patch-2.4.0-test8 linux/arch/arm/boot/compressed/head-ftvpci.S

• Lines: 41
• Date: Sun Sep 3 11:19:11 2000
• Orig file: v2.4.0-test7/linux/arch/arm/boot/compressed/head-ftvpci.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test7/linux/arch/arm/boot/compressed/head-ftvpci.S linux/arch/arm/boot/compressed/head-ftvpci.S
@@ -0,0 +1,40 @@
+/* 
+ * linux/arch/arm/boot/compressed/head-ftvpci.S
+ * 
+ * Copyright (C) 2000 FutureTV Labs Ltd.
+ * 
+ * Special startup code for FTV PCI board.
+ */
+
+	.section        ".start", #alloc, #execinstr
+ftv_start:
+	mcr	p15, 0, r0, c7, c5, 0		@ flush I cache
+	mrc	p15, 0, r0, c1, c0
+	orr	r0, r0, #1 << 12
+	mcr	p15, 0, r0, c1, c0		@ enable I cache
+	mov	r0, #0
+	mcreq	p15, 0, r0, c15, c1, 2		@ enable clock switching
+
+	/* check to see if the kernel must be relocated */
+	ldr	ip, =ftv_start
+	adr	sl, ftv_start
+	teq	ip, sl
+	beq	2f				@ no need to copy
+
+	/* in the wrong place -> presumably, executing out of ROM */
+	sub	ip, ip, sl			@ displacement
+	ldr	lr, =_start			@ destination
+	sub	sp, lr, ip			@ source
+	ldr	fp, =_edata			@ end of copied area
+1:	ldmia	sp!, {r0, r1, r2, r3, r4, r5, r6, r10}
+	stmia	lr!, {r0, r1, r2, r3, r4, r5, r6, r10}
+	cmp	lr, fp
+	ble	1b
+
+2:
+	mov	r8, #0
+	mov	r7, #3
+	b	1f
+.ltorg
+1:
+	/* fall back into head.S */