#include <linux/bitops.h>
#include <linux/lmb.h>
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) LMB_DBG(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
#define LMB_ALLOC_ANYWHERE 0
struct lmb lmb;
-void lmb_dump_all(void)
+static int lmb_debug;
+
+static int __init early_lmb(char *p)
{
-#ifdef DEBUG
- unsigned long i;
+ if (p && strstr(p, "debug"))
+ lmb_debug = 1;
+ return 0;
+}
+early_param("lmb", early_lmb);
- DBG("lmb_dump_all:\n");
- DBG(" memory.cnt = 0x%lx\n", lmb.memory.cnt);
- DBG(" memory.size = 0x%llx\n",
- (unsigned long long)lmb.memory.size);
- for (i=0; i < lmb.memory.cnt ;i++) {
- DBG(" memory.region[0x%x].base = 0x%llx\n",
- i, (unsigned long long)lmb.memory.region[i].base);
- DBG(" .size = 0x%llx\n",
- (unsigned long long)lmb.memory.region[i].size);
- }
+static void lmb_dump(struct lmb_region *region, char *name)
+{
+ unsigned long long base, size;
+ int i;
+
+ pr_info(" %s.cnt = 0x%lx\n", name, region->cnt);
- 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%llx\n",
- i, (unsigned long long)lmb.reserved.region[i].base);
- DBG(" .size = 0x%llx\n",
- (unsigned long long)lmb.reserved.region[i].size);
+ for (i = 0; i < region->cnt; i++) {
+ base = region->region[i].base;
+ size = region->region[i].size;
+
+ pr_info(" %s[0x%x]\t0x%016llx - 0x%016llx, 0x%llx bytes\n",
+ name, i, base, base + size - 1, size);
}
-#endif /* DEBUG */
}
-static unsigned long __init lmb_addrs_overlap(u64 base1,
- u64 size1, u64 base2, u64 size2)
+void lmb_dump_all(void)
+{
+ if (!lmb_debug)
+ return;
+
+ pr_info("LMB configuration:\n");
+ pr_info(" rmo_size = 0x%llx\n", (unsigned long long)lmb.rmo_size);
+ pr_info(" memory.size = 0x%llx\n", (unsigned long long)lmb.memory.size);
+
+ lmb_dump(&lmb.memory, "memory");
+ lmb_dump(&lmb.reserved, "reserved");
+}
+
+static unsigned long lmb_addrs_overlap(u64 base1, u64 size1, u64 base2,
+ u64 size2)
{
- return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
+ return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
}
-static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
- u64 base2, u64 size2)
+static long lmb_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2)
{
if (base2 == base1 + size1)
return 1;
return 0;
}
-static long __init lmb_regions_adjacent(struct lmb_region *rgn,
+static long lmb_regions_adjacent(struct lmb_region *rgn,
unsigned long r1, unsigned long r2)
{
u64 base1 = rgn->region[r1].base;
return lmb_addrs_adjacent(base1, size1, base2, size2);
}
-static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
+static void lmb_remove_region(struct lmb_region *rgn, unsigned long r)
{
unsigned long i;
}
/* Assumption: base addr of region 1 < base addr of region 2 */
-static void __init lmb_coalesce_regions(struct lmb_region *rgn,
+static void 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.
lmb.reserved.cnt = 1;
}
-/* This routine may be called with relocation disabled. */
void __init lmb_analyze(void)
{
int 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, u64 base, u64 size)
+static long lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
{
unsigned long coalesced = 0;
long adjacent, i;
}
/* First try and coalesce this LMB with another. */
- for (i=0; i < rgn->cnt; i++) {
+ for (i = 0; i < rgn->cnt; i++) {
u64 rgnbase = rgn->region[i].base;
u64 rgnsize = rgn->region[i].size;
/* Already have this region, so we're done */
return 0;
- adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
- if ( adjacent > 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 ) {
+ } else if (adjacent < 0) {
rgn->region[i].size += size;
coalesced++;
break;
}
}
- if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
+ if ((i < rgn->cnt - 1) && lmb_regions_adjacent(rgn, i, i+1)) {
lmb_coalesce_regions(rgn, i, i+1);
coalesced++;
}
return -1;
/* Couldn't coalesce the LMB, so add it to the sorted table. */
- for (i = rgn->cnt-1; i >= 0; i--) {
+ 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;
return 0;
}
-/* This routine may be called with relocation disabled. */
-long __init lmb_add(u64 base, u64 size)
+long lmb_add(u64 base, u64 size)
{
- struct lmb_region *_rgn = &(lmb.memory);
+ struct lmb_region *_rgn = &lmb.memory;
/* On pSeries LPAR systems, the first LMB is our RMO region. */
if (base == 0)
}
+static long __lmb_remove(struct lmb_region *rgn, u64 base, u64 size)
+{
+ u64 rgnbegin, rgnend;
+ u64 end = base + size;
+ int i;
+
+ rgnbegin = rgnend = 0; /* supress gcc warnings */
+
+ /* Find the region where (base, size) belongs to */
+ for (i=0; i < rgn->cnt; i++) {
+ rgnbegin = rgn->region[i].base;
+ rgnend = rgnbegin + rgn->region[i].size;
+
+ if ((rgnbegin <= base) && (end <= rgnend))
+ break;
+ }
+
+ /* Didn't find the region */
+ if (i == rgn->cnt)
+ return -1;
+
+ /* Check to see if we are removing entire region */
+ if ((rgnbegin == base) && (rgnend == end)) {
+ lmb_remove_region(rgn, i);
+ return 0;
+ }
+
+ /* Check to see if region is matching at the front */
+ if (rgnbegin == base) {
+ rgn->region[i].base = end;
+ rgn->region[i].size -= size;
+ return 0;
+ }
+
+ /* Check to see if the region is matching at the end */
+ if (rgnend == end) {
+ rgn->region[i].size -= size;
+ return 0;
+ }
+
+ /*
+ * We need to split the entry - adjust the current one to the
+ * beginging of the hole and add the region after hole.
+ */
+ rgn->region[i].size = base - rgn->region[i].base;
+ return lmb_add_region(rgn, end, rgnend - end);
+}
+
+long lmb_remove(u64 base, u64 size)
+{
+ return __lmb_remove(&lmb.memory, base, size);
+}
+
+long __init lmb_free(u64 base, u64 size)
+{
+ return __lmb_remove(&lmb.reserved, base, size);
+}
+
long __init lmb_reserve(u64 base, u64 size)
{
- struct lmb_region *_rgn = &(lmb.reserved);
+ 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, u64 base,
- u64 size)
+long lmb_overlaps_region(struct lmb_region *rgn, u64 base, u64 size)
{
unsigned long i;
- for (i=0; i < rgn->cnt; i++) {
+ for (i = 0; i < rgn->cnt; i++) {
u64 rgnbase = rgn->region[i].base;
u64 rgnsize = rgn->region[i].size;
- if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
+ if (lmb_addrs_overlap(base, size, rgnbase, rgnsize))
break;
- }
}
return (i < rgn->cnt) ? i : -1;
static u64 __init lmb_alloc_nid_unreserved(u64 start, u64 end,
u64 size, u64 align)
{
- u64 base;
+ u64 base, res_base;
long j;
base = lmb_align_down((end - size), align);
- while (start <= base &&
- ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0))
- base = lmb_align_down(lmb.reserved.region[j].base - size,
- align);
-
- if (base != 0 && start <= base) {
- if (lmb_add_region(&lmb.reserved, base,
- lmb_align_up(size, align)) < 0)
- base = ~(u64)0;
- return base;
+ while (start <= base) {
+ j = lmb_overlaps_region(&lmb.reserved, base, size);
+ if (j < 0) {
+ /* this area isn't reserved, take it */
+ if (lmb_add_region(&lmb.reserved, base, size) < 0)
+ base = ~(u64)0;
+ return base;
+ }
+ res_base = lmb.reserved.region[j].base;
+ if (res_base < size)
+ break;
+ base = lmb_align_down(res_base - size, align);
}
return ~(u64)0;
struct lmb_region *mem = &lmb.memory;
int i;
+ BUG_ON(0 == size);
+
+ size = lmb_align_up(size, align);
+
for (i = 0; i < mem->cnt; i++) {
u64 ret = lmb_alloc_nid_region(&mem->region[i],
nid_range,
{
long i, j;
u64 base = 0;
+ u64 res_base;
BUG_ON(0 == size);
+ size = lmb_align_up(size, align);
+
/* On some platforms, make sure we allocate lowmem */
+ /* Note that LMB_REAL_LIMIT may be LMB_ALLOC_ANYWHERE */
if (max_addr == LMB_ALLOC_ANYWHERE)
max_addr = LMB_REAL_LIMIT;
- for (i = lmb.memory.cnt-1; i >= 0; i--) {
+ for (i = lmb.memory.cnt - 1; i >= 0; i--) {
u64 lmbbase = lmb.memory.region[i].base;
u64 lmbsize = lmb.memory.region[i].size;
+ if (lmbsize < size)
+ continue;
if (max_addr == LMB_ALLOC_ANYWHERE)
base = lmb_align_down(lmbbase + lmbsize - size, align);
else if (lmbbase < max_addr) {
} else
continue;
- while ((lmbbase <= base) &&
- ((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0) )
- base = lmb_align_down(lmb.reserved.region[j].base - size,
- align);
-
- if ((base != 0) && (lmbbase <= base))
- break;
+ while (base && lmbbase <= base) {
+ j = lmb_overlaps_region(&lmb.reserved, base, size);
+ if (j < 0) {
+ /* this area isn't reserved, take it */
+ if (lmb_add_region(&lmb.reserved, base, size) < 0)
+ return 0;
+ return base;
+ }
+ res_base = lmb.reserved.region[j].base;
+ if (res_base < size)
+ break;
+ base = lmb_align_down(res_base - size, align);
+ }
}
-
- if (i < 0)
- return 0;
-
- if (lmb_add_region(&lmb.reserved, base, lmb_align_up(size, align)) < 0)
- return 0;
-
- return base;
+ return 0;
}
/* You must call lmb_analyze() before this. */
return lmb.memory.size;
}
-u64 __init lmb_end_of_DRAM(void)
+u64 lmb_end_of_DRAM(void)
{
int idx = lmb.memory.cnt - 1;
u64 limit;
struct lmb_property *p;
- if (! memory_limit)
+ if (!memory_limit)
return;
/* Truncate the lmb regions to satisfy the memory limit. */
if (lmb.memory.region[0].size < lmb.rmo_size)
lmb.rmo_size = lmb.memory.region[0].size;
+ memory_limit = lmb_end_of_DRAM();
+
/* And truncate any reserves above the limit also. */
for (i = 0; i < lmb.reserved.cnt; i++) {
p = &lmb.reserved.region[i];
}
return 0;
}
+
+int lmb_is_region_reserved(u64 base, u64 size)
+{
+ return lmb_overlaps_region(&lmb.reserved, base, size);
+}
+
+/*
+ * Given a <base, len>, find which memory regions belong to this range.
+ * Adjust the request and return a contiguous chunk.
+ */
+int lmb_find(struct lmb_property *res)
+{
+ int i;
+ u64 rstart, rend;
+
+ rstart = res->base;
+ rend = rstart + res->size - 1;
+
+ for (i = 0; i < lmb.memory.cnt; i++) {
+ u64 start = lmb.memory.region[i].base;
+ u64 end = start + lmb.memory.region[i].size - 1;
+
+ if (start > rend)
+ return -1;
+
+ if ((end >= rstart) && (start < rend)) {
+ /* adjust the request */
+ if (rstart < start)
+ rstart = start;
+ if (rend > end)
+ rend = end;
+ res->base = rstart;
+ res->size = rend - rstart + 1;
+ return 0;
+ }
+ }
+ return -1;
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff