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/*
* (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0
*/
/*
* Misc boot support
*/
#include "common.h"
#include <stdlib.h>
#include <ctype.h>
#include <util/atomic.h>
#include "command.h"
#include "cli_readline.h"
#include "cli.h"
#include "env.h"
#include "con-utils.h"
#include "z80-if.h"
#include "z180-serv.h"
#include "debug.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_write_block_P((const FLASH unsigned char *) &hdrom[sec_base], /* src */
hdrom_address[sec], /* dest */
hdrom_length_of_sections[sec]); /* len */
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) {
my_puts_P(PSTR("Can't load while CPU is running!\n"));
return CMD_RET_FAILURE;
}
if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
my_puts_P(PSTR("Bus timeout\n"));
return CMD_RET_FAILURE;
}
z80_load_mem();
z80_bus_cmd(Release);
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[1], 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];
z80_bus_cmd(Request);
z80_read_block (tmp, 0, 3);
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);
z80_write_block(tmp, 0, 3);
} else
z80_bus_cmd(Run);
z80_bus_cmd(Release);
return CMD_RET_SUCCESS;
}
static
void reset_cpu(bus_cmd_t mode)
{
restart_z180_serv();
z80_bus_cmd(mode);
}
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"));
reset_cpu(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;
reset_cpu(Restart);
return CMD_RET_SUCCESS;
}
static
void print_con_usage(char esc)
{ printf_P(PSTR("\n"
"------------------------------------------------\n"
" ?,H - This Help\n"
" Q,X - Return to command line\n"
" R - Reset (Restart) CPU\n"
" : - Execute monitor command\n"
" \\ - code input:\n"
" \\nnn 3 decimal digits character code\n"
" \\Xhh 2 hexadecimal digits character code\n"
" ^%c - (Escape char) Type again to send itself\n"
"key>"
), esc + 0x40);
}
command_ret_t do_console(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int ch;
uint8_t pending;
// uint8_t help_prompt = 0;
uint8_t code = 0;
uint8_t state = 0;
char esc_char = (char) getenv_ulong(PSTR(ENV_ESC_CHAR), 16, CONFIG_ESC_CHAR);
(void) cmdtp; (void) flag; (void) argc; (void) argv;
printf_P(PSTR("Connecting to CPU. Escape character is '^%c'.\n"),
esc_char + 0x40);
while (1) {
ATOMIC_BLOCK(ATOMIC_FORCEON) {
pending = (Stat & S_CON_PENDING) != 0;
Stat &= ~S_CON_PENDING;
}
if (pending) {
uint8_t count = 100;
while ((ch = z80_memfifo_getc(fifo_conout)) >= 0 && --count)
putchar(ch);
}
if ((ch = my_getchar(0)) >= 0) {
switch (state) {
case 0:
if (ch == esc_char) {
state = 1;
/* TODO: Timer starten */
} else {
z80_memfifo_putc(fifo_conin, ch);
}
break;
case 2:
printf_P(PSTR("\n"
"------------------------------------------------\n"));
case 1:
state = 0;
switch (toupper(ch)) {
case '?':
case 'H':
print_con_usage(esc_char);
state = 2;
break;
case 'R':
reset_cpu(Restart);
break;
case 'X':
case 'Q':
printf_P(PSTR("\n"));
goto quit;
break;
case ':':
putchar('\n');
int cmdlen = cli_readline(PSTR(": "), 1);
if (cmdlen > 0)
run_command(console_buffer, 0);
break;
case '\\':
code = 0;
state = 3;
break;
default:
if (ch == esc_char)
z80_memfifo_putc(fifo_conin, ch);
break;
}
break;
case 3:
if (toupper(ch) == 'X') {
state = 6;
break;
}
/* fall thru */
case 4:
case 5:
if (isdigit(ch)) {
code = code * 10 + ch - '0';
state++;
} else {
if (state > 3)
z80_memfifo_putc(fifo_conin, code);
z80_memfifo_putc(fifo_conin, ch);
state = 0;
}
if (state > 5) {
z80_memfifo_putc(fifo_conin, code);
state = 0;
}
break;
case 6:
case 7:
if (isxdigit(ch)) {
ch = toupper(ch);
if (ch >= 'A')
ch -= 'A' - 10;
code = code * 16 + ch - '0';
state++;
}else {
if (state > 6)
z80_memfifo_putc(fifo_conin, code);
z80_memfifo_putc(fifo_conin, ch);
state = 0;
}
if (state > 7) {
z80_memfifo_putc(fifo_conin, code);
state = 0;
}
break;
}
}
}
quit:
return CMD_RET_SUCCESS;
}
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