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-rw-r--r--arch/powerpc/mm/lmb.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/arch/powerpc/mm/lmb.c b/arch/powerpc/mm/lmb.c
deleted file mode 100644
index 4ce23bcf8a57..000000000000
--- a/arch/powerpc/mm/lmb.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/*
- * Procedures for maintaining information about logical memory blocks.
- *
- * Peter Bergner, IBM Corp. June 2001.
- * Copyright (C) 2001 Peter Bergner.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <asm/types.h>
-#include <asm/page.h>
-#include <asm/prom.h>
-#include <asm/lmb.h>
-#ifdef CONFIG_PPC32
-#include "mmu_decl.h" /* for __max_low_memory */
-#endif
-
-#undef DEBUG
-
-#ifdef DEBUG
-#include <asm/udbg.h>
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-#define LMB_ALLOC_ANYWHERE 0
-
-struct lmb lmb;
-
-void lmb_dump_all(void)
-{
-#ifdef DEBUG
- unsigned long i;
-
- DBG("lmb_dump_all:\n");
- DBG(" memory.cnt = 0x%lx\n", lmb.memory.cnt);
- DBG(" memory.size = 0x%lx\n", lmb.memory.size);
- for (i=0; i < lmb.memory.cnt ;i++) {
- DBG(" memory.region[0x%x].base = 0x%lx\n",
- i, lmb.memory.region[i].base);
- DBG(" .size = 0x%lx\n",
- lmb.memory.region[i].size);
- }
-
- DBG("\n reserved.cnt = 0x%lx\n", lmb.reserved.cnt);
- DBG(" reserved.size = 0x%lx\n", lmb.reserved.size);
- for (i=0; i < lmb.reserved.cnt ;i++) {
- DBG(" reserved.region[0x%x].base = 0x%lx\n",
- i, lmb.reserved.region[i].base);
- DBG(" .size = 0x%lx\n",
- lmb.reserved.region[i].size);
- }
-#endif /* DEBUG */
-}
-
-static unsigned long __init lmb_addrs_overlap(unsigned long base1,
- unsigned long size1, unsigned long base2, unsigned long size2)
-{
- return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
-}
-
-static long __init lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
- unsigned long base2, unsigned long size2)
-{
- if (base2 == base1 + size1)
- return 1;
- else if (base1 == base2 + size2)
- return -1;
-
- return 0;
-}
-
-static long __init lmb_regions_adjacent(struct lmb_region *rgn,
- unsigned long r1, unsigned long r2)
-{
- unsigned long base1 = rgn->region[r1].base;
- unsigned long size1 = rgn->region[r1].size;
- unsigned long base2 = rgn->region[r2].base;
- unsigned long size2 = rgn->region[r2].size;
-
- return lmb_addrs_adjacent(base1, size1, base2, size2);
-}
-
-static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
-{
- unsigned long i;
-
- for (i = r; i < rgn->cnt - 1; i++) {
- rgn->region[i].base = rgn->region[i + 1].base;
- rgn->region[i].size = rgn->region[i + 1].size;
- }
- rgn->cnt--;
-}
-
-/* Assumption: base addr of region 1 < base addr of region 2 */
-static void __init lmb_coalesce_regions(struct lmb_region *rgn,
- unsigned long r1, unsigned long r2)
-{
- rgn->region[r1].size += rgn->region[r2].size;
- lmb_remove_region(rgn, r2);
-}
-
-/* This routine called with relocation disabled. */
-void __init lmb_init(void)
-{
- /* Create a dummy zero size LMB which will get coalesced away later.
- * This simplifies the lmb_add() code below...
- */
- lmb.memory.region[0].base = 0;
- lmb.memory.region[0].size = 0;
- lmb.memory.cnt = 1;
-
- /* Ditto. */
- lmb.reserved.region[0].base = 0;
- lmb.reserved.region[0].size = 0;
- lmb.reserved.cnt = 1;
-}
-
-/* This routine may be called with relocation disabled. */
-void __init lmb_analyze(void)
-{
- int i;
-
- lmb.memory.size = 0;
-
- for (i = 0; i < lmb.memory.cnt; i++)
- lmb.memory.size += lmb.memory.region[i].size;
-}
-
-/* This routine called with relocation disabled. */
-static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
- unsigned long size)
-{
- unsigned long coalesced = 0;
- long adjacent, i;
-
- /* First try and coalesce this LMB with another. */
- for (i=0; i < rgn->cnt; i++) {
- unsigned long rgnbase = rgn->region[i].base;
- unsigned long rgnsize = rgn->region[i].size;
-
- if ((rgnbase == base) && (rgnsize == size))
- /* Already have this region, so we're done */
- return 0;
-
- adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
- if ( adjacent > 0 ) {
- rgn->region[i].base -= size;
- rgn->region[i].size += size;
- coalesced++;
- break;
- }
- else if ( adjacent < 0 ) {
- rgn->region[i].size += size;
- coalesced++;
- break;
- }
- }
-
- if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
- lmb_coalesce_regions(rgn, i, i+1);
- coalesced++;
- }
-
- if (coalesced)
- return coalesced;
- if (rgn->cnt >= MAX_LMB_REGIONS)
- return -1;
-
- /* Couldn't coalesce the LMB, so add it to the sorted table. */
- for (i = rgn->cnt-1; i >= 0; i--) {
- if (base < rgn->region[i].base) {
- rgn->region[i+1].base = rgn->region[i].base;
- rgn->region[i+1].size = rgn->region[i].size;
- } else {
- rgn->region[i+1].base = base;
- rgn->region[i+1].size = size;
- break;
- }
- }
- rgn->cnt++;
-
- return 0;
-}
-
-/* This routine may be called with relocation disabled. */
-long __init lmb_add(unsigned long base, unsigned long size)
-{
- struct lmb_region *_rgn = &(lmb.memory);
-
- /* On pSeries LPAR systems, the first LMB is our RMO region. */
- if (base == 0)
- lmb.rmo_size = size;
-
- return lmb_add_region(_rgn, base, size);
-
-}
-
-long __init lmb_reserve(unsigned long base, unsigned long size)
-{
- struct lmb_region *_rgn = &(lmb.reserved);
-
- BUG_ON(0 == size);
-
- return lmb_add_region(_rgn, base, size);
-}
-
-long __init lmb_overlaps_region(struct lmb_region *rgn, unsigned long base,
- unsigned long size)
-{
- unsigned long i;
-
- for (i=0; i < rgn->cnt; i++) {
- unsigned long rgnbase = rgn->region[i].base;
- unsigned long rgnsize = rgn->region[i].size;
- if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
- break;
- }
- }
-
- return (i < rgn->cnt) ? i : -1;
-}
-
-unsigned long __init lmb_alloc(unsigned long size, unsigned long align)
-{
- return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
-}
-
-unsigned long __init lmb_alloc_base(unsigned long size, unsigned long align,
- unsigned long max_addr)
-{
- unsigned long alloc;
-
- alloc = __lmb_alloc_base(size, align, max_addr);
-
- if (alloc == 0)
- panic("ERROR: Failed to allocate 0x%lx bytes below 0x%lx.\n",
- size, max_addr);
-
- return alloc;
-}
-
-unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
- unsigned long max_addr)
-{
- long i, j;
- unsigned long base = 0;
-
- BUG_ON(0 == size);
-
-#ifdef CONFIG_PPC32
- /* On 32-bit, make sure we allocate lowmem */
- if (max_addr == LMB_ALLOC_ANYWHERE)
- max_addr = __max_low_memory;
-#endif
- for (i = lmb.memory.cnt-1; i >= 0; i--) {
- unsigned long lmbbase = lmb.memory.region[i].base;
- unsigned long lmbsize = lmb.memory.region[i].size;
-
- if (max_addr == LMB_ALLOC_ANYWHERE)
- base = _ALIGN_DOWN(lmbbase + lmbsize - size, align);
- else if (lmbbase < max_addr) {
- base = min(lmbbase + lmbsize, max_addr);
- base = _ALIGN_DOWN(base - size, align);
- } else
- continue;
-
- while ((lmbbase <= base) &&
- ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0) )
- base = _ALIGN_DOWN(lmb.reserved.region[j].base - size,
- align);
-
- if ((base != 0) && (lmbbase <= base))
- break;
- }
-
- if (i < 0)
- return 0;
-
- lmb_add_region(&lmb.reserved, base, size);
-
- return base;
-}
-
-/* You must call lmb_analyze() before this. */
-unsigned long __init lmb_phys_mem_size(void)
-{
- return lmb.memory.size;
-}
-
-unsigned long __init lmb_end_of_DRAM(void)
-{
- int idx = lmb.memory.cnt - 1;
-
- return (lmb.memory.region[idx].base + lmb.memory.region[idx].size);
-}
-
-/* You must call lmb_analyze() after this. */
-void __init lmb_enforce_memory_limit(unsigned long memory_limit)
-{
- unsigned long i, limit;
- struct lmb_property *p;
-
- if (! memory_limit)
- return;
-
- /* Truncate the lmb regions to satisfy the memory limit. */
- limit = memory_limit;
- for (i = 0; i < lmb.memory.cnt; i++) {
- if (limit > lmb.memory.region[i].size) {
- limit -= lmb.memory.region[i].size;
- continue;
- }
-
- lmb.memory.region[i].size = limit;
- lmb.memory.cnt = i + 1;
- break;
- }
-
- if (lmb.memory.region[0].size < lmb.rmo_size)
- lmb.rmo_size = lmb.memory.region[0].size;
-
- /* And truncate any reserves above the limit also. */
- for (i = 0; i < lmb.reserved.cnt; i++) {
- p = &lmb.reserved.region[i];
-
- if (p->base > memory_limit)
- p->size = 0;
- else if ((p->base + p->size) > memory_limit)
- p->size = memory_limit - p->base;
-
- if (p->size == 0) {
- lmb_remove_region(&lmb.reserved, i);
- i--;
- }
- }
-}
-
-int __init lmb_is_reserved(unsigned long addr)
-{
- int i;
-
- for (i = 0; i < lmb.reserved.cnt; i++) {
- unsigned long upper = lmb.reserved.region[i].base +
- lmb.reserved.region[i].size - 1;
- if ((addr >= lmb.reserved.region[i].base) && (addr <= upper))
- return 1;
- }
- return 0;
-}
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