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// SPDX-License-Identifier: GPL-2.0
/*
* 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 (IS_LASAT_200()) {
printk(KERN_INFO "LASAT 200 board\n");
lasat_ndelay_divider = LASAT_200_DIVIDER;
at93c = &at93c_defs[1];
} else {
printk(KERN_INFO "LASAT 100 board\n");
lasat_ndelay_divider = LASAT_100_DIVIDER;
at93c = &at93c_defs[0];
}
lasat_init_board_info(); /* Read info from EEPROM */
/* Get the command line */
if (argc > 0) {
strncpy(arcs_cmdline, argv[0], COMMAND_LINE_SIZE-1);
arcs_cmdline[COMMAND_LINE_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;
}
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