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/*
* prom.c
**********************************************************************
* P . Sadik Oct 10, 2003
*
* Started change log
* idt_cpu_freq is make a kernel configuration parameter
* idt_cpu_freq is exported so that other modules can use it.
* Code cleanup
**********************************************************************
* P. Sadik Oct 20, 2003
*
* Removed NVRAM code from here, since they are already available under
* nvram directory.
* Added serial port initialisation.
**********************************************************************
**********************************************************************
* P. Sadik Oct 30, 2003
*
* Added reset_cons_port
**********************************************************************
P.Christeas, 2005-2006
Port to 2.6, add 2.6 cmdline parsing
*/
#include <linux/autoconf.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/console.h>
#include <asm/bootinfo.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <asm/rc32434/ddr.h>
#define PROM_ENTRY(x) (0xbfc00000+((x)*8))
extern void __init setup_serial_port(void);
unsigned int idt_cpu_freq = 132000000;
EXPORT_SYMBOL(idt_cpu_freq);
unsigned int gpio_bootup_state = 0;
EXPORT_SYMBOL(gpio_bootup_state);
char mips_mac_address[18] = "08:00:06:05:40:01";
EXPORT_SYMBOL(mips_mac_address);
/* what to append to cmdline when button is [not] pressed */
#define GPIO_INIT_NOBUTTON ""
#define GPIO_INIT_BUTTON " 2"
#ifdef CONFIG_MIKROTIK_RB500
unsigned soft_reboot = 0;
EXPORT_SYMBOL(soft_reboot);
#endif
#define SR_NMI 0x00180000 /* NMI */
#define SERIAL_SPEED_ENTRY 0x00000001
#ifdef CONFIG_REMOTE_DEBUG
extern int remote_debug;
#endif
#define FREQ_TAG "HZ="
#define GPIO_TAG "gpio="
#define KMAC_TAG "kmac="
#define MEM_TAG "mem="
#define BOARD_TAG "board="
#define IGNORE_CMDLINE_MEM 1
#define DEBUG_DDR
#define BOARD_RB532 "500"
#define BOARD_RB532A "500r5"
void parse_soft_settings(unsigned *ptr, unsigned size);
void parse_hard_settings(unsigned *ptr, unsigned size);
void __init prom_setup_cmdline(void);
void __init prom_init(void)
{
DDR_t ddr = (DDR_t) DDR_VirtualAddress; /* define the pointer to the DDR registers */
phys_t memsize = 0-ddr->ddrmask;
/* this should be the very first message, even before serial is properly initialized */
prom_setup_cmdline();
setup_serial_port();
soft_reboot = read_c0_status() & SR_NMI;
pm_power_off = NULL;
/*
* give all RAM to boot allocator,
* except for the first 0x400 and the last 0x200 bytes
*/
add_memory_region(ddr->ddrbase + 0x400, memsize - 0x600, BOOT_MEM_RAM);
}
void __init prom_free_prom_memory(void)
{
/* No prom memory to free */
}
static inline int match_tag(char *arg, const char *tag)
{
return (strncmp(arg, tag, strlen(tag)) == 0);
}
static inline unsigned long tag2ul(char *arg, const char *tag)
{
char *num = arg+strlen(tag);
return simple_strtoul(num, 0, 10);
}
extern char _image_cmdline;
void __init prom_setup_cmdline(void){
char cmd_line[CL_SIZE];
char *cp;
int prom_argc;
char **prom_argv, **prom_envp;
int i;
prom_argc = fw_arg0;
prom_argv = (char **) fw_arg1;
prom_envp = (char **) fw_arg2;
cp=cmd_line;
/* Note: it is common that parameters start at argv[1] and not argv[0],
however, our elf loader starts at [0] */
for(i=0;i<prom_argc;i++){
if (match_tag(prom_argv[i], FREQ_TAG)) {
idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG);
continue;
}
#ifdef IGNORE_CMDLINE_MEM
/* parses out the "mem=xx" arg */
if (match_tag(prom_argv[i], MEM_TAG)) {
continue;
}
#endif
if (i>0) *(cp++) = ' ';
if (match_tag(prom_argv[i], BOARD_TAG)) {
char *board = prom_argv[i] + strlen(BOARD_TAG);
if (match_tag(board, BOARD_RB532A))
mips_machtype = MACH_MIKROTIK_RB532A;
else
mips_machtype = MACH_MIKROTIK_RB532;
}
if (match_tag(prom_argv[i], GPIO_TAG)) {
gpio_bootup_state = tag2ul(prom_argv[i], GPIO_TAG);
}
strcpy(cp,prom_argv[i]);
cp+=strlen(prom_argv[i]);
}
*(cp++) = ' ';
strcpy(cp,(&_image_cmdline + 8));
cp += strlen(&_image_cmdline);
i=strlen(arcs_cmdline);
if (i>0){
*(cp++) = ' ';
strcpy(cp,arcs_cmdline);
cp+=strlen(arcs_cmdline);
}
if (gpio_bootup_state&0x02)
strcpy(cp,GPIO_INIT_NOBUTTON);
else
strcpy(cp,GPIO_INIT_BUTTON);
cmd_line[CL_SIZE-1] = '\0';
strcpy(arcs_cmdline,cmd_line);
}
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