diff options
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/setup.c | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 89440a0d852..f352cd9c834 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -271,8 +271,7 @@ static void __init bootmem_init(void) static void __init bootmem_init(void) { unsigned long reserved_end; - unsigned long highest = 0; - unsigned long mapstart = -1UL; + unsigned long mapstart = ~0UL; unsigned long bootmap_size; int i; @@ -284,6 +283,13 @@ static void __init bootmem_init(void) reserved_end = max(init_initrd(), PFN_UP(__pa_symbol(&_end))); /* + * max_low_pfn is not a number of pages. The number of pages + * of the system is given by 'max_low_pfn - min_low_pfn'. + */ + min_low_pfn = ~0UL; + max_low_pfn = 0; + + /* * Find the highest page frame number we have available. */ for (i = 0; i < boot_mem_map.nr_map; i++) { @@ -296,8 +302,10 @@ static void __init bootmem_init(void) end = PFN_DOWN(boot_mem_map.map[i].addr + boot_mem_map.map[i].size); - if (end > highest) - highest = end; + if (end > max_low_pfn) + max_low_pfn = end; + if (start < min_low_pfn) + min_low_pfn = start; if (end <= reserved_end) continue; if (start >= mapstart) @@ -305,22 +313,32 @@ static void __init bootmem_init(void) mapstart = max(reserved_end, start); } + if (min_low_pfn >= max_low_pfn) + panic("Incorrect memory mapping !!!"); + if (min_low_pfn > 0) { + printk(KERN_INFO + "Wasting %lu bytes for tracking %lu unused pages\n", + min_low_pfn * sizeof(struct page), + min_low_pfn); + min_low_pfn = 0; + } + /* * Determine low and high memory ranges */ - if (highest > PFN_DOWN(HIGHMEM_START)) { + if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { #ifdef CONFIG_HIGHMEM highstart_pfn = PFN_DOWN(HIGHMEM_START); - highend_pfn = highest; + highend_pfn = max_low_pfn; #endif - highest = PFN_DOWN(HIGHMEM_START); + max_low_pfn = PFN_DOWN(HIGHMEM_START); } /* * Initialize the boot-time allocator with low memory only. */ - bootmap_size = init_bootmem(mapstart, highest); - + bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, + min_low_pfn, max_low_pfn); /* * Register fully available low RAM pages with the bootmem allocator. */ |