mirror of
https://github.com/andreili/katapult.git
synced 2025-08-24 03:44:06 +02:00
8316d2f0af
Move application_check_valid() in bootentry.c to armcm_boot.c and make the check specific to the ARM cortex-m. On these ARM machines it is easier to validate the application stack address. Also rename jump_to_application() to application_jump(). Also rename flash_read_block() to application_read_flash() and move to armcm_boot.c . Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
// Determine if the bootloader or application should start
|
|
//
|
|
// Copyright (C) 2021 Eric Callahan <arksine.code@gmail.com>
|
|
//
|
|
// This file may be distributed under the terms of the GNU GPLv3 license.
|
|
|
|
#include <string.h> // strlen
|
|
#include "autoconf.h" // CONFIG_*
|
|
#include "board/flash.h" // flash_read_block
|
|
#include "board/gpio.h" // gpio_in_setup
|
|
#include "board/misc.h" // set_bootup_code
|
|
#include "bootentry.h" // bootentry_check
|
|
#include "ctr.h" // DECL_CTR
|
|
#include "sched.h" // udelay
|
|
|
|
#define REQUEST_SIG 0x5984E3FA6CA1589B // Random request sig
|
|
|
|
// Generated by buildcommands.py
|
|
DECL_CTR("DECL_BUTTON " __stringify(CONFIG_BUTTON_PIN));
|
|
extern int32_t button_gpio, button_high, button_pullup;
|
|
|
|
// Check for a bootloader request via double tap of reset button
|
|
static int
|
|
check_button_pressed(void)
|
|
{
|
|
if (!CONFIG_ENABLE_BUTTON)
|
|
return 0;
|
|
struct gpio_in button = gpio_in_setup(button_gpio, button_pullup);
|
|
udelay(10);
|
|
return gpio_in_read(button) == button_high;
|
|
}
|
|
|
|
// Check for a bootloader request via double tap of reset button
|
|
static void
|
|
check_double_reset(void)
|
|
{
|
|
if (!CONFIG_ENABLE_DOUBLE_RESET)
|
|
return;
|
|
// set request signature and delay for two seconds. This enters the bootloader if
|
|
// the reset button is double clicked
|
|
set_bootup_code(REQUEST_SIG);
|
|
udelay(500000);
|
|
set_bootup_code(0);
|
|
// No reset, read the key back out to clear it
|
|
}
|
|
|
|
// Check if bootloader or application should be started
|
|
int
|
|
bootentry_check(void)
|
|
{
|
|
// Enter the bootloader in the following conditions:
|
|
// - The request signature is set in memory (request from app)
|
|
// - No application code is present
|
|
uint64_t bootup_code = get_bootup_code();
|
|
if (bootup_code == REQUEST_SIG || !application_check_valid()
|
|
|| check_button_pressed()) {
|
|
// Start bootloader main loop
|
|
set_bootup_code(0);
|
|
return 1;
|
|
}
|
|
check_double_reset();
|
|
|
|
// jump to app
|
|
return 0;
|
|
}
|