patch-2.4.5 linux/arch/ppc/boot/pmac/misc.S

• Lines: 61
• Date: Thu May 24 15:02:07 2001
• Orig file: v2.4.4/linux/arch/ppc/boot/pmac/misc.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.4/linux/arch/ppc/boot/pmac/misc.S linux/arch/ppc/boot/pmac/misc.S
@@ -0,0 +1,60 @@
+/*
+ * BK Id: SCCS/s.misc.S 1.6 05/18/01 15:17:15 cort
+ */
+/*
+ * Copyright (C) Paul Mackerras 1997.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+	.text
+
+/*
+ * Use the BAT3 registers to map the 1st 8MB of RAM to
+ * the address given as the 1st argument.
+ */
+	.globl	setup_bats
+setup_bats:
+	mfpvr	5
+	rlwinm	5,5,16,16,31		/* r3 = 1 for 601, 4 for 604 */
+	cmpi	0,5,1
+	li	0,0
+	bne	4f
+	mtibatl	3,0			/* invalidate BAT first */
+	ori	3,3,4			/* set up BAT registers for 601 */
+	li	4,0x7f
+	mtibatu	3,3
+	mtibatl	3,4
+	b	5f
+4:	mtdbatu	3,0			/* invalidate BATs first */
+	mtibatu	3,0
+	ori	3,3,0xff		/* set up BAT registers for 604 */
+	li	4,2
+	mtdbatl	3,4
+	mtdbatu	3,3
+	mtibatl	3,4
+	mtibatu	3,3
+5:	sync
+	isync
+	blr
+
+/*
+ * Flush the dcache and invalidate the icache for a range of addresses.
+ *
+ * flush_cache(addr, len)
+ */
+	.global	flush_cache
+flush_cache:
+	addi	4,4,0x1f	/* len = (len + 0x1f) / 0x20 */
+	rlwinm.	4,4,27,5,31
+	mtctr	4
+	beqlr
+1:	dcbf	0,3
+	icbi	0,3
+	addi	3,3,0x20
+	bdnz	1b
+	sync
+	isync
+	blr