---

yaml
---
r: 163441
b: refs/heads/master
c: 309214a
h: refs/heads/master
i:
  163439: a6adf83
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cd7246f0e2747bd2b43d25d0f63f05db182a62c0
+refs/heads/master: 309214af53f030e0664aea011a9f628c5eb9cc2d

trunk/arch/sh/kernel/cpu/shmobile/pm.c

@@ -41,23 +41,11 @@ extern const unsigned int sh_mobile_standby_size;
 
 void sh_mobile_call_standby(unsigned long mode)
 {
-	extern void *vbr_base;
 	void *onchip_mem = (void *)ILRAM_BASE;
-	void (*standby_onchip_mem)(unsigned long) = onchip_mem;
-
-	/* Note: Wake up from sleep may generate exceptions!
-	 * Setup VBR to point to on-chip ram if self-refresh is
-	 * going to be used.
-	 */
-	if (mode & SUSP_SH_SF)
-		asm volatile("ldc %0, vbr" : : "r" (onchip_mem) : "memory");
+	void (*standby_onchip_mem)(unsigned long, unsigned long) = onchip_mem;
 
 	/* Let assembly snippet in on-chip memory handle the rest */
-	standby_onchip_mem(mode);
-
-	/* Put VBR back in System RAM again */
-	if (mode & SUSP_SH_SF)
-		asm volatile("ldc %0, vbr" : : "r" (&vbr_base) : "memory");
+	standby_onchip_mem(mode, ILRAM_BASE);
 }
 
 static int sh_pm_enter(suspend_state_t state)

trunk/arch/sh/kernel/cpu/shmobile/sleep.S

@@ -16,19 +16,52 @@
 #include <asm/asm-offsets.h>
 #include <asm/suspend.h>
 
+/*
+ * Kernel mode register usage, see entry.S:
+ *	k0	scratch
+ *	k1	scratch
+ *	k4	scratch
+ */
+#define k0	r0
+#define k1	r1
+#define k4	r4
+
 /* manage self-refresh and enter standby mode.
  * this code will be copied to on-chip memory and executed from there.
  */
 
 	.balign 	4096,0,4096
 ENTRY(sh_mobile_standby)
+
+	/* save original vbr */
+	stc	vbr, r1
+	mova	saved_vbr, r0
+	mov.l	r1, @r0
+
+	/* point vbr to our on-chip memory page */
+	ldc	r5, vbr
+
+	/* save return address */
+	mova	saved_spc, r0
+	sts	pr, r5
+	mov.l	r5, @r0
+
+	/* save sr */
+	mova	saved_sr, r0
+	stc	sr, r5
+	mov.l	r5, @r0
+
+	/* save mode flags */
+	mova	saved_mode, r0
+	mov.l	r4, @r0
+
+	/* put mode flags in r0 */
 	mov	r4, r0
 
 	tst	#SUSP_SH_SF, r0
 	bt	skip_set_sf
 #ifdef CONFIG_CPU_SUBTYPE_SH7724
 	/* DBSC: put memory in self-refresh mode */
-
 	mov.l	dben_reg, r4
 	mov.l	dben_data0, r1
 	mov.l	r1, @r4
@@ -60,14 +93,6 @@ ENTRY(sh_mobile_standby)
 #endif
 
 skip_set_sf:
-	tst	#SUSP_SH_SLEEP, r0
-	bt	test_standby
-
-	/* set mode to "sleep mode" */
-	bra	do_sleep
-	 mov	#0x00, r1
-
-test_standby:
 	tst	#SUSP_SH_STANDBY, r0
 	bt	test_rstandby
 
@@ -85,77 +110,107 @@ test_rstandby:
 
 test_ustandby:
 	tst	#SUSP_SH_USTANDBY, r0
-	bt	done_sleep
+	bt	force_sleep
 
 	/* set mode to "u-standby mode" */
-	mov	#0x10, r1
+	bra	do_sleep
+	 mov	#0x10, r1
 
-	/* fall-through */
+force_sleep:
+
+	/* set mode to "sleep mode" */
+	mov	#0x00, r1
 
 do_sleep:
 	/* setup and enter selected standby mode */
 	mov.l	5f, r4
 	mov.l	r1, @r4
+again:
 	sleep
+	bra	again
+	 nop
+
+restore_jump_vbr:
+	/* setup spc with return address to c code */
+	mov.l	saved_spc, k0
+	ldc	k0, spc
+
+	/* restore vbr */
+	mov.l	saved_vbr, k0
+	ldc	k0, vbr
+
+	/* setup ssr with saved sr */
+	mov.l	saved_sr, k0
+	ldc	k0, ssr
+
+	/* get mode flags */
+	mov.l	saved_mode, k0
 
 done_sleep:
 	/* reset standby mode to sleep mode */
-	mov.l	5f, r4
-	mov	#0x00, r1
-	mov.l	r1, @r4
+	mov.l	5f, k4
+	mov	#0x00, k1
+	mov.l	k1, @k4
 
-	tst	#SUSP_SH_SF, r0
+	tst	#SUSP_SH_SF, k0
 	bt	skip_restore_sf
 
 #ifdef CONFIG_CPU_SUBTYPE_SH7724
 	/* DBSC: put memory in auto-refresh mode */
+	mov.l	dbrfpdn0_reg, k4
+	mov.l	dbrfpdn0_data0, k1
+	mov.l	k1, @k4
 
-	mov.l	dbrfpdn0_reg, r4
-	mov.l	dbrfpdn0_data0, r1
-	mov.l	r1, @r4
-
-	/* sleep 140 ns */
-	nop
+	nop /* sleep 140 ns */
 	nop
 	nop
 	nop
 
-	mov.l	dbcmdcnt_reg, r4
-	mov.l	dbcmdcnt_data0, r1
-	mov.l	r1, @r4
+	mov.l	dbcmdcnt_reg, k4
+	mov.l	dbcmdcnt_data0, k1
+	mov.l	k1, @k4
 
-	mov.l	dbcmdcnt_reg, r4
-	mov.l	dbcmdcnt_data1, r1
-	mov.l	r1, @r4
+	mov.l	dbcmdcnt_reg, k4
+	mov.l	dbcmdcnt_data1, k1
+	mov.l	k1, @k4
 
-	mov.l	dben_reg, r4
-	mov.l	dben_data1, r1
-	mov.l	r1, @r4
+	mov.l	dben_reg, k4
+	mov.l	dben_data1, k1
+	mov.l	k1, @k4
 
-	mov.l	dbrfpdn0_reg, r4
-	mov.l	dbrfpdn0_data2, r1
-	mov.l	r1, @r4
+	mov.l	dbrfpdn0_reg, k4
+	mov.l	dbrfpdn0_data2, k1
+	mov.l	k1, @k4
 #else
 	/* SBSC: set auto-refresh mode */
-	mov.l	1f, r4
-	mov.l	@r4, r2
-	mov.l   4f, r3
-	and	r3, r2
-	mov.l	r2, @r4
-	mov.l	6f, r4
-	mov.l	7f, r1
-	mov.l	8f, r2
-	mov.l	@r4, r3
-	mov	#-1, r4
-	add	r4, r3
-	or	r2, r3
-	mov.l	r3, @r1
+	mov.l	1f, k4
+	mov.l	@k4, k0
+	mov.l   4f, k1
+	and	k1, k0
+	mov.l	k0, @k4
+	mov.l	6f, k4
+	mov.l	8f, k0
+	mov.l	@k4, k1
+	mov	#-1, k4
+	add	k4, k1
+	or	k1, k0
+	mov.l	7f, k1
+	mov.l	k0, @k1
 #endif
 skip_restore_sf:
-	rts
+	/* jump to vbr vector */
+	mov.l	saved_vbr, k0
+	mov.l	offset_vbr, k4
+	add	k4, k0
+	jmp	@k0
 	 nop
 
 	.balign 4
+saved_mode:	.long	0
+saved_spc:	.long	0
+saved_sr:	.long	0
+saved_vbr:	.long	0
+offset_vbr:	.long	0x600
 #ifdef CONFIG_CPU_SUBTYPE_SH7724
 dben_reg:	.long	0xfd000010 /* DBEN */
 dben_data0:	.long	0
@@ -178,12 +233,12 @@ dbcmdcnt_data1:	.long	4
 7:	.long   0xfe400018 /* RTCNT */
 8:	.long   0xa55a0000
 
+
 /* interrupt vector @ 0x600 */
 	.balign 	0x400,0,0x400
 	.long	0xdeadbeef
 	.balign 	0x200,0,0x200
-	/* sh7722 will end up here in sleep mode */
-	rte
+	bra	restore_jump_vbr
 	 nop
 sh_mobile_standby_end: