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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2008-08-19 15:55:08 +0200
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 17:18:42 +0200
commit860e546c19d88c21819c7f0861c505debd2d6eed (patch)
tree273d21e0610523ae6c783ad0aea5f810d782c539 /arch/mips/txx9
parentMIPS: TXx9: Add prom_getenv (diff)
downloadlinux-860e546c19d88c21819c7f0861c505debd2d6eed.tar.xz
linux-860e546c19d88c21819c7f0861c505debd2d6eed.zip
MIPS: TXx9: Early command-line preprocessing
* Select board by command-line option or firmware environment variable. * Handle "masterclk=" option. * Add boards.h to centerize board_vec declaration. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 include/asm-mips/txx9/boards.h
Diffstat (limited to 'arch/mips/txx9')
-rw-r--r--arch/mips/txx9/generic/setup.c74
1 files changed, 68 insertions, 6 deletions
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 005179c2af21..dc5dbcc53a91 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -119,14 +119,31 @@ int irq_to_gpio(unsigned irq)
EXPORT_SYMBOL(irq_to_gpio);
#endif
-extern struct txx9_board_vec jmr3927_vec;
-extern struct txx9_board_vec rbtx4927_vec;
-extern struct txx9_board_vec rbtx4937_vec;
-extern struct txx9_board_vec rbtx4938_vec;
+#define BOARD_VEC(board) extern struct txx9_board_vec board;
+#include <asm/txx9/boards.h>
+#undef BOARD_VEC
struct txx9_board_vec *txx9_board_vec __initdata;
static char txx9_system_type[32];
+static struct txx9_board_vec *board_vecs[] __initdata = {
+#define BOARD_VEC(board) &board,
+#include <asm/txx9/boards.h>
+#undef BOARD_VEC
+};
+
+static struct txx9_board_vec *__init find_board_byname(const char *name)
+{
+ int i;
+
+ /* search board_vecs table */
+ for (i = 0; i < ARRAY_SIZE(board_vecs); i++) {
+ if (strstr(board_vecs[i]->system, name))
+ return board_vecs[i];
+ }
+ return NULL;
+}
+
static void __init prom_init_cmdline(void)
{
int argc = (int)fw_arg0;
@@ -169,9 +186,47 @@ static void __init prom_init_cmdline(void)
}
}
-void __init prom_init(void)
+static void __init preprocess_cmdline(void)
{
- prom_init_cmdline();
+ char cmdline[CL_SIZE];
+ char *s;
+
+ strcpy(cmdline, arcs_cmdline);
+ s = cmdline;
+ arcs_cmdline[0] = '\0';
+ while (s && *s) {
+ char *str = strsep(&s, " ");
+ if (strncmp(str, "board=", 6) == 0) {
+ txx9_board_vec = find_board_byname(str + 6);
+ continue;
+ } else if (strncmp(str, "masterclk=", 10) == 0) {
+ unsigned long val;
+ if (strict_strtoul(str + 10, 10, &val) == 0)
+ txx9_master_clock = val;
+ continue;
+ }
+ if (arcs_cmdline[0])
+ strcat(arcs_cmdline, " ");
+ strcat(arcs_cmdline, str);
+ }
+}
+
+static void __init select_board(void)
+{
+ const char *envstr;
+
+ /* first, determine by "board=" argument in preprocess_cmdline() */
+ if (txx9_board_vec)
+ return;
+ /* next, determine by "board" envvar */
+ envstr = prom_getenv("board");
+ if (envstr) {
+ txx9_board_vec = find_board_byname(envstr);
+ if (txx9_board_vec)
+ return;
+ }
+
+ /* select "default" board */
#ifdef CONFIG_CPU_TX39XX
txx9_board_vec = &jmr3927_vec;
#endif
@@ -192,6 +247,13 @@ void __init prom_init(void)
#endif
}
#endif
+}
+
+void __init prom_init(void)
+{
+ prom_init_cmdline();
+ preprocess_cmdline();
+ select_board();
strcpy(txx9_system_type, txx9_board_vec->system);