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authorMarkos Chandras <markos.chandras@imgtec.com>2014-07-21 17:35:55 +0400
committerRalf Baechle <ralf@linux-mips.org>2014-08-26 04:18:57 +0400
commit43faaa5c97aa222f7f820f7c1e5200a4c44f6e0f (patch)
treea6193da0d4eeef66857f3d8caaa6553d4363e57b /arch/mips
parent64316467dc99e6b38ed1ca2197aa93535a7750e0 (diff)
downloadlinux-43faaa5c97aa222f7f820f7c1e5200a4c44f6e0f.tar.xz
MIPS: Malta: EVA: Rename 'eva_entry' to 'platform_eva_init'
Rename 'eva_entry' to 'platform_eva_init' as required by the new 'eva_init' macro in the eva.h header. Since this macro is now used in a platform dependent way, it must not depend on its caller so move the t1 register initialization inside this macro. Also set the .reorder assembler option in case the caller may have previously set .noreorder. This may allow a few assembler optimizations. Finally include missing headers and document the register usage for this macro. Reviewed-by: Paul Burton <paul.burton@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Patchwork: http://patchwork.linux-mips.org/patch/7423/ Signed-off-by: James Hogan <james.hogan@imgtec.com>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/mach-malta/kernel-entry-init.h22
1 files changed, 16 insertions, 6 deletions
diff --git a/arch/mips/include/asm/mach-malta/kernel-entry-init.h b/arch/mips/include/asm/mach-malta/kernel-entry-init.h
index 77eeda77e73c..0cf8622db27f 100644
--- a/arch/mips/include/asm/mach-malta/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-malta/kernel-entry-init.h
@@ -10,14 +10,15 @@
#ifndef __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H
#define __ASM_MACH_MIPS_KERNEL_ENTRY_INIT_H
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+
/*
* Prepare segments for EVA boot:
*
* This is in case the processor boots in legacy configuration
* (SI_EVAReset is de-asserted and CONFIG5.K == 0)
*
- * On entry, t1 is loaded with CP0_CONFIG
- *
* ========================= Mappings =============================
* Virtual memory Physical memory Mapping
* 0x00000000 - 0x7fffffff 0x80000000 - 0xfffffffff MUSUK (kuseg)
@@ -30,12 +31,20 @@
*
*
* Lowmem is expanded to 2GB
+ *
+ * The following code uses the t0, t1, t2 and ra registers without
+ * previously preserving them.
+ *
*/
- .macro eva_entry
+ .macro platform_eva_init
+
+ .set push
+ .set reorder
/*
* Get Config.K0 value and use it to program
* the segmentation registers
*/
+ mfc0 t1, CP0_CONFIG
andi t1, 0x7 /* CCA */
move t2, t1
ins t2, t1, 16, 3
@@ -77,6 +86,8 @@
mtc0 t0, $16, 5
sync
jal mips_ihb
+
+ .set pop
.endm
.macro kernel_entry_setup
@@ -95,7 +106,7 @@
sll t0, t0, 6 /* SC bit */
bgez t0, 9f
- eva_entry
+ platform_eva_init
b 0f
9:
/* Assume we came from YAMON... */
@@ -127,8 +138,7 @@ nonsc_processor:
#ifdef CONFIG_EVA
sync
ehb
- mfc0 t1, CP0_CONFIG
- eva_entry
+ platform_eva_init
#endif
.endm