diff options
Diffstat (limited to 'target/linux/rb532/files-2.6.23/arch/mips/rb500/prom.c')
| -rw-r--r-- | target/linux/rb532/files-2.6.23/arch/mips/rb500/prom.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/target/linux/rb532/files-2.6.23/arch/mips/rb500/prom.c b/target/linux/rb532/files-2.6.23/arch/mips/rb500/prom.c new file mode 100644 index 0000000000..b10172fb51 --- /dev/null +++ b/target/linux/rb532/files-2.6.23/arch/mips/rb500/prom.c @@ -0,0 +1,178 @@ +/* +* 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(); + + mips_machgroup = MACH_GROUP_MIKROTIK; + 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); +} + |