cepetr
7 months ago
committed by
TychoVrahe
parent
353095ae95
commit
c4c571d837
@ -1,19 +0,0 @@
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#ifndef BOOT_INTERNAL_H
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#define BOOT_INTERNAL_H
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#include <boot_args.h>
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#include <stdint.h>
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// The 'g_boot_command' variable stores the 'command' passed to the
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// function 'svc_reboot_to_bootloader()'. It may be one of the
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// 'BOOT_COMMAND_xxx' values defined in the enumeration, or it could
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// be any other value that should be treated as a non-special action,
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// in which case the bootloader should behave as if the device was
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// just powered up. The variable is set before the main() is called.
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extern boot_command_t g_boot_command;
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// The 'g_boot_args' array stores extra arguments passed
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// function 'svc_reboot_to_bootloader()'
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extern uint8_t g_boot_args[BOOT_ARGS_SIZE];
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#endif // BOOT_INTERNAL_H
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@ -0,0 +1,44 @@
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#include "../boot_args.h"
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#include <common.h>
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#include <string.h>
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// The 'g_boot_command_shadow' shadows a real boot command passed
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// to the bootloader.
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// 1. In the bootloader, its value is set in the startup code.
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// 2. In the firmware it holds command for the next boot and it is used
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// when svc_reboot_to_bootloader() is called
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boot_command_t g_boot_command_shadow;
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#ifdef STM32U5
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// The 'g_boot_command' is persistent variable that holds the 'command'
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// for the next reboot/jump to the bootloader. Its value is set to
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// g_boot_command_shadow when 'svc_reboot_to_bootloader()' is called.
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boot_command_t __attribute__((section(".boot_command"))) g_boot_command;
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#endif
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// The 'g_boot_args' is persistent array that stores extra arguments passed
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// to the function bootargs_set.
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static boot_args_t __attribute__((section(".boot_args"))) g_boot_args;
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void bootargs_set(boot_command_t command, const void* args, size_t args_size) {
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// save boot command
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g_boot_command_shadow = command;
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size_t copy_size = 0;
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// copy arguments up to BOOT_ARGS_MAX_SIZE
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if (args != NULL && args_size > 0) {
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copy_size = MIN(args_size, BOOT_ARGS_MAX_SIZE);
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memcpy(&g_boot_args.raw[0], args, copy_size);
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}
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// clear rest of boot_args array
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size_t clear_size = BOOT_ARGS_MAX_SIZE - copy_size;
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if (clear_size > 0) {
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memset(&g_boot_args.raw[copy_size], 0, clear_size);
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}
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}
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boot_command_t bootargs_get_command() { return g_boot_command_shadow; }
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const boot_args_t* bootargs_get_args() { return &g_boot_args; }
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@ -0,0 +1 @@
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../stm32f4/boot_args.c
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@ -0,0 +1,44 @@
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#include "../boot_args.h"
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#include <common.h>
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#include <string.h>
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// The 'g_boot_command_shadow' variable stores the 'command' for the next
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// reboot/jumping to the bootloadeer. It may be one of the
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// 'BOOT_COMMAND_xxx' values defined in the enumeration, or it could
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// be any other value that should be treated as a non-special action,
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// in which case the bootloader should behave as if the device was
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// just powered up.
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static boot_command_t g_boot_command_shadow;
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// The 'g_boot_args' array stores extra arguments passed
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// function boot_args. It sits at section that persists jump to the bootloader.
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static boot_args_t g_boot_args;
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void bootargs_set(boot_command_t command, const void* args, size_t args_size) {
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// save boot command
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g_boot_command_shadow = command;
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size_t copy_size = 0;
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// copy arguments up to BOOT_ARGS_MAX_SIZE
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if (args != NULL && args_size > 0) {
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copy_size = MIN(args_size, BOOT_ARGS_MAX_SIZE);
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memcpy(&g_boot_args.raw[0], args, copy_size);
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}
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// clear rest of boot_args array
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size_t clear_size = BOOT_ARGS_MAX_SIZE - copy_size;
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if (clear_size > 0) {
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memset(&g_boot_args.raw[copy_size], 0, clear_size);
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}
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}
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void bootargs_clear() {
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g_boot_command_shadow = BOOT_COMMAND_NONE;
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memset(&g_boot_args, 0, sizeof(g_boot_args));
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}
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boot_command_t bootargs_get_command() { return g_boot_command_shadow; }
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const boot_args_t* bootargs_get_args() { return &g_boot_args; }
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