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Subject[PATCH v4 4/8] ARM: tegra: Set up L2 cache using Trusted Foundations firmware
Date
On Tegra30 L2 cache should be initialized using firmware call if CPU is
running in insecure mode. Initialize L2 cache and set up the outer-cache
callbacks early during 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();
}

--
2.20.1
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