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| author | iabdalkader <i.abdalkader@gmail.com> | 2024-07-20 10:37:26 +0300 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2024-08-08 18:02:13 +1000 |
| commit | 9a48ce3051744fac20762199d67ffc380c1de1f6 (patch) | |
| tree | 1a277340e6046286fbb4f6049a6c3002c591f54f | |
| parent | bc7e39d549678e3c51fa667ad2097f6eb2da6987 (diff) | |
stm32/mpu: Define the last used MPU region number.
The reason for this change is that it makes allows custom code, that needs
to use an MPU region, to find a free one by using this macro or starting
from the max number and downwards, without concern that it might change in
the future.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
| -rw-r--r-- | ports/stm32/mpu.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/ports/stm32/mpu.h b/ports/stm32/mpu.h index 5ef146618..a87c04a58 100644 --- a/ports/stm32/mpu.h +++ b/ports/stm32/mpu.h @@ -36,12 +36,18 @@ #define MPU_REGION_QSPI3 (MPU_REGION_NUMBER3) #define MPU_REGION_SDRAM1 (MPU_REGION_NUMBER4) #define MPU_REGION_SDRAM2 (MPU_REGION_NUMBER5) -#define MPU_REGION_OPENAMP (MPU_REGION_NUMBER15) // Only relevant on CPUs with D-Cache, must be higher priority than SDRAM #define MPU_REGION_DMA_UNCACHED_1 (MPU_REGION_NUMBER6) #define MPU_REGION_DMA_UNCACHED_2 (MPU_REGION_NUMBER7) +#ifdef MPU_REGION_NUMBER8 +#define MPU_REGION_OPENAMP (MPU_REGION_NUMBER8) +#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER8) +#else +#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER7) +#endif + // Attribute value to disable a region entirely, remove it from the MPU // (i.e. the MPU_REGION_ENABLE bit is unset.) #define MPU_CONFIG_DISABLE 0 @@ -135,6 +141,7 @@ static inline void mpu_config_end(uint32_t irq_state) { #define MPU_REGION_SIG (MPU_REGION_NUMBER0) #define MPU_REGION_ETH (MPU_REGION_NUMBER1) +#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER1) #define ST_DEVICE_SIGNATURE_BASE (0x08fff800) #define ST_DEVICE_SIGNATURE_LIMIT (0x08ffffff) |