[PATCH v2 5/6] ARM: trusted_foundations: implement prepare_idle()
From: acourbot@nvidia.com (Alexandre Courbot)
Date: 2014-02-07 04:35:57
Also in:
linux-tegra, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Support the prepare_idle() firmware call, which is necessary to properly support CPU idling. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> --- arch/arm/firmware/trusted_foundations.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/arch/arm/firmware/trusted_foundations.c b/arch/arm/firmware/trusted_foundations.c
index ef1e3d8f4af0..3fb1b5a1dce9 100644
--- a/arch/arm/firmware/trusted_foundations.c
+++ b/arch/arm/firmware/trusted_foundations.c@@ -22,6 +22,15 @@ #define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200 +#define TF_CPU_PM 0xfffffffc +#define TF_CPU_PM_S3 0xffffffe3 +#define TF_CPU_PM_S2 0xffffffe6 +#define TF_CPU_PM_S2_NO_MC_CLK 0xffffffe5 +#define TF_CPU_PM_S1 0xffffffe4 +#define TF_CPU_PM_S1_NOFLUSH_L2 0xffffffe7 + +static unsigned long cpu_boot_addr; + static void __naked tf_generic_smc(u32 type, u32 arg1, u32 arg2) { asm volatile(
@@ -41,13 +50,22 @@ static void __naked tf_generic_smc(u32 type, u32 arg1, u32 arg2) static int tf_set_cpu_boot_addr(int cpu, unsigned long boot_addr) { - tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, boot_addr, 0); + cpu_boot_addr = boot_addr; + tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, cpu_boot_addr, 0); + + return 0; +} + +static int tf_prepare_idle(void) +{ + tf_generic_smc(TF_CPU_PM, TF_CPU_PM_S1_NOFLUSH_L2, cpu_boot_addr); return 0; } static const struct firmware_ops trusted_foundations_ops = { .set_cpu_boot_addr = tf_set_cpu_boot_addr, + .prepare_idle = tf_prepare_idle, }; void register_trusted_foundations(struct trusted_foundations_platform_data *pd)
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1.8.5.3