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

141 wiersze
3.2 KiB
C

/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "soc/uart_periph.h"
#include "soc/gpio_periph.h"
#include "soc/soc.h"
#include "soc/usb_serial_jtag_struct.h"
#include "hal/usb_serial_jtag_ll.h"
#include "esp_gdbstub_common.h"
#include "sdkconfig.h"
#define UART_NUM CONFIG_ESP_CONSOLE_UART_NUM
#define GDBSTUB_MEM_REGION_COUNT 9
#define UART_REG_FIELD_LEN 0x84
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, hence we skip them
// We shouldn't read the uart registers since it will disturb the debugging via UART,
// so skip UART part of the peripheral registers.
{DR_REG_UART_BASE + UART_REG_FIELD_LEN, 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()
{
}
#if CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG
int esp_gdbstub_getchar()
{
uint8_t c;
//retry the read until we succeed
while (usb_serial_jtag_ll_read_rxfifo(&c, 1)==0) ;
return c;
}
void esp_gdbstub_putchar(int c)
{
uint8_t cc=c;
//retry the write until we succeed
while (usb_serial_jtag_ll_write_txfifo(&cc, 1)<1) ;
}
void esp_gdbstub_flush()
{
usb_serial_jtag_ll_txfifo_flush();
}
#else
//assume UART gdbstub channel
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);
}
void esp_gdbstub_flush()
{
//not needed for uart
}
#endif
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;
}
int esp_gdbstub_writemem(unsigned int addr, unsigned char data)
{
if (!check_inside_valid_region(addr)) {
/* see esp_cpu_configure_region_protection */
return -1;
}
int *i = (int *)(addr & (~3));
if ((addr & 3) == 0) {
*i = (*i & 0xffffff00) | (data << 0);
}
if ((addr & 3) == 1) {
*i = (*i & 0xffff00ff) | (data << 8);
}
if ((addr & 3) == 2) {
*i = (*i & 0xff00ffff) | (data << 16);
}
if ((addr & 3) == 3) {
*i = (*i & 0x00ffffff) | (data << 24);
}
return 0;
}