esp-idf/components/esp_gdbstub/esp32c3/gdbstub_esp32c3.c

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// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "soc/uart_periph.h"
#include "soc/gpio_periph.h"
#include "soc/soc.h"
#include "esp_gdbstub_common.h"
#include "sdkconfig.h"
#define UART_NUM CONFIG_ESP_CONSOLE_UART_NUM
#define GDBSTUB_MEM_REGION_COUNT 9
typedef struct {
intptr_t lower;
intptr_t upper;
} mem_bound_t;
static const mem_bound_t mem_region_table [GDBSTUB_MEM_REGION_COUNT] =
{
{SOC_DROM_LOW, SOC_DROM_HIGH},
{SOC_IROM_LOW, SOC_IROM_HIGH},
{SOC_IRAM_LOW, SOC_IRAM_HIGH},
{SOC_DRAM_LOW, SOC_DRAM_HIGH},
{SOC_IROM_MASK_LOW, SOC_IROM_MASK_HIGH},
{SOC_DROM_MASK_LOW, SOC_DROM_MASK_HIGH},
{SOC_RTC_IRAM_LOW, SOC_RTC_IRAM_HIGH},
// RTC DRAM and RTC DATA are identical with RTC IRAM
{SOC_PERIPHERAL_LOW, SOC_PERIPHERAL_HIGH},
{SOC_DEBUG_LOW, SOC_DEBUG_HIGH},
};
static inline bool check_inside_valid_region(intptr_t addr)
{
for (size_t i = 0; i < GDBSTUB_MEM_REGION_COUNT; i++) {
if (addr >= mem_region_table[i].lower && addr < mem_region_table[i].upper) {
return true;
}
}
return false;
}
void esp_gdbstub_target_init()
{
}
int esp_gdbstub_getchar()
{
while (REG_GET_FIELD(UART_STATUS_REG(UART_NUM), UART_RXFIFO_CNT) == 0) {
;
}
return REG_READ(UART_FIFO_AHB_REG(UART_NUM));
}
void esp_gdbstub_putchar(int c)
{
while (REG_GET_FIELD(UART_STATUS_REG(UART_NUM), UART_TXFIFO_CNT) >= 126) {
;
}
REG_WRITE(UART_FIFO_AHB_REG(UART_NUM), c);
}
int esp_gdbstub_readmem(intptr_t addr)
{
if (!check_inside_valid_region(addr)) {
/* see esp_cpu_configure_region_protection */
return -1;
}
uint32_t val_aligned = *(uint32_t *)(addr & (~3));
uint32_t shift = (addr & 3) * 8;
return (val_aligned >> shift) & 0xff;
}