mirror of
https://github.com/Next-Flip/Momentum-Firmware.git
synced 2026-04-24 03:29:57 -07:00
0bc400a3ae
* Remove unnecessary checks * Sublime: never insert missing headers * Cleanup furi defines use * Cleanup startup. Cleanup linker scripts. Explicitly define all interrupts hadlers, including uninmplemented one. * Startup routine in C * Drop assembler startup * Move linker defines to stm32wb55_linker.h, cleanup naming, unify usage. Mpu: protect last 32b of main stack. Document various obscure things. * Move furi_hal_switch documentation to appropriate place, use 0x0 for updater jump. * UnitTests: move all temporary test files into tmp folder --------- Co-authored-by: SG <who.just.the.doctor@gmail.com>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
#include <furi_hal_mpu.h>
|
|
#include <stm32wbxx_ll_cortex.h>
|
|
|
|
#include <stm32wb55_linker.h>
|
|
|
|
#define FURI_HAL_MPU_ATTRIBUTES \
|
|
(LL_MPU_ACCESS_BUFFERABLE | LL_MPU_ACCESS_CACHEABLE | LL_MPU_ACCESS_SHAREABLE | \
|
|
LL_MPU_TEX_LEVEL1 | LL_MPU_INSTRUCTION_ACCESS_ENABLE)
|
|
|
|
#define FURI_HAL_MPU_STACK_PROTECT_REGION FuriHalMPURegionSize32B
|
|
|
|
void furi_hal_mpu_init(void) {
|
|
furi_hal_mpu_enable();
|
|
|
|
// NULL pointer dereference protection
|
|
furi_hal_mpu_protect_no_access(FuriHalMpuRegionNULL, 0x00, FuriHalMPURegionSize1MB);
|
|
furi_hal_mpu_protect_no_access(
|
|
FuriHalMpuRegionMainStack,
|
|
(uint32_t)(&_stack_end - &_stack_size),
|
|
FuriHalMPURegionSize32B);
|
|
}
|
|
|
|
void furi_hal_mpu_enable(void) {
|
|
LL_MPU_Enable(LL_MPU_CTRL_PRIVILEGED_DEFAULT);
|
|
}
|
|
|
|
void furi_hal_mpu_disable(void) {
|
|
LL_MPU_Disable();
|
|
}
|
|
|
|
void furi_hal_mpu_protect_no_access(
|
|
FuriHalMpuRegion region,
|
|
uint32_t address,
|
|
FuriHalMPURegionSize size) {
|
|
uint32_t size_ll = size;
|
|
size_ll = size_ll << MPU_RASR_SIZE_Pos;
|
|
|
|
furi_hal_mpu_disable();
|
|
LL_MPU_ConfigRegion(
|
|
region, 0x00, address, FURI_HAL_MPU_ATTRIBUTES | LL_MPU_REGION_NO_ACCESS | size_ll);
|
|
furi_hal_mpu_enable();
|
|
}
|
|
|
|
void furi_hal_mpu_protect_read_only(
|
|
FuriHalMpuRegion region,
|
|
uint32_t address,
|
|
FuriHalMPURegionSize size) {
|
|
uint32_t size_ll = size;
|
|
size_ll = size_ll << MPU_RASR_SIZE_Pos;
|
|
|
|
furi_hal_mpu_disable();
|
|
LL_MPU_ConfigRegion(
|
|
region, 0x00, address, FURI_HAL_MPU_ATTRIBUTES | LL_MPU_REGION_PRIV_RO_URO | size_ll);
|
|
furi_hal_mpu_enable();
|
|
}
|
|
|
|
void furi_hal_mpu_protect_disable(FuriHalMpuRegion region) {
|
|
furi_hal_mpu_disable();
|
|
LL_MPU_DisableRegion(region);
|
|
furi_hal_mpu_enable();
|
|
}
|
|
|
|
void furi_hal_mpu_set_stack_protection(uint32_t* stack) {
|
|
// Protection area address must be aligned to region size
|
|
uint32_t stack_ptr = (uint32_t)stack;
|
|
uint32_t mask = ((1 << (FURI_HAL_MPU_STACK_PROTECT_REGION + 2)) - 1);
|
|
stack_ptr &= ~mask;
|
|
if(stack_ptr < (uint32_t)stack) stack_ptr += (mask + 1);
|
|
|
|
furi_hal_mpu_protect_read_only(
|
|
FuriHalMpuRegionThreadStack, stack_ptr, FURI_HAL_MPU_STACK_PROTECT_REGION);
|
|
} |