/*******************************************************************************
* Initialize the TrustZone Controller. Configure Region 0 with Secure RW access
* and allow Non-Secure masters full access.
******************************************************************************/
static void init_tzc400(void)
{
unsigned long long region_base, region_top;
unsigned long long ddr_base = STM32MP_DDR_BASE;
unsigned long long ddr_size = (unsigned long long)dt_get_ddr_size();
unsigned long long ddr_top = ddr_base + (ddr_size - 1U);
tzc400_init(STM32MP1_TZC_BASE);
tzc400_disable_filters();
#ifdef AARCH32_SP_OPTEE
/*
* Region 1 set to cover all non-secure DRAM at 0xC000_0000. Apply the
* same configuration to all filters in the TZC.
*/
region_base = ddr_base;
region_top = ddr_top - STM32MP_DDR_S_SIZE - STM32MP_DDR_SHMEM_SIZE;
tzc400_configure_region(STM32MP1_FILTER_BIT_ALL, 1,
region_base,
region_top,
TZC_REGION_S_NONE,
TZC_REGION_NSEC_ALL_ACCESS_RDWR);
/* Region 2 set to cover all secure DRAM. */
region_base = region_top + 1U;
region_top = ddr_top - STM32MP_DDR_SHMEM_SIZE;
tzc400_configure_region(STM32MP1_FILTER_BIT_ALL, 2,
region_base,
region_top,
TZC_REGION_S_RDWR,
0);
/* Region 3 set to cover non-secure shared memory DRAM. */
region_base = region_top + 1U;
region_top = ddr_top;
tzc400_configure_region(STM32MP1_FILTER_BIT_ALL, 3,
region_base,
region_top,
TZC_REGION_S_NONE,
TZC_REGION_NSEC_ALL_ACCESS_RDWR);
#else
/*
* Region 1 set to cover all DRAM at 0xC000_0000. Apply the
* same configuration to all filters in the TZC.
*/
region_base = ddr_base;
region_top = ddr_top;
tzc400_configure_region(STM32MP1_FILTER_BIT_ALL, 1,
region_base,
region_top,
TZC_REGION_S_NONE,
TZC_REGION_NSEC_ALL_ACCESS_RDWR);
#endif
/* Raise an exception if a NS device tries to access secure memory */
tzc400_set_action(TZC_ACTION_ERR);
tzc400_enable_filters();
}
/*******************************************************************************
* Initialize the TrustZone Controller for ARM standard platforms.
* Configure:
* - Region 0 with no access;
* - Region 1 with secure access only;
* - the remaining DRAM regions access from the given Non-Secure masters.
*
* When booting an EL3 payload, this is simplified: we configure region 0 with
* secure access only and do not enable any other region.
******************************************************************************/
void arm_tzc400_setup(void)
{
INFO("Configuring TrustZone Controller\n");
tzc400_init(PLAT_ARM_TZC_BASE);
/* Disable filters. */
tzc400_disable_filters();
#ifndef EL3_PAYLOAD_BASE
/* Region 0 set to no access by default */
tzc400_configure_region0(TZC_REGION_S_NONE, 0);
/* Region 1 set to cover Secure part of DRAM */
tzc400_configure_region(PLAT_ARM_TZC_FILTERS, 1,
ARM_AP_TZC_DRAM1_BASE, ARM_AP_TZC_DRAM1_END,
TZC_REGION_S_RDWR,
0);
/* Region 2 set to cover Non-Secure access to 1st DRAM address range.
* Apply the same configuration to given filters in the TZC. */
tzc400_configure_region(PLAT_ARM_TZC_FILTERS, 2,
ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END,
ARM_TZC_NS_DRAM_S_ACCESS,
PLAT_ARM_TZC_NS_DEV_ACCESS);
/* Region 3 set to cover Non-Secure access to 2nd DRAM address range */
tzc400_configure_region(PLAT_ARM_TZC_FILTERS, 3,
ARM_DRAM2_BASE, ARM_DRAM2_END,
ARM_TZC_NS_DRAM_S_ACCESS,
PLAT_ARM_TZC_NS_DEV_ACCESS);
#else
/* Allow secure access only to DRAM for EL3 payloads. */
tzc400_configure_region0(TZC_REGION_S_RDWR, 0);
#endif /* EL3_PAYLOAD_BASE */
/*
* Raise an exception if a NS device tries to access secure memory
* TODO: Add interrupt handling support.
*/
tzc400_set_action(TZC_ACTION_ERR);
/* Enable filters. */
tzc400_enable_filters();
}
/*******************************************************************************
* Initialize the TrustZone Controller.
* Early initialization create only one region with full access to secure.
* This setting is used before and during DDR initialization.
******************************************************************************/
static void early_init_tzc400(void)
{
stm32mp_clk_enable(TZC1);
stm32mp_clk_enable(TZC2);
tzc400_init(STM32MP1_TZC_BASE);
tzc400_disable_filters();
/* Region 1 set to cover Non-Secure DRAM at 0xC000_0000 */
tzc400_configure_region(STM32MP1_FILTER_BIT_ALL, 1,
STM32MP_DDR_BASE,
STM32MP_DDR_BASE +
(STM32MP_DDR_MAX_SIZE - 1U),
TZC_REGION_S_NONE,
TZC_REGION_ACCESS_RDWR(STM32MP1_TZC_A7_ID) |
TZC_REGION_ACCESS_RDWR(STM32MP1_TZC_SDMMC_ID));
/* Raise an exception if a NS device tries to access secure memory */
tzc400_set_action(TZC_ACTION_ERR);
tzc400_enable_filters();
}
