[PATCH v1 1/5] ARM: trusted_foundations: Implement L2 cache initialization callback
From: digetx@gmail.com (Dmitry Osipenko)
Date: 2018-05-20 10:16:27
Also in:
linux-tegra, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Implement L2 cache initialization firmware callback that should be invoked early in boot to enable cache HW. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- arch/arm/firmware/trusted_foundations.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/arch/arm/firmware/trusted_foundations.c b/arch/arm/firmware/trusted_foundations.c
index 3fb1b5a1dce9..198ce5c75ca0 100644
--- a/arch/arm/firmware/trusted_foundations.c
+++ b/arch/arm/firmware/trusted_foundations.c@@ -18,8 +18,13 @@ #include <linux/init.h> #include <linux/of.h> #include <asm/firmware.h> +#include <asm/outercache.h> #include <asm/trusted_foundations.h> +#define TF_CACHE_MAINT 0xfffff100 + +#define TF_CACHE_INIT 1 + #define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200 #define TF_CPU_PM 0xfffffffc
@@ -63,9 +68,27 @@ static int tf_prepare_idle(void) return 0; } +#ifdef CONFIG_CACHE_L2X0 +static void tf_cache_write_sec(unsigned long val, unsigned int reg) +{ + pr_warn("%s: Ignoring write [0x%x]: 0x%08lx\n", __func__, reg, val); +} + +static int tf_init_cache(void) +{ + outer_cache.write_sec = tf_cache_write_sec; + tf_generic_smc(TF_CACHE_MAINT, TF_CACHE_INIT, 0); + + return 0; +} +#endif /* CONFIG_CACHE_L2X0 */ + static const struct firmware_ops trusted_foundations_ops = { .set_cpu_boot_addr = tf_set_cpu_boot_addr, .prepare_idle = tf_prepare_idle, +#ifdef CONFIG_CACHE_L2X0 + .l2x0_init = tf_init_cache, +#endif }; void register_trusted_foundations(struct trusted_foundations_platform_data *pd)
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2.17.0