David S. Miller | ccc3402 | 2008-05-01 21:28:59 -0700 | [diff] [blame] | 1 | /* memory.c: Prom routine for acquiring various bits of information |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * about RAM on the machine, both virtual and physical. |
| 3 | * |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 4 | * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (C) 1997 Michael A. Griffith (grif@acm.org) |
| 6 | */ |
| 7 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | #include <linux/kernel.h> |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 9 | #include <linux/sort.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/init.h> |
| 11 | |
| 12 | #include <asm/openprom.h> |
| 13 | #include <asm/sun4prom.h> |
| 14 | #include <asm/oplib.h> |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 15 | #include <asm/page.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 17 | static int __init prom_meminit_v0(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | { |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 19 | struct linux_mlist_v0 *p; |
| 20 | int index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 22 | index = 0; |
| 23 | for (p = *(romvec->pv_v0mem.v0_available); p; p = p->theres_more) { |
| 24 | sp_banks[index].base_addr = (unsigned long) p->start_adr; |
| 25 | sp_banks[index].num_bytes = p->num_bytes; |
| 26 | index++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | } |
| 28 | |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 29 | return index; |
| 30 | } |
| 31 | |
| 32 | static int __init prom_meminit_v2(void) |
| 33 | { |
| 34 | struct linux_prom_registers reg[64]; |
| 35 | int node, size, num_ents, i; |
| 36 | |
| 37 | node = prom_searchsiblings(prom_getchild(prom_root_node), "memory"); |
| 38 | size = prom_getproperty(node, "available", (char *) reg, sizeof(reg)); |
| 39 | num_ents = size / sizeof(struct linux_prom_registers); |
| 40 | |
| 41 | for (i = 0; i < num_ents; i++) { |
| 42 | sp_banks[i].base_addr = reg[i].phys_addr; |
| 43 | sp_banks[i].num_bytes = reg[i].reg_size; |
| 44 | } |
| 45 | |
| 46 | return num_ents; |
| 47 | } |
| 48 | |
| 49 | static int __init prom_meminit_sun4(void) |
| 50 | { |
| 51 | #ifdef CONFIG_SUN4 |
| 52 | sp_banks[0].base_addr = 0; |
| 53 | sp_banks[0].num_bytes = *(sun4_romvec->memoryavail); |
| 54 | #endif |
| 55 | return 1; |
| 56 | } |
| 57 | |
| 58 | static int sp_banks_cmp(const void *a, const void *b) |
| 59 | { |
| 60 | const struct sparc_phys_banks *x = a, *y = b; |
| 61 | |
| 62 | if (x->base_addr > y->base_addr) |
| 63 | return 1; |
| 64 | if (x->base_addr < y->base_addr) |
| 65 | return -1; |
| 66 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | } |
| 68 | |
| 69 | /* Initialize the memory lists based upon the prom version. */ |
| 70 | void __init prom_meminit(void) |
| 71 | { |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 72 | int i, num_ents = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 74 | switch (prom_vers) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | case PROM_V0: |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 76 | num_ents = prom_meminit_v0(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | break; |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | case PROM_V2: |
| 80 | case PROM_V3: |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 81 | num_ents = prom_meminit_v2(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | break; |
| 83 | |
| 84 | case PROM_SUN4: |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 85 | num_ents = prom_meminit_sun4(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | break; |
| 87 | |
| 88 | default: |
| 89 | break; |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 90 | } |
| 91 | sort(sp_banks, num_ents, sizeof(struct sparc_phys_banks), |
| 92 | sp_banks_cmp, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
David S. Miller | 9f2b2a5 | 2008-05-01 22:28:17 -0700 | [diff] [blame^] | 94 | /* Sentinel. */ |
| 95 | sp_banks[num_ents].base_addr = 0xdeadbeef; |
| 96 | sp_banks[num_ents].num_bytes = 0; |
| 97 | |
| 98 | for (i = 0; i < num_ents; i++) |
| 99 | sp_banks[i].num_bytes &= PAGE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |