Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem

when rest of GRUB is compiled for hisher stepping. Instead use
	.set mips3/.set mips1 around cache and sync opcodes.

ChangeLog

@@ -1,3 +1,9 @@
+2013-11-22  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	Remove -march=mips3 from TARGET_CCASFLAGS as it creates linking problem
+	when rest of GRUB is compiled for hisher stepping. Instead use
+	.set mips3/.set mips1 around cache and sync opcodes.
+
 2013-11-21  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Unify GOT/trampoline handling between PPC, MIPS and IA64 as they

conf/Makefile.common

@@ -12,7 +12,6 @@ if COND_mips_loongson
 endif
 if COND_mips
   CFLAGS_PLATFORM += -mflush-func=grub_red_herring
-  CCASFLAGS_PLATFORM = -march=mips3
 endif
 if COND_sparc64_ieee1275
   CFLAGS_PLATFORM += -mno-app-regs

grub-core/kern/mips/cache.S

@@ -20,11 +20,11 @@ FUNCTION (grub_arch_sync_dma_caches)
 	move $t0, $t2
 	subu $t1, $t3, $t2
 1:
-	cache 1, 0($t0)
+	cache_op 1, 0($t0)
 #ifdef GRUB_MACHINE_MIPS_LOONGSON
-	cache 1, 1($t0)
+	cache_op 1, 1($t0)
-	cache 1, 2($t0)
+	cache_op 1, 2($t0)
-	cache 1, 3($t0)
+	cache_op 1, 3($t0)
 
 	addiu $t1, $t1, -0x20
 	bne $t1, $zero, 1b
@@ -34,36 +34,36 @@ FUNCTION (grub_arch_sync_dma_caches)
 	bne $t1, $zero, 1b
 	 addiu $t0, $t0, 0x4
 #endif
-	sync
+	sync_op
 	move $t0, $t2
 	subu $t1, $t3, $t2
 2:
 #ifdef GRUB_MACHINE_MIPS_LOONGSON
-	cache 0, 0($t0)
+	cache_op 0, 0($t0)
 	addiu $t1, $t1, -0x20
 	bne $t1, $zero, 2b
 	 addiu $t0, $t0, 0x20
 #else
-	cache 0, 0($t0)
+	cache_op 0, 0($t0)
 	addiu $t1, $t1, -4
 	bne $t1, $zero, 2b
 	 addiu $t0, $t0, 0x4
 #endif
-	sync
+	sync_op
 	move $t0, $t2
 	subu $t1, $t3, $t2
 2:
 #ifdef GRUB_MACHINE_MIPS_LOONGSON
-	cache 23, 0($t0)
+	cache_op 23, 0($t0)
 	addiu $t1, $t1, -0x20
 	bne $t1, $zero, 2b
 	 addiu $t0, $t0, 0x20
 #else
-	cache 23, 0($t0)
+	cache_op 23, 0($t0)
 	addiu $t1, $t1, -0x4
 	bne $t1, $zero, 2b
 	 addiu $t0, $t0, 0x4
 #endif
-	sync
+	sync_op
 
 	jr $ra

grub-core/kern/mips/cache_flush.S

@@ -1,3 +1,17 @@
+#ifndef CACHE_OP_DEFINED
+#define CACHE_OP_DEFINED 1
+	.macro cache_op op addr
+	.set mips3
+	cache \op, \addr
+	.set mips1
+	.endm
+	.macro sync_op
+	.set mips3
+	sync
+	.set mips1
+	.endm
+#endif
+
 	move $t2, $a0
 	addu $t3, $a0, $a1
 	srl $t2, $t2, 5
@@ -8,12 +22,12 @@
 	move $t0, $t2
 	subu $t1, $t3, $t2
 1:
-	cache 1, 0($t0)
+	cache_op 1, 0($t0)
 	/* All four ways.  */
 #ifdef GRUB_MACHINE_MIPS_LOONGSON
-	cache 1, 1($t0)
+	cache_op 1, 1($t0)
-	cache 1, 2($t0)
+	cache_op 1, 2($t0)
-	cache 1, 3($t0)
+	cache_op 1, 3($t0)
 	addiu $t1, $t1, -0x20
 	bne $t1, $zero, 1b
 	 addiu $t0, $t0, 0x20
@@ -23,11 +37,11 @@
 	bne $t1, $zero, 1b
 	 addiu $t0, $t0, 0x4
 #endif
-	sync
+	sync_op
 	move $t0, $t2
 	subu $t1, $t3, $t2
 2:
-	cache 0, 0($t0)
+	cache_op 0, 0($t0)
 #ifdef GRUB_MACHINE_MIPS_LOONGSON
 	addiu $t1, $t1, -0x20
 	bne $t1, $zero, 2b
@@ -37,4 +51,4 @@
 	bne $t1, $zero, 2b
 	 addiu $t0, $t0, 0x4
 #endif
-	sync
+	sync_op