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@@ -0,0 +1,61 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * The 'exception' command can be used for testing exception handling.
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+ *
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+ * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
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+ */
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+
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+#include <common.h>
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+#include <command.h>
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+
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+static int do_unaligned(cmd_tbl_t *cmdtp, int flag, int argc,
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+ char * const argv[])
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+{
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+ /*
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+ * The LDRD instruction requires the data source to be four byte aligned
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+ * even if strict alignment fault checking is disabled in the system
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+ * control register.
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+ */
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+ asm volatile (
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+ "MOV r5, sp\n"
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+ "ADD r5, #1\n"
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+ "LDRD r6, r7, [r5]\n");
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+ return CMD_RET_FAILURE;
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+}
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+
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+static int do_breakpoint(cmd_tbl_t *cmdtp, int flag, int argc,
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+ char * const argv[])
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+{
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+ asm volatile ("BKPT #123\n");
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+ return CMD_RET_FAILURE;
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+}
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+
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+static int do_undefined(cmd_tbl_t *cmdtp, int flag, int argc,
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+ char * const argv[])
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+{
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+ /*
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+ * 0xe7f...f. is undefined in ARM mode
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+ * 0xde.. is undefined in Thumb mode
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+ */
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+ asm volatile (".word 0xe7f7defb\n");
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+ return CMD_RET_FAILURE;
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+}
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+
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+static cmd_tbl_t cmd_sub[] = {
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+ U_BOOT_CMD_MKENT(breakpoint, CONFIG_SYS_MAXARGS, 1, do_breakpoint,
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+ "", ""),
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+ U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned,
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+ "", ""),
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+ U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
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+ "", ""),
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+};
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+
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+static char exception_help_text[] =
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+ "<ex>\n"
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+ " The following exceptions are available:\n"
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+ " breakpoint - prefetch abort\n"
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+ " unaligned - data abort\n"
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+ " undefined - undefined instruction\n"
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+ ;
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+
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+#include <exception.h>
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