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