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>
28 #include <asm/mmzone.h>
30 #include <asm/pdcpat.h>
31 #include <asm/processor.h>
33 #include <asm/parisc-device.h>
37 ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
41 int pdc_type __read_mostly = PDC_TYPE_ILLEGAL;
43 /* cell number and location (PAT firmware only) */
44 unsigned long parisc_cell_num __read_mostly;
45 unsigned long parisc_cell_loc __read_mostly;
46 unsigned long parisc_pat_pdc_cap __read_mostly;
49 void __init setup_pdc(void)
53 struct pdc_system_map_mod_info module_result;
54 struct pdc_module_path module_path;
55 struct pdc_model model;
57 struct pdc_pat_cell_num cell_info;
60 /* Determine the pdc "type" used on this machine */
62 printk(KERN_INFO "Determining PDC firmware type: ");
64 status = pdc_system_map_find_mods(&module_result, &module_path, 0);
65 if (status == PDC_OK) {
66 pdc_type = PDC_TYPE_SYSTEM_MAP;
67 pr_cont("System Map.\n");
72 * If the machine doesn't support PDC_SYSTEM_MAP then either it
73 * is a pdc pat box, or it is an older box. All 64 bit capable
74 * machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.
78 * TODO: We should test for 64 bit capability and give a
83 status = pdc_pat_cell_get_number(&cell_info);
84 if (status == PDC_OK) {
85 unsigned long legacy_rev, pat_rev;
86 pdc_type = PDC_TYPE_PAT;
87 pr_cont("64 bit PAT.\n");
88 parisc_cell_num = cell_info.cell_num;
89 parisc_cell_loc = cell_info.cell_loc;
90 pr_info("PAT: Running on cell %lu and location %lu.\n",
91 parisc_cell_num, parisc_cell_loc);
92 status = pdc_pat_pd_get_pdc_revisions(&legacy_rev,
93 &pat_rev, &parisc_pat_pdc_cap);
94 pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",
95 legacy_rev, pat_rev, parisc_pat_pdc_cap,
97 & PDC_PAT_CAPABILITY_BIT_SIMULTANEOUS_PTLB ? 1:0,
99 & PDC_PAT_CAPABILITY_BIT_PDC_HPMC_RENDEZ ? 1:0);
104 /* Check the CPU's bus ID. There's probably a better test. */
106 status = pdc_model_info(&model);
108 bus_id = (model.hversion >> (4 + 7)) & 0x1f;
111 case 0x4: /* 720, 730, 750, 735, 755 */
112 case 0x6: /* 705, 710 */
113 case 0x7: /* 715, 725 */
114 case 0x8: /* 745, 747, 742 */
115 case 0xA: /* 712 and similar */
116 case 0xC: /* 715/64, at least */
118 pdc_type = PDC_TYPE_SNAKE;
122 default: /* Everything else */
124 pr_cont("Unsupported.\n");
125 panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
129 #define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
132 set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
133 unsigned long pages4k)
135 /* Rather than aligning and potentially throwing away
136 * memory, we'll assume that any ranges are already
137 * nicely aligned with any reasonable page size, and
138 * panic if they are not (it's more likely that the
139 * pdc info is bad in this case).
142 if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
143 || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
145 panic("Memory range doesn't align with page size!\n");
148 pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
149 pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
152 static void __init pagezero_memconfig(void)
154 unsigned long npages;
156 /* Use the 32 bit information from page zero to create a single
157 * entry in the pmem_ranges[] table.
159 * We currently don't support machines with contiguous memory
160 * >= 4 Gb, who report that memory using 64 bit only fields
161 * on page zero. It's not worth doing until it can be tested,
162 * and it is not clear we can support those machines for other
165 * If that support is done in the future, this is where it
169 npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
170 set_pmem_entry(pmem_ranges,0UL,npages);
176 /* All of the PDC PAT specific code is 64-bit only */
179 ** The module object is filled via PDC_PAT_CELL[Return Cell Module].
180 ** If a module is found, register module will get the IODC bytes via
181 ** pdc_iodc_read() using the PA view of conf_base_addr for the hpa parameter.
183 ** The IO view can be used by PDC_PAT_CELL[Return Cell Module]
184 ** only for SBAs and LBAs. This view will cause an invalid
185 ** argument error for all other cell module types.
190 pat_query_module(ulong pcell_loc, ulong mod_index)
192 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
193 unsigned long bytecnt;
194 unsigned long temp; /* 64-bit scratch value */
195 long status; /* PDC return value status */
196 struct parisc_device *dev;
198 pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
200 panic("couldn't allocate memory for PDC_PAT_CELL!");
202 /* return cell module (PA or Processor view) */
203 status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
204 PA_VIEW, pa_pdc_cell);
206 if (status != PDC_OK) {
207 /* no more cell modules or error */
212 temp = pa_pdc_cell->cba;
213 dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
219 /* alloc_pa_dev sets dev->hpa */
222 ** save parameters in the parisc_device
223 ** (The idea being the device driver will call pdc_pat_cell_module()
224 ** and store the results in its own data structure.)
226 dev->pcell_loc = pcell_loc;
227 dev->mod_index = mod_index;
229 /* save generic info returned from the call */
230 /* REVISIT: who is the consumer of this? not sure yet... */
231 dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */
232 dev->pmod_loc = pa_pdc_cell->mod_location;
233 dev->mod0 = pa_pdc_cell->mod[0];
235 register_parisc_device(dev); /* advertise device */
238 /* dump what we see so far... */
239 switch (PAT_GET_ENTITY(dev->mod_info)) {
240 pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
243 case PAT_ENTITY_PROC:
244 printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
245 pa_pdc_cell->mod[0]);
250 "PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
251 pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
252 pa_pdc_cell->mod[2]);
255 printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
259 printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
263 printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
267 printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
270 pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
271 IO_VIEW, &io_pdc_cell);
272 printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
273 for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
275 " PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
276 i, pa_pdc_cell->mod[2 + i * 3], /* type */
277 pa_pdc_cell->mod[3 + i * 3], /* start */
278 pa_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
280 " IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
281 i, io_pdc_cell.mod[2 + i * 3], /* type */
282 io_pdc_cell.mod[3 + i * 3], /* start */
283 io_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
285 printk(KERN_DEBUG "\n");
288 #endif /* DEBUG_PAT */
296 /* pat pdc can return information about a variety of different
297 * types of memory (e.g. firmware,i/o, etc) but we only care about
298 * the usable physical ram right now. Since the firmware specific
299 * information is allocated on the stack, we'll be generous, in
300 * case there is a lot of other information we don't care about.
303 #define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
305 static void __init pat_memconfig(void)
307 unsigned long actual_len;
308 struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
309 struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
310 physmem_range_t *pmem_ptr;
313 unsigned long length;
316 length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
318 status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
320 if ((status != PDC_OK)
321 || ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
323 /* The above pdc call shouldn't fail, but, just in
324 * case, just use the PAGE0 info.
328 printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
329 "All memory may not be used!\n\n\n");
330 pagezero_memconfig();
334 entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
336 if (entries > PAT_MAX_RANGES) {
337 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
338 printk(KERN_WARNING "Some memory may not be used!\n");
341 /* Copy information into the firmware independent pmem_ranges
342 * array, skipping types we don't care about. Notice we said
343 * "may" above. We'll use all the entries that were returned.
347 mtbl_ptr = mem_table;
348 pmem_ptr = pmem_ranges; /* Global firmware independent table */
349 for (i = 0; i < entries; i++,mtbl_ptr++) {
350 if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
351 || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
352 || (mtbl_ptr->pages == 0)
353 || ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
354 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
355 && (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
360 if (npmem_ranges == MAX_PHYSMEM_RANGES) {
361 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
362 printk(KERN_WARNING "Some memory will not be used!\n");
366 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
371 static int __init pat_inventory(void)
375 struct pdc_pat_cell_num cell_info;
378 ** Note: Prelude (and it's successors: Lclass, A400/500) only
379 ** implement PDC_PAT_CELL sub-options 0 and 2.
381 status = pdc_pat_cell_get_number(&cell_info);
382 if (status != PDC_OK) {
387 printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
391 while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
398 /* We only look for extended memory ranges on a 64 bit capable box */
399 static void __init sprockets_memconfig(void)
401 struct pdc_memory_table_raddr r_addr;
402 struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
403 struct pdc_memory_table *mtbl_ptr;
404 physmem_range_t *pmem_ptr;
409 status = pdc_mem_mem_table(&r_addr,mem_table,
410 (unsigned long)MAX_PHYSMEM_RANGES);
412 if (status != PDC_OK) {
414 /* The above pdc call only works on boxes with sprockets
415 * firmware (newer B,C,J class). Other non PAT PDC machines
416 * do support more than 3.75 Gb of memory, but we don't
420 pagezero_memconfig();
424 if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
425 printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
426 printk(KERN_WARNING "Some memory will not be used!\n");
429 entries = (int)r_addr.entries_returned;
432 mtbl_ptr = mem_table;
433 pmem_ptr = pmem_ranges; /* Global firmware independent table */
434 for (i = 0; i < entries; i++,mtbl_ptr++) {
435 set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
440 #else /* !CONFIG_64BIT */
442 #define pat_inventory() do { } while (0)
443 #define pat_memconfig() do { } while (0)
444 #define sprockets_memconfig() pagezero_memconfig()
446 #endif /* !CONFIG_64BIT */
451 /* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
453 static struct parisc_device * __init
454 legacy_create_device(struct pdc_memory_map *r_addr,
455 struct pdc_module_path *module_path)
457 struct parisc_device *dev;
458 int status = pdc_mem_map_hpa(r_addr, module_path);
459 if (status != PDC_OK)
462 dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
466 register_parisc_device(dev);
473 * Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
474 * To use it, we initialise the mod_path.bc to 0xff and try all values of
475 * mod to get the HPA for the top-level devices. Bus adapters may have
476 * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
477 * module, then trying all possible functions.
479 static void __init snake_inventory(void)
482 for (mod = 0; mod < 16; mod++) {
483 struct parisc_device *dev;
484 struct pdc_module_path module_path;
485 struct pdc_memory_map r_addr;
488 memset(module_path.path.bc, 0xff, 6);
489 module_path.path.mod = mod;
490 dev = legacy_create_device(&r_addr, &module_path);
491 if ((!dev) || (dev->id.hw_type != HPHW_BA))
494 memset(module_path.path.bc, 0xff, 4);
495 module_path.path.bc[4] = mod;
497 for (func = 0; func < 16; func++) {
498 module_path.path.bc[5] = 0;
499 module_path.path.mod = func;
500 legacy_create_device(&r_addr, &module_path);
505 #else /* CONFIG_PA20 */
506 #define snake_inventory() do { } while (0)
507 #endif /* CONFIG_PA20 */
509 /* Common 32/64 bit based code goes here */
512 * add_system_map_addresses - Add additional addresses to the parisc device.
513 * @dev: The parisc device.
514 * @num_addrs: Then number of addresses to add;
515 * @module_instance: The system_map module instance.
517 * This function adds any additional addresses reported by the system_map
518 * firmware to the parisc device.
521 add_system_map_addresses(struct parisc_device *dev, int num_addrs,
526 struct pdc_system_map_addr_info addr_result;
528 dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL);
530 printk(KERN_ERR "%s %s(): memory allocation failure\n",
535 for(i = 1; i <= num_addrs; ++i) {
536 status = pdc_system_map_find_addrs(&addr_result,
538 if(PDC_OK == status) {
539 dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
543 "Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
550 * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
552 * This function attempts to retrieve and register all the devices firmware
553 * knows about via the SYSTEM_MAP PDC call.
555 static void __init system_map_inventory(void)
558 long status = PDC_OK;
560 for (i = 0; i < 256; i++) {
561 struct parisc_device *dev;
562 struct pdc_system_map_mod_info module_result;
563 struct pdc_module_path module_path;
565 status = pdc_system_map_find_mods(&module_result,
567 if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
569 if (status != PDC_OK)
572 dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
576 register_parisc_device(dev);
578 /* if available, get the additional addresses for a module */
579 if (!module_result.add_addrs)
582 add_system_map_addresses(dev, module_result.add_addrs, i);
589 void __init do_memory_inventory(void)
597 case PDC_TYPE_SYSTEM_MAP:
598 sprockets_memconfig();
602 pagezero_memconfig();
606 panic("Unknown PDC type!\n");
609 if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
610 printk(KERN_WARNING "Bad memory configuration returned!\n");
611 printk(KERN_WARNING "Some memory may not be used!\n");
612 pagezero_memconfig();
616 void __init do_device_inventory(void)
618 printk(KERN_INFO "Searching for devices...\n");
628 case PDC_TYPE_SYSTEM_MAP:
629 system_map_inventory();
637 panic("Unknown PDC type!\n");
639 printk(KERN_INFO "Found devices:\n");
640 print_parisc_devices();