diff options
Diffstat (limited to 'arch/arm/mach-tegra/sleep.S')
| -rw-r--r-- | arch/arm/mach-tegra/sleep.S | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S index 5075a9c2379f..11e38f2aaa34 100644 --- a/arch/arm/mach-tegra/sleep.S +++ b/arch/arm/mach-tegra/sleep.S @@ -1,5 +1,5 @@ /* - * Copyright (c) 2010, NVIDIA Corporation. + * Copyright (c) 2010-2011, NVIDIA Corporation. * Copyright (c) 2011, Google, Inc. * * Author: Colin Cross <ccross@android.com> @@ -69,6 +69,9 @@ #define FLOW_CTRL_IRQ_RESUME (1 << 10) #define FLOW_CTRL_FIQ_RESUME (1 << 8) +#define FLOW_CTRL_CSR_INTR_FLAG (1<<15) +#define FLOW_CTRL_CSR_EVENT_FLAG (1<<14) + #define TEGRA_PMC_VIRT (TEGRA_PMC_BASE - IO_APB_PHYS + IO_APB_VIRT) #define TEGRA_ARM_PERIF_VIRT (TEGRA_ARM_PERIF_BASE - IO_CPU_PHYS + IO_CPU_VIRT) #define TEGRA_FLOW_CTRL_VIRT (TEGRA_FLOW_CTRL_BASE - IO_PPSB_PHYS + IO_PPSB_VIRT) @@ -193,25 +196,26 @@ ENDPROC(tegra_cpu_save) * tegra_cpu_wfi * * puts current CPU in clock-gated wfi using the flow controller - * if the state is saved before calling tegra_cpu_wfi, the cpu can go from - * wfi directly to reset * - * corrupts r0-r2 + * corrupts r0-r3 * must be called with MMU on */ ENTRY(tegra_cpu_wfi) cpu_id r0 cpu_to_halt_reg r1, r0 + cpu_to_csr_reg r2, r0 mov32 r0, TEGRA_FLOW_CTRL_VIRT - mov r2, #FLOW_CTRL_WAITEVENT | FLOW_CTRL_JTAG_RESUME - str r2, [r0, r1] @ put flow controller in wait event mode - ldr r2, [r0, r1] - isb + mov r3, #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG + str r3, [r0, r2] @ clear event & interrupt status + mov r3, #FLOW_CTRL_STOP_UNTIL_IRQ | FLOW_CTRL_JTAG_RESUME + str r3, [r0, r1] @ put flow controller in wait irq mode dsb wfi - mov r2, #0 - str r2, [r0, r1] - ldr r2, [r0, r1] + mov r3, #0 + str r3, [r0, r1] @ clear flow controller halt status + mov r3, #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG + str r3, [r0, r2] @ clear event & interrupt status + dsb mov pc, lr ENDPROC(tegra_cpu_wfi) |