127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
|
/*
|
||
|
|
* PROM interface routines.
|
||
|
|
*/
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
#include <linux/ctype.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/bootmem.h>
|
||
|
|
#include <linux/ioport.h>
|
||
|
|
#include <asm/bootinfo.h>
|
||
|
|
#include <asm/lasat/lasat.h>
|
||
|
|
#include <asm/cpu.h>
|
||
|
|
|
||
|
|
#include "at93c.h"
|
||
|
|
#include <asm/lasat/eeprom.h>
|
||
|
|
#include "prom.h"
|
||
|
|
|
||
|
|
#define RESET_VECTOR 0xbfc00000
|
||
|
|
#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
|
||
|
|
#define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0)
|
||
|
|
#define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1)
|
||
|
|
#define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2)
|
||
|
|
|
||
|
|
static void null_prom_display(const char *string, int pos, int clear)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void null_prom_monitor(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void null_prom_putc(char c)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/* these are functions provided by the bootloader */
|
||
|
|
static void (*__prom_putc)(char c) = null_prom_putc;
|
||
|
|
|
||
|
|
void prom_putchar(char c)
|
||
|
|
{
|
||
|
|
__prom_putc(c);
|
||
|
|
}
|
||
|
|
|
||
|
|
void (*prom_display)(const char *string, int pos, int clear) =
|
||
|
|
null_prom_display;
|
||
|
|
void (*prom_monitor)(void) = null_prom_monitor;
|
||
|
|
|
||
|
|
unsigned int lasat_ndelay_divider;
|
||
|
|
|
||
|
|
static void setup_prom_vectors(void)
|
||
|
|
{
|
||
|
|
u32 version = *(u32 *)(RESET_VECTOR + 0x90);
|
||
|
|
|
||
|
|
if (version >= 307) {
|
||
|
|
prom_display = (void *)PROM_DISPLAY_ADDR;
|
||
|
|
__prom_putc = (void *)PROM_PUTC_ADDR;
|
||
|
|
prom_monitor = (void *)PROM_MONITOR_ADDR;
|
||
|
|
}
|
||
|
|
printk(KERN_DEBUG "prom vectors set up\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct at93c_defs at93c_defs[N_MACHTYPES] = {
|
||
|
|
{
|
||
|
|
.reg = (void *)AT93C_REG_100,
|
||
|
|
.rdata_reg = (void *)AT93C_RDATA_REG_100,
|
||
|
|
.rdata_shift = AT93C_RDATA_SHIFT_100,
|
||
|
|
.wdata_shift = AT93C_WDATA_SHIFT_100,
|
||
|
|
.cs = AT93C_CS_M_100,
|
||
|
|
.clk = AT93C_CLK_M_100
|
||
|
|
}, {
|
||
|
|
.reg = (void *)AT93C_REG_200,
|
||
|
|
.rdata_reg = (void *)AT93C_RDATA_REG_200,
|
||
|
|
.rdata_shift = AT93C_RDATA_SHIFT_200,
|
||
|
|
.wdata_shift = AT93C_WDATA_SHIFT_200,
|
||
|
|
.cs = AT93C_CS_M_200,
|
||
|
|
.clk = AT93C_CLK_M_200
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
void __init prom_init(void)
|
||
|
|
{
|
||
|
|
int argc = fw_arg0;
|
||
|
|
char **argv = (char **) fw_arg1;
|
||
|
|
|
||
|
|
setup_prom_vectors();
|
||
|
|
|
||
|
|
if (current_cpu_data.cputype == CPU_R5000) {
|
||
|
|
printk(KERN_INFO "LASAT 200 board\n");
|
||
|
|
mips_machtype = MACH_LASAT_200;
|
||
|
|
lasat_ndelay_divider = LASAT_200_DIVIDER;
|
||
|
|
} else {
|
||
|
|
printk(KERN_INFO "LASAT 100 board\n");
|
||
|
|
mips_machtype = MACH_LASAT_100;
|
||
|
|
lasat_ndelay_divider = LASAT_100_DIVIDER;
|
||
|
|
}
|
||
|
|
|
||
|
|
at93c = &at93c_defs[mips_machtype];
|
||
|
|
|
||
|
|
lasat_init_board_info(); /* Read info from EEPROM */
|
||
|
|
|
||
|
|
/* Get the command line */
|
||
|
|
if (argc > 0) {
|
||
|
|
strncpy(arcs_cmdline, argv[0], CL_SIZE-1);
|
||
|
|
arcs_cmdline[CL_SIZE-1] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set the I/O base address */
|
||
|
|
set_io_port_base(KSEG1);
|
||
|
|
|
||
|
|
/* Set memory regions */
|
||
|
|
ioport_resource.start = 0;
|
||
|
|
ioport_resource.end = 0xffffffff; /* Wrong, fixme. */
|
||
|
|
|
||
|
|
add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init prom_free_prom_memory(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
const char *get_system_type(void)
|
||
|
|
{
|
||
|
|
return lasat_board_info.li_bmstr;
|
||
|
|
}
|