diff options
| -rw-r--r-- | arch/x86/kernel/e820.c | 59 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 3 | ||||
| -rw-r--r-- | include/asm-x86/bootparam.h | 1 | ||||
| -rw-r--r-- | include/asm-x86/e820.h | 2 |
4 files changed, 52 insertions, 13 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index ed46b7a6bc1..544dd12c70f 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -359,6 +359,26 @@ static struct e820entry new_bios[E820_X_MAX] __initdata; return 0; } +static int __init __copy_e820_map(struct e820entry *biosmap, int nr_map) +{ + while (nr_map) { + u64 start = biosmap->addr; + u64 size = biosmap->size; + u64 end = start + size; + u32 type = biosmap->type; + + /* Overflow in 64 bits? Ignore the memory map. */ + if (start > end) + return -1; + + e820_add_region(start, size, type); + + biosmap++; + nr_map--; + } + return 0; +} + /* * Copy the BIOS e820 map into a safe place. * @@ -374,19 +394,7 @@ int __init copy_e820_map(struct e820entry *biosmap, int nr_map) if (nr_map < 2) return -1; - do { - u64 start = biosmap->addr; - u64 size = biosmap->size; - u64 end = start + size; - u32 type = biosmap->type; - - /* Overflow in 64 bits? Ignore the memory map. */ - if (start > end) - return -1; - - e820_add_region(start, size, type); - } while (biosmap++, --nr_map); - return 0; + return __copy_e820_map(biosmap, nr_map); } u64 __init e820_update_range(u64 start, u64 size, unsigned old_type, @@ -496,6 +504,31 @@ __init void e820_setup_gap(void) pci_mem_start, gapstart, gapsize); } +/** + * Because of the size limitation of struct boot_params, only first + * 128 E820 memory entries are passed to kernel via + * boot_params.e820_map, others are passed via SETUP_E820_EXT node of + * linked list of struct setup_data, which is parsed here. + */ +void __init parse_e820_ext(struct setup_data *sdata, unsigned long pa_data) +{ + u32 map_len; + int entries; + struct e820entry *extmap; + + entries = sdata->len / sizeof(struct e820entry); + map_len = sdata->len + sizeof(struct setup_data); + if (map_len > PAGE_SIZE) + sdata = early_ioremap(pa_data, map_len); + extmap = (struct e820entry *)(sdata->data); + __copy_e820_map(extmap, entries); + sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); + if (map_len > PAGE_SIZE) + early_iounmap(sdata, map_len); + printk(KERN_INFO "extended physical RAM map:\n"); + e820_print_map("extended"); +} + #if defined(CONFIG_X86_64) || \ (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) /** diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 45a5e247d45..5b0de38cde4 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -150,6 +150,9 @@ void __init parse_setup_data(void) while (pa_data) { data = early_ioremap(pa_data, PAGE_SIZE); switch (data->type) { + case SETUP_E820_EXT: + parse_e820_ext(data, pa_data); + break; default: break; } diff --git a/include/asm-x86/bootparam.h b/include/asm-x86/bootparam.h index 0a073904168..876f2113666 100644 --- a/include/asm-x86/bootparam.h +++ b/include/asm-x86/bootparam.h @@ -11,6 +11,7 @@ /* setup data types */ #define SETUP_NONE 0 +#define SETUP_E820_EXT 1 /* extensible setup data list node */ struct setup_data { diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h index 55d31059690..77fc24d8916 100644 --- a/include/asm-x86/e820.h +++ b/include/asm-x86/e820.h @@ -69,6 +69,8 @@ extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, unsigned new_type); extern void update_e820(void); extern void e820_setup_gap(void); +struct setup_data; +extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data); #if defined(CONFIG_X86_64) || \ (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) |