diff options
Diffstat (limited to 'avr/cmd_boot.c')
| -rw-r--r-- | avr/cmd_boot.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/avr/cmd_boot.c b/avr/cmd_boot.c new file mode 100644 index 0000000..2c3a533 --- /dev/null +++ b/avr/cmd_boot.c @@ -0,0 +1,275 @@ + +/* + * Misc boot support + */ +#include "common.h" +#include <stdlib.h> +#include <ctype.h> +#include <util/atomic.h> + +#include "command.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_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; +} + +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" + " R - Reset (Restart) CPU\n" + " Q,X - Return to command line\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; + + (void) cmdtp; (void) flag; (void) argc; (void) argv; + + + while (1) { + + ATOMIC_BLOCK(ATOMIC_FORCEON) { + pending = (Stat & S_CON_PENDING) != 0; + Stat &= ~S_CON_PENDING; + } + if (pending) + while ((ch = z80_memfifo_getc(fifo_conout)) >= 0) + putchar(ch); + + if ((ch = my_getchar(0)) >= 0) { + switch (state) { + case 0: + if (ch == CONFIG_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(CONFIG_ESC_CHAR); + state = 2; + break; + + case 'R': + reset_cpu(Restart); + break; + + case 'X': + case 'Q': + printf_P(PSTR("\n")); + goto quit; + break; + + case '\\': + code = 0; + state = 3; + break; + + case CONFIG_ESC_CHAR: + z80_memfifo_putc(fifo_conin, ch); + break; + default: + 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++; + } + 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++; + } + if (state > 7) { + z80_memfifo_putc(fifo_conin, code); + state = 0; + } + break; + } + } + } +quit: + return CMD_RET_SUCCESS; +} + |