[PATCH v3 4/8] ARM: tegra: Setup L2 cache using Trusted Foundations firmware

Dmitry Osipenko
2018-08-30T18:05:31Z

On Tegra30 L2 cache should 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 | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index f9587be48235..67d8ae60ac67 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 +71,18 @@ 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_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();
}

--
2.18.0