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Merge branch 'bugfix/bootloader_iram_overlap' into 'master'

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fix overlap between bootloader and application IRAM ranges

This change moves the action of enabling APP CPU cache into the application startup code.
Therefore we don't need to use IRAM for the final stage of bootloader, and application can use all 0x20000 of IRAM.
This fixes crashes which happened when application used enough of IRAM to overlap with bootloader functions.

See merge request !176
This commit is contained in:
Ivan Grokhotkov 2016-11-07 12:12:31 +08:00
commit 599a65657d
3 changed files with 9 additions and 7 deletions
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9
components/bootloader/src/main/bootloader_start.c
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@ -51,7 +51,7 @@ extern void Cache_Flush(int);
void bootloader_main();
void unpack_load_app(const esp_partition_pos_t *app_node);
void print_flash_info(const esp_image_header_t* pfhdr);
void IRAM_ATTR set_cache_and_start_app(uint32_t drom_addr,
void set_cache_and_start_app(uint32_t drom_addr,
uint32_t drom_load_addr,
uint32_t drom_size,
uint32_t irom_addr,
@ -445,7 +445,7 @@ void unpack_load_app(const esp_partition_pos_t* partition)
image_header.entry_addr);
}
void IRAM_ATTR set_cache_and_start_app(
void set_cache_and_start_app(
uint32_t drom_addr,
uint32_t drom_load_addr,
uint32_t drom_size,
@ -456,9 +456,7 @@ void IRAM_ATTR set_cache_and_start_app(
{
ESP_LOGD(TAG, "configure drom and irom and start");
Cache_Read_Disable( 0 );
Cache_Read_Disable( 1 );
Cache_Flush( 0 );
Cache_Flush( 1 );
uint32_t drom_page_count = (drom_size + 64*1024 - 1) / (64*1024); // round up to 64k
ESP_LOGV(TAG, "d mmu set paddr=%08x vaddr=%08x size=%d n=%d", drom_addr & 0xffff0000, drom_load_addr & 0xffff0000, drom_size, drom_page_count );
int rc = cache_flash_mmu_set( 0, 0, drom_load_addr & 0xffff0000, drom_addr & 0xffff0000, 64, drom_page_count );
@ -474,7 +472,8 @@ void IRAM_ATTR set_cache_and_start_app(
REG_CLR_BIT( DPORT_PRO_CACHE_CTRL1_REG, (DPORT_PRO_CACHE_MASK_IRAM0) | (DPORT_PRO_CACHE_MASK_IRAM1 & 0) | (DPORT_PRO_CACHE_MASK_IROM0 & 0) | DPORT_PRO_CACHE_MASK_DROM0 | DPORT_PRO_CACHE_MASK_DRAM1 );
REG_CLR_BIT( DPORT_APP_CACHE_CTRL1_REG, (DPORT_APP_CACHE_MASK_IRAM0) | (DPORT_APP_CACHE_MASK_IRAM1 & 0) | (DPORT_APP_CACHE_MASK_IROM0 & 0) | DPORT_APP_CACHE_MASK_DROM0 | DPORT_APP_CACHE_MASK_DRAM1 );
Cache_Read_Enable( 0 );
Cache_Read_Enable( 1 );
// Application will need to do Cache_Flush(1) and Cache_Read_Enable(1)
ESP_LOGD(TAG, "start: 0x%08x", entry_addr);
typedef void (*entry_t)(void);

2
components/bootloader/src/main/esp32.bootloader.ld
View File

@ -15,7 +15,7 @@ MEMORY
of the various regions. The 'data access port' dram/drom regions map to the same iram/irom regions but
are connected to the data port of the CPU and eg allow bytewise access. */
dport0_seg (RW) : org = 0x3FF00000, len = 0x10 /* IO */
iram_seg (RWX) : org = 0x40098000, len = 0x1000
iram_seg (RWX) : org = 0x40080000, len = 0x400 /* 1k of IRAM used by bootloader functions which need to flush/enable APP CPU cache */
iram_pool_1_seg (RWX) : org = 0x40078000, len = 0x8000 /* IRAM POOL1, used for APP CPU cache. We can abuse it in bootloader because APP CPU is still held in reset, until we enable APP CPU cache */
dram_seg (RW) : org = 0x3FFC0000, len = 0x20000 /* Shared RAM, minus rom bss/data/stack.*/
}

5
components/esp32/cpu_start.c
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@ -20,6 +20,7 @@
#include "rom/ets_sys.h"
#include "rom/uart.h"
#include "rom/rtc.h"
#include "rom/cache.h"
#include "soc/cpu.h"
#include "soc/dport_reg.h"
@ -110,7 +111,9 @@ void IRAM_ATTR call_start_cpu0()
#if !CONFIG_FREERTOS_UNICORE
ESP_EARLY_LOGI(TAG, "Starting app cpu, entry point is %p", call_start_cpu1);
//Flush and enable icache for APP CPU
Cache_Flush(1);
Cache_Read_Enable(1);
//Un-stall the app cpu; the panic handler may have stalled it.
CLEAR_PERI_REG_MASK(RTC_CNTL_SW_CPU_STALL_REG, RTC_CNTL_SW_STALL_APPCPU_C1_M);
CLEAR_PERI_REG_MASK(RTC_CNTL_OPTIONS0_REG, RTC_CNTL_SW_STALL_APPCPU_C0_M);