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risc-v/esp32c3: Enable booting from MCUboot bootloader
Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
This commit is contained in:
Gustavo Henrique Nihei
committed by
Xiang Xiao
Xiang Xiao
parent
17ec1d04c0
commit
3c63cb522c
@@ -35,17 +35,83 @@
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#include "esp32c3_lowputc.h"
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#include "esp32c3_start.h"
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#include "esp32c3_wdt.h"
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#include "hardware/esp32c3_cache_memory.h"
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#include "hardware/extmem_reg.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_DEBUG_FEATURES
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# define showprogress(c) riscv_lowputc(c)
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# define showprogress(c) riscv_lowputc(c)
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#else
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# define showprogress(c)
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#endif
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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#define PRIMARY_SLOT_OFFSET CONFIG_ESP32C3_OTA_PRIMARY_SLOT_OFFSET
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#define HDR_ATTR __attribute__((section(".entry_addr"))) \
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__attribute__((used))
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/* Cache MMU block size */
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#define MMU_BLOCK_SIZE 0x00010000 /* 64 KB */
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/* Cache MMU address mask (MMU tables ignore bits which are zero) */
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#define MMU_FLASH_MASK (~(MMU_BLOCK_SIZE - 1))
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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extern uint32_t _image_irom_vma;
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extern uint32_t _image_irom_lma;
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extern uint32_t _image_irom_size;
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extern uint32_t _image_drom_vma;
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extern uint32_t _image_drom_lma;
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extern uint32_t _image_drom_size;
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#endif
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/****************************************************************************
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* ROM Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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extern int ets_printf(const char *fmt, ...);
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extern uint32_t cache_suspend_icache(void);
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extern void cache_resume_icache(uint32_t val);
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extern void cache_invalidate_icache_all(void);
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extern int cache_dbus_mmu_set(uint32_t ext_ram, uint32_t vaddr,
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uint32_t paddr, uint32_t psize, uint32_t num,
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uint32_t fixed);
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extern int cache_ibus_mmu_set(uint32_t ext_ram, uint32_t vaddr,
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uint32_t paddr, uint32_t psize, uint32_t num,
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uint32_t fixed);
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#endif
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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IRAM_ATTR noreturn_function void __start(void);
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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HDR_ATTR static void (*_entry_point)(void) = &__start;
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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@@ -56,6 +122,101 @@ uint8_t g_idlestack[CONFIG_IDLETHREAD_STACKSIZE]
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aligned_data(16) locate_data(".noinit");
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uint32_t g_idle_topstack = ESP32C3_IDLESTACK_TOP;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: calc_mmu_pages
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*
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* Description:
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* Calculate the number of cache pages to map.
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*
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* Input Parameters:
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* size - Size of data to map
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* vaddr - Virtual address where data will be mapped
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*
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* Returned Value:
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* Number of cache MMU pages required to do the mapping.
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*
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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static inline uint32_t calc_mmu_pages(uint32_t size, uint32_t vaddr)
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{
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return (size + (vaddr - (vaddr & MMU_FLASH_MASK)) + MMU_BLOCK_SIZE - 1) /
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MMU_BLOCK_SIZE;
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}
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#endif
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/****************************************************************************
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* Name: map_rom_segments
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*
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* Description:
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* Configure the MMU and Cache peripherals for accessing ROM code and data.
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*
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* Input Parameters:
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* None.
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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static int map_rom_segments(void)
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{
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uint32_t rc = 0;
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uint32_t regval;
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uint32_t drom_lma_aligned;
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uint32_t drom_vma_aligned;
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uint32_t drom_page_count;
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uint32_t irom_lma_aligned;
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uint32_t irom_vma_aligned;
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uint32_t irom_page_count;
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size_t partition_offset = PRIMARY_SLOT_OFFSET;
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uint32_t app_irom_lma = partition_offset + (uint32_t)&_image_irom_lma;
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uint32_t app_irom_size = (uint32_t)&_image_irom_size;
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uint32_t app_irom_vma = (uint32_t)&_image_irom_vma;
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uint32_t app_drom_lma = partition_offset + (uint32_t)&_image_drom_lma;
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uint32_t app_drom_size = (uint32_t)&_image_drom_size;
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uint32_t app_drom_vma = (uint32_t)&_image_drom_vma;
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uint32_t autoload = cache_suspend_icache();
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cache_invalidate_icache_all();
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/* Clear the MMU entries that are already set up, so the new app only has
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* the mappings it creates.
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*/
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for (size_t i = 0; i < FLASH_MMU_TABLE_SIZE; i++)
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{
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FLASH_MMU_TABLE[i] = MMU_TABLE_INVALID_VAL;
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}
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drom_lma_aligned = app_drom_lma & MMU_FLASH_MASK;
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drom_vma_aligned = app_drom_vma & MMU_FLASH_MASK;
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drom_page_count = calc_mmu_pages(app_drom_size, app_drom_vma);
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rc = cache_dbus_mmu_set(MMU_ACCESS_FLASH, drom_vma_aligned,
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drom_lma_aligned, 64, (int)drom_page_count, 0);
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irom_lma_aligned = app_irom_lma & MMU_FLASH_MASK;
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irom_vma_aligned = app_irom_vma & MMU_FLASH_MASK;
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irom_page_count = calc_mmu_pages(app_irom_size, app_irom_vma);
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rc |= cache_ibus_mmu_set(MMU_ACCESS_FLASH, irom_vma_aligned,
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irom_lma_aligned, 64, (int)irom_page_count, 0);
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regval = getreg32(EXTMEM_ICACHE_CTRL1_REG);
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regval &= ~(EXTMEM_ICACHE_SHUT_IBUS_M | EXTMEM_ICACHE_SHUT_DBUS_M);
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putreg32(regval, EXTMEM_ICACHE_CTRL1_REG);
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cache_resume_icache(autoload);
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return (int)rc;
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@@ -66,7 +227,14 @@ uint32_t g_idle_topstack = ESP32C3_IDLESTACK_TOP;
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void __esp32c3_start(void)
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{
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uint32_t *dest;
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#ifdef CONFIG_ESP32C3_APP_FORMAT_MCUBOOT
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if (map_rom_segments() != 0)
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{
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ets_printf("Failed to setup XIP, aborting\n");
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while (true);
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}
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#endif
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/* Set CPU frequency */
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@@ -88,7 +256,7 @@ void __esp32c3_start(void)
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* certain that there are no issues with the state of global variables.
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*/
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for (dest = &_sbss; dest < &_ebss; dest++)
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for (uint32_t *dest = &_sbss; dest < &_ebss; dest++)
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{
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*dest = 0;
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}
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