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1 | /* | |
2 | * (C) Copyright 2015 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0 | |
5 | */ | |
6 | ||
7 | #include "cmd_loadihex.h" | |
8 | #include <ctype.h> | |
9 | ||
10 | #include "con-utils.h" | |
11 | #include "z80-if.h" | |
12 | #include "debug.h" | |
13 | ||
14 | ||
15 | uint32_t detect_ramsize(void) | |
16 | { | |
17 | uint32_t addr; | |
18 | uint8_t save_addr, save_0; | |
19 | const uint8_t PATTERN_1 = 0x55; | |
20 | const uint8_t PATTERN_2 = ~PATTERN_1; | |
21 | ||
22 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
23 | my_puts_P(PSTR("Bus timeout\n")); | |
24 | return 0; | |
25 | } | |
26 | ||
27 | save_0 = z80_read(0); | |
28 | z80_write(0, PATTERN_1); | |
29 | ||
30 | for (addr=1; addr < CONFIG_SYS_RAMSIZE_MAX; addr <<= 1) { | |
31 | save_addr = z80_read(addr); | |
32 | z80_write(addr, PATTERN_2); | |
33 | if (z80_read(0) != PATTERN_1 || z80_read(addr) != PATTERN_2) | |
34 | break; | |
35 | z80_write(addr, save_addr); | |
36 | } | |
37 | z80_write(0, save_0); | |
38 | z80_bus_cmd(Release); | |
39 | ||
40 | return addr; | |
41 | } | |
42 | ||
43 | typedef enum { | |
44 | IHX_OK, | |
45 | IHX_BROKEN, | |
46 | IHX_CHKSUMERR | |
47 | } ihx_rstat_t; | |
48 | ||
49 | typedef struct { | |
50 | ihx_rstat_t status; | |
51 | int8_t type; | |
52 | uint8_t len; | |
53 | uint16_t address; | |
54 | uint8_t data[256]; | |
55 | } ihex_t; | |
56 | ||
57 | ||
58 | static int get_hexdigit(void) | |
59 | { | |
60 | int c; | |
61 | c = toupper(my_getchar(1)); | |
62 | if (isxdigit(c)) { | |
63 | c -= '0'; | |
64 | if (c > 9) | |
65 | c -= ('A' - '0' - 10); | |
66 | return c; | |
67 | } else | |
68 | return -1; | |
69 | } | |
70 | ||
71 | static int get_hexbyte(void) | |
72 | { | |
73 | uint8_t i,j; | |
74 | ||
75 | if ((i = (uint8_t) get_hexdigit()) < 0x10) | |
76 | if ((j = (uint8_t) get_hexdigit()) < 0x10) { | |
77 | return (i<<4) + j; | |
78 | } | |
79 | ||
80 | return -1; | |
81 | } | |
82 | ||
83 | ||
84 | static int ihex_get_record(ihex_t *rec) | |
85 | { | |
86 | int c; | |
87 | uint8_t sum; | |
88 | ||
89 | rec->status = IHX_BROKEN; | |
90 | rec->len = 0; | |
91 | rec->type = 0xff; | |
92 | ||
93 | while ((c = my_getchar(0)) != ':') { | |
94 | if (c == 0x03) | |
95 | return -1; /* Control-C */ | |
96 | if (c == 0x04) { | |
97 | rec->status = IHX_OK; | |
98 | return 0; /*Control-D, EOF */ | |
99 | } | |
100 | } | |
101 | ||
102 | if ((c = get_hexbyte()) < 0) /* Start code */ | |
103 | return -1; | |
104 | sum = c; | |
105 | rec->len = c; | |
106 | if ((c = get_hexbyte()) < 0) /* Byte Count */ | |
107 | return -1; | |
108 | sum += c; | |
109 | rec->address = c * 256; | |
110 | if ((c = get_hexbyte()) < 0) /* Address */ | |
111 | return -1; | |
112 | sum += c; | |
113 | rec->address += c; | |
114 | if ((c = get_hexbyte()) < 0) /* Record type */ | |
115 | return -1; | |
116 | sum += c; | |
117 | rec->type = c; | |
118 | ||
119 | if (rec->len) { /* Record Data */ | |
120 | uint8_t n; | |
121 | ||
122 | for (n = 0; n < rec->len; n++) { | |
123 | if ((c = get_hexbyte()) < 0) | |
124 | break; | |
125 | sum += c; | |
126 | rec->data[n] = c; | |
127 | } | |
128 | ||
129 | if (n < rec->len) { | |
130 | return -1; | |
131 | } | |
132 | } | |
133 | ||
134 | c = get_hexbyte(); /* Check sum */ | |
135 | ||
136 | if (c >= 0) { | |
137 | sum += c; | |
138 | if (sum == 0) | |
139 | rec->status = IHX_OK; | |
140 | else | |
141 | rec->status = IHX_CHKSUMERR; | |
142 | } | |
143 | ||
144 | return rec->len; | |
145 | } | |
146 | ||
147 | ||
148 | command_ret_t do_loadihex(cmd_tbl_t *cmdtp UNUSED, uint_fast8_t flag UNUSED, int argc, char * const argv[]) | |
149 | { | |
150 | long offset = 0; | |
151 | uint32_t base_address = 0; | |
152 | uint32_t address_max = detect_ramsize(); | |
153 | uint32_t address_high = 0; | |
154 | uint32_t address_low = address_max; | |
155 | bool firstrec = true; | |
156 | ihex_t rec; | |
157 | ||
158 | if (argc > 1) | |
159 | offset = strtol(argv[1], NULL, 16); | |
160 | ||
161 | my_puts_P(PSTR("Waiting for Intel Hex Records...\n")); | |
162 | ||
163 | while (ihex_get_record(&rec) > 0 && | |
164 | rec.status == IHX_OK && | |
165 | rec.type != 1 ) { | |
166 | ||
167 | switch (rec.type) { | |
168 | case 0: /* Data record */ | |
169 | if (firstrec) { | |
170 | my_puts_P(PSTR("Loading: 0x.....")); | |
171 | firstrec = false; | |
172 | } | |
173 | if (rec.len) { | |
174 | uint32_t addr = base_address + rec.address + offset; | |
175 | if (addr < address_low) | |
176 | address_low = addr; | |
177 | if (addr+rec.len > address_high) | |
178 | address_high = addr + rec.len; | |
179 | ||
180 | // debug("low: 0x%.5lX, high: 0x%.5lX, max: 0x%.5lX, addr: 0x%.5lX, len: %d\n", | |
181 | // address_low, address_high, address_max, addr, rec.len); | |
182 | printf_P(PSTR("\b\b\b\b\b%.5lX"), addr); | |
183 | if (addr < address_max) { | |
184 | uint32_t tmplen = address_max - addr; | |
185 | if (rec.len > tmplen) | |
186 | rec.len = tmplen; | |
187 | ||
188 | if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) { | |
189 | cmd_error(CMD_RET_FAILURE, EBUSTO, NULL); | |
190 | //my_puts_P(PSTR("Bus timeout\n")); | |
191 | //return CMD_RET_FAILURE; | |
192 | } | |
193 | z80_write_block(rec.data, /* src */ | |
194 | addr, /* dest */ | |
195 | rec.len); /* len */ | |
196 | z80_bus_cmd(Release); | |
197 | } | |
198 | } | |
199 | break; | |
200 | ||
201 | #if 0 | |
202 | case 1: /* EOF record */ | |
203 | break; | |
204 | #endif | |
205 | case 2: /* Extended Segment Address Record */ | |
206 | base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 4; | |
207 | break; | |
208 | ||
209 | case 4: /* Extended Linear Address Record */ | |
210 | base_address = (uint32_t)((rec.data[0] << 8) + rec.data[1]) << 16; | |
211 | break; | |
212 | ||
213 | case 3: /* Start Segment Address Record (ignored)*/ | |
214 | case 5: /* Start Linear Address Record (ignored)*/ | |
215 | break; | |
216 | ||
217 | } | |
218 | } | |
219 | ||
220 | if (rec.status != IHX_OK) | |
221 | my_puts_P(PSTR("Broken Hex Record or loading interrupted!\n")); | |
222 | ||
223 | for (uint_fast8_t i=0; i<100; ++i) { | |
224 | /* flush input buffer */ | |
225 | while (my_getchar(0) > 0) | |
226 | ; | |
227 | udelay(1000); | |
228 | } | |
229 | ||
230 | my_puts_P(PSTR("\nData loaded: ")); | |
231 | if (address_low >= MIN(address_high, address_max)) | |
232 | my_puts_P(PSTR("None.\n")); | |
233 | else | |
234 | printf_P(PSTR("low: 0x%.5lX high: 0x%.5lX\n"), address_low, | |
235 | MIN(address_high, address_max) - 1); | |
236 | ||
237 | if (address_high > address_max) | |
238 | printf_P(PSTR("Data above highest RAM address " | |
239 | "(in range 0x%.5lX - 0x%.5lX) ignored!\n"), address_max, address_high - 1); | |
240 | ||
241 | return rec.status == IHX_OK ? CMD_RET_SUCCESS : CMD_RET_FAILURE; | |
242 | } |