diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-30 08:45:49 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-06-30 08:47:35 +0100 |
| commit | cbe263497def23befb6f475977661bae5d1f82e4 (patch) | |
| tree | 61d94af049ab285f0067c4a8e8a92c5763f1bd6f /arch | |
| parent | 46e130d298a384b677426e19faec311749ff2677 (diff) | |
ARM: pm: omap3: move saving of the auxiliary control registers to C
Move the saving of the auxiliary control registers into C; there's
no need for this to be in assembly code. This results in less
assembly code to deal with in OMAP.
Kevin tested full-chip retention and off on 3430/n900, 3530/Overo and
3630/Zoom3.
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/pm.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 19 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/sleep34xx.S | 12 |
3 files changed, 21 insertions, 12 deletions
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index a4ec213e30c..04ee5664612 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -97,7 +97,7 @@ extern void omap24xx_cpu_suspend(u32 dll_ctrl, void __iomem *sdrc_dlla_ctrl, extern unsigned int omap24xx_cpu_suspend_sz; /* 3xxx */ -extern void omap34xx_cpu_suspend(u32 *addr, int save_state); +extern void omap34xx_cpu_suspend(int save_state); /* omap3_do_wfi function pointer and size, for copy to SRAM */ extern void omap3_do_wfi(void); diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index e1c79bae767..7238a63e24e 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -306,9 +306,24 @@ static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id) return IRQ_HANDLED; } +static void omap34xx_save_context(u32 *save) +{ + u32 val; + + /* Read Auxiliary Control Register */ + asm("mrc p15, 0, %0, c1, c0, 1" : "=r" (val)); + *save++ = 1; + *save++ = val; + + /* Read L2 AUX ctrl register */ + asm("mrc p15, 1, %0, c9, c0, 2" : "=r" (val)); + *save++ = 1; + *save++ = val; +} + static void omap34xx_do_sram_idle(unsigned long save_state) { - omap34xx_cpu_suspend(omap3_arm_context, save_state); + omap34xx_cpu_suspend(save_state); } void omap_sram_idle(void) @@ -408,6 +423,8 @@ void omap_sram_idle(void) * get saved. The rest is placed on the stack, and restored * from there before resuming. */ + if (save_state) + omap34xx_save_context(omap3_arm_context); if (save_state == 1 || save_state == 3) cpu_suspend(save_state, omap34xx_do_sram_idle); else diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 17dbc5af691..f2ea1bd1c69 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -152,8 +152,7 @@ ENTRY(omap34xx_cpu_suspend) stmfd sp!, {r4 - r11, lr} @ save registers on stack /* - * r0 contains CPU context save/restore pointer in sdram - * r1 contains information about saving context: + * r0 contains information about saving context: * 0 - No context lost * 1 - Only L1 and logic lost * 2 - Only L2 lost (Even L1 is retained we clean it along with L2) @@ -166,19 +165,12 @@ ENTRY(omap34xx_cpu_suspend) */ ldr r4, omap3_do_wfi_sram_addr ldr r5, [r4] - cmp r1, #0x0 @ If no context save required, + cmp r0, #0x0 @ If no context save required, bxeq r5 @ jump to the WFI code in SRAM /* Otherwise fall through to the save context code */ save_context_wfi: - mov r8, r0 @ Store SDRAM address in r8 - mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register - mov r4, #0x1 @ Number of parameters for restore call - stmia r8!, {r4-r5} @ Push parameters for restore call - mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register - stmia r8!, {r4-r5} @ Push parameters for restore call - /* * jump out to kernel flush routine * - reuse that code is better |