mirror of https://github.com/hak5/openwrt.git
164 lines
3.4 KiB
C
164 lines
3.4 KiB
C
/*
|
|
* Ralink SoC specific prom routines
|
|
*
|
|
* Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
|
|
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
#include <asm/mach-ralink/common.h>
|
|
#include <asm/mach-ralink/machine.h>
|
|
#include <ralink_soc.h>
|
|
|
|
static inline void *to_ram_addr(void *addr)
|
|
{
|
|
u32 base;
|
|
|
|
base = KSEG0ADDR(RALINK_SOC_SDRAM_BASE);
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RALINK_SOC_MEM_SIZE_MAX)))
|
|
return addr;
|
|
|
|
base = KSEG1ADDR(RALINK_SOC_SDRAM_BASE);
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RALINK_SOC_MEM_SIZE_MAX)))
|
|
return addr;
|
|
|
|
/* some U-Boot variants uses physical addresses */
|
|
base = RALINK_SOC_SDRAM_BASE;
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RALINK_SOC_MEM_SIZE_MAX)))
|
|
return (void *)KSEG0ADDR(addr);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void __init prom_append_cmdline(const char *name,
|
|
const char *value)
|
|
{
|
|
char buf[COMMAND_LINE_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 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, argv[i]);
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_DEBUG "argv[%d]: %s\n", i, p);
|
|
strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
|
|
strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
|
|
}
|
|
}
|
|
|
|
static __init char *prom_append_env(char **env, const char *envname)
|
|
{
|
|
#define PROM_MAX_ENVS 256
|
|
int len = strlen(envname);
|
|
int i;
|
|
|
|
if (!env) {
|
|
printk(KERN_DEBUG "env=%p is not in RAM, skipping\n",
|
|
env);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < PROM_MAX_ENVS; i++) {
|
|
char *p = to_ram_addr(env[i]);
|
|
|
|
if (!p)
|
|
break;
|
|
|
|
printk(KERN_DEBUG "env[%d]: %s\n", i, p);
|
|
if (strncmp(envname, p, len) == 0 && p[len] == '=')
|
|
prom_append_cmdline(envname, p + len + 1);
|
|
}
|
|
|
|
return NULL;
|
|
#undef PROM_MAX_ENVS
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
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);
|
|
|
|
argc = fw_arg0;
|
|
argv = to_ram_addr((void *)fw_arg1);
|
|
prom_init_cmdline(argc, argv);
|
|
|
|
envp = to_ram_addr((void *)fw_arg2);
|
|
prom_append_env(envp, "board");
|
|
prom_append_env(envp, "ethaddr");
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
/* We do not have to prom memory to free */
|
|
}
|