diff options
Diffstat (limited to 'arch/arm/mach-tegra/headsmp.S')
| -rw-r--r-- | arch/arm/mach-tegra/headsmp.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/headsmp.S b/arch/arm/mach-tegra/headsmp.S index 93f0370cc95b..4a317fae6860 100644 --- a/arch/arm/mach-tegra/headsmp.S +++ b/arch/arm/mach-tegra/headsmp.S @@ -2,6 +2,8 @@ #include <linux/init.h> #include <asm/cache.h> +#include <asm/asm-offsets.h> +#include <asm/hardware/cache-l2x0.h> #include "flowctrl.h" #include "iomap.h" @@ -68,6 +70,64 @@ ENTRY(tegra_secondary_startup) b secondary_startup ENDPROC(tegra_secondary_startup) +#ifdef CONFIG_PM_SLEEP +/* + * tegra_resume + * + * CPU boot vector when restarting the a CPU following + * an LP2 transition. Also branched to by LP0 and LP1 resume after + * re-enabling sdram. + */ +ENTRY(tegra_resume) + bl v7_invalidate_l1 + /* Enable coresight */ + mov32 r0, 0xC5ACCE55 + mcr p14, 0, r0, c7, c12, 6 + + cpu_id r0 + cmp r0, #0 @ CPU0? + bne cpu_resume @ no + +#ifdef CONFIG_ARCH_TEGRA_3x_SOC + /* Are we on Tegra20? */ + mov32 r6, TEGRA_APB_MISC_BASE + ldr r0, [r6, #APB_MISC_GP_HIDREV] + and r0, r0, #0xff00 + cmp r0, #(0x20 << 8) + beq 1f @ Yes + /* Clear the flow controller flags for this CPU. */ + mov32 r2, TEGRA_FLOW_CTRL_BASE + FLOW_CTRL_CPU0_CSR @ CPU0 CSR + ldr r1, [r2] + /* Clear event & intr flag */ + orr r1, r1, \ + #FLOW_CTRL_CSR_INTR_FLAG | FLOW_CTRL_CSR_EVENT_FLAG + movw r0, #0x0FFD @ enable, cluster_switch, immed, & bitmaps + bic r1, r1, r0 + str r1, [r2] +1: +#endif + +#ifdef CONFIG_HAVE_ARM_SCU + /* enable SCU */ + mov32 r0, TEGRA_ARM_PERIF_BASE + ldr r1, [r0] + orr r1, r1, #1 + str r1, [r0] +#endif + + /* L2 cache resume & re-enable */ + l2_cache_resume r0, r1, r2, l2x0_saved_regs_addr + + b cpu_resume +ENDPROC(tegra_resume) +#endif + +#ifdef CONFIG_CACHE_L2X0 + .globl l2x0_saved_regs_addr +l2x0_saved_regs_addr: + .long 0 +#endif + .align L1_CACHE_SHIFT ENTRY(__tegra_cpu_reset_handler_start) @@ -121,6 +181,17 @@ ENTRY(__tegra_cpu_reset_handler) 1: #endif + /* Waking up from LP2? */ + ldr r9, [r12, #RESET_DATA(MASK_LP2)] + tst r9, r11 @ if in_lp2 + beq __is_not_lp2 + ldr lr, [r12, #RESET_DATA(STARTUP_LP2)] + cmp lr, #0 + bleq __die @ no LP2 startup handler + bx lr + +__is_not_lp2: + #ifdef CONFIG_SMP /* * Can only be secondary boot (initial or hotplug) but CPU 0 |