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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * The 'exception' command can be used for testing exception handling.
- *
- * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
- */
- #include <common.h>
- #include <command.h>
- static int do_unaligned(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- asm volatile (
- "auipc a1, 0\n"
- "ori a1, a1, 3\n"
- "lw a2, (0)(a1)\n"
- );
- printf("The system supports unaligned access.\n");
- return CMD_RET_SUCCESS;
- }
- static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- asm volatile (".word 0xffffffff\n");
- return CMD_RET_FAILURE;
- }
- static struct cmd_tbl cmd_sub[] = {
- U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned,
- "", ""),
- U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
- "", ""),
- };
- static char exception_help_text[] =
- "<ex>\n"
- " The following exceptions are available:\n"
- " undefined - illegal instruction\n"
- " unaligned - load address misaligned\n"
- ;
- #include <exception.h>
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