc_generic_device_register(void);
587 printk(KERN_INFO "Searching for devices...\n");
595 case PDC_TYPE_SYSTEM_MAP:
596 system_map_inventory();
604 panic("Unknown PDC type!\n");
606 parisc_generic_device_register();
607 printk(KERN_INFO "Found devices:\n");
608 print_parisc_devices();