avr/cmd_loadcpm3.c

   1 /*
   2  * (C) Copyright 2015 Leo C. <erbl259-lmu@yahoo.de>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include "common.h"
   8 #include <stdlib.h>
   9 #include <ctype.h>
  10 #include <string.h>
  11 #include <stdbool.h>
  12
  13 #include "command.h"
  14 #include "env.h"
  15 #include "ff.h"
  16 #include "con-utils.h"
  17 #include "z80-if.h"
  18 #include "debug.h"
  19
  20
  21 #define RS              128             /* CP/M record size */
  22
  23 /*
  24  *      Load Routine
  25  *
  26  *      Input:  addr = Page Address of load top
  27  *                      len  = Length in pages of module to read
  28  *
  29  */
  30 int load(FIL *File, uint16_t addr, uint8_t len)
  31 {
  32         uint8_t buffer[RS];
  33         unsigned int br;                                        /* bytes read */
  34         int res;
  35
  36         len *= 2;               /* length in records of module */
  37         //debug("## load: addr: 0x%.4X, records: 0x%.4X, (%u)\n", addr, len, len);
  38
  39         for (; len; len--) {
  40                 addr -= RS;
  41                 res = f_read(File, buffer, RS, &br);
  42                 if (res || br != RS) {
  43                         return 1;
  44                 }
  45
  46                 if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
  47                         my_puts_P(PSTR("Bus timeout\n"));
  48                         return 2;
  49                 }
  50                 z80_write_block(buffer, addr, RS);
  51                 z80_bus_cmd(Release);
  52                 //debug("## written: 0x%.4X\n", addr);
  53         }
  54
  55         return 0;
  56 }
  57
  58 #pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
  59
  60 command_ret_t do_loadcpm3(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  61 {
  62         uint16_t mem_top;
  63         uint8_t res_len;
  64         uint16_t bank_top;
  65         uint8_t bank_len;
  66         uint16_t osentry_adr = 0;
  67         long offset = 0;
  68         char *fname;
  69         FIL File;
  70         /* TODO: put CONFIG_PATH_CPM3SYS in flash */
  71         char default_fname[] = CONFIG_PATH_CPM3SYS;
  72         unsigned int br;                                        /* bytes read */
  73         uint8_t buffer[RS];
  74         int res;
  75
  76         (void) cmdtp; (void) flag;
  77
  78
  79         if (argc > 1)
  80                 offset = strtoul(argv[1], NULL, 16);
  81
  82         fname = getenv(PSTR(ENV_PATH_CPM3SYS));
  83
  84         if (argc > 2) {
  85                 fname = argv[2];
  86         }
  87
  88         if (fname == NULL || *fname == '\0')
  89                 fname = default_fname;
  90
  91         res = f_open(&File, fname, FA_READ );
  92         if (res) {
  93                 printf_P(PSTR("Error: failed to open '%s'\n"), fname);
  94                 return CMD_RET_FAILURE;
  95         }
  96
  97         printf_P(PSTR("Loading: '%s'...\n"), fname);
  98
  99         /* read the load record */
 100         res = f_read(&File, buffer, RS, &br);
 101         if (res || br != RS)
 102                 goto out;
 103
 104         mem_top = buffer[0] << 8;
 105         res_len = buffer[1];
 106         bank_top = buffer[2] << 8;
 107         bank_len = buffer[3];
 108         osentry_adr = buffer[4] + (buffer[5] << 8);
 109
 110         /* read display info */
 111         res = f_read(&File, buffer, RS, &br);
 112         if (res || br != RS)
 113                 goto out;
 114
 115         /* print the info */
 116         buffer[RS-1] = '$';
 117         uint8_t *p = memchr(buffer, '$', RS);
 118         *p = '\0';
 119         my_puts((char *)buffer);
 120
 121         /* Main System Load     */
 122
 123         /* Load Common Portion of System */
 124         if ((res = load(&File, mem_top, res_len)) != 0)
 125                 goto out;
 126
 127         /* Load Banked Portion of System */
 128         res = load(&File, bank_top, bank_len);
 129
 130 out:
 131         f_close(&File);
 132
 133         if (res) {
 134                 printf_P(PSTR("Error: failed to read '%s'\n"), fname);
 135                 return CMD_RET_FAILURE;
 136         } else {
 137                 if (res_len != 0)
 138                         setenv_hex(PSTR(ENV_STARTADDRESS), osentry_adr);
 139                 printf_P(PSTR("Loaded: Resident: "));
 140                 if (res_len != 0)
 141                         printf_P(PSTR("0x%.4X-0x%.4X, "), mem_top-res_len*256, mem_top-1);
 142                 else
 143                         printf_P(PSTR(" -  "));
 144                 printf_P(PSTR("Banked: "));
 145                 if (bank_len != 0)
 146                         printf_P(PSTR("0x%.4X-0x%.4X\n"), bank_top-bank_len*256, bank_top-1);
 147                 else
 148                         printf_P(PSTR(" -  \n"));
 149
 150                 return CMD_RET_SUCCESS;
 151         }
 152 }