patch-2.3.39 linux/arch/ppc/treeboot/misc.S

• Lines: 43
• Date: Mon Jan 10 18:25:05 2000
• Orig file: v2.3.38/linux/arch/ppc/treeboot/misc.S
• Orig date: Tue Dec 7 09:32:42 1999

diff -u --recursive --new-file v2.3.38/linux/arch/ppc/treeboot/misc.S linux/arch/ppc/treeboot/misc.S
@@ -6,6 +6,9 @@
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
+
+#include "../kernel/ppc_asm.tmpl"
+
 	.text
 
 /*
@@ -15,14 +18,23 @@
  */
 	.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
+	mfpvr	r5			# Get processor version register
+	extrwi	r5,r5,16,0		# Get the version bits
+	cmpwi	cr0,r5,0x0020		# Is this a 403-based processor?
+	beq	1f			# Yes, it is
+	li	r5,32			# It is not a 403, set to 32 bytes
+	addi	r4,r4,32-1		# len += line_size - 1
+	srwi.	r4,r4,5			# Convert from bytes to lines
+	b	2f
+1:	li	r5,16			# It is a 403, set to 16 bytes
+	addi	r4,r4,16-1		# len += line_size - 1
+	srwi.	r4,r4,4			# Convert from bytes to lines
+2:	mtctr	r4			# Set-up the counter register
+	beqlr				# If it is 0, we are done
+3:	dcbf	r0,r3			# Flush and invalidate the data line
+	icbi	r0,r3			# Invalidate the instruction line
+	add	r3,r3,r5		# Move to the next line
+	bdnz	3b			# Are we done yet?
 	sync
 	isync
-	blr
+	blr				# Return to the caller