From eeaef5e4305497537bd47308724de39c7d6cbf19 Mon Sep 17 00:00:00 2001 From: Steven Stallion Date: Mon, 10 Jun 2013 01:00:09 -0700 Subject: 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 [trini: Adapt for Simon's changes about correcting argc, no need to bump by 2 now] Signed-off-by: Tom Rini --- common/cmd_bootm.c | 36 +++++++++++++++++++++++++++++------- 1 file changed, 29 insertions(+), 7 deletions(-) (limited to 'common') 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", -- cgit v1.1