From: "Huang, Ying" <ying.huang@intel.com>
To: "H. Peter Anvin" <hpa@zytor.com>,
andi@firstfloor.org, mingo@redhat.com, tglx@linutronix.de,
Paul Jackson <pj@sgi.com>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 1/4] x86_64 boot -v2: Add free_early to early reservation machanism
Date: Fri, 28 Mar 2008 10:49:42 +0800 [thread overview]
Message-ID: <1206672582.13404.23.camel@caritas-dev.intel.com> (raw)
Add free_early to early reservation mechanism.
Signed-off-by: Huang Ying <ying.huang@intel.com>
---
arch/x86/kernel/e820_64.c | 17 +++++++++++++++++
include/asm-x86/e820_64.h | 1 +
2 files changed, 18 insertions(+)
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -83,6 +83,23 @@ void __init reserve_early(unsigned long
strncpy(r->name, name, sizeof(r->name) - 1);
}
+void __init free_early(unsigned long start, unsigned long end)
+{
+ int i, j;
+ struct early_res *r;
+ 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(unsigned long start, unsigned long end)
{
int i;
--- 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(unsigned long start, unsigned long end);
#endif/*!__ASSEMBLY__*/
reply other threads:[~2008-03-28 2:49 UTC|newest]
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