1/* 2 * PROM interface routines. 3 */ 4#include <linux/types.h> 5#include <linux/init.h> 6#include <linux/string.h> 7#include <linux/ctype.h> 8#include <linux/kernel.h> 9#include <linux/mm.h> 10#include <linux/bootmem.h> 11#include <linux/ioport.h> 12#include <asm/bootinfo.h> 13#include <asm/lasat/lasat.h> 14#include <asm/cpu.h> 15 16#include "at93c.h" 17#include <asm/lasat/eeprom.h> 18#include "prom.h" 19 20#define RESET_VECTOR 0xbfc00000 21#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n)) 22#define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0) 23#define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1) 24#define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2) 25 26static void null_prom_display(const char *string, int pos, int clear) 27{ 28} 29 30static void null_prom_monitor(void) 31{ 32} 33 34static void null_prom_putc(char c) 35{ 36} 37 38/* these are functions provided by the bootloader */ 39static void (* __prom_putc)(char c) = null_prom_putc; 40 41void prom_putchar(char c) 42{ 43 __prom_putc(c); 44} 45 46void (* prom_display)(const char *string, int pos, int clear) = 47 null_prom_display; 48void (* prom_monitor)(void) = null_prom_monitor; 49 50unsigned int lasat_ndelay_divider; 51 52static void setup_prom_vectors(void) 53{ 54 u32 version = *(u32 *)(RESET_VECTOR + 0x90); 55 56 if (version >= 307) { 57 prom_display = (void *)PROM_DISPLAY_ADDR; 58 __prom_putc = (void *)PROM_PUTC_ADDR; 59 prom_monitor = (void *)PROM_MONITOR_ADDR; 60 } 61 printk("prom vectors set up\n"); 62} 63 64static struct at93c_defs at93c_defs[N_MACHTYPES] = { 65 {(void *)AT93C_REG_100, (void *)AT93C_RDATA_REG_100, AT93C_RDATA_SHIFT_100, 66 AT93C_WDATA_SHIFT_100, AT93C_CS_M_100, AT93C_CLK_M_100}, 67 {(void *)AT93C_REG_200, (void *)AT93C_RDATA_REG_200, AT93C_RDATA_SHIFT_200, 68 AT93C_WDATA_SHIFT_200, AT93C_CS_M_200, AT93C_CLK_M_200}, 69}; 70 71void __init prom_init(void) 72{ 73 int argc = fw_arg0; 74 char **argv = (char **) fw_arg1; 75 76 setup_prom_vectors(); 77 78 if (current_cpu_data.cputype == CPU_R5000) { 79 printk("LASAT 200 board\n"); 80 mips_machtype = MACH_LASAT_200; 81 lasat_ndelay_divider = LASAT_200_DIVIDER; 82 } else { 83 printk("LASAT 100 board\n"); 84 mips_machtype = MACH_LASAT_100; 85 lasat_ndelay_divider = LASAT_100_DIVIDER; 86 } 87 88 at93c = &at93c_defs[mips_machtype]; 89 90 lasat_init_board_info(); /* Read info from EEPROM */ 91 92 mips_machgroup = MACH_GROUP_LASAT; 93 94 /* Get the command line */ 95 if (argc > 0) { 96 strncpy(arcs_cmdline, argv[0], CL_SIZE-1); 97 arcs_cmdline[CL_SIZE-1] = '\0'; 98 } 99 100 /* Set the I/O base address */ 101 set_io_port_base(KSEG1); 102 103 /* Set memory regions */ 104 ioport_resource.start = 0; 105 ioport_resource.end = 0xffffffff; 106 107 add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM); 108} 109 110void __init prom_free_prom_memory(void) 111{ 112} 113 114const char *get_system_type(void) 115{ 116 return lasat_board_info.li_bmstr; 117} 118