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>
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@ -36,12 +36,18 @@
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#define MPU_REGION_QSPI3 (MPU_REGION_NUMBER3)
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#define MPU_REGION_SDRAM1 (MPU_REGION_NUMBER4)
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#define MPU_REGION_SDRAM2 (MPU_REGION_NUMBER5)
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#define MPU_REGION_OPENAMP (MPU_REGION_NUMBER15)
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// Only relevant on CPUs with D-Cache, must be higher priority than SDRAM
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#define MPU_REGION_DMA_UNCACHED_1 (MPU_REGION_NUMBER6)
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#define MPU_REGION_DMA_UNCACHED_2 (MPU_REGION_NUMBER7)
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#ifdef MPU_REGION_NUMBER8
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#define MPU_REGION_OPENAMP (MPU_REGION_NUMBER8)
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#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER8)
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#else
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#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER7)
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#endif
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// Attribute value to disable a region entirely, remove it from the MPU
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// (i.e. the MPU_REGION_ENABLE bit is unset.)
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#define MPU_CONFIG_DISABLE 0
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@ -135,6 +141,7 @@ static inline void mpu_config_end(uint32_t irq_state) {
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#define MPU_REGION_SIG (MPU_REGION_NUMBER0)
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#define MPU_REGION_ETH (MPU_REGION_NUMBER1)
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#define MPU_REGION_LAST_USED (MPU_REGION_NUMBER1)
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#define ST_DEVICE_SIGNATURE_BASE (0x08fff800)
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#define ST_DEVICE_SIGNATURE_LIMIT (0x08ffffff)
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