#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/bitops.h>
+#include <linux/poison.h>
#include <linux/memblock.h>
-#define MEMBLOCK_ALLOC_ANYWHERE 0
-
struct memblock memblock;
static int memblock_debug;
+static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS + 1];
+static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS + 1];
+
+#define MEMBLOCK_ERROR (~(phys_addr_t)0)
static int __init early_memblock(char *p)
{
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;
}
static long memblock_regions_adjacent(struct memblock_type *type,
- unsigned long r1, unsigned long r2)
+ unsigned long r1, unsigned long r2)
{
- u64 base1 = type->regions[r1].base;
- u64 size1 = type->regions[r1].size;
- u64 base2 = type->regions[r2].base;
- u64 size2 = type->regions[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);
}
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.regions[0].base = 0;
- memblock.memory.regions[0].size = 0;
- memblock.memory.cnt = 1;
-
- /* Ditto. */
- memblock.reserved.regions[0].base = 0;
- memblock.reserved.regions[0].size = 0;
- memblock.reserved.cnt = 1;
-}
-
void __init memblock_analyze(void)
{
int i;
- memblock.memory.size = 0;
+ /* Check marker in the unused last array entry */
+ WARN_ON(memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS].base
+ != (phys_addr_t)RED_INACTIVE);
+ WARN_ON(memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS].base
+ != (phys_addr_t)RED_INACTIVE);
+
+ memblock.memory_size = 0;
for (i = 0; i < memblock.memory.cnt; i++)
- memblock.memory.size += memblock.memory.regions[i].size;
+ memblock.memory_size += memblock.memory.regions[i].size;
}
-static long memblock_add_region(struct memblock_type *type, 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;
/* First try and coalesce this MEMBLOCK with another. */
for (i = 0; i < type->cnt; i++) {
- u64 rgnbase = type->regions[i].base;
- u64 rgnsize = type->regions[i].size;
+ 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 */
if (coalesced)
return coalesced;
- if (type->cnt >= MAX_MEMBLOCK_REGIONS)
+ if (type->cnt >= type->max)
return -1;
/* Couldn't coalesce the MEMBLOCK, so add it to the sorted table. */
return 0;
}
-long memblock_add(u64 base, u64 size)
+long memblock_add(phys_addr_t base, phys_addr_t size)
{
- /* On pSeries LPAR systems, the first MEMBLOCK is our RMO region. */
- if (base == 0)
- memblock.rmo_size = size;
-
return memblock_add_region(&memblock.memory, base, size);
}
-static long __memblock_remove(struct memblock_type *type, 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 */
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_type *_rgn = &memblock.reserved;
return memblock_add_region(_rgn, base, size);
}
-long memblock_overlaps_region(struct memblock_type *type, 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 < type->cnt; i++) {
- u64 rgnbase = type->regions[i].base;
- u64 rgnsize = type->regions[i].size;
+ 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 < 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_region(u64 start, u64 end,
- u64 size, u64 align)
+static phys_addr_t __init memblock_find_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);
while (start <= 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)
- base = ~(u64)0;
+ if (j < 0)
return 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 MEMBLOCK_ERROR;
}
-u64 __weak __init memblock_nid_range(u64 start, u64 end, int *nid)
+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_region *mp,
- 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 = memblock_nid_range(start, end, &this_nid);
if (this_nid == nid) {
- u64 ret = memblock_alloc_region(start, this_end, size, align);
- if (ret != ~(u64)0)
+ phys_addr_t ret = memblock_find_region(start, this_end, size, align);
+ if (ret != MEMBLOCK_ERROR &&
+ memblock_add_region(&memblock.reserved, ret, size) >= 0)
return ret;
}
start = this_end;
}
- return ~(u64)0;
+ return MEMBLOCK_ERROR;
}
-u64 __init memblock_alloc_nid(u64 size, u64 align, int nid)
+phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
{
struct memblock_type *mem = &memblock.memory;
int i;
size = memblock_align_up(size, align);
for (i = 0; i < mem->cnt; i++) {
- u64 ret = memblock_alloc_nid_region(&mem->regions[i],
+ phys_addr_t ret = memblock_alloc_nid_region(&mem->regions[i],
size, align, nid);
- if (ret != ~(u64)0)
+ if (ret != MEMBLOCK_ERROR)
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;
- u64 base = 0;
- u64 res_base;
+ 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_ANYWHERE)
- max_addr = ~(u64)0;
+ 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.regions[i].base;
- u64 memblocksize = memblock.memory.regions[i].size;
+ phys_addr_t memblockbase = memblock.memory.regions[i].base;
+ phys_addr_t memblocksize = memblock.memory.regions[i].size;
if (memblocksize < size)
continue;
base = min(memblockbase + memblocksize, max_addr);
- res_base = memblock_alloc_region(memblockbase, base, size, align);
- if (res_base != ~(u64)0)
+ res_base = memblock_find_region(memblockbase, base, size, align);
+ if (res_base != MEMBLOCK_ERROR &&
+ memblock_add_region(&memblock.reserved, res_base, size) >= 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;
}
/* 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;
+ phys_addr_t limit;
struct memblock_region *p;
if (!memory_limit)
break;
}
- if (memblock.memory.regions[0].size < memblock.rmo_size)
- memblock.rmo_size = memblock.memory.regions[0].size;
-
memory_limit = memblock_end_of_DRAM();
/* And truncate any reserves above the limit also. */
}
}
-static int memblock_search(struct memblock_type *type, u64 addr)
+static int memblock_search(struct memblock_type *type, phys_addr_t addr)
{
unsigned int left = 0, right = type->cnt;
return -1;
}
-int __init memblock_is_reserved(u64 addr)
+int __init memblock_is_reserved(phys_addr_t addr)
{
return memblock_search(&memblock.reserved, addr) != -1;
}
-int memblock_is_memory(u64 addr)
+int memblock_is_memory(phys_addr_t addr)
{
return memblock_search(&memblock.memory, addr) != -1;
}
-int memblock_is_region_memory(u64 base, u64 size)
+int memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
{
int idx = memblock_search(&memblock.reserved, base);
memblock.reserved.regions[idx].size) >= (base + size);
}
-int memblock_is_region_reserved(u64 base, u64 size)
+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;
+}
+
+void __init memblock_init(void)
+{
+ /* Hookup the initial arrays */
+ memblock.memory.regions = memblock_memory_init_regions;
+ memblock.memory.max = INIT_MEMBLOCK_REGIONS;
+ memblock.reserved.regions = memblock_reserved_init_regions;
+ memblock.reserved.max = INIT_MEMBLOCK_REGIONS;
+
+ /* Write a marker in the unused last array entry */
+ memblock.memory.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE;
+ memblock.reserved.regions[INIT_MEMBLOCK_REGIONS].base = (phys_addr_t)RED_INACTIVE;
+
+ /* Create a dummy zero size MEMBLOCK which will get coalesced away later.
+ * This simplifies the memblock_add() code below...
+ */
+ memblock.memory.regions[0].base = 0;
+ memblock.memory.regions[0].size = 0;
+ memblock.memory.cnt = 1;
+
+ /* Ditto. */
+ memblock.reserved.regions[0].base = 0;
+ memblock.reserved.regions[0].size = 0;
+ memblock.reserved.cnt = 1;
+
+ memblock.current_limit = MEMBLOCK_ALLOC_ANYWHERE;
+}
+
projects / deliverable / linux.git / blobdiff