diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/arch-tegra124/mc.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/ap.c | 40 |
2 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-tegra124/mc.h b/arch/arm/include/asm/arch-tegra124/mc.h index 55577327d9..37998a4d60 100644 --- a/arch/arm/include/asm/arch-tegra124/mc.h +++ b/arch/arm/include/asm/arch-tegra124/mc.h @@ -74,6 +74,8 @@ struct mc_ctlr { u32 mc_video_protect_reg_ctrl; /* offset 0x650 */ }; +#define TEGRA_MC_SMMU_CONFIG_ENABLE (1 << 0) + #define TEGRA_MC_VIDEO_PROTECT_REG_WRITE_ACCESS_ENABLED (0 << 0) #define TEGRA_MC_VIDEO_PROTECT_REG_WRITE_ACCESS_DISABLED (1 << 0) diff --git a/arch/arm/mach-tegra/ap.c b/arch/arm/mach-tegra/ap.c index 869a2ed6bc..0b94e8aaf9 100644 --- a/arch/arm/mach-tegra/ap.c +++ b/arch/arm/mach-tegra/ap.c @@ -169,6 +169,43 @@ void protect_secure_section(void) } #endif +#if defined(CONFIG_ARMV7_NONSEC) +static void smmu_flush(struct mc_ctlr *mc) +{ + (void)readl(&mc->mc_smmu_config); +} + +static void smmu_enable(void) +{ + struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE; + u32 value; + + /* + * Enable translation for all clients since access to this register + * is restricted to TrustZone-secured requestors. The kernel will use + * the per-SWGROUP enable bits to enable or disable translations. + */ + writel(0xffffffff, &mc->mc_smmu_translation_enable_0); + writel(0xffffffff, &mc->mc_smmu_translation_enable_1); + writel(0xffffffff, &mc->mc_smmu_translation_enable_2); + writel(0xffffffff, &mc->mc_smmu_translation_enable_3); + + /* + * Enable SMMU globally since access to this register is restricted + * to TrustZone-secured requestors. + */ + value = readl(&mc->mc_smmu_config); + value |= TEGRA_MC_SMMU_CONFIG_ENABLE; + writel(value, &mc->mc_smmu_config); + + smmu_flush(mc); +} +#else +static void smmu_enable(void) +{ +} +#endif + void s_init(void) { /* Init PMC scratch memory */ @@ -179,6 +216,9 @@ void s_init(void) /* init the cache */ config_cache(); + /* enable SMMU */ + smmu_enable(); + /* init vpr */ config_vpr(); } |