ramips: change prom code to accept 'board=FOOBAR' from the command line

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18142 3c298f89-4303-0410-b956-a3cf2f4a3e73

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 587f161..5dad9c2 100644 (file)
--- 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)