diff options
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/lmb.c | 13 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 21 |
2 files changed, 32 insertions, 2 deletions
diff --git a/arch/powerpc/mm/lmb.c b/arch/powerpc/mm/lmb.c index 8f4d2dc4caf..4ce23bcf8a5 100644 --- a/arch/powerpc/mm/lmb.c +++ b/arch/powerpc/mm/lmb.c @@ -342,3 +342,16 @@ void __init lmb_enforce_memory_limit(unsigned long memory_limit) } } } + +int __init lmb_is_reserved(unsigned long addr) +{ + int i; + + for (i = 0; i < lmb.reserved.cnt; i++) { + unsigned long upper = lmb.reserved.region[i].base + + lmb.reserved.region[i].size - 1; + if ((addr >= lmb.reserved.region[i].base) && (addr <= upper)) + return 1; + } + return 0; +} diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 5402fb6b3aa..e8122447f01 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -213,15 +213,30 @@ void __init do_init_bootmem(void) */ #ifdef CONFIG_HIGHMEM free_bootmem_with_active_regions(0, total_lowmem >> PAGE_SHIFT); + + /* reserve the sections we're already using */ + for (i = 0; i < lmb.reserved.cnt; i++) { + unsigned long addr = lmb.reserved.region[i].base + + lmb_size_bytes(&lmb.reserved, i) - 1; + if (addr < total_lowmem) + reserve_bootmem(lmb.reserved.region[i].base, + lmb_size_bytes(&lmb.reserved, i)); + else if (lmb.reserved.region[i].base < total_lowmem) { + unsigned long adjusted_size = total_lowmem - + lmb.reserved.region[i].base; + reserve_bootmem(lmb.reserved.region[i].base, + adjusted_size); + } + } #else free_bootmem_with_active_regions(0, max_pfn); -#endif /* reserve the sections we're already using */ for (i = 0; i < lmb.reserved.cnt; i++) reserve_bootmem(lmb.reserved.region[i].base, lmb_size_bytes(&lmb.reserved, i)); +#endif /* XXX need to clip this if using highmem? */ sparse_memory_present_with_active_regions(0); @@ -334,11 +349,13 @@ void __init mem_init(void) highmem_mapnr = total_lowmem >> PAGE_SHIFT; for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) { struct page *page = pfn_to_page(pfn); - + if (lmb_is_reserved(pfn << PAGE_SHIFT)) + continue; ClearPageReserved(page); init_page_count(page); __free_page(page); totalhigh_pages++; + reservedpages--; } totalram_pages += totalhigh_pages; printk(KERN_DEBUG "High memory: %luk\n", |