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| author | Steven Stallion <sstallion@gmail.com> | 2013-06-10 01:00:09 -0700 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-06-26 10:25:22 -0400 |
| commit | eeaef5e4305497537bd47308724de39c7d6cbf19 (patch) | |
| tree | 213aef8f7119b74b9bbf7c4c9a1e0812c6ac26c9 /common | |
| parent | 041bca5ba3adb48750d0a438cb3b1356a0c2e603 (diff) | |
| download | u-boot-imx-eeaef5e4305497537bd47308724de39c7d6cbf19.zip u-boot-imx-eeaef5e4305497537bd47308724de39c7d6cbf19.tar.gz u-boot-imx-eeaef5e4305497537bd47308724de39c7d6cbf19.tar.bz2 | |
cmd_bootm: Add command line arguments to Plan 9
This patch introduces support for command line arguments to Plan 9.
Plan 9 generally dedicates a small region of kernel memory (known
as CONFADDR) for runtime configuration. A new environment variable
named confaddr was introduced to indicate this location when copying
arguments.
Signed-off-by: Steven Stallion <sstallion@gmail.com>
[trini: Adapt for Simon's changes about correcting argc, no need to bump
by 2 now]
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'common')
| -rw-r--r-- | common/cmd_bootm.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c index bf14a0e..ba0bcd4 100644 --- a/common/cmd_bootm.c +++ b/common/cmd_bootm.c @@ -1393,6 +1393,19 @@ static void fixup_silent_linux(void) } #endif /* CONFIG_SILENT_CONSOLE */ +#if defined(CONFIG_BOOTM_NETBSD) || defined(CONFIG_BOOTM_PLAN9) +static void copy_args(char *dest, int argc, char * const argv[], char delim) +{ + int i; + + for (i = 0; i < argc; i++) { + if (i > 0) + *dest++ = delim; + strcpy(dest, argv[i]); + dest += strlen(argv[i]); + } +} +#endif /*******************************************************************/ /* OS booting routines */ @@ -1455,13 +1468,7 @@ static int do_bootm_netbsd(int flag, int argc, char * const argv[], for (i = 0, len = 0; i < argc; i += 1) len += strlen(argv[i]) + 1; cmdline = malloc(len); - - for (i = 0, len = 0; i < argc; i += 1) { - if (i > 0) - cmdline[len++] = ' '; - strcpy(&cmdline[len], argv[i]); - len += strlen(argv[i]); - } + copy_args(cmdline, argc, argv, ' '); } else if ((cmdline = getenv("bootargs")) == NULL) { cmdline = ""; } @@ -1580,6 +1587,7 @@ static int do_bootm_plan9(int flag, int argc, char * const argv[], bootm_headers_t *images) { void (*entry_point)(void); + char *s; if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1; @@ -1591,6 +1599,20 @@ static int do_bootm_plan9(int flag, int argc, char * const argv[], } #endif + /* See README.plan9 */ + s = getenv("confaddr"); + if (s != NULL) { + char *confaddr = (char *)simple_strtoul(s, NULL, 16); + + if (argc > 0) { + copy_args(confaddr, argc, argv, '\n'); + } else { + s = getenv("bootargs"); + if (s != NULL) + strcpy(confaddr, s); + } + } + entry_point = (void (*)(void))images->ep; printf("## Transferring control to Plan 9 (at address %08lx) ...\n", |