patch-2.4.0-test2 linux/arch/sh/boot/compressed/head.S

• Lines: 54
• Date: Mon Jun 19 17:59:37 2000
• Orig file: v2.4.0-test1/linux/arch/sh/boot/compressed/head.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/arch/sh/boot/compressed/head.S linux/arch/sh/boot/compressed/head.S
@@ -0,0 +1,53 @@
+/*
+ *  linux/arch/sh/boot/compressed/head.S
+ *
+ *  Copyright (C) 1999 Stuart Menefy
+ */
+
+.text
+
+#include <linux/linkage.h>
+
+	.global	startup
+startup:
+
+	/* First clear BSS */
+	mov.l	end_addr, r1
+	mov.l	bss_start_addr, r2
+	mov	#0, r0
+l1:
+	mov.l	r0, @-r1
+	cmp/eq	r1,r2
+	bf	l1
+
+	/* Load initial status register */
+	mov.l   init_sr, r1
+	ldc     r1, sr
+	
+	/* Set the initial pointer. */
+	mov.l	init_stack_addr, r0
+	mov.l	@r0, r15
+
+	/* Decompress the kernel */
+	mov.l	decompress_kernel_addr, r0
+	jsr	@r0
+	nop
+
+	/* Jump to the start of the decompressed kernel */
+	mov.l	kernel_start_addr, r0
+	jmp	@r0
+	nop
+	
+	.align	2
+bss_start_addr:
+	.long	__bss_start
+end_addr:
+	.long	_end
+init_sr:
+	.long	0x50000000	/* Privileged mode, Bank=0, Block=1, I3-I0=0 */
+init_stack_addr:
+	.long	stack_start
+decompress_kernel_addr:
+	.long	decompress_kernel
+kernel_start_addr:
+	.long	_text+0x1000