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fix(esp_psram): Add XIP PSRAM alignment gaps in heap only if PSRAM protection is enabled

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This commit is contained in:
harshal.patil
2025-05-05 10:49:04 +05:30
parent 29f7654c2b
commit 5e15adfae9
2 changed files with 15 additions and 6 deletions
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5
components/esp_psram/esp_psram.c
View File

@ -411,6 +411,9 @@ esp_err_t esp_psram_extram_add_to_heap_allocator(void)
ESP_EARLY_LOGI(TAG, "Adding pool of %dK of PSRAM memory to heap allocator",
(s_psram_ctx.regions_to_heap[PSRAM_MEM_8BIT_ALIGNED].size + s_psram_ctx.regions_to_heap[PSRAM_MEM_32BIT_ALIGNED].size) / 1024);
// To allow using the page alignment gaps created while mapping the flash segments,
// the alignment gaps must be configured with correct memory protection configurations.
#if CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
// Here, SOC_MMU_DI_VADDR_SHARED is necessary because, for the targets that have separate data and instruction virtual address spaces,
// the SPIRAM gap created due to the alignment needed while placing the instruction segment in the instruction virtual address space
// cannot be added in heap because the region cannot be configured with write permissions.
@ -436,6 +439,8 @@ esp_err_t esp_psram_extram_add_to_heap_allocator(void)
}
}
#endif /* CONFIG_SPIRAM_RODATA */
#endif /* CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION */
return ESP_OK;
}

16
components/esp_system/ld/esp32p4/sections.ld.in
View File

@ -295,10 +295,12 @@ SECTIONS
*/
. += _esp_flash_mmap_prefetch_pad_size;
#if CONFIG_SPIRAM_FETCH_INSTRUCTIONS
/* Align the end of flash text region as per PMP granularity */
#if CONFIG_SPIRAM_FETCH_INSTRUCTIONS && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
/* Align the end of flash text region as per PMP granularity to allow using the
* page alignment gap created while mapping the flash region into the PSRAM memory.
*/
. = ALIGN(_esp_pmp_align_size);
#endif // CONFIG_SPIRAM_FETCH_INSTRUCTIONS
#endif // CONFIG_SPIRAM_FETCH_INSTRUCTIONS && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
_text_end = ABSOLUTE(.);
/**
@ -450,10 +452,12 @@ SECTIONS
. = ALIGN(ALIGNOF(.flash.tbss));
#if CONFIG_SPIRAM_RODATA
/* Align the end of flash rodata region as per PMP granularity */
#if CONFIG_SPIRAM_RODATA && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
/* Align the end of flash rodata region as per PMP granularity to allow using the
* page alignment gap created while mapping the flash region into the PSRAM memory.
*/
. = ALIGN(_esp_pmp_align_size);
#endif // CONFIG_SPIRAM_RODATA
#endif // CONFIG_SPIRAM_RODATA && CONFIG_SPIRAM_PRE_CONFIGURE_MEMORY_PROTECTION
_thread_local_data_end = ABSOLUTE(.);
} > rodata_seg_low