diff options
Diffstat (limited to 'arch/arm/mm/init.c')
| -rw-r--r-- | arch/arm/mm/init.c | 51 |
1 files changed, 22 insertions, 29 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 7c38474e533a..6ec1226fc62d 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -20,9 +20,9 @@ #include <linux/highmem.h> #include <linux/gfp.h> #include <linux/memblock.h> -#include <linux/sort.h> #include <asm/mach-types.h> +#include <asm/memblock.h> #include <asm/prom.h> #include <asm/sections.h> #include <asm/setup.h> @@ -135,30 +135,18 @@ void show_mem(unsigned int filter) } static void __init find_limits(unsigned long *min, unsigned long *max_low, - unsigned long *max_high) + unsigned long *max_high) { struct meminfo *mi = &meminfo; int i; - *min = -1UL; - *max_low = *max_high = 0; - - for_each_bank (i, mi) { - struct membank *bank = &mi->bank[i]; - unsigned long start, end; - - start = bank_pfn_start(bank); - end = bank_pfn_end(bank); - - if (*min > start) - *min = start; - if (*max_high < end) - *max_high = end; - if (bank->highmem) - continue; - if (*max_low < end) - *max_low = end; - } + /* This assumes the meminfo array is properly sorted */ + *min = bank_pfn_start(&mi->bank[0]); + for_each_bank (i, mi) + if (mi->bank[i].highmem) + break; + *max_low = bank_pfn_end(&mi->bank[i - 1]); + *max_high = bank_pfn_end(&mi->bank[mi->nr_banks - 1]); } static void __init arm_bootmem_init(unsigned long start_pfn, @@ -320,19 +308,25 @@ static void arm_memory_present(void) } #endif -static int __init meminfo_cmp(const void *_a, const void *_b) +static bool arm_memblock_steal_permitted = true; + +phys_addr_t arm_memblock_steal(phys_addr_t size, phys_addr_t align) { - const struct membank *a = _a, *b = _b; - long cmp = bank_pfn_start(a) - bank_pfn_start(b); - return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; + phys_addr_t phys; + + BUG_ON(!arm_memblock_steal_permitted); + + phys = memblock_alloc(size, align); + memblock_free(phys, size); + memblock_remove(phys, size); + + return phys; } void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) { int i; - sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL); - for (i = 0; i < mi->nr_banks; i++) memblock_add(mi->bank[i].start, mi->bank[i].size); @@ -371,6 +365,7 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc) if (mdesc->reserve) mdesc->reserve(); + arm_memblock_steal_permitted = false; memblock_allow_resize(); memblock_dump_all(); } @@ -403,8 +398,6 @@ void __init bootmem_init(void) */ arm_bootmem_free(min, max_low, max_high); - high_memory = __va(((phys_addr_t)max_low << PAGE_SHIFT) - 1) + 1; - /* * This doesn't seem to be used by the Linux memory manager any * more, but is used by ll_rw_block. If we can get rid of it, we |