[PATCH 3/3] powerpc/fsl: Use the new interface to save or restore registers

[Dongsheng Wang]

From: Wang Dongsheng <dongsheng.wang at freescale.com>

Use fsl_cpu_state_save/fsl_cpu_state_restore to save/restore registers.
Use the functions to save/restore registers, so we don't need to
maintain the code.

Signed-off-by: Wang Dongsheng <dongsheng.wang at freescale.com>

diff --git a/arch/powerpc/kernel/swsusp_booke.S b/arch/powerpc/kernel/swsusp_booke.S
index 553c140..b5992db 100644
--- a/arch/powerpc/kernel/swsusp_booke.S
+++ b/arch/powerpc/kernel/swsusp_booke.S
@@ -4,92 +4,28 @@
  * Copyright (c) 2009-2010 MontaVista Software, LLC.
  */
 
-#include <linux/threads.h>
-#include <asm/processor.h>
 #include <asm/page.h>
-#include <asm/cputable.h>
-#include <asm/thread_info.h>
 #include <asm/ppc_asm.h>
 #include <asm/asm-offsets.h>
 #include <asm/mmu.h>
-
-/*
- * Structure for storing CPU registers on the save area.
- */
-#define SL_SP		0
-#define SL_PC		4
-#define SL_MSR		8
-#define SL_TCR		0xc
-#define SL_SPRG0	0x10
-#define SL_SPRG1	0x14
-#define SL_SPRG2	0x18
-#define SL_SPRG3	0x1c
-#define SL_SPRG4	0x20
-#define SL_SPRG5	0x24
-#define SL_SPRG6	0x28
-#define SL_SPRG7	0x2c
-#define SL_TBU		0x30
-#define SL_TBL		0x34
-#define SL_R2		0x38
-#define SL_CR		0x3c
-#define SL_LR		0x40
-#define SL_R12		0x44	/* r12 to r31 */
-#define SL_SIZE		(SL_R12 + 80)
-
-	.section .data
-	.align	5
-
-_GLOBAL(swsusp_save_area)
-	.space	SL_SIZE
-
+#include <asm/fsl_sleep.h>
 
 	.section .text
 	.align	5
 
 _GLOBAL(swsusp_arch_suspend)
-	lis	r11,swsusp_save_area at h
-	ori	r11,r11,swsusp_save_area at l
-
-	mflr	r0
-	stw	r0,SL_LR(r11)
-	mfcr	r0
-	stw	r0,SL_CR(r11)
-	stw	r1,SL_SP(r11)
-	stw	r2,SL_R2(r11)
-	stmw	r12,SL_R12(r11)
-
-	/* Save MSR & TCR */
-	mfmsr	r4
-	stw	r4,SL_MSR(r11)
-	mfspr	r4,SPRN_TCR
-	stw	r4,SL_TCR(r11)
-
-	/* Get a stable timebase and save it */
-1:	mfspr	r4,SPRN_TBRU
-	stw	r4,SL_TBU(r11)
-	mfspr	r5,SPRN_TBRL
-	stw	r5,SL_TBL(r11)
-	mfspr	r3,SPRN_TBRU
-	cmpw	r3,r4
-	bne	1b
+	mflr	r15
+	lis	r3, core_registers_save_area at h
+	ori	r3, r3, core_registers_save_area at l
+
+	/* Save base register */
+	li	r4, 0
+	bl	fsl_cpu_state_save
 
-	/* Save SPRGs */
-	mfspr	r4,SPRN_SPRG0
-	stw	r4,SL_SPRG0(r11)
-	mfspr	r4,SPRN_SPRG1
-	stw	r4,SL_SPRG1(r11)
-	mfspr	r4,SPRN_SPRG2
-	stw	r4,SL_SPRG2(r11)
-	mfspr	r4,SPRN_SPRG3
-	stw	r4,SL_SPRG3(r11)
-	mfspr	r4,SPRN_SPRG4
-	stw	r4,SL_SPRG4(r11)
-	mfspr	r4,SPRN_SPRG5
-	stw	r4,SL_SPRG5(r11)
-	mfspr	r4,SPRN_SPRG6
-	stw	r4,SL_SPRG6(r11)
-	mfspr	r4,SPRN_SPRG7
-	stw	r4,SL_SPRG7(r11)
+	/* Save LR */
+	lis	r3, core_registers_save_area at h
+	ori	r3, r3, core_registers_save_area at l
+	stw	r15, SR_LR(r3)
 
 	/* Call the low level suspend stuff (we should probably have made
 	 * a stackframe...
@@ -97,11 +33,12 @@ _GLOBAL(swsusp_arch_suspend)
 	bl	swsusp_save
 
 	/* Restore LR from the save area */
-	lis	r11,swsusp_save_area at h
-	ori	r11,r11,swsusp_save_area at l
-	lwz	r0,SL_LR(r11)
-	mtlr	r0
+	lis	r3, core_registers_save_area at h
+	ori	r3, r3, core_registers_save_area at l
+	lwz	r15, SR_LR(r3)
+	mtlr	r15
 
+	li	r3, 0
 	blr
 
 _GLOBAL(swsusp_arch_resume)
@@ -138,9 +75,6 @@ _GLOBAL(swsusp_arch_resume)
 	bl flush_dcache_L1
 	bl flush_instruction_cache
 
-	lis	r11,swsusp_save_area at h
-	ori	r11,r11,swsusp_save_area at l
-
 	/*
 	 * Mappings from virtual addresses to physical addresses may be
 	 * different than they were prior to restoring hibernation state. 
@@ -149,53 +83,12 @@ _GLOBAL(swsusp_arch_resume)
 	 */
 	bl	_tlbil_all
 
-	lwz	r4,SL_SPRG0(r11)
-	mtspr	SPRN_SPRG0,r4
-	lwz	r4,SL_SPRG1(r11)
-	mtspr	SPRN_SPRG1,r4
-	lwz	r4,SL_SPRG2(r11)
-	mtspr	SPRN_SPRG2,r4
-	lwz	r4,SL_SPRG3(r11)
-	mtspr	SPRN_SPRG3,r4
-	lwz	r4,SL_SPRG4(r11)
-	mtspr	SPRN_SPRG4,r4
-	lwz	r4,SL_SPRG5(r11)
-	mtspr	SPRN_SPRG5,r4
-	lwz	r4,SL_SPRG6(r11)
-	mtspr	SPRN_SPRG6,r4
-	lwz	r4,SL_SPRG7(r11)
-	mtspr	SPRN_SPRG7,r4
-
-	/* restore the MSR */
-	lwz	r3,SL_MSR(r11)
-	mtmsr	r3
-
-	/* Restore TB */
-	li	r3,0
-	mtspr	SPRN_TBWL,r3
-	lwz	r3,SL_TBU(r11)
-	lwz	r4,SL_TBL(r11)
-	mtspr	SPRN_TBWU,r3
-	mtspr	SPRN_TBWL,r4
-
-	/* Restore TCR and clear any pending bits in TSR. */
-	lwz	r4,SL_TCR(r11)
-	mtspr	SPRN_TCR,r4
-	lis	r4, (TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS)@h
-	mtspr	SPRN_TSR,r4
-
-	/* Kick decrementer */
-	li	r0,1
-	mtdec	r0
-
-	/* Restore the callee-saved registers and return */
-	lwz	r0,SL_CR(r11)
-	mtcr	r0
-	lwz	r2,SL_R2(r11)
-	lmw	r12,SL_R12(r11)
-	lwz	r1,SL_SP(r11)
-	lwz	r0,SL_LR(r11)
-	mtlr	r0
+	lis	r3, core_registers_save_area at h
+	ori	r3, r3, core_registers_save_area at l
+
+	/* Restore base register */
+	li	r4, 0
+	bl	fsl_cpu_state_restore
 
 	li	r3,0
 	blr
-- 
1.8.5