diff options
| -rw-r--r-- | arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c b/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c index dd99150fbc2..d75ec99d6a1 100644 --- a/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c +++ b/arch/arm/mach-stm32mp/stm32mp1/stm32mp15x.c @@ -14,6 +14,7 @@ #include <asm/arch/sys_proto.h> #include <dm/device.h> #include <dm/uclass.h> +#include <linux/bitfield.h> /* RCC register */ #define RCC_TZCR (STM32_RCC_BASE + 0x00) @@ -41,6 +42,9 @@ #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114) #define TAMP_CR1 (STM32_TAMP_BASE + 0x00) +#define TAMP_SMCR (STM32_TAMP_BASE + 0x20) +#define TAMP_SMCR_BKPRWDPROT GENMASK(7, 0) +#define TAMP_SMCR_BKPWDPROT GENMASK(23, 16) #define PWR_CR1 (STM32_PWR_BASE + 0x00) #define PWR_MCUCR (STM32_PWR_BASE + 0x14) @@ -136,6 +140,18 @@ static void security_init(void) */ writel(0x0, TAMP_CR1); + /* + * TAMP: Configure non-zero secure protection settings. This is + * checked by BootROM function 35ac on OTP-CLOSED device during + * CPU core 1 release from endless loop. If secure protection + * fields are zero, the core 1 is not released from endless + * loop on second SGI0. + */ + clrsetbits_le32(TAMP_SMCR, + TAMP_SMCR_BKPRWDPROT | TAMP_SMCR_BKPWDPROT, + FIELD_PREP(TAMP_SMCR_BKPRWDPROT, 0x20) | + FIELD_PREP(TAMP_SMCR_BKPWDPROT, 0x20)); + /* GPIOZ: deactivate the security */ writel(BIT(0), RCC_MP_AHB5ENSETR); writel(0x0, GPIOZ_SECCFGR); |