ARM: pm: omap34xx: remove get_*_restore_pointer functions, directly u…

…se entry points

Upon return from off-mode, the ROM code jumps to a restore function
saved in the scratchpad.  Based on SoC revision or errata, this
restore entry point is different.  Current code uses some helper
functions in sleep34xx.S (get_*_restore_pointer) to get the restore
function entry point.

When returning from off-mode, this code is executed from SDRAM, so
there's no reason to use these helper functions when using the SDRAM
entry points directly would work just fine.

This patch uses ENTRY/ENDPROC to create "real" entry points for these
functions, and uses those values directly when writing the scratchpad.

Tested all three entry points
- restore_es3: 3430/n900
- restore_3630: 3630/Zoom3
- restore: 3530/Overo

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-omap2/control.c

@@ -286,14 +286,15 @@ void omap3_save_scratchpad_contents(void)
 	scratchpad_contents.boot_config_ptr = 0x0;
 	if (cpu_is_omap3630())
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(get_omap3630_restore_pointer());
+			virt_to_phys(omap3_restore_3630);
 	else if (omap_rev() != OMAP3430_REV_ES3_0 &&
 					omap_rev() != OMAP3430_REV_ES3_1)
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(get_restore_pointer());
+			virt_to_phys(omap3_restore);
 	else
 		scratchpad_contents.public_restore_ptr =
-			virt_to_phys(get_es3_restore_pointer());
+			virt_to_phys(omap3_restore_es3);
+
 	if (omap_type() == OMAP2_DEVICE_TYPE_GP)
 		scratchpad_contents.secure_ram_restore_ptr = 0x0;
 	else

arch/arm/mach-omap2/control.h

@@ -386,9 +386,9 @@ extern void omap4_ctrl_pad_writel(u32 val, u16 offset);
 
 extern void omap3_save_scratchpad_contents(void);
 extern void omap3_clear_scratchpad_contents(void);
-extern u32 *get_restore_pointer(void);
-extern u32 *get_es3_restore_pointer(void);
-extern u32 *get_omap3630_restore_pointer(void);
+extern void omap3_restore(void);
+extern void omap3_restore_es3(void);
+extern void omap3_restore_3630(void);
 extern u32 omap3_arm_context[128];
 extern void omap3_control_save_context(void);
 extern void omap3_control_restore_context(void);

arch/arm/mach-omap2/sleep34xx.S

@@ -74,46 +74,6 @@
  * API functions
  */
 
-/*
- * The "get_*restore_pointer" functions are used to provide a
- * physical restore address where the ROM code jumps while waking
- * up from MPU OFF/OSWR state.
- * The restore pointer is stored into the scratchpad.
- */
-
-	.text
-/* Function call to get the restore pointer for resume from OFF */
-ENTRY(get_restore_pointer)
-	stmfd	sp!, {lr}	@ save registers on stack
-	adr	r0, restore
-	ldmfd	sp!, {pc}	@ restore regs and return
-ENDPROC(get_restore_pointer)
-	.align
-ENTRY(get_restore_pointer_sz)
-	.word	. - get_restore_pointer
-
-	.text
-/* Function call to get the restore pointer for 3630 resume from OFF */
-ENTRY(get_omap3630_restore_pointer)
-	stmfd	sp!, {lr}	@ save registers on stack
-	adr	r0, restore_3630
-	ldmfd	sp!, {pc}	@ restore regs and return
-ENDPROC(get_omap3630_restore_pointer)
-	.align
-ENTRY(get_omap3630_restore_pointer_sz)
-	.word	. - get_omap3630_restore_pointer
-
-	.text
-/* Function call to get the restore pointer for ES3 to resume from OFF */
-ENTRY(get_es3_restore_pointer)
-	stmfd	sp!, {lr}	@ save registers on stack
-	adr	r0, restore_es3
-	ldmfd	sp!, {pc}	@ restore regs and return
-ENDPROC(get_es3_restore_pointer)
-	.align
-ENTRY(get_es3_restore_pointer_sz)
-	.word	. - get_es3_restore_pointer
-
 	.text
 /*
  * L2 cache needs to be toggled for stable OFF mode functionality on 3630.
@@ -316,12 +276,12 @@ omap3_do_wfi:
  *  restore_3630: applies to 36xx
  *  restore: common code for 3xxx
  */
-restore_es3:
+ENTRY(omap3_restore_es3)
 	ldr	r5, pm_prepwstst_core_p
 	ldr	r4, [r5]
 	and	r4, r4, #0x3
 	cmp	r4, #0x0	@ Check if previous power state of CORE is OFF
-	bne	restore
+	bne	omap3_restore
 	adr	r0, es3_sdrc_fix
 	ldr	r1, sram_base
 	ldr	r2, es3_sdrc_fix_sz
@@ -333,22 +293,24 @@ copy_to_sram:
 	bne	copy_to_sram
 	ldr	r1, sram_base
 	blx	r1
-	b	restore
+	b	omap3_restore
+ENDPROC(omap3_restore_es3)
 
-restore_3630:
+ENTRY(omap3_restore_3630)
 	ldr	r1, pm_prepwstst_core_p
 	ldr	r2, [r1]
 	and	r2, r2, #0x3
 	cmp	r2, #0x0	@ Check if previous power state of CORE is OFF
-	bne	restore
+	bne	omap3_restore
 	/* Disable RTA before giving control */
 	ldr	r1, control_mem_rta
 	mov	r2, #OMAP36XX_RTA_DISABLE
 	str	r2, [r1]
+ENDPROC(omap3_restore_3630)
 
 	/* Fall through to common code for the remaining logic */
 
-restore:
+ENTRY(omap3_restore)
 	/*
 	 * Read the pwstctrl register to check the reason for mpu reset.
 	 * This tells us what was lost.
@@ -438,6 +400,7 @@ skipl2reen:
 
 	/* Now branch to the common CPU resume function */
 	b	cpu_resume
+ENDPROC(omap3_restore)
 
 	.ltorg