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

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SVN-Revision: 18142
This commit is contained in:
Gabor Juhos 2009-10-25 07:10:16 +00:00
parent d681005ce3
commit 2ad69183a8
1 changed files with 71 additions and 36 deletions
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107
target/linux/ramips/files/arch/mips/ralink/common/prom.c
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@ -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)
{
int len = strlen(name);
int i;
char buf[CL_SIZE];
if (!ramips_prom_argv) {
printk(KERN_DEBUG "argv=%p is invalid, skipping\n",
ramips_prom_argv);
return NULL;
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++;
}
for (i = 0; i < ramips_prom_argc; i++) {
char *argv = to_ram_addr(ramips_prom_argv[i]);
if (*p == '\0')
return 0;
if (!argv) {
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 i;
if (use_image_cmdline())
return;
if (!argv) {
printk(KERN_DEBUG "argv=%p is invalid, skipping\n",
argv);
return;
}
for (i = 0; i < argc; i++) {
char *p = to_ram_addr(argv[i]);
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)