---

yaml
---
r: 69493
b: refs/heads/master
c: 033b8ff
h: refs/heads/master
i:
  69491: 69f9707
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 84aa462e2c2cd1b921f6b8e283f8d41666e02e8e
+refs/heads/master: 033b8ffe3f1ea8174d51d125838ac6deea60f63f

trunk/arch/arm/kernel/relocate_kernel.S

@@ -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

trunk/arch/arm/kernel/setup.c

@@ -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>
@@ -783,6 +784,23 @@ 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;
@@ -801,6 +819,18 @@ 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.

trunk/include/asm-arm/kexec.h

@@ -14,6 +14,8 @@
 
 #define KEXEC_ARCH KEXEC_ARCH_ARM
 
+#define KEXEC_BOOT_PARAMS_SIZE 1536
+
 #ifndef __ASSEMBLY__
 
 struct kimage;