patch-2.4.23 linux-2.4.23/arch/sh/boot/compressed/head.S

• Lines: 64
• Date: 2003-11-28 10:26:19.000000000 -0800
• Orig file: linux-2.4.22/arch/sh/boot/compressed/head.S
• Orig date: 2001-01-28 18:56:00.000000000 -0800

diff -urN linux-2.4.22/arch/sh/boot/compressed/head.S linux-2.4.23/arch/sh/boot/compressed/head.S
@@ -2,6 +2,7 @@
  *  linux/arch/sh/boot/compressed/head.S
  *
  *  Copyright (C) 1999 Stuart Menefy
+ *  Copyright (C) 2003 SUGIOKA Toshinobu
  */
 
 .text
@@ -14,7 +15,54 @@
 	mov.l   init_sr, r1
 	ldc     r1, sr
 
-	/* First clear BSS */
+	/* Move myself to proper location if necessary */
+	mova	1f, r0
+	mov.l	1f, r2
+	cmp/eq	r2, r0
+	bt	clear_bss
+	sub	r0, r2
+	mov.l	bss_start_addr, r0
+	mov	#0xe0, r1
+	and	r1, r0			! align cache line
+	mov.l	text_start_addr, r3
+	mov	r0, r1
+	sub	r2, r1
+3:
+	mov.l	@r1, r4
+	mov.l	@(4,r1), r5
+	mov.l	@(8,r1), r6
+	mov.l	@(12,r1), r7
+	mov.l	@(16,r1), r8
+	mov.l	@(20,r1), r9
+	mov.l	@(24,r1), r10
+	mov.l	@(28,r1), r11
+	mov.l	r4, @r0
+	mov.l	r5, @(4,r0)
+	mov.l	r6, @(8,r0)
+	mov.l	r7, @(12,r0)
+	mov.l	r8, @(16,r0)
+	mov.l	r9, @(20,r0)
+	mov.l	r10, @(24,r0)
+	mov.l	r11, @(28,r0)
+#ifdef CONFIG_CPU_SH4
+	ocbwb	@r0
+#endif
+	cmp/hi	r3, r0
+	add	#-32, r0
+	bt/s	3b
+	 add	#-32, r1
+	mov.l	2f, r0
+	jmp	@r0
+	 nop
+
+	.align 2
+1:	.long	1b
+2:	.long	clear_bss
+text_start_addr:
+	.long	startup
+
+	/* Clear BSS */
+clear_bss:
 	mov.l	end_addr, r1
 	mov.l	bss_start_addr, r2
 	mov	#0, r0