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Date: Wed, 25 Jun 2008 17:49:26 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 03/16] x86: update reserve_initrd to support 64bit
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
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
@@ -186,43 +186,18 @@ static inline void copy_edd(void)
#ifdef CONFIG_BLK_DEV_INITRD
-static void __init relocate_initrd(void);
+#ifdef CONFIG_X86_32
-static void __init reserve_initrd(void)
+#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
+static void __init relocate_initrd(void)
{
+
u64 ramdisk_image = boot_params.hdr.ramdisk_image;
u64 ramdisk_size = boot_params.hdr.ramdisk_size;
- u64 ramdisk_end = ramdisk_image + ramdisk_size;
u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
u64 ramdisk_here;
-
- if (!boot_params.hdr.type_of_loader ||
- !ramdisk_image || !ramdisk_size)
- return; /* No initrd provided by bootloader */
-
- initrd_start = 0;
-
- if (ramdisk_size >= (end_of_lowmem>>1)) {
- free_early(ramdisk_image, ramdisk_end);
- printk(KERN_ERR "initrd too large to handle, "
- "disabling initrd\n");
- return;
- }
-
- printk(KERN_INFO "old RAMDISK: %08llx - %08llx\n", ramdisk_image,
- ramdisk_end);
-
-
- if (ramdisk_end <= end_of_lowmem) {
- /* All in lowmem, easy case */
- /*
- * don't need to reserve again, already reserved early
- * in i386_start_kernel
- */
- initrd_start = ramdisk_image + PAGE_OFFSET;
- initrd_end = initrd_start + ramdisk_size;
- return;
- }
+ unsigned long slop, clen, mapaddr;
+ char *p, *q;
/* We need to move the initrd down into lowmem */
ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
@@ -241,22 +216,6 @@ static void __init reserve_initrd(void)
printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
ramdisk_here, ramdisk_here + ramdisk_size);
- relocate_initrd();
-}
-
-#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
-
-static void __init relocate_initrd(void)
-{
- u64 ramdisk_image = boot_params.hdr.ramdisk_image;
- u64 ramdisk_size = boot_params.hdr.ramdisk_size;
- u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
- u64 ramdisk_here;
- unsigned long slop, clen, mapaddr;
- char *p, *q;
-
- ramdisk_here = initrd_start - PAGE_OFFSET;
-
q = (char *)initrd_start;
/* Copy any lowmem portion of the initrd */
@@ -286,18 +245,60 @@ static void __init relocate_initrd(void)
/* high pages is not converted by early_res_to_bootmem */
ramdisk_image = boot_params.hdr.ramdisk_image;
ramdisk_size = boot_params.hdr.ramdisk_size;
- printk(KERN_INFO "Copied RAMDISK from %016llx - %016llx to %08llx - %08llx\n",
+ printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
+ " %08llx - %08llx\n",
ramdisk_image, ramdisk_image + ramdisk_size - 1,
ramdisk_here, ramdisk_here + ramdisk_size - 1);
+}
+#endif
- /*
- * need to free old one, otherwise init cross max_low_pfn could be
- * converted to bootmem
- */
- free_early(ramdisk_image, ramdisk_image+ramdisk_size);
+static void __init reserve_initrd(void)
+{
+ u64 ramdisk_image = boot_params.hdr.ramdisk_image;
+ u64 ramdisk_size = boot_params.hdr.ramdisk_size;
+ u64 ramdisk_end = ramdisk_image + ramdisk_size;
+ u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+
+ if (!boot_params.hdr.type_of_loader ||
+ !ramdisk_image || !ramdisk_size)
+ return; /* No initrd provided by bootloader */
+
+ initrd_start = 0;
+
+ if (ramdisk_size >= (end_of_lowmem>>1)) {
+ free_early(ramdisk_image, ramdisk_end);
+ printk(KERN_ERR "initrd too large to handle, "
+ "disabling initrd\n");
+ return;
+ }
+
+ printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
+ ramdisk_end);
+
+
+ if (ramdisk_end <= end_of_lowmem) {
+ /* All in lowmem, easy case */
+ /*
+ * don't need to reserve again, already reserved early
+ * in i386_start_kernel
+ */
+ initrd_start = ramdisk_image + PAGE_OFFSET;
+ initrd_end = initrd_start + ramdisk_size;
+ return;
+ }
+
+#ifdef CONFIG_X86_32
+ relocate_initrd();
+#else
+ printk(KERN_ERR "initrd extends beyond end of memory "
+ "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
+ ramdisk_end, end_of_lowmem);
+ initrd_start = 0;
+#endif
+ free_early(ramdisk_image, ramdisk_end);
}
#else
-void __init reserve_initrd(void)
+static void __init reserve_initrd(void)
{
}
#endif /* CONFIG_BLK_DEV_INITRD */
--
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