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https://github.com/DarkFlippers/unleashed-firmware.git
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ffa3996a5e
* clang-format: AllowShortEnumsOnASingleLine: false * clang-format: InsertNewlineAtEOF: true * clang-format: Standard: c++20 * clang-format: AlignConsecutiveBitFields * clang-format: AlignConsecutiveMacros * clang-format: RemoveParentheses: ReturnStatement * clang-format: RemoveSemicolon: true * Restored RemoveParentheses: Leave, retained general changes for it * formatting: fixed logging TAGs * Formatting update for dev Co-authored-by: あく <alleteam@gmail.com>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
#include <furi_hal_mpu.h>
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#include <stm32wbxx_ll_cortex.h>
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#include <stm32wb55_linker.h>
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#define FURI_HAL_MPU_ATTRIBUTES \
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(LL_MPU_ACCESS_BUFFERABLE | LL_MPU_ACCESS_CACHEABLE | LL_MPU_ACCESS_SHAREABLE | \
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LL_MPU_TEX_LEVEL1 | LL_MPU_INSTRUCTION_ACCESS_ENABLE)
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#define FURI_HAL_MPU_STACK_PROTECT_REGION FuriHalMPURegionSize32B
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void furi_hal_mpu_init(void) {
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furi_hal_mpu_enable();
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// NULL pointer dereference protection
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furi_hal_mpu_protect_no_access(FuriHalMpuRegionNULL, 0x00, FuriHalMPURegionSize1MB);
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furi_hal_mpu_protect_no_access(
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FuriHalMpuRegionMainStack,
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(uint32_t)(&_stack_end - &_stack_size),
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FuriHalMPURegionSize32B);
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}
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void furi_hal_mpu_enable(void) {
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LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
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}
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void furi_hal_mpu_disable(void) {
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LL_MPU_Disable();
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}
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void furi_hal_mpu_protect_no_access(
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FuriHalMpuRegion region,
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uint32_t address,
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FuriHalMPURegionSize size) {
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uint32_t size_ll = size;
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size_ll = size_ll << MPU_RASR_SIZE_Pos;
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furi_hal_mpu_disable();
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LL_MPU_ConfigRegion(
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region, 0x00, address, FURI_HAL_MPU_ATTRIBUTES | LL_MPU_REGION_NO_ACCESS | size_ll);
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furi_hal_mpu_enable();
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}
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void furi_hal_mpu_protect_read_only(
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FuriHalMpuRegion region,
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uint32_t address,
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FuriHalMPURegionSize size) {
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uint32_t size_ll = size;
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size_ll = size_ll << MPU_RASR_SIZE_Pos;
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furi_hal_mpu_disable();
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LL_MPU_ConfigRegion(
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region, 0x00, address, FURI_HAL_MPU_ATTRIBUTES | LL_MPU_REGION_PRIV_RO_URO | size_ll);
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furi_hal_mpu_enable();
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}
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void furi_hal_mpu_protect_disable(FuriHalMpuRegion region) {
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furi_hal_mpu_disable();
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LL_MPU_DisableRegion(region);
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furi_hal_mpu_enable();
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}
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void furi_hal_mpu_set_stack_protection(uint32_t* stack) {
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// Protection area address must be aligned to region size
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uint32_t stack_ptr = (uint32_t)stack;
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uint32_t mask = ((1 << (FURI_HAL_MPU_STACK_PROTECT_REGION + 2)) - 1);
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stack_ptr &= ~mask;
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if(stack_ptr < (uint32_t)stack) stack_ptr += (mask + 1);
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furi_hal_mpu_protect_read_only(
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FuriHalMpuRegionThreadStack, stack_ptr, FURI_HAL_MPU_STACK_PROTECT_REGION);
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}
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