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| author | Alexandre Courbot <acourbot@nvidia.com> | 2014-02-07 13:35:05 +0900 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2014-02-18 13:46:46 -0700 |
| commit | b77b6e885c592815f272d70749fb8d391038f97a (patch) | |
| tree | 19c07df03d22f27cb3650dc9a29a242b44d6199a | |
| parent | cd42145cd993fa1a7426d63648fc7e3423fb2e1d (diff) | |
| download | linux-b77b6e885c592815f272d70749fb8d391038f97a.tar.gz linux-b77b6e885c592815f272d70749fb8d391038f97a.tar.bz2 linux-b77b6e885c592815f272d70749fb8d391038f97a.zip | |
ARM: trusted_foundations: implement prepare_idle()
Support the prepare_idle() firmware call, which is necessary to properly
support CPU idling.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
| -rw-r--r-- | arch/arm/firmware/trusted_foundations.c | 20 |
1 files changed, 19 insertions, 1 deletions
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) |