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stm32/sdram: Use MPU helper functions to configure MPU for SDRAM use.

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This commit is contained in:
Damien George
2019-07-03 00:48:19 +10:00
parent f7eb2c72f7
commit eca4115f66
2 changed files with 19 additions and 36 deletions
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14
ports/stm32/mpu.h
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@@ -29,6 +29,8 @@
#if defined(STM32F7) || defined(STM32H7)
#define MPU_REGION_ETH (MPU_REGION_NUMBER0)
#define MPU_REGION_SDRAM1 (MPU_REGION_NUMBER4)
#define MPU_REGION_SDRAM2 (MPU_REGION_NUMBER5)
#define MPU_CONFIG_DISABLE(srd, size) ( \
MPU_INSTRUCTION_ACCESS_DISABLE << MPU_RASR_XN_Pos \
@@ -54,6 +56,18 @@
| MPU_REGION_ENABLE << MPU_RASR_ENABLE_Pos \
)
#define MPU_CONFIG_SDRAM(size) ( \
MPU_INSTRUCTION_ACCESS_ENABLE << MPU_RASR_XN_Pos \
| MPU_REGION_FULL_ACCESS << MPU_RASR_AP_Pos \
| MPU_TEX_LEVEL1 << MPU_RASR_TEX_Pos \
| MPU_ACCESS_NOT_SHAREABLE << MPU_RASR_S_Pos \
| MPU_ACCESS_CACHEABLE << MPU_RASR_C_Pos \
| MPU_ACCESS_BUFFERABLE << MPU_RASR_B_Pos \
| 0x00 << MPU_RASR_SRD_Pos \
| (size) << MPU_RASR_SIZE_Pos \
| MPU_REGION_ENABLE << MPU_RASR_ENABLE_Pos \
)
static inline void mpu_init(void) {
MPU->CTRL = MPU_PRIVILEGED_DEFAULT | MPU_CTRL_ENABLE_Msk;
SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk;