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authorSimon Glass <sjg@chromium.org>2013-06-11 11:14:48 -0700
committerTom Rini <trini@ti.com>2013-06-26 10:18:56 -0400
commitd0ae31eb0714a8b44dcdb644f8b68dafdbc1c197 (patch)
tree4ff4510bdf06010ad4a13a563e6571262aac753c /common/cmd_bootm.c
parent35fc84fa1ff51e15ecd3e464dac87eb105ffed30 (diff)
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Add a 'fake' go command to the bootm command
For tracing it is useful to run as much of U-Boot as possible so as to get a complete picture. Quite a bit of work happens in bootm, and we don't want to have to stop tracing before bootm starts. Add a way of doing a 'fake' boot of the OS - which does everything up to the point where U-Boot is about to jump to the OS image. This allows tracing to record right until the end. This requires arch support to work. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/cmd_bootm.c')
-rw-r--r--common/cmd_bootm.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index ffca8e2..bf14a0e 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -499,6 +499,7 @@ static cmd_tbl_t cmd_bootm_sub[] = {
U_BOOT_CMD_MKENT(cmdline, 0, 1, (void *)BOOTM_STATE_OS_CMDLINE, "", ""),
U_BOOT_CMD_MKENT(bdt, 0, 1, (void *)BOOTM_STATE_OS_BD_T, "", ""),
U_BOOT_CMD_MKENT(prep, 0, 1, (void *)BOOTM_STATE_OS_PREP, "", ""),
+ U_BOOT_CMD_MKENT(fake, 0, 1, (void *)BOOTM_STATE_OS_FAKE_GO, "", ""),
U_BOOT_CMD_MKENT(go, 0, 1, (void *)BOOTM_STATE_OS_GO, "", ""),
};
@@ -539,6 +540,8 @@ static int boot_selected_os(int argc, char * const argv[], int state,
#endif
arch_preboot_os();
boot_fn(state, argc, argv, images);
+ if (state == BOOTM_STATE_OS_FAKE_GO) /* We expect to return */
+ return 0;
bootstage_error(BOOTSTAGE_ID_BOOT_OS_RETURNED);
#ifdef DEBUG
puts("\n## Control returned to monitor - resetting...\n");
@@ -645,6 +648,17 @@ static int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc,
if (!ret && (states & BOOTM_STATE_OS_PREP))
ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
+#ifdef CONFIG_TRACE
+ /* Pretend to run the OS, then run a user command */
+ if (!ret && (states & BOOTM_STATE_OS_FAKE_GO)) {
+ char *cmd_list = getenv("fakegocmd");
+
+ ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_FAKE_GO,
+ images, boot_fn, &iflag);
+ if (!ret && cmd_list)
+ ret = run_command_list(cmd_list, -1, flag);
+ }
+#endif
/* Now run the OS! We hope this doesn't return */
if (!ret && (states & BOOTM_STATE_OS_GO))
ret = boot_selected_os(argc, argv, BOOTM_STATE_OS_GO,
@@ -754,7 +768,7 @@ int do_bootm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START |
BOOTM_STATE_FINDOS | BOOTM_STATE_FINDOTHER |
BOOTM_STATE_LOADOS | BOOTM_STATE_OS_PREP |
- BOOTM_STATE_OS_GO, &images, 1);
+ BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO, &images, 1);
}
int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd)
@@ -1731,7 +1745,8 @@ int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 1;
ret = do_bootm_states(cmdtp, flag, argc, argv,
- BOOTM_STATE_OS_GO, &images, 1);
+ BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO,
+ &images, 1);
return ret;
}