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Message-Id: <200806221740.27116.yhlu.kernel@gmail.com>
Date: Sun, 22 Jun 2008 17:40:26 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: introduce reserve_initrd
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
arch/x86/kernel/setup_32.c | 16 ++++++++-----
arch/x86/kernel/setup_64.c | 53 ++++++++++++++++++++++++---------------------
arch/x86/mm/init_32.c | 6 +----
include/asm-x86/setup.h | 2 +
4 files changed, 43 insertions(+), 34 deletions(-)
Index: linux-2.6/arch/x86/kernel/setup_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_32.c
+++ linux-2.6/arch/x86/kernel/setup_32.c
@@ -337,7 +337,7 @@ void __init reserve_initrd(void)
* in i386_start_kernel
*/
initrd_start = ramdisk_image + PAGE_OFFSET;
- initrd_end = initrd_start+ramdisk_size;
+ initrd_end = initrd_start + ramdisk_size;
return;
}
@@ -364,7 +364,7 @@ void __init reserve_initrd(void)
#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
-static void __init relocate_initrd(void)
+static void __init post_reserve_initrd(void)
{
u64 ramdisk_image = boot_params.hdr.ramdisk_image;
u64 ramdisk_size = boot_params.hdr.ramdisk_size;
@@ -418,7 +418,13 @@ static void __init relocate_initrd(void)
/* need to free that, otherwise init highmem will reserve it again */
free_early(ramdisk_image, ramdisk_image+ramdisk_size);
}
-
+#else
+void __init reserve_initrd(void)
+{
+}
+static void __init post_reserve_initrd(void)
+{
+}
#endif /* CONFIG_BLK_DEV_INITRD */
/*
@@ -638,9 +644,7 @@ void __init setup_arch(char **cmdline_p)
* NOTE: at this point the bootmem allocator is fully available.
*/
-#ifdef CONFIG_BLK_DEV_INITRD
- relocate_initrd();
-#endif
+ post_reserve_initrd();
remapped_pgdat_init();
sparse_init();
Index: linux-2.6/arch/x86/kernel/setup_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_64.c
+++ linux-2.6/arch/x86/kernel/setup_64.c
@@ -154,6 +154,33 @@ static inline void copy_edd(void)
}
#endif
+void __init reserve_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
+ unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
+ unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
+ unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
+ unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
+
+ if (ramdisk_end <= end_of_mem) {
+ /*
+ * don't need to reserve again, already reserved early
+ * in x86_64_start_kernel, and early_res_to_bootmem
+ * will convert that to reserved in bootmem
+ */
+ initrd_start = ramdisk_image + PAGE_OFFSET;
+ initrd_end = initrd_start+ramdisk_size;
+ } else {
+ free_early(ramdisk_image, ramdisk_end);
+ printk(KERN_ERR "initrd extends beyond end of memory "
+ "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
+ ramdisk_end, end_of_mem);
+ initrd_start = 0;
+ }
+ }
+#endif
+}
/*
* setup_arch - architecture-specific boot-time initializations
*
@@ -251,6 +278,8 @@ void __init setup_arch(char **cmdline_p)
end_pfn = e820_end_of_ram();
}
+ reserve_initrd();
+
num_physpages = end_pfn;
check_efer();
@@ -307,30 +336,6 @@ void __init setup_arch(char **cmdline_p)
*/
find_smp_config();
#endif
-#ifdef CONFIG_BLK_DEV_INITRD
- if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
- unsigned long ramdisk_image = boot_params.hdr.ramdisk_image;
- unsigned long ramdisk_size = boot_params.hdr.ramdisk_size;
- unsigned long ramdisk_end = ramdisk_image + ramdisk_size;
- unsigned long end_of_mem = end_pfn << PAGE_SHIFT;
-
- if (ramdisk_end <= end_of_mem) {
- /*
- * don't need to reserve again, already reserved early
- * in x86_64_start_kernel, and early_res_to_bootmem
- * convert that to reserved in bootmem
- */
- initrd_start = ramdisk_image + PAGE_OFFSET;
- initrd_end = initrd_start+ramdisk_size;
- } else {
- free_bootmem(ramdisk_image, ramdisk_size);
- printk(KERN_ERR "initrd extends beyond end of memory "
- "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
- ramdisk_end, end_of_mem);
- initrd_start = 0;
- }
- }
-#endif
reserve_crashkernel();
reserve_ibft_region();
Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_32.c
+++ linux-2.6/arch/x86/mm/init_32.c
@@ -597,8 +597,6 @@ void __init zone_sizes_init(void)
}
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
-extern void reserve_initrd(void);
-
void __init setup_bootmem_allocator(void)
{
int i;
@@ -613,9 +611,9 @@ void __init setup_bootmem_allocator(void
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
-#ifdef CONFIG_BLK_DEV_INITRD
+
reserve_initrd();
-#endif
+
bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
Index: linux-2.6/include/asm-x86/setup.h
===================================================================
--- linux-2.6.orig/include/asm-x86/setup.h
+++ linux-2.6/include/asm-x86/setup.h
@@ -39,6 +39,8 @@ void reserve_crashkernel(void);
#include <asm/bootparam.h>
void reserve_standard_io_resources(void);
+void reserve_initrd(void);
+
#ifndef _SETUP
--
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