patch-2.1.79 linux/arch/ppc/chrpboot/misc.S

• Lines: 51
• Date: Mon Jan 12 15:18:13 1998
• Orig file: v2.1.78/linux/arch/ppc/chrpboot/misc.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.78/linux/arch/ppc/chrpboot/misc.S linux/arch/ppc/chrpboot/misc.S
@@ -0,0 +1,50 @@
+/*
+ * 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 BAT0 registers to map the 1st 8MB of RAM to 0x90000000.
+ */
+	.globl	setup_bats
+setup_bats:
+	mfpvr	3
+	rlwinm	3,3,16,16,31		/* r3 = 1 for 601, 4 for 604 */
+	cmpi	0,3,1
+	lis	4,0x9000
+	bne	4f
+	ori	4,4,4			/* set up BAT registers for 601 */
+	li	5,0x7f
+	b	5f
+4:	ori	4,4,0xff		/* set up BAT registers for 604 */
+	li	5,2
+	mtdbatu	0,4
+	mtdbatl	0,5
+5:	mtibatu	0,4
+	mtibatl	0,5
+	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