cmd/exception: support ebreak exception on RISC-V
The ebreak instruction should generate a breakpoint exception.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
diff --git a/cmd/riscv/exception.c b/cmd/riscv/exception.c
index 9687cec..7a08061 100644
--- a/cmd/riscv/exception.c
+++ b/cmd/riscv/exception.c
@@ -8,6 +8,13 @@
#include <common.h>
#include <command.h>
+static int do_ebreak(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ asm volatile ("ebreak\n");
+ return CMD_RET_FAILURE;
+}
+
static int do_unaligned(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
@@ -28,6 +35,8 @@
}
static struct cmd_tbl cmd_sub[] = {
+ U_BOOT_CMD_MKENT(ebreak, CONFIG_SYS_MAXARGS, 1, do_ebreak,
+ "", ""),
U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned,
"", ""),
U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
@@ -37,6 +46,7 @@
static char exception_help_text[] =
"<ex>\n"
" The following exceptions are available:\n"
+ " ebreak - breakpoint\n"
" undefined - illegal instruction\n"
" unaligned - load address misaligned\n"
;
diff --git a/doc/usage/exception.rst b/doc/usage/exception.rst
index db1490f..27df88b 100644
--- a/doc/usage/exception.rst
+++ b/doc/usage/exception.rst
@@ -31,6 +31,9 @@
**RISC-V:**
+ ebreak
+ breakpoint exception
+
unaligned
load address misaligned