2 * PROM interface routines.
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>
10 #include <linux/bootmem.h>
11 #include <linux/ioport.h>
12 #include <asm/bootinfo.h>
13 #include <asm/lasat/lasat.h>
17 #include <asm/lasat/eeprom.h>
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)
26 static void null_prom_printf(const char * fmt, ...)
30 static void null_prom_display(const char *string, int pos, int clear)
34 static void null_prom_monitor(void)
38 static void null_prom_putc(char c)
42 /* these are functions provided by the bootloader */
43 static void (* prom_putc)(char c) = null_prom_putc;
44 void (* prom_printf)(const char * fmt, ...) = null_prom_printf;
45 void (* prom_display)(const char *string, int pos, int clear) =
47 void (* prom_monitor)(void) = null_prom_monitor;
49 unsigned int lasat_ndelay_divider;
51 #define PROM_PRINTFBUF_SIZE 256
52 static char prom_printfbuf[PROM_PRINTFBUF_SIZE];
54 static void real_prom_printf(const char * fmt, ...)
58 char *c = prom_printfbuf;
62 len = vsnprintf(prom_printfbuf, PROM_PRINTFBUF_SIZE, fmt, ap);
65 /* output overflowed the buffer */
66 if (len < 0 || len > PROM_PRINTFBUF_SIZE)
67 len = PROM_PRINTFBUF_SIZE;
69 for (i=0; i < len; i++) {
76 static void setup_prom_vectors(void)
78 u32 version = *(u32 *)(RESET_VECTOR + 0x90);
81 prom_display = (void *)PROM_DISPLAY_ADDR;
82 prom_putc = (void *)PROM_PUTC_ADDR;
83 prom_printf = real_prom_printf;
84 prom_monitor = (void *)PROM_MONITOR_ADDR;
86 prom_printf("prom vectors set up\n");
89 static struct at93c_defs at93c_defs[N_MACHTYPES] = {
90 {(void *)AT93C_REG_100, (void *)AT93C_RDATA_REG_100, AT93C_RDATA_SHIFT_100,
91 AT93C_WDATA_SHIFT_100, AT93C_CS_M_100, AT93C_CLK_M_100},
92 {(void *)AT93C_REG_200, (void *)AT93C_RDATA_REG_200, AT93C_RDATA_SHIFT_200,
93 AT93C_WDATA_SHIFT_200, AT93C_CS_M_200, AT93C_CLK_M_200},
96 void __init prom_init(void)
99 char **argv = (char **) fw_arg1;
101 setup_prom_vectors();
103 if (current_cpu_data.cputype == CPU_R5000) {
104 prom_printf("LASAT 200 board\n");
105 mips_machtype = MACH_LASAT_200;
106 lasat_ndelay_divider = LASAT_200_DIVIDER;
108 prom_printf("LASAT 100 board\n");
109 mips_machtype = MACH_LASAT_100;
110 lasat_ndelay_divider = LASAT_100_DIVIDER;
113 at93c = &at93c_defs[mips_machtype];
115 lasat_init_board_info(); /* Read info from EEPROM */
117 mips_machgroup = MACH_GROUP_LASAT;
119 /* Get the command line */
121 strncpy(arcs_cmdline, argv[0], CL_SIZE-1);
122 arcs_cmdline[CL_SIZE-1] = '\0';
125 /* Set the I/O base address */
126 set_io_port_base(KSEG1);
128 /* Set memory regions */
129 ioport_resource.start = 0;
130 ioport_resource.end = 0xffffffff; /* Wrong, fixme. */
132 add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
135 unsigned long __init prom_free_prom_memory(void)
140 const char *get_system_type(void)
142 return lasat_board_info.li_bmstr;