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/*
* Misc boot support
*/
#include "common.h"
#include <stdlib.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "command.h"
#include "z80-if.h"
/* ugly hack to get Z180 loadfile into flash memory */
#define const const FLASH
#include "../z180/hdrom.h"
#undef const
static void z80_load_mem(void)
{
unsigned sec = 0;
uint32_t sec_base = hdrom_start;
printf_P(PSTR("Loading Z180 memory... \n"));
while (sec < hdrom_sections) {
printf_P(PSTR(" From: 0x%.5lX to: 0x%.5lX (%5li bytes)\n"),
hdrom_address[sec],
hdrom_address[sec]+hdrom_length_of_sections[sec] - 1,
hdrom_length_of_sections[sec]);
z80_bus_cmd(Request);
z80_write_block((const FLASH unsigned char *) &hdrom[sec_base], /* src */
hdrom_address[sec], /* dest */
hdrom_length_of_sections[sec]); /* len */
z80_bus_cmd(Release);
sec_base+=hdrom_length_of_sections[sec];
sec++;
}
}
command_ret_t do_loadf(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
(void) cmdtp; (void) flag; (void) argc; (void) argv;
if (z80_bus_state() & ZST_RUNNING) {
printf_P(PSTR("## Can't load while CPU is running!\n"));
return CMD_RET_FAILURE;
}
z80_load_mem();
return CMD_RET_SUCCESS;
}
command_ret_t do_busreq_pulse(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
uint16_t count=1;
(void) cmdtp; (void) flag;
if (!(z80_bus_state() & ZST_RUNNING)) {
printf_P(PSTR("## CPU is not running!\n"));
return CMD_RET_FAILURE;
}
if (argc > 1)
count = (uint16_t) strtoul(argv[2], NULL, 16);
z80_bus_cmd(Request);
while (count--)
z80_bus_cmd(M_Cycle);
return CMD_RET_SUCCESS;
}
command_ret_t do_go(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
uint32_t addr;
(void) cmdtp; (void) flag;
if (argc < 2)
return CMD_RET_USAGE;
addr = strtoul(argv[1], NULL, 16);
if (addr >= (1UL<<16)) {
printf_P(PSTR("## Startaddress 0x%05lx too high.\n"
" (Out of logical address space (0x00000-0x0ffff))\n"),
addr);
return CMD_RET_FAILURE;
}
if (z80_bus_state() & ZST_RUNNING) {
printf_P(PSTR("## CPU allready running!\n"));
return CMD_RET_FAILURE;
}
printf_P(PSTR("## Starting application at 0x%04lx ...\n"), addr);
if (addr != 0) {
uint8_t tmp[3];
uint_fast8_t i;
z80_bus_cmd(Request);
for (i = 0; i < 3; i++)
tmp[i] = z80_read(i);
z80_write(0, 0xc3);
z80_write(1, addr);
z80_write(2, (addr >> 8));
z80_bus_cmd(Run);
z80_bus_cmd(M_Cycle);
z80_bus_cmd(M_Cycle);
for (i = 0; i < 3; i++)
z80_write(i, tmp[i]);
} else
z80_bus_cmd(Run);
z80_bus_cmd(Release);
return CMD_RET_SUCCESS;
}
command_ret_t do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
(void) cmdtp; (void) flag; (void) argc; (void) argv;
printf_P(PSTR("## CPU now in reset state.\n"));
z80_bus_cmd(Reset);
return CMD_RET_SUCCESS;
}
command_ret_t do_restart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
(void) cmdtp; (void) flag; (void) argc; (void) argv;
z80_bus_cmd(Restart);
return CMD_RET_SUCCESS;
}
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