[PATCH v1 3/5] ARM: tegra: Setup L2 cache using Trusted Foundations firmware
From: digetx@gmail.com (Dmitry Osipenko)
Date: 2018-05-20 10:17:06
Also in:
linux-tegra, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
On Tegra20/30 L2 cache must be initialized using firmware call if CPU is running in insecure mode. Initialize L2 cache and setup the outer-cache callbacks in early boot using the firmware API. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- arch/arm/mach-tegra/tegra.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index f9587be48235..590b1cf1a8c4 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c@@ -38,6 +38,7 @@ #include <soc/tegra/fuse.h> #include <soc/tegra/pmc.h> +#include <asm/firmware.h> #include <asm/hardware/cache-l2x0.h> #include <asm/mach/arch.h> #include <asm/mach/time.h>
@@ -70,9 +71,23 @@ u32 tegra_uart_config[3] = { 0, }; +static void __init tegra_trusted_foundations_l2x0_cache_init(void) +{ + if (IS_ENABLED(CONFIG_CACHE_L2X0) && + IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC) && + of_machine_is_compatible("nvidia,tegra20")) + call_firmware_op(l2x0_init); + + if (IS_ENABLED(CONFIG_CACHE_L2X0) && + IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && + of_machine_is_compatible("nvidia,tegra30")) + call_firmware_op(l2x0_init); +} + static void __init tegra_init_early(void) { of_register_trusted_foundations(); + tegra_trusted_foundations_l2x0_cache_init(); tegra_cpu_reset_handler_init(); }
--
2.17.0