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diff -uprN linux-2.6.23.orig/arch/arm/kernel/relocate_kernel.S linux-2.6.23/arch/arm/kernel/relocate_kernel.S
--- linux-2.6.23.orig/arch/arm/kernel/relocate_kernel.S 2007-10-09 15:31:38.000000000 -0500
+++ linux-2.6.23/arch/arm/kernel/relocate_kernel.S 2007-10-09 22:19:32.000000000 -0500
@@ -7,6 +7,23 @@
.globl relocate_new_kernel
relocate_new_kernel:
+ /* Move boot params back to where the kernel expects them */
+
+ ldr r0,kexec_boot_params_address
+ teq r0,#0
+ beq 8f
+
+ ldr r1,kexec_boot_params_copy
+ mov r6,#KEXEC_BOOT_PARAMS_SIZE/4
+7:
+ ldr r5,[r1],#4
+ str r5,[r0],#4
+ subs r6,r6,#1
+ bne 7b
+
+8:
+ /* Boot params moved, now go on with the kernel */
+
ldr r0,kexec_indirection_page
ldr r1,kexec_start_address
@@ -50,7 +67,7 @@ relocate_new_kernel:
mov lr,r1
mov r0,#0
ldr r1,kexec_mach_type
- mov r2,#0
+ ldr r2,kexec_boot_params_address
mov pc,lr
.globl kexec_start_address
@@ -65,6 +82,16 @@ kexec_indirection_page:
kexec_mach_type:
.long 0x0
+ /* phy addr where new kernel will expect to find boot params */
+ .globl kexec_boot_params_address
+kexec_boot_params_address:
+ .long 0x0
+
+ /* phy addr where old kernel put a copy of orig boot params */
+ .globl kexec_boot_params_copy
+kexec_boot_params_copy:
+ .long 0x0
+
relocate_new_kernel_end:
.globl relocate_new_kernel_size
diff -uprN linux-2.6.23.orig/arch/arm/kernel/setup.c linux-2.6.23/arch/arm/kernel/setup.c
--- linux-2.6.23.orig/arch/arm/kernel/setup.c 2007-10-09 15:31:38.000000000 -0500
+++ linux-2.6.23/arch/arm/kernel/setup.c 2007-10-09 20:06:10.000000000 -0500
@@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#include <linux/smp.h>
#include <linux/fs.h>
+#include <linux/kexec.h>
#include <asm/cpu.h>
#include <asm/elf.h>
@@ -770,6 +771,23 @@ static int __init customize_machine(void
}
arch_initcall(customize_machine);
+#ifdef CONFIG_KEXEC
+
+/* Physical addr of where the boot params should be for this machine */
+extern unsigned long kexec_boot_params_address;
+
+/* Physical addr of the buffer into which the boot params are copied */
+extern unsigned long kexec_boot_params_copy;
+
+/* Pointer to the boot params buffer, for manipulation and display */
+unsigned long kexec_boot_params;
+EXPORT_SYMBOL(kexec_boot_params);
+
+/* The buffer itself - make sure it is sized correctly */
+static unsigned long kexec_boot_params_buf[(KEXEC_BOOT_PARAMS_SIZE + 3) / 4];
+
+#endif
+
void __init setup_arch(char **cmdline_p)
{
struct tag *tags = (struct tag *)&init_tags;
@@ -788,6 +806,18 @@ void __init setup_arch(char **cmdline_p)
else if (mdesc->boot_params)
tags = phys_to_virt(mdesc->boot_params);
+#ifdef CONFIG_KEXEC
+ kexec_boot_params_copy = virt_to_phys(kexec_boot_params_buf);
+ kexec_boot_params = (unsigned long)kexec_boot_params_buf;
+ if (__atags_pointer) {
+ kexec_boot_params_address = __atags_pointer;
+ memcpy((void *)kexec_boot_params, tags, KEXEC_BOOT_PARAMS_SIZE);
+ } else if (mdesc->boot_params) {
+ kexec_boot_params_address = mdesc->boot_params;
+ memcpy((void *)kexec_boot_params, tags, KEXEC_BOOT_PARAMS_SIZE);
+ }
+#endif
+
/*
* If we have the old style parameters, convert them to
* a tag list.
diff -uprN linux-2.6.23.orig/include/asm-arm/kexec.h linux-2.6.23/include/asm-arm/kexec.h
--- linux-2.6.23.orig/include/asm-arm/kexec.h 2007-10-09 15:31:38.000000000 -0500
+++ linux-2.6.23/include/asm-arm/kexec.h 2007-10-09 22:19:32.000000000 -0500
@@ -14,6 +14,8 @@
#define KEXEC_ARCH KEXEC_ARCH_ARM
+#define KEXEC_BOOT_PARAMS_SIZE 1536
+
#ifndef __ASSEMBLY__
struct kimage;
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