diff options
| -rw-r--r-- | arch/arm/include/asm/memory.h | 17 | ||||
| -rw-r--r-- | arch/arm/include/asm/page.h | 4 | ||||
| -rw-r--r-- | arch/arm/mm/init.c | 32 |
3 files changed, 36 insertions, 17 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 85763db87449..b3b54c6216a4 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -212,7 +212,6 @@ static inline __deprecated void *bus_to_virt(unsigned long x) * * page_to_pfn(page) convert a struct page * to a PFN number * pfn_to_page(pfn) convert a _valid_ PFN number to struct page * - * pfn_valid(pfn) indicates whether a PFN number is valid * * virt_to_page(k) convert a _valid_ virtual address to struct page * * virt_addr_valid(k) indicates whether a virtual address is valid @@ -221,10 +220,6 @@ static inline __deprecated void *bus_to_virt(unsigned long x) #define ARCH_PFN_OFFSET PHYS_PFN_OFFSET -#ifndef CONFIG_SPARSEMEM -#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) -#endif - #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) #define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) @@ -241,18 +236,6 @@ static inline __deprecated void *bus_to_virt(unsigned long x) #define arch_pfn_to_nid(pfn) PFN_TO_NID(pfn) #define arch_local_page_offset(pfn, nid) LOCAL_MAP_NR((pfn) << PAGE_SHIFT) -#define pfn_valid(pfn) \ - ({ \ - unsigned int nid = PFN_TO_NID(pfn); \ - int valid = nid < MAX_NUMNODES; \ - if (valid) { \ - pg_data_t *node = NODE_DATA(nid); \ - valid = (pfn - node->node_start_pfn) < \ - node->node_spanned_pages; \ - } \ - valid; \ - }) - #define virt_to_page(kaddr) \ (ADDR_TO_MAPBASE(kaddr) + LOCAL_MAP_NR(kaddr)) diff --git a/arch/arm/include/asm/page.h b/arch/arm/include/asm/page.h index 9c746af1bf6e..3a32af4cce30 100644 --- a/arch/arm/include/asm/page.h +++ b/arch/arm/include/asm/page.h @@ -194,6 +194,10 @@ typedef unsigned long pgprot_t; typedef struct page *pgtable_t; +#ifndef CONFIG_SPARSEMEM +extern int pfn_valid(unsigned long); +#endif + #include <asm/memory.h> #endif /* !__ASSEMBLY__ */ diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 3a7279c1ce5e..ea36186f32c3 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -15,6 +15,7 @@ #include <linux/mman.h> #include <linux/nodemask.h> #include <linux/initrd.h> +#include <linux/sort.h> #include <linux/highmem.h> #include <asm/mach-types.h> @@ -349,12 +350,43 @@ static void __init bootmem_free_node(int node, struct meminfo *mi) free_area_init_node(node, zone_size, min, zhole_size); } +#ifndef CONFIG_SPARSEMEM +int pfn_valid(unsigned long pfn) +{ + struct meminfo *mi = &meminfo; + unsigned int left = 0, right = mi->nr_banks; + + do { + unsigned int mid = (right + left) / 2; + struct membank *bank = &mi->bank[mid]; + + if (pfn < bank_pfn_start(bank)) + right = mid; + else if (pfn >= bank_pfn_end(bank)) + left = mid + 1; + else + return 1; + } while (left < right); + return 0; +} +EXPORT_SYMBOL(pfn_valid); +#endif + +static int __init meminfo_cmp(const void *_a, const void *_b) +{ + 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; +} + void __init bootmem_init(void) { struct meminfo *mi = &meminfo; unsigned long min, max_low, max_high; int node, initrd_node; + sort(&mi->bank, mi->nr_banks, sizeof(mi->bank[0]), meminfo_cmp, NULL); + /* * Locate which node contains the ramdisk image, if any. */ |