1ccc34028d46230f715eeda4c8cce27e919934fadDavid S. Miller/* memory.c: Prom routine for acquiring various bits of information 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * about RAM on the machine, both virtual and physical. 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 49f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller * Copyright (C) 1995, 2008 David S. Miller (davem@davemloft.net) 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1997 Michael A. Griffith (grif@acm.org) 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 99f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller#include <linux/sort.h> 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/openprom.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/oplib.h> 149f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller#include <asm/page.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 169f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Millerstatic int __init prom_meminit_v0(void) 179f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller{ 189f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller struct linux_mlist_v0 *p; 199f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller int index; 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 219f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller index = 0; 229f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller for (p = *(romvec->pv_v0mem.v0_available); p; p = p->theres_more) { 239f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[index].base_addr = (unsigned long) p->start_adr; 249f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[index].num_bytes = p->num_bytes; 259f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller index++; 269f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller } 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 289f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller return index; 299f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller} 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 319f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Millerstatic int __init prom_meminit_v2(void) 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 339f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller struct linux_prom_registers reg[64]; 348d1255627d4ce9cb4b9d0a1c44b6c18d92e84a99Andres Salomon phandle node; 358d1255627d4ce9cb4b9d0a1c44b6c18d92e84a99Andres Salomon int size, num_ents, i; 369f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 379f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller node = prom_searchsiblings(prom_getchild(prom_root_node), "memory"); 389f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller size = prom_getproperty(node, "available", (char *) reg, sizeof(reg)); 399f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller num_ents = size / sizeof(struct linux_prom_registers); 409f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 419f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller for (i = 0; i < num_ents; i++) { 429f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[i].base_addr = reg[i].phys_addr; 439f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[i].num_bytes = reg[i].reg_size; 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 469f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller return num_ents; 479f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller} 489f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 499f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Millerstatic int sp_banks_cmp(const void *a, const void *b) 509f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller{ 519f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller const struct sparc_phys_banks *x = a, *y = b; 529f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 539f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller if (x->base_addr > y->base_addr) 549f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller return 1; 559f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller if (x->base_addr < y->base_addr) 569f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller return -1; 579f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller return 0; 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize the memory lists based upon the prom version. */ 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init prom_meminit(void) 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 639f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller int i, num_ents = 0; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 659f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller switch (prom_vers) { 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PROM_V0: 679f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller num_ents = prom_meminit_v0(); 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 699f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PROM_V2: 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PROM_V3: 729f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller num_ents = prom_meminit_v2(); 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 779f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller } 789f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sort(sp_banks, num_ents, sizeof(struct sparc_phys_banks), 799f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks_cmp, NULL); 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 819f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller /* Sentinel. */ 829f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[num_ents].base_addr = 0xdeadbeef; 839f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[num_ents].num_bytes = 0; 849f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller 859f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller for (i = 0; i < num_ents; i++) 869f2b2a5f68c27c00f1e1f1922de5aa2f24505ed8David S. Miller sp_banks[i].num_bytes &= PAGE_MASK; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 88