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| author | Huang, Ying <ying.huang@intel.com> | 2008-03-28 10:49:42 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-26 21:34:42 +0200 |
| commit | 50eae2a7c9862afe263a2003c12f457ecfc9e6a2 (patch) | |
| tree | 96e8e53c168c4c4cc983f629151091c17014be3b | |
| parent | 4a27214d7be31e122db4102166f49ec15958e8e9 (diff) | |
| download | op-kernel-dev-50eae2a7c9862afe263a2003c12f457ecfc9e6a2.zip op-kernel-dev-50eae2a7c9862afe263a2003c12f457ecfc9e6a2.tar.gz | |
x86, boot: add free_early to early reservation machanism
Add free_early to early reservation mechanism - this way early bootup
failure paths can stop wasting memory.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/kernel/e820_64.c | 22 | ||||
| -rw-r--r-- | include/asm-x86/e820_64.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c index cbd42e5..79f0d52 100644 --- a/arch/x86/kernel/e820_64.c +++ b/arch/x86/kernel/e820_64.c @@ -84,6 +84,28 @@ void __init reserve_early(unsigned long start, unsigned long end, char *name) strncpy(r->name, name, sizeof(r->name) - 1); } +void __init free_early(unsigned long start, unsigned long end) +{ + struct early_res *r; + int i, j; + + for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) { + r = &early_res[i]; + if (start == r->start && end == r->end) + break; + } + if (i >= MAX_EARLY_RES || !early_res[i].end) + panic("free_early on not reserved area: %lx-%lx!", start, end); + + for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++) + ; + + memcpy(&early_res[i], &early_res[i + 1], + (j - 1 - i) * sizeof(struct early_res)); + + early_res[j - 1].end = 0; +} + void __init early_res_to_bootmem(void) { int i; diff --git a/include/asm-x86/e820_64.h b/include/asm-x86/e820_64.h index f478c57..b5e02e3 100644 --- a/include/asm-x86/e820_64.h +++ b/include/asm-x86/e820_64.h @@ -48,6 +48,7 @@ extern struct e820map e820; extern void update_e820(void); extern void reserve_early(unsigned long start, unsigned long end, char *name); +extern void free_early(unsigned long start, unsigned long end); extern void early_res_to_bootmem(void); #endif/*!__ASSEMBLY__*/ |
