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This commit is contained in:
Björn Quentin 2025-01-06 10:16:42 +01:00
parent 3994dc6de3
commit 9b5695ea00
1 changed files with 4 additions and 2 deletions
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esp-hal/src/soc/esp32s3/psram.rs
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@ -168,8 +168,10 @@ pub(crate) fn init_psram(config: PsramConfig) {
const MMU_INVALID: u32 = 1 << 14; const MMU_INVALID: u32 = 1 << 14;
const DR_REG_MMU_TABLE: u32 = 0x600C5000; const DR_REG_MMU_TABLE: u32 = 0x600C5000;
// calculate the PSRAM start address to map - honor the fact there might be // calculate the PSRAM start address to map
// unmapped pages in between // the linker scripts can produce a gap between mapped IROM and DROM segments
// bigger than a flash page - i.e. we will see an unmapped memory slot
// start from the end and find the last mapped flash page
let mmu_table_ptr = DR_REG_MMU_TABLE as *const u32; let mmu_table_ptr = DR_REG_MMU_TABLE as *const u32;
let mut mapped_pages = 0; let mut mapped_pages = 0;
for i in (0..FLASH_MMU_TABLE_SIZE).rev() { for i in (0..FLASH_MMU_TABLE_SIZE).rev() {