[PATCH v1 3/5] ARM: tegra: Setup L2 cache using Trusted Foundations firmware

[Dmitry Osipenko]

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 <dig...@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