diff options
| author | Simon Glass | 2013-06-11 11:14:48 -0700 |
|---|---|---|
| committer | Tom Rini | 2013-06-26 10:18:56 -0400 |
| commit | d0ae31eb0714a8b44dcdb644f8b68dafdbc1c197 (patch) | |
| tree | 4ff4510bdf06010ad4a13a563e6571262aac753c | |
| parent | 35fc84fa1ff51e15ecd3e464dac87eb105ffed30 (diff) | |
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>
| -rw-r--r-- | common/cmd_bootm.c | 19 | ||||
| -rw-r--r-- | include/image.h | 3 |
2 files changed, 19 insertions, 3 deletions
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c index ffca8e263bb..bf14a0e35e1 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; } diff --git a/include/image.h b/include/image.h index 8675a82854a..4415bcf279e 100644 --- a/include/image.h +++ b/include/image.h @@ -328,7 +328,8 @@ typedef struct bootm_headers { #define BOOTM_STATE_OS_CMDLINE (0x00000040) #define BOOTM_STATE_OS_BD_T (0x00000080) #define BOOTM_STATE_OS_PREP (0x00000100) -#define BOOTM_STATE_OS_GO (0x00000200) +#define BOOTM_STATE_OS_FAKE_GO (0x00000200) /* 'Almost' run the OS */ +#define BOOTM_STATE_OS_GO (0x00000400) int state; #ifdef CONFIG_LMB |