#include <linux/bitops.h>
#include <linux/memblock.h>
-#define MEMBLOCK_ALLOC_ANYWHERE 0
-
struct memblock memblock;
static int memblock_debug;
}
early_param("memblock", early_memblock);
-static void memblock_dump(struct memblock_region *region, char *name)
+static void memblock_dump(struct memblock_type *region, char *name)
{
unsigned long long base, size;
int i;
pr_info(" %s.cnt = 0x%lx\n", name, region->cnt);
for (i = 0; i < region->cnt; i++) {
- base = region->region[i].base;
- size = region->region[i].size;
+ base = region->regions[i].base;
+ size = region->regions[i].size;
pr_info(" %s[0x%x]\t0x%016llx - 0x%016llx, 0x%llx bytes\n",
name, i, base, base + size - 1, size);
return;
pr_info("MEMBLOCK configuration:\n");
- pr_info(" rmo_size = 0x%llx\n", (unsigned long long)memblock.rmo_size);
- pr_info(" memory.size = 0x%llx\n", (unsigned long long)memblock.memory.size);
+ pr_info(" memory size = 0x%llx\n", (unsigned long long)memblock.memory_size);
memblock_dump(&memblock.memory, "memory");
memblock_dump(&memblock.reserved, "reserved");
}
-static unsigned long memblock_addrs_overlap(u64 base1, u64 size1, u64 base2,
- u64 size2)
+static unsigned long memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1,
+ phys_addr_t base2, phys_addr_t size2)
{
return ((base1 < (base2 + size2)) && (base2 < (base1 + size1)));
}
-static long memblock_addrs_adjacent(u64 base1, u64 size1, u64 base2, u64 size2)
+static long memblock_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
+ phys_addr_t base2, phys_addr_t size2)
{
if (base2 == base1 + size1)
return 1;
return 0;
}
-static long memblock_regions_adjacent(struct memblock_region *rgn,
- unsigned long r1, unsigned long r2)
+static long memblock_regions_adjacent(struct memblock_type *type,
+ unsigned long r1, unsigned long r2)
{
- u64 base1 = rgn->region[r1].base;
- u64 size1 = rgn->region[r1].size;
- u64 base2 = rgn->region[r2].base;
- u64 size2 = rgn->region[r2].size;
+ phys_addr_t base1 = type->regions[r1].base;
+ phys_addr_t size1 = type->regions[r1].size;
+ phys_addr_t base2 = type->regions[r2].base;
+ phys_addr_t size2 = type->regions[r2].size;
return memblock_addrs_adjacent(base1, size1, base2, size2);
}
-static void memblock_remove_region(struct memblock_region *rgn, unsigned long r)
+static void memblock_remove_region(struct memblock_type *type, 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;
+ for (i = r; i < type->cnt - 1; i++) {
+ type->regions[i].base = type->regions[i + 1].base;
+ type->regions[i].size = type->regions[i + 1].size;
}
- rgn->cnt--;
+ type->cnt--;
}
/* Assumption: base addr of region 1 < base addr of region 2 */
-static void memblock_coalesce_regions(struct memblock_region *rgn,
+static void memblock_coalesce_regions(struct memblock_type *type,
unsigned long r1, unsigned long r2)
{
- rgn->region[r1].size += rgn->region[r2].size;
- memblock_remove_region(rgn, r2);
+ type->regions[r1].size += type->regions[r2].size;
+ memblock_remove_region(type, r2);
}
void __init memblock_init(void)
/* Create a dummy zero size MEMBLOCK which will get coalesced away later.
* This simplifies the memblock_add() code below...
*/
- memblock.memory.region[0].base = 0;
- memblock.memory.region[0].size = 0;
+ memblock.memory.regions[0].base = 0;
+ memblock.memory.regions[0].size = 0;
memblock.memory.cnt = 1;
/* Ditto. */
- memblock.reserved.region[0].base = 0;
- memblock.reserved.region[0].size = 0;
+ memblock.reserved.regions[0].base = 0;
+ memblock.reserved.regions[0].size = 0;
memblock.reserved.cnt = 1;
+
+ memblock.current_limit = MEMBLOCK_ALLOC_ANYWHERE;
}
void __init memblock_analyze(void)
{
int i;
- memblock.memory.size = 0;
+ memblock.memory_size = 0;
for (i = 0; i < memblock.memory.cnt; i++)
- memblock.memory.size += memblock.memory.region[i].size;
+ memblock.memory_size += memblock.memory.regions[i].size;
}
-static long memblock_add_region(struct memblock_region *rgn, u64 base, u64 size)
+static long memblock_add_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
unsigned long coalesced = 0;
long adjacent, i;
- if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
- rgn->region[0].base = base;
- rgn->region[0].size = size;
+ if ((type->cnt == 1) && (type->regions[0].size == 0)) {
+ type->regions[0].base = base;
+ type->regions[0].size = size;
return 0;
}
/* First try and coalesce this MEMBLOCK with another. */
- for (i = 0; i < rgn->cnt; i++) {
- u64 rgnbase = rgn->region[i].base;
- u64 rgnsize = rgn->region[i].size;
+ for (i = 0; i < type->cnt; i++) {
+ phys_addr_t rgnbase = type->regions[i].base;
+ phys_addr_t rgnsize = type->regions[i].size;
if ((rgnbase == base) && (rgnsize == size))
/* Already have this region, so we're done */
adjacent = memblock_addrs_adjacent(base, size, rgnbase, rgnsize);
if (adjacent > 0) {
- rgn->region[i].base -= size;
- rgn->region[i].size += size;
+ type->regions[i].base -= size;
+ type->regions[i].size += size;
coalesced++;
break;
} else if (adjacent < 0) {
- rgn->region[i].size += size;
+ type->regions[i].size += size;
coalesced++;
break;
}
}
- if ((i < rgn->cnt - 1) && memblock_regions_adjacent(rgn, i, i+1)) {
- memblock_coalesce_regions(rgn, i, i+1);
+ if ((i < type->cnt - 1) && memblock_regions_adjacent(type, i, i+1)) {
+ memblock_coalesce_regions(type, i, i+1);
coalesced++;
}
if (coalesced)
return coalesced;
- if (rgn->cnt >= MAX_MEMBLOCK_REGIONS)
+ if (type->cnt >= MAX_MEMBLOCK_REGIONS)
return -1;
/* Couldn't coalesce the MEMBLOCK, 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;
+ for (i = type->cnt - 1; i >= 0; i--) {
+ if (base < type->regions[i].base) {
+ type->regions[i+1].base = type->regions[i].base;
+ type->regions[i+1].size = type->regions[i].size;
} else {
- rgn->region[i+1].base = base;
- rgn->region[i+1].size = size;
+ type->regions[i+1].base = base;
+ type->regions[i+1].size = size;
break;
}
}
- if (base < rgn->region[0].base) {
- rgn->region[0].base = base;
- rgn->region[0].size = size;
+ if (base < type->regions[0].base) {
+ type->regions[0].base = base;
+ type->regions[0].size = size;
}
- rgn->cnt++;
+ type->cnt++;
return 0;
}
-long memblock_add(u64 base, u64 size)
+long memblock_add(phys_addr_t base, phys_addr_t size)
{
- struct memblock_region *_rgn = &memblock.memory;
-
- /* On pSeries LPAR systems, the first MEMBLOCK is our RMO region. */
- if (base == 0)
- memblock.rmo_size = size;
-
- return memblock_add_region(_rgn, base, size);
+ return memblock_add_region(&memblock.memory, base, size);
}
-static long __memblock_remove(struct memblock_region *rgn, u64 base, u64 size)
+static long __memblock_remove(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
- u64 rgnbegin, rgnend;
- u64 end = base + size;
+ phys_addr_t rgnbegin, rgnend;
+ phys_addr_t 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;
+ for (i=0; i < type->cnt; i++) {
+ rgnbegin = type->regions[i].base;
+ rgnend = rgnbegin + type->regions[i].size;
if ((rgnbegin <= base) && (end <= rgnend))
break;
}
/* Didn't find the region */
- if (i == rgn->cnt)
+ if (i == type->cnt)
return -1;
/* Check to see if we are removing entire region */
if ((rgnbegin == base) && (rgnend == end)) {
- memblock_remove_region(rgn, i);
+ memblock_remove_region(type, 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;
+ type->regions[i].base = end;
+ type->regions[i].size -= size;
return 0;
}
/* Check to see if the region is matching at the end */
if (rgnend == end) {
- rgn->region[i].size -= size;
+ type->regions[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 memblock_add_region(rgn, end, rgnend - end);
+ type->regions[i].size = base - type->regions[i].base;
+ return memblock_add_region(type, end, rgnend - end);
}
-long memblock_remove(u64 base, u64 size)
+long memblock_remove(phys_addr_t base, phys_addr_t size)
{
return __memblock_remove(&memblock.memory, base, size);
}
-long __init memblock_free(u64 base, u64 size)
+long __init memblock_free(phys_addr_t base, phys_addr_t size)
{
return __memblock_remove(&memblock.reserved, base, size);
}
-long __init memblock_reserve(u64 base, u64 size)
+long __init memblock_reserve(phys_addr_t base, phys_addr_t size)
{
- struct memblock_region *_rgn = &memblock.reserved;
+ struct memblock_type *_rgn = &memblock.reserved;
BUG_ON(0 == size);
return memblock_add_region(_rgn, base, size);
}
-long memblock_overlaps_region(struct memblock_region *rgn, u64 base, u64 size)
+long memblock_overlaps_region(struct memblock_type *type, phys_addr_t base, phys_addr_t size)
{
unsigned long i;
- for (i = 0; i < rgn->cnt; i++) {
- u64 rgnbase = rgn->region[i].base;
- u64 rgnsize = rgn->region[i].size;
+ for (i = 0; i < type->cnt; i++) {
+ phys_addr_t rgnbase = type->regions[i].base;
+ phys_addr_t rgnsize = type->regions[i].size;
if (memblock_addrs_overlap(base, size, rgnbase, rgnsize))
break;
}
- return (i < rgn->cnt) ? i : -1;
+ return (i < type->cnt) ? i : -1;
}
-static u64 memblock_align_down(u64 addr, u64 size)
+static phys_addr_t memblock_align_down(phys_addr_t addr, phys_addr_t size)
{
return addr & ~(size - 1);
}
-static u64 memblock_align_up(u64 addr, u64 size)
+static phys_addr_t memblock_align_up(phys_addr_t addr, phys_addr_t size)
{
return (addr + (size - 1)) & ~(size - 1);
}
-static u64 __init memblock_alloc_nid_unreserved(u64 start, u64 end,
- u64 size, u64 align)
+static phys_addr_t __init memblock_alloc_region(phys_addr_t start, phys_addr_t end,
+ phys_addr_t size, phys_addr_t align)
{
- u64 base, res_base;
+ phys_addr_t base, res_base;
long j;
base = memblock_align_down((end - size), align);
if (j < 0) {
/* this area isn't reserved, take it */
if (memblock_add_region(&memblock.reserved, base, size) < 0)
- base = ~(u64)0;
+ base = ~(phys_addr_t)0;
return base;
}
- res_base = memblock.reserved.region[j].base;
+ res_base = memblock.reserved.regions[j].base;
if (res_base < size)
break;
base = memblock_align_down(res_base - size, align);
}
- return ~(u64)0;
+ return ~(phys_addr_t)0;
+}
+
+phys_addr_t __weak __init memblock_nid_range(phys_addr_t start, phys_addr_t end, int *nid)
+{
+ *nid = 0;
+
+ return end;
}
-static u64 __init memblock_alloc_nid_region(struct memblock_property *mp,
- u64 (*nid_range)(u64, u64, int *),
- u64 size, u64 align, int nid)
+static phys_addr_t __init memblock_alloc_nid_region(struct memblock_region *mp,
+ phys_addr_t size,
+ phys_addr_t align, int nid)
{
- u64 start, end;
+ phys_addr_t start, end;
start = mp->base;
end = start + mp->size;
start = memblock_align_up(start, align);
while (start < end) {
- u64 this_end;
+ phys_addr_t this_end;
int this_nid;
- this_end = nid_range(start, end, &this_nid);
+ this_end = memblock_nid_range(start, end, &this_nid);
if (this_nid == nid) {
- u64 ret = memblock_alloc_nid_unreserved(start, this_end,
- size, align);
- if (ret != ~(u64)0)
+ phys_addr_t ret = memblock_alloc_region(start, this_end, size, align);
+ if (ret != ~(phys_addr_t)0)
return ret;
}
start = this_end;
}
- return ~(u64)0;
+ return ~(phys_addr_t)0;
}
-u64 __init memblock_alloc_nid(u64 size, u64 align, int nid,
- u64 (*nid_range)(u64 start, u64 end, int *nid))
+phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
{
- struct memblock_region *mem = &memblock.memory;
+ struct memblock_type *mem = &memblock.memory;
int i;
BUG_ON(0 == size);
+ /* We do a bottom-up search for a region with the right
+ * nid since that's easier considering how memblock_nid_range()
+ * works
+ */
size = memblock_align_up(size, align);
for (i = 0; i < mem->cnt; i++) {
- u64 ret = memblock_alloc_nid_region(&mem->region[i],
- nid_range,
+ phys_addr_t ret = memblock_alloc_nid_region(&mem->regions[i],
size, align, nid);
- if (ret != ~(u64)0)
+ if (ret != ~(phys_addr_t)0)
return ret;
}
return memblock_alloc(size, align);
}
-u64 __init memblock_alloc(u64 size, u64 align)
+phys_addr_t __init memblock_alloc(phys_addr_t size, phys_addr_t align)
{
- return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ANYWHERE);
+ return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
}
-u64 __init memblock_alloc_base(u64 size, u64 align, u64 max_addr)
+phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
{
- u64 alloc;
+ phys_addr_t alloc;
alloc = __memblock_alloc_base(size, align, max_addr);
return alloc;
}
-u64 __init __memblock_alloc_base(u64 size, u64 align, u64 max_addr)
+phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys_addr_t max_addr)
{
- long i, j;
- u64 base = 0;
- u64 res_base;
+ long i;
+ phys_addr_t base = 0;
+ phys_addr_t res_base;
BUG_ON(0 == size);
size = memblock_align_up(size, align);
- /* On some platforms, make sure we allocate lowmem */
- /* Note that MEMBLOCK_REAL_LIMIT may be MEMBLOCK_ALLOC_ANYWHERE */
- if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
- max_addr = MEMBLOCK_REAL_LIMIT;
+ /* Pump up max_addr */
+ if (max_addr == MEMBLOCK_ALLOC_ACCESSIBLE)
+ max_addr = memblock.current_limit;
+ /* We do a top-down search, this tends to limit memory
+ * fragmentation by keeping early boot allocs near the
+ * top of memory
+ */
for (i = memblock.memory.cnt - 1; i >= 0; i--) {
- u64 memblockbase = memblock.memory.region[i].base;
- u64 memblocksize = memblock.memory.region[i].size;
+ phys_addr_t memblockbase = memblock.memory.regions[i].base;
+ phys_addr_t memblocksize = memblock.memory.regions[i].size;
if (memblocksize < size)
continue;
- if (max_addr == MEMBLOCK_ALLOC_ANYWHERE)
- base = memblock_align_down(memblockbase + memblocksize - size, align);
- else if (memblockbase < max_addr) {
- base = min(memblockbase + memblocksize, max_addr);
- base = memblock_align_down(base - size, align);
- } else
- continue;
-
- while (base && memblockbase <= base) {
- j = memblock_overlaps_region(&memblock.reserved, base, size);
- if (j < 0) {
- /* this area isn't reserved, take it */
- if (memblock_add_region(&memblock.reserved, base, size) < 0)
- return 0;
- return base;
- }
- res_base = memblock.reserved.region[j].base;
- if (res_base < size)
- break;
- base = memblock_align_down(res_base - size, align);
- }
+ base = min(memblockbase + memblocksize, max_addr);
+ res_base = memblock_alloc_region(memblockbase, base, size, align);
+ if (res_base != ~(phys_addr_t)0)
+ return res_base;
}
return 0;
}
/* You must call memblock_analyze() before this. */
-u64 __init memblock_phys_mem_size(void)
+phys_addr_t __init memblock_phys_mem_size(void)
{
- return memblock.memory.size;
+ return memblock.memory_size;
}
-u64 memblock_end_of_DRAM(void)
+phys_addr_t memblock_end_of_DRAM(void)
{
int idx = memblock.memory.cnt - 1;
- return (memblock.memory.region[idx].base + memblock.memory.region[idx].size);
+ return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size);
}
/* You must call memblock_analyze() after this. */
-void __init memblock_enforce_memory_limit(u64 memory_limit)
+void __init memblock_enforce_memory_limit(phys_addr_t memory_limit)
{
unsigned long i;
- u64 limit;
- struct memblock_property *p;
+ phys_addr_t limit;
+ struct memblock_region *p;
if (!memory_limit)
return;
/* Truncate the memblock regions to satisfy the memory limit. */
limit = memory_limit;
for (i = 0; i < memblock.memory.cnt; i++) {
- if (limit > memblock.memory.region[i].size) {
- limit -= memblock.memory.region[i].size;
+ if (limit > memblock.memory.regions[i].size) {
+ limit -= memblock.memory.regions[i].size;
continue;
}
- memblock.memory.region[i].size = limit;
+ memblock.memory.regions[i].size = limit;
memblock.memory.cnt = i + 1;
break;
}
- if (memblock.memory.region[0].size < memblock.rmo_size)
- memblock.rmo_size = memblock.memory.region[0].size;
-
memory_limit = memblock_end_of_DRAM();
/* And truncate any reserves above the limit also. */
for (i = 0; i < memblock.reserved.cnt; i++) {
- p = &memblock.reserved.region[i];
+ p = &memblock.reserved.regions[i];
if (p->base > memory_limit)
p->size = 0;
}
}
-int __init memblock_is_reserved(u64 addr)
+static int memblock_search(struct memblock_type *type, phys_addr_t addr)
{
- int i;
+ unsigned int left = 0, right = type->cnt;
+
+ do {
+ unsigned int mid = (right + left) / 2;
+
+ if (addr < type->regions[mid].base)
+ right = mid;
+ else if (addr >= (type->regions[mid].base +
+ type->regions[mid].size))
+ left = mid + 1;
+ else
+ return mid;
+ } while (left < right);
+ return -1;
+}
- for (i = 0; i < memblock.reserved.cnt; i++) {
- u64 upper = memblock.reserved.region[i].base +
- memblock.reserved.region[i].size - 1;
- if ((addr >= memblock.reserved.region[i].base) && (addr <= upper))
- return 1;
- }
- return 0;
+int __init memblock_is_reserved(phys_addr_t addr)
+{
+ return memblock_search(&memblock.reserved, addr) != -1;
}
-int memblock_is_region_reserved(u64 base, u64 size)
+int memblock_is_memory(phys_addr_t addr)
{
- return memblock_overlaps_region(&memblock.reserved, base, size);
+ return memblock_search(&memblock.memory, addr) != -1;
}
-/*
- * Given a <base, len>, find which memory regions belong to this range.
- * Adjust the request and return a contiguous chunk.
- */
-int memblock_find(struct memblock_property *res)
+int memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
{
- int i;
- u64 rstart, rend;
+ int idx = memblock_search(&memblock.reserved, base);
- rstart = res->base;
- rend = rstart + res->size - 1;
+ if (idx == -1)
+ return 0;
+ return memblock.reserved.regions[idx].base <= base &&
+ (memblock.reserved.regions[idx].base +
+ memblock.reserved.regions[idx].size) >= (base + size);
+}
- for (i = 0; i < memblock.memory.cnt; i++) {
- u64 start = memblock.memory.region[i].base;
- u64 end = start + memblock.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;
+int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size)
+{
+ return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
}
+
+
+void __init memblock_set_current_limit(phys_addr_t limit)
+{
+ memblock.current_limit = limit;
+}
+
git.openpandora.org / pandora-kernel.git / blobdiff