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authorGabor Juhos <juhosg@openwrt.org>2009-10-25 07:10:16 +0000
committerGabor Juhos <juhosg@openwrt.org>2009-10-25 07:10:16 +0000
commit2ad69183a8eb1789ea077cb56525d4055ac6b1fa (patch)
treebd724aac3d29c2f462ffce628782d9f0fe689f76 /target/linux/ramips/files/arch
parentd681005ce303bee73a426025b4ffe9510e382837 (diff)
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ramips: change prom code to accept 'board=FOOBAR' from the command line
SVN-Revision: 18142
Diffstat (limited to 'target/linux/ramips/files/arch')
-rw-r--r--target/linux/ramips/files/arch/mips/ralink/common/prom.c103
1 files changed, 69 insertions, 34 deletions
diff --git a/target/linux/ramips/files/arch/mips/ralink/common/prom.c b/target/linux/ramips/files/arch/mips/ralink/common/prom.c
index 587f161107..5dad9c28fb 100644
--- a/target/linux/ramips/files/arch/mips/ralink/common/prom.c
+++ b/target/linux/ramips/files/arch/mips/ralink/common/prom.c
@@ -24,10 +24,6 @@ struct board_rec {
enum ramips_mach_type mach_type;
};
-static int ramips_prom_argc __initdata;
-static char **ramips_prom_argv __initdata;
-static char **ramips_prom_envp __initdata;
-
static struct board_rec boards[] __initdata = {
{
.name = "RT-N15",
@@ -70,46 +66,82 @@ static inline void *to_ram_addr(void *addr)
return NULL;
}
-static __init char *ramips_prom_getargv(const char *name)
+static void __init prom_append_cmdline(const char *name,
+ const char *value)
+{
+ char buf[CL_SIZE];
+
+ snprintf(buf, sizeof(buf), " %s=%s", name, value);
+ strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
+}
+
+#ifdef CONFIG_IMAGE_CMDLINE_HACK
+extern char __image_cmdline[];
+
+static int __init use_image_cmdline(void)
+{
+ char *p = __image_cmdline;
+ int replace = 0;
+
+ if (*p == '-') {
+ replace = 1;
+ p++;
+ }
+
+ if (*p == '\0')
+ return 0;
+
+ if (replace) {
+ strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
+ } else {
+ strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+ strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+ }
+
+ return 1;
+}
+#else
+static int inline use_image_cmdline(void) { return 0; }
+#endif
+
+static __init void prom_init_cmdline(int argc, char **argv)
{
- int len = strlen(name);
int i;
- if (!ramips_prom_argv) {
+ if (use_image_cmdline())
+ return;
+
+ if (!argv) {
printk(KERN_DEBUG "argv=%p is invalid, skipping\n",
- ramips_prom_argv);
- return NULL;
+ argv);
+ return;
}
- for (i = 0; i < ramips_prom_argc; i++) {
- char *argv = to_ram_addr(ramips_prom_argv[i]);
+ for (i = 0; i < argc; i++) {
+ char *p = to_ram_addr(argv[i]);
- if (!argv) {
+ if (!p) {
printk(KERN_DEBUG
"argv[%d]=%p is invalid, skipping\n",
- i, ramips_prom_argv[i]);
+ i, argv[i]);
continue;
}
- printk(KERN_DEBUG "argv[%d]: %s\n", i, argv);
- if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
- return argv + len + 1;
+ printk(KERN_DEBUG "argv[%d]: %s\n", i, p);
+ strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+ strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
}
-
- return NULL;
}
-static __init char *ramips_prom_getenv(const char *envname)
+static __init char *prom_append_env(char **env, const char *envname)
{
#define PROM_MAX_ENVS 256
int len = strlen(envname);
- char **env;
int i;
- env = ramips_prom_envp;
if (!env) {
- printk(KERN_DEBUG "envp=%p is not in RAM, skipping\n",
- ramips_prom_envp);
+ printk(KERN_DEBUG "env=%p is not in RAM, skipping\n",
+ env);
return NULL;
}
@@ -121,14 +153,14 @@ static __init char *ramips_prom_getenv(const char *envname)
printk(KERN_DEBUG "env[%d]: %s\n", i, p);
if (strncmp(envname, p, len) == 0 && p[len] == '=')
- return p + len + 1;
+ prom_append_cmdline(envname, p + len + 1);
}
return NULL;
#undef PROM_MAX_ENVS
}
-static __init void find_board_byname(char *name)
+static __init int ramips_board_setup(char *name)
{
int i;
@@ -137,26 +169,29 @@ static __init void find_board_byname(char *name)
ramips_mach = boards[i].mach_type;
break;
}
+
+ return 1;
}
+__setup("board=", ramips_board_setup);
void __init prom_init(void)
{
- char *p;
+ int argc;
+ char **envp;
+ char **argv;
printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, fw_arg2=%08x, fw_arg3=%08x\n",
(unsigned int)fw_arg0, (unsigned int)fw_arg1,
(unsigned int)fw_arg2, (unsigned int)fw_arg3);
- ramips_prom_argc = fw_arg0;
- ramips_prom_argv = to_ram_addr((void *)fw_arg1);
- ramips_prom_envp = to_ram_addr((void *)fw_arg2);
+ argc = fw_arg0;
+ argv = to_ram_addr((void *)fw_arg1);
+ prom_init_cmdline(argc, argv);
- p = ramips_prom_getargv("board");
- if (!p)
- p = ramips_prom_getenv("board");
- if (p)
- find_board_byname(p);
+ envp = to_ram_addr((void *)fw_arg2);
+ prom_append_env(envp, "board");
+ prom_append_env(envp, "ethaddr");
}
void __init prom_free_prom_memory(void)