X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fbootmem.c;h=00a96970b237efe9a62c8c6cd8859ef625868bc1;hb=85f4544fbf02f60993c76f5b92517a87f220472d;hp=d213feded10df30d04fedd2e744fc89ab3f6f934;hpb=a748422ee45725e04e1d3792fa19dfa90ddfd116;p=pandora-kernel.git diff --git a/mm/bootmem.c b/mm/bootmem.c index d213feded10d..00a96970b237 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -8,17 +8,15 @@ * free memory collector. It's used to deal with reserved * system memory and memory holes as well. */ - -#include -#include -#include -#include #include +#include #include -#include #include -#include + +#include #include +#include + #include "internal.h" /* @@ -29,10 +27,6 @@ unsigned long max_low_pfn; unsigned long min_low_pfn; unsigned long max_pfn; -EXPORT_SYMBOL(max_pfn); /* This is exported so - * dma_get_required_mask(), which uses - * it, can be an inline function */ - static LIST_HEAD(bdata_list); #ifdef CONFIG_CRASH_DUMP /* @@ -43,7 +37,7 @@ unsigned long saved_max_pfn; #endif /* return the number of _pages_ that will be allocated for the boot bitmap */ -unsigned long __init bootmem_bootmap_pages (unsigned long pages) +unsigned long __init bootmem_bootmap_pages(unsigned long pages) { unsigned long mapsize; @@ -53,12 +47,14 @@ unsigned long __init bootmem_bootmap_pages (unsigned long pages) return mapsize; } + /* * link bdata in order */ -static void link_bootmem(bootmem_data_t *bdata) +static void __init link_bootmem(bootmem_data_t *bdata) { bootmem_data_t *ent; + if (list_empty(&bdata_list)) { list_add(&bdata->list, &bdata_list); return; @@ -71,22 +67,32 @@ static void link_bootmem(bootmem_data_t *bdata) } } list_add_tail(&bdata->list, &bdata_list); - return; } +/* + * Given an initialised bdata, it returns the size of the boot bitmap + */ +static unsigned long __init get_mapsize(bootmem_data_t *bdata) +{ + unsigned long mapsize; + unsigned long start = PFN_DOWN(bdata->node_boot_start); + unsigned long end = bdata->node_low_pfn; + + mapsize = ((end - start) + 7) / 8; + return ALIGN(mapsize, sizeof(long)); +} /* * Called once to set up the allocator itself. */ -static unsigned long __init init_bootmem_core (pg_data_t *pgdat, +static unsigned long __init init_bootmem_core(pg_data_t *pgdat, unsigned long mapstart, unsigned long start, unsigned long end) { bootmem_data_t *bdata = pgdat->bdata; - unsigned long mapsize = ((end - start)+7)/8; + unsigned long mapsize; - mapsize = ALIGN(mapsize, sizeof(long)); - bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT); - bdata->node_boot_start = (start << PAGE_SHIFT); + bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); + bdata->node_boot_start = PFN_PHYS(start); bdata->node_low_pfn = end; link_bootmem(bdata); @@ -94,6 +100,7 @@ static unsigned long __init init_bootmem_core (pg_data_t *pgdat, * Initially all pages are reserved - setup_arch() has to * register free RAM areas explicitly. */ + mapsize = get_mapsize(bdata); memset(bdata->node_bootmem_map, 0xff, mapsize); return mapsize; @@ -104,22 +111,22 @@ static unsigned long __init init_bootmem_core (pg_data_t *pgdat, * might be used for boot-time allocations - or it might get added * to the free page pool later on. */ -static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size) +static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr, + unsigned long size) { + unsigned long sidx, eidx; unsigned long i; + /* * round up, partially reserved pages are considered * fully reserved. */ - unsigned long sidx = (addr - bdata->node_boot_start)/PAGE_SIZE; - unsigned long eidx = (addr + size - bdata->node_boot_start + - PAGE_SIZE-1)/PAGE_SIZE; - unsigned long end = (addr + size + PAGE_SIZE-1)/PAGE_SIZE; - BUG_ON(!size); - BUG_ON(sidx >= eidx); - BUG_ON((addr >> PAGE_SHIFT) >= bdata->node_low_pfn); - BUG_ON(end > bdata->node_low_pfn); + BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn); + BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn); + + sidx = PFN_DOWN(addr - bdata->node_boot_start); + eidx = PFN_UP(addr + size - bdata->node_boot_start); for (i = sidx; i < eidx; i++) if (test_and_set_bit(i, bdata->node_bootmem_map)) { @@ -129,20 +136,18 @@ static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long add } } -static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size) +static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, + unsigned long size) { + unsigned long sidx, eidx; unsigned long i; - unsigned long start; + /* * round down end of usable mem, partially free pages are * considered reserved. */ - unsigned long sidx; - unsigned long eidx = (addr + size - bdata->node_boot_start)/PAGE_SIZE; - unsigned long end = (addr + size)/PAGE_SIZE; - BUG_ON(!size); - BUG_ON(end > bdata->node_low_pfn); + BUG_ON(PFN_DOWN(addr + size) > bdata->node_low_pfn); if (addr < bdata->last_success) bdata->last_success = addr; @@ -150,8 +155,8 @@ static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, /* * Round up the beginning of the address. */ - start = (addr + PAGE_SIZE-1) / PAGE_SIZE; - sidx = start - (bdata->node_boot_start/PAGE_SIZE); + sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start); + eidx = PFN_DOWN(addr + size - bdata->node_boot_start); for (i = sidx; i < eidx; i++) { if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map))) @@ -177,10 +182,10 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit) { unsigned long offset, remaining_size, areasize, preferred; - unsigned long i, start = 0, incr, eidx, end_pfn = bdata->node_low_pfn; + unsigned long i, start = 0, incr, eidx, end_pfn; void *ret; - if(!size) { + if (!size) { printk("__alloc_bootmem_core(): zero-sized request\n"); BUG(); } @@ -189,23 +194,26 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, if (limit && bdata->node_boot_start >= limit) return NULL; - limit >>=PAGE_SHIFT; + /* on nodes without memory - bootmem_map is NULL */ + if (!bdata->node_bootmem_map) + return NULL; + + end_pfn = bdata->node_low_pfn; + limit = PFN_DOWN(limit); if (limit && end_pfn > limit) end_pfn = limit; - eidx = end_pfn - (bdata->node_boot_start >> PAGE_SHIFT); + eidx = end_pfn - PFN_DOWN(bdata->node_boot_start); offset = 0; - if (align && - (bdata->node_boot_start & (align - 1UL)) != 0) - offset = (align - (bdata->node_boot_start & (align - 1UL))); - offset >>= PAGE_SHIFT; + if (align && (bdata->node_boot_start & (align - 1UL)) != 0) + offset = align - (bdata->node_boot_start & (align - 1UL)); + offset = PFN_DOWN(offset); /* * We try to allocate bootmem pages above 'goal' * first, then we try to allocate lower pages. */ - if (goal && (goal >= bdata->node_boot_start) && - ((goal >> PAGE_SHIFT) < end_pfn)) { + if (goal && goal >= bdata->node_boot_start && PFN_DOWN(goal) < end_pfn) { preferred = goal - bdata->node_boot_start; if (bdata->last_success >= preferred) @@ -214,9 +222,8 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, } else preferred = 0; - preferred = ALIGN(preferred, align) >> PAGE_SHIFT; - preferred += offset; - areasize = (size+PAGE_SIZE-1)/PAGE_SIZE; + preferred = PFN_DOWN(ALIGN(preferred, align)) + offset; + areasize = (size + PAGE_SIZE-1) / PAGE_SIZE; incr = align >> PAGE_SHIFT ? : 1; restart_scan: @@ -231,7 +238,7 @@ restart_scan: for (j = i + 1; j < i + areasize; ++j) { if (j >= eidx) goto fail_block; - if (test_bit (j, bdata->node_bootmem_map)) + if (test_bit(j, bdata->node_bootmem_map)) goto fail_block; } start = i; @@ -247,7 +254,7 @@ restart_scan: return NULL; found: - bdata->last_success = start << PAGE_SHIFT; + bdata->last_success = PFN_PHYS(start); BUG_ON(start >= eidx); /* @@ -259,19 +266,21 @@ found: bdata->last_offset && bdata->last_pos+1 == start) { offset = ALIGN(bdata->last_offset, align); BUG_ON(offset > PAGE_SIZE); - remaining_size = PAGE_SIZE-offset; + remaining_size = PAGE_SIZE - offset; if (size < remaining_size) { areasize = 0; /* last_pos unchanged */ - bdata->last_offset = offset+size; - ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset + - bdata->node_boot_start); + bdata->last_offset = offset + size; + ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + + offset + + bdata->node_boot_start); } else { remaining_size = size - remaining_size; - areasize = (remaining_size+PAGE_SIZE-1)/PAGE_SIZE; - ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset + - bdata->node_boot_start); - bdata->last_pos = start+areasize-1; + areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE; + ret = phys_to_virt(bdata->last_pos * PAGE_SIZE + + offset + + bdata->node_boot_start); + bdata->last_pos = start + areasize - 1; bdata->last_offset = remaining_size; } bdata->last_offset &= ~PAGE_MASK; @@ -284,7 +293,7 @@ found: /* * Reserve the area now: */ - for (i = start; i < start+areasize; i++) + for (i = start; i < start + areasize; i++) if (unlikely(test_and_set_bit(i, bdata->node_bootmem_map))) BUG(); memset(ret, 0, size); @@ -305,8 +314,8 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat) count = 0; /* first extant page of the node */ - pfn = bdata->node_boot_start >> PAGE_SHIFT; - idx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT); + pfn = PFN_DOWN(bdata->node_boot_start); + idx = bdata->node_low_pfn - pfn; map = bdata->node_bootmem_map; /* Check physaddr is O(LOG2(BITS_PER_LONG)) page aligned */ if (bdata->node_boot_start == 0 || @@ -335,7 +344,7 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat) } } } else { - i+=BITS_PER_LONG; + i += BITS_PER_LONG; } pfn += BITS_PER_LONG; } @@ -347,9 +356,10 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat) */ page = virt_to_page(bdata->node_bootmem_map); count = 0; - for (i = 0; i < ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE; i++,page++) { - count++; + idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT; + for (i = 0; i < idx; i++, page++) { __free_pages_bootmem(page, 0); + count++; } total += count; bdata->node_bootmem_map = NULL; @@ -357,64 +367,72 @@ static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat) return total; } -unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn) +unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn, + unsigned long startpfn, unsigned long endpfn) { - return(init_bootmem_core(pgdat, freepfn, startpfn, endpfn)); + return init_bootmem_core(pgdat, freepfn, startpfn, endpfn); } -void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size) +void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, + unsigned long size) { reserve_bootmem_core(pgdat->bdata, physaddr, size); } -void __init free_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size) +void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr, + unsigned long size) { free_bootmem_core(pgdat->bdata, physaddr, size); } -unsigned long __init free_all_bootmem_node (pg_data_t *pgdat) +unsigned long __init free_all_bootmem_node(pg_data_t *pgdat) { - return(free_all_bootmem_core(pgdat)); + return free_all_bootmem_core(pgdat); } -unsigned long __init init_bootmem (unsigned long start, unsigned long pages) +unsigned long __init init_bootmem(unsigned long start, unsigned long pages) { max_low_pfn = pages; min_low_pfn = start; - return(init_bootmem_core(NODE_DATA(0), start, 0, pages)); + return init_bootmem_core(NODE_DATA(0), start, 0, pages); } #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE -void __init reserve_bootmem (unsigned long addr, unsigned long size) +void __init reserve_bootmem(unsigned long addr, unsigned long size) { reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size); } #endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */ -void __init free_bootmem (unsigned long addr, unsigned long size) +void __init free_bootmem(unsigned long addr, unsigned long size) { free_bootmem_core(NODE_DATA(0)->bdata, addr, size); } -unsigned long __init free_all_bootmem (void) +unsigned long __init free_all_bootmem(void) { - return(free_all_bootmem_core(NODE_DATA(0))); + return free_all_bootmem_core(NODE_DATA(0)); } -void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal) +void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, + unsigned long goal) { bootmem_data_t *bdata; void *ptr; - list_for_each_entry(bdata, &bdata_list, list) - if ((ptr = __alloc_bootmem_core(bdata, size, align, goal, 0))) - return(ptr); + list_for_each_entry(bdata, &bdata_list, list) { + ptr = __alloc_bootmem_core(bdata, size, align, goal, 0); + if (ptr) + return ptr; + } return NULL; } -void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal) +void * __init __alloc_bootmem(unsigned long size, unsigned long align, + unsigned long goal) { void *mem = __alloc_bootmem_nopanic(size,align,goal); + if (mem) return mem; /* @@ -426,29 +444,34 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned } -void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, unsigned long align, - unsigned long goal) +void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, + unsigned long align, unsigned long goal) { void *ptr; ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal, 0); if (ptr) - return (ptr); + return ptr; return __alloc_bootmem(size, align, goal); } -#define LOW32LIMIT 0xffffffff +#ifndef ARCH_LOW_ADDRESS_LIMIT +#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL +#endif -void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal) +void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, + unsigned long goal) { bootmem_data_t *bdata; void *ptr; - list_for_each_entry(bdata, &bdata_list, list) - if ((ptr = __alloc_bootmem_core(bdata, size, - align, goal, LOW32LIMIT))) - return(ptr); + list_for_each_entry(bdata, &bdata_list, list) { + ptr = __alloc_bootmem_core(bdata, size, align, goal, + ARCH_LOW_ADDRESS_LIMIT); + if (ptr) + return ptr; + } /* * Whoops, we cannot satisfy the allocation request. @@ -461,5 +484,6 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsig void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal) { - return __alloc_bootmem_core(pgdat->bdata, size, align, goal, LOW32LIMIT); + return __alloc_bootmem_core(pgdat->bdata, size, align, goal, + ARCH_LOW_ADDRESS_LIMIT); }