diff options
Diffstat (limited to 'arch/x86/kernel/e820_64.c')
| -rw-r--r-- | arch/x86/kernel/e820_64.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c index 57616865d8a0..04698e0b056c 100644 --- a/arch/x86/kernel/e820_64.c +++ b/arch/x86/kernel/e820_64.c @@ -47,7 +47,7 @@ unsigned long end_pfn_map; */ static unsigned long __initdata end_user_pfn = MAXMEM>>PAGE_SHIFT; -extern struct resource code_resource, data_resource; +extern struct resource code_resource, data_resource, bss_resource; /* Check for some hardcoded bad areas that early boot is not allowed to touch */ static inline int bad_addr(unsigned long *addrp, unsigned long size) @@ -225,6 +225,7 @@ void __init e820_reserve_resources(void) */ request_resource(res, &code_resource); request_resource(res, &data_resource); + request_resource(res, &bss_resource); #ifdef CONFIG_KEXEC if (crashk_res.start != crashk_res.end) request_resource(res, &crashk_res); @@ -729,3 +730,22 @@ __init void e820_setup_gap(void) printk(KERN_INFO "Allocating PCI resources starting at %lx (gap: %lx:%lx)\n", pci_mem_start, gapstart, gapsize); } + +int __init arch_get_ram_range(int slot, u64 *addr, u64 *size) +{ + int i; + + if (slot < 0 || slot >= e820.nr_map) + return -1; + for (i = slot; i < e820.nr_map; i++) { + if (e820.map[i].type != E820_RAM) + continue; + break; + } + if (i == e820.nr_map || e820.map[i].addr > (max_pfn << PAGE_SHIFT)) + return -1; + *addr = e820.map[i].addr; + *size = min_t(u64, e820.map[i].size + e820.map[i].addr, + max_pfn << PAGE_SHIFT) - *addr; + return i + 1; +} |