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1 | a541f297 | bellard | /*
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2 | a541f297 | bellard | * QEMU M48T59 NVRAM emulation for PPC PREP platform
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3 | a541f297 | bellard | *
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4 | a541f297 | bellard | * Copyright (c) 2003-2004 Jocelyn Mayer
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5 | a541f297 | bellard | *
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6 | a541f297 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | a541f297 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | a541f297 | bellard | * in the Software without restriction, including without limitation the rights
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9 | a541f297 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | a541f297 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | a541f297 | bellard | * furnished to do so, subject to the following conditions:
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12 | a541f297 | bellard | *
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13 | a541f297 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | a541f297 | bellard | * all copies or substantial portions of the Software.
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15 | a541f297 | bellard | *
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16 | a541f297 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | a541f297 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | a541f297 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | a541f297 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | a541f297 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | a541f297 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | a541f297 | bellard | * THE SOFTWARE.
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23 | a541f297 | bellard | */
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24 | a541f297 | bellard | |
25 | a541f297 | bellard | #include <stdlib.h> |
26 | a541f297 | bellard | #include <stdio.h> /* needed by vl.h */ |
27 | a541f297 | bellard | #include <stdint.h> |
28 | a541f297 | bellard | #include <string.h> |
29 | a541f297 | bellard | #include <time.h> |
30 | a541f297 | bellard | |
31 | a541f297 | bellard | #include "vl.h" |
32 | a541f297 | bellard | |
33 | a541f297 | bellard | //#define NVRAM_DEBUG
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34 | a541f297 | bellard | |
35 | a541f297 | bellard | #if defined(NVRAM_DEBUG)
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36 | a541f297 | bellard | #define NVRAM_PRINTF(fmt, args...) do { printf(fmt , ##args); } while (0) |
37 | a541f297 | bellard | #else
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38 | a541f297 | bellard | #define NVRAM_PRINTF(fmt, args...) do { } while (0) |
39 | a541f297 | bellard | #endif
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40 | a541f297 | bellard | |
41 | a541f297 | bellard | typedef struct m48t59_t { |
42 | a541f297 | bellard | /* Hardware parameters */
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43 | a541f297 | bellard | int IRQ;
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44 | a541f297 | bellard | uint32_t io_base; |
45 | a541f297 | bellard | uint16_t size; |
46 | a541f297 | bellard | /* RTC management */
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47 | a541f297 | bellard | time_t time_offset; |
48 | a541f297 | bellard | time_t stop_time; |
49 | a541f297 | bellard | /* Alarm & watchdog */
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50 | a541f297 | bellard | time_t alarm; |
51 | a541f297 | bellard | struct QEMUTimer *alrm_timer;
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52 | a541f297 | bellard | struct QEMUTimer *wd_timer;
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53 | a541f297 | bellard | /* NVRAM storage */
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54 | a541f297 | bellard | uint16_t addr; |
55 | a541f297 | bellard | uint8_t *buffer; |
56 | a541f297 | bellard | } m48t59_t; |
57 | a541f297 | bellard | |
58 | a541f297 | bellard | static m48t59_t *NVRAMs;
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59 | a541f297 | bellard | static int nb_NVRAMs; |
60 | a541f297 | bellard | |
61 | a541f297 | bellard | /* Fake timer functions */
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62 | a541f297 | bellard | /* Generic helpers for BCD */
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63 | a541f297 | bellard | static inline uint8_t toBCD (uint8_t value) |
64 | a541f297 | bellard | { |
65 | a541f297 | bellard | return (((value / 10) % 10) << 4) | (value % 10); |
66 | a541f297 | bellard | } |
67 | a541f297 | bellard | |
68 | a541f297 | bellard | static inline uint8_t fromBCD (uint8_t BCD) |
69 | a541f297 | bellard | { |
70 | a541f297 | bellard | return ((BCD >> 4) * 10) + (BCD & 0x0F); |
71 | a541f297 | bellard | } |
72 | a541f297 | bellard | |
73 | a541f297 | bellard | /* RTC management helpers */
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74 | a541f297 | bellard | static void get_time (m48t59_t *NVRAM, struct tm *tm) |
75 | a541f297 | bellard | { |
76 | a541f297 | bellard | time_t t; |
77 | a541f297 | bellard | |
78 | a541f297 | bellard | t = time(NULL) + NVRAM->time_offset;
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79 | a541f297 | bellard | localtime_r(&t, tm); |
80 | a541f297 | bellard | } |
81 | a541f297 | bellard | |
82 | a541f297 | bellard | static void set_time (m48t59_t *NVRAM, struct tm *tm) |
83 | a541f297 | bellard | { |
84 | a541f297 | bellard | time_t now, new_time; |
85 | a541f297 | bellard | |
86 | a541f297 | bellard | new_time = mktime(tm); |
87 | a541f297 | bellard | now = time(NULL);
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88 | a541f297 | bellard | NVRAM->time_offset = new_time - now; |
89 | a541f297 | bellard | } |
90 | a541f297 | bellard | |
91 | a541f297 | bellard | /* Alarm management */
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92 | a541f297 | bellard | static void alarm_cb (void *opaque) |
93 | a541f297 | bellard | { |
94 | a541f297 | bellard | struct tm tm, tm_now;
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95 | a541f297 | bellard | uint64_t next_time; |
96 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
97 | a541f297 | bellard | |
98 | a541f297 | bellard | pic_set_irq(NVRAM->IRQ, 1);
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99 | a541f297 | bellard | if ((NVRAM->buffer[0x1FF5] & 0x80) == 0 && |
100 | a541f297 | bellard | (NVRAM->buffer[0x1FF4] & 0x80) == 0 && |
101 | a541f297 | bellard | (NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
102 | a541f297 | bellard | (NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
103 | a541f297 | bellard | /* Repeat once a month */
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104 | a541f297 | bellard | get_time(NVRAM, &tm_now); |
105 | a541f297 | bellard | memcpy(&tm, &tm_now, sizeof(struct tm)); |
106 | a541f297 | bellard | tm.tm_mon++; |
107 | a541f297 | bellard | if (tm.tm_mon == 13) { |
108 | a541f297 | bellard | tm.tm_mon = 1;
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109 | a541f297 | bellard | tm.tm_year++; |
110 | a541f297 | bellard | } |
111 | a541f297 | bellard | next_time = mktime(&tm); |
112 | a541f297 | bellard | } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
113 | a541f297 | bellard | (NVRAM->buffer[0x1FF4] & 0x80) == 0 && |
114 | a541f297 | bellard | (NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
115 | a541f297 | bellard | (NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
116 | a541f297 | bellard | /* Repeat once a day */
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117 | a541f297 | bellard | next_time = 24 * 60 * 60 + mktime(&tm_now); |
118 | a541f297 | bellard | } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
119 | a541f297 | bellard | (NVRAM->buffer[0x1FF4] & 0x80) != 0 && |
120 | a541f297 | bellard | (NVRAM->buffer[0x1FF3] & 0x80) == 0 && |
121 | a541f297 | bellard | (NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
122 | a541f297 | bellard | /* Repeat once an hour */
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123 | a541f297 | bellard | next_time = 60 * 60 + mktime(&tm_now); |
124 | a541f297 | bellard | } else if ((NVRAM->buffer[0x1FF5] & 0x80) != 0 && |
125 | a541f297 | bellard | (NVRAM->buffer[0x1FF4] & 0x80) != 0 && |
126 | a541f297 | bellard | (NVRAM->buffer[0x1FF3] & 0x80) != 0 && |
127 | a541f297 | bellard | (NVRAM->buffer[0x1FF2] & 0x80) == 0) { |
128 | a541f297 | bellard | /* Repeat once a minute */
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129 | a541f297 | bellard | next_time = 60 + mktime(&tm_now);
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130 | a541f297 | bellard | } else {
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131 | a541f297 | bellard | /* Repeat once a second */
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132 | a541f297 | bellard | next_time = 1 + mktime(&tm_now);
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133 | a541f297 | bellard | } |
134 | a541f297 | bellard | qemu_mod_timer(NVRAM->alrm_timer, next_time * 1000);
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135 | a541f297 | bellard | pic_set_irq(NVRAM->IRQ, 0);
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136 | a541f297 | bellard | } |
137 | a541f297 | bellard | |
138 | a541f297 | bellard | |
139 | a541f297 | bellard | static void get_alarm (m48t59_t *NVRAM, struct tm *tm) |
140 | a541f297 | bellard | { |
141 | a541f297 | bellard | localtime_r(&NVRAM->alarm, tm); |
142 | a541f297 | bellard | } |
143 | a541f297 | bellard | |
144 | a541f297 | bellard | static void set_alarm (m48t59_t *NVRAM, struct tm *tm) |
145 | a541f297 | bellard | { |
146 | a541f297 | bellard | NVRAM->alarm = mktime(tm); |
147 | a541f297 | bellard | if (NVRAM->alrm_timer != NULL) { |
148 | a541f297 | bellard | qemu_del_timer(NVRAM->alrm_timer); |
149 | a541f297 | bellard | NVRAM->alrm_timer = NULL;
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150 | a541f297 | bellard | } |
151 | a541f297 | bellard | if (NVRAM->alarm - time(NULL) > 0) |
152 | a541f297 | bellard | qemu_mod_timer(NVRAM->alrm_timer, NVRAM->alarm * 1000);
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153 | a541f297 | bellard | } |
154 | a541f297 | bellard | |
155 | a541f297 | bellard | /* Watchdog management */
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156 | a541f297 | bellard | static void watchdog_cb (void *opaque) |
157 | a541f297 | bellard | { |
158 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
159 | a541f297 | bellard | |
160 | a541f297 | bellard | NVRAM->buffer[0x1FF0] |= 0x80; |
161 | a541f297 | bellard | if (NVRAM->buffer[0x1FF7] & 0x80) { |
162 | a541f297 | bellard | NVRAM->buffer[0x1FF7] = 0x00; |
163 | a541f297 | bellard | NVRAM->buffer[0x1FFC] &= ~0x40; |
164 | a541f297 | bellard | // reset_CPU();
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165 | a541f297 | bellard | } else {
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166 | a541f297 | bellard | pic_set_irq(NVRAM->IRQ, 1);
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167 | a541f297 | bellard | pic_set_irq(NVRAM->IRQ, 0);
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168 | a541f297 | bellard | } |
169 | a541f297 | bellard | } |
170 | a541f297 | bellard | |
171 | a541f297 | bellard | static void set_up_watchdog (m48t59_t *NVRAM, uint8_t value) |
172 | a541f297 | bellard | { |
173 | a541f297 | bellard | uint64_t interval; /* in 1/16 seconds */
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174 | a541f297 | bellard | |
175 | a541f297 | bellard | if (NVRAM->wd_timer != NULL) { |
176 | a541f297 | bellard | qemu_del_timer(NVRAM->wd_timer); |
177 | a541f297 | bellard | NVRAM->wd_timer = NULL;
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178 | a541f297 | bellard | } |
179 | a541f297 | bellard | NVRAM->buffer[0x1FF0] &= ~0x80; |
180 | a541f297 | bellard | if (value != 0) { |
181 | a541f297 | bellard | interval = (1 << (2 * (value & 0x03))) * ((value >> 2) & 0x1F); |
182 | a541f297 | bellard | qemu_mod_timer(NVRAM->wd_timer, ((uint64_t)time(NULL) * 1000) + |
183 | a541f297 | bellard | ((interval * 1000) >> 4)); |
184 | a541f297 | bellard | } |
185 | a541f297 | bellard | } |
186 | a541f297 | bellard | |
187 | a541f297 | bellard | /* Direct access to NVRAM */
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188 | a541f297 | bellard | void m48t59_write (void *opaque, uint32_t val) |
189 | a541f297 | bellard | { |
190 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
191 | a541f297 | bellard | struct tm tm;
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192 | a541f297 | bellard | int tmp;
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193 | a541f297 | bellard | |
194 | a541f297 | bellard | if (NVRAM->addr > 0x1FF8 && NVRAM->addr < 0x2000) |
195 | a541f297 | bellard | NVRAM_PRINTF("%s: 0x%08x => 0x%08x\n", __func__, NVRAM->addr, val);
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196 | a541f297 | bellard | switch (NVRAM->addr) {
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197 | a541f297 | bellard | case 0x1FF0: |
198 | a541f297 | bellard | /* flags register : read-only */
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199 | a541f297 | bellard | break;
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200 | a541f297 | bellard | case 0x1FF1: |
201 | a541f297 | bellard | /* unused */
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202 | a541f297 | bellard | break;
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203 | a541f297 | bellard | case 0x1FF2: |
204 | a541f297 | bellard | /* alarm seconds */
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205 | a541f297 | bellard | tmp = fromBCD(val & 0x7F);
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206 | a541f297 | bellard | if (tmp >= 0 && tmp <= 59) { |
207 | a541f297 | bellard | get_alarm(NVRAM, &tm); |
208 | a541f297 | bellard | tm.tm_sec = tmp; |
209 | a541f297 | bellard | NVRAM->buffer[0x1FF2] = val;
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210 | a541f297 | bellard | set_alarm(NVRAM, &tm); |
211 | a541f297 | bellard | } |
212 | a541f297 | bellard | break;
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213 | a541f297 | bellard | case 0x1FF3: |
214 | a541f297 | bellard | /* alarm minutes */
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215 | a541f297 | bellard | tmp = fromBCD(val & 0x7F);
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216 | a541f297 | bellard | if (tmp >= 0 && tmp <= 59) { |
217 | a541f297 | bellard | get_alarm(NVRAM, &tm); |
218 | a541f297 | bellard | tm.tm_min = tmp; |
219 | a541f297 | bellard | NVRAM->buffer[0x1FF3] = val;
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220 | a541f297 | bellard | set_alarm(NVRAM, &tm); |
221 | a541f297 | bellard | } |
222 | a541f297 | bellard | break;
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223 | a541f297 | bellard | case 0x1FF4: |
224 | a541f297 | bellard | /* alarm hours */
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225 | a541f297 | bellard | tmp = fromBCD(val & 0x3F);
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226 | a541f297 | bellard | if (tmp >= 0 && tmp <= 23) { |
227 | a541f297 | bellard | get_alarm(NVRAM, &tm); |
228 | a541f297 | bellard | tm.tm_hour = tmp; |
229 | a541f297 | bellard | NVRAM->buffer[0x1FF4] = val;
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230 | a541f297 | bellard | set_alarm(NVRAM, &tm); |
231 | a541f297 | bellard | } |
232 | a541f297 | bellard | break;
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233 | a541f297 | bellard | case 0x1FF5: |
234 | a541f297 | bellard | /* alarm date */
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235 | a541f297 | bellard | tmp = fromBCD(val & 0x1F);
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236 | a541f297 | bellard | if (tmp != 0) { |
237 | a541f297 | bellard | get_alarm(NVRAM, &tm); |
238 | a541f297 | bellard | tm.tm_mday = tmp; |
239 | a541f297 | bellard | NVRAM->buffer[0x1FF5] = val;
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240 | a541f297 | bellard | set_alarm(NVRAM, &tm); |
241 | a541f297 | bellard | } |
242 | a541f297 | bellard | break;
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243 | a541f297 | bellard | case 0x1FF6: |
244 | a541f297 | bellard | /* interrupts */
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245 | a541f297 | bellard | NVRAM->buffer[0x1FF6] = val;
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246 | a541f297 | bellard | break;
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247 | a541f297 | bellard | case 0x1FF7: |
248 | a541f297 | bellard | /* watchdog */
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249 | a541f297 | bellard | NVRAM->buffer[0x1FF7] = val;
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250 | a541f297 | bellard | set_up_watchdog(NVRAM, val); |
251 | a541f297 | bellard | break;
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252 | a541f297 | bellard | case 0x1FF8: |
253 | a541f297 | bellard | /* control */
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254 | a541f297 | bellard | NVRAM->buffer[0x1FF8] = (val & ~0xA0) | 0x90; |
255 | a541f297 | bellard | break;
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256 | a541f297 | bellard | case 0x1FF9: |
257 | a541f297 | bellard | /* seconds (BCD) */
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258 | a541f297 | bellard | tmp = fromBCD(val & 0x7F);
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259 | a541f297 | bellard | if (tmp >= 0 && tmp <= 59) { |
260 | a541f297 | bellard | get_time(NVRAM, &tm); |
261 | a541f297 | bellard | tm.tm_sec = tmp; |
262 | a541f297 | bellard | set_time(NVRAM, &tm); |
263 | a541f297 | bellard | } |
264 | a541f297 | bellard | if ((val & 0x80) ^ (NVRAM->buffer[0x1FF9] & 0x80)) { |
265 | a541f297 | bellard | if (val & 0x80) { |
266 | a541f297 | bellard | NVRAM->stop_time = time(NULL);
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267 | a541f297 | bellard | } else {
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268 | a541f297 | bellard | NVRAM->time_offset += NVRAM->stop_time - time(NULL);
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269 | a541f297 | bellard | NVRAM->stop_time = 0;
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270 | a541f297 | bellard | } |
271 | a541f297 | bellard | } |
272 | a541f297 | bellard | NVRAM->buffer[0x1FF9] = val & 0x80; |
273 | a541f297 | bellard | break;
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274 | a541f297 | bellard | case 0x1FFA: |
275 | a541f297 | bellard | /* minutes (BCD) */
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276 | a541f297 | bellard | tmp = fromBCD(val & 0x7F);
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277 | a541f297 | bellard | if (tmp >= 0 && tmp <= 59) { |
278 | a541f297 | bellard | get_time(NVRAM, &tm); |
279 | a541f297 | bellard | tm.tm_min = tmp; |
280 | a541f297 | bellard | set_time(NVRAM, &tm); |
281 | a541f297 | bellard | } |
282 | a541f297 | bellard | break;
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283 | a541f297 | bellard | case 0x1FFB: |
284 | a541f297 | bellard | /* hours (BCD) */
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285 | a541f297 | bellard | tmp = fromBCD(val & 0x3F);
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286 | a541f297 | bellard | if (tmp >= 0 && tmp <= 23) { |
287 | a541f297 | bellard | get_time(NVRAM, &tm); |
288 | a541f297 | bellard | tm.tm_hour = tmp; |
289 | a541f297 | bellard | set_time(NVRAM, &tm); |
290 | a541f297 | bellard | } |
291 | a541f297 | bellard | break;
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292 | a541f297 | bellard | case 0x1FFC: |
293 | a541f297 | bellard | /* day of the week / century */
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294 | a541f297 | bellard | tmp = fromBCD(val & 0x07);
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295 | a541f297 | bellard | get_time(NVRAM, &tm); |
296 | a541f297 | bellard | tm.tm_wday = tmp; |
297 | a541f297 | bellard | set_time(NVRAM, &tm); |
298 | a541f297 | bellard | NVRAM->buffer[0x1FFC] = val & 0x40; |
299 | a541f297 | bellard | break;
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300 | a541f297 | bellard | case 0x1FFD: |
301 | a541f297 | bellard | /* date */
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302 | a541f297 | bellard | tmp = fromBCD(val & 0x1F);
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303 | a541f297 | bellard | if (tmp != 0) { |
304 | a541f297 | bellard | get_time(NVRAM, &tm); |
305 | a541f297 | bellard | tm.tm_mday = tmp; |
306 | a541f297 | bellard | set_time(NVRAM, &tm); |
307 | a541f297 | bellard | } |
308 | a541f297 | bellard | break;
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309 | a541f297 | bellard | case 0x1FFE: |
310 | a541f297 | bellard | /* month */
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311 | a541f297 | bellard | tmp = fromBCD(val & 0x1F);
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312 | a541f297 | bellard | if (tmp >= 1 && tmp <= 12) { |
313 | a541f297 | bellard | get_time(NVRAM, &tm); |
314 | a541f297 | bellard | tm.tm_mon = tmp - 1;
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315 | a541f297 | bellard | set_time(NVRAM, &tm); |
316 | a541f297 | bellard | } |
317 | a541f297 | bellard | break;
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318 | a541f297 | bellard | case 0x1FFF: |
319 | a541f297 | bellard | /* year */
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320 | a541f297 | bellard | tmp = fromBCD(val); |
321 | a541f297 | bellard | if (tmp >= 0 && tmp <= 99) { |
322 | a541f297 | bellard | get_time(NVRAM, &tm); |
323 | a541f297 | bellard | tm.tm_year = fromBCD(val); |
324 | a541f297 | bellard | set_time(NVRAM, &tm); |
325 | a541f297 | bellard | } |
326 | a541f297 | bellard | break;
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327 | a541f297 | bellard | default:
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328 | a541f297 | bellard | if (NVRAM->addr < 0x1FF0 || |
329 | a541f297 | bellard | (NVRAM->addr > 0x1FFF && NVRAM->addr < NVRAM->size)) {
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330 | a541f297 | bellard | NVRAM->buffer[NVRAM->addr] = val & 0xFF;
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331 | a541f297 | bellard | } |
332 | a541f297 | bellard | break;
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333 | a541f297 | bellard | } |
334 | a541f297 | bellard | } |
335 | a541f297 | bellard | |
336 | a541f297 | bellard | uint32_t m48t59_read (void *opaque)
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337 | a541f297 | bellard | { |
338 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
339 | a541f297 | bellard | struct tm tm;
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340 | a541f297 | bellard | uint32_t retval = 0xFF;
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341 | a541f297 | bellard | |
342 | a541f297 | bellard | switch (NVRAM->addr) {
|
343 | a541f297 | bellard | case 0x1FF0: |
344 | a541f297 | bellard | /* flags register */
|
345 | a541f297 | bellard | goto do_read;
|
346 | a541f297 | bellard | case 0x1FF1: |
347 | a541f297 | bellard | /* unused */
|
348 | a541f297 | bellard | retval = 0;
|
349 | a541f297 | bellard | break;
|
350 | a541f297 | bellard | case 0x1FF2: |
351 | a541f297 | bellard | /* alarm seconds */
|
352 | a541f297 | bellard | goto do_read;
|
353 | a541f297 | bellard | case 0x1FF3: |
354 | a541f297 | bellard | /* alarm minutes */
|
355 | a541f297 | bellard | goto do_read;
|
356 | a541f297 | bellard | case 0x1FF4: |
357 | a541f297 | bellard | /* alarm hours */
|
358 | a541f297 | bellard | goto do_read;
|
359 | a541f297 | bellard | case 0x1FF5: |
360 | a541f297 | bellard | /* alarm date */
|
361 | a541f297 | bellard | goto do_read;
|
362 | a541f297 | bellard | case 0x1FF6: |
363 | a541f297 | bellard | /* interrupts */
|
364 | a541f297 | bellard | goto do_read;
|
365 | a541f297 | bellard | case 0x1FF7: |
366 | a541f297 | bellard | /* A read resets the watchdog */
|
367 | a541f297 | bellard | set_up_watchdog(NVRAM, NVRAM->buffer[0x1FF7]);
|
368 | a541f297 | bellard | goto do_read;
|
369 | a541f297 | bellard | case 0x1FF8: |
370 | a541f297 | bellard | /* control */
|
371 | a541f297 | bellard | goto do_read;
|
372 | a541f297 | bellard | case 0x1FF9: |
373 | a541f297 | bellard | /* seconds (BCD) */
|
374 | a541f297 | bellard | get_time(NVRAM, &tm); |
375 | a541f297 | bellard | retval = (NVRAM->buffer[0x1FF9] & 0x80) | toBCD(tm.tm_sec); |
376 | a541f297 | bellard | break;
|
377 | a541f297 | bellard | case 0x1FFA: |
378 | a541f297 | bellard | /* minutes (BCD) */
|
379 | a541f297 | bellard | get_time(NVRAM, &tm); |
380 | a541f297 | bellard | retval = toBCD(tm.tm_min); |
381 | a541f297 | bellard | break;
|
382 | a541f297 | bellard | case 0x1FFB: |
383 | a541f297 | bellard | /* hours (BCD) */
|
384 | a541f297 | bellard | get_time(NVRAM, &tm); |
385 | a541f297 | bellard | retval = toBCD(tm.tm_hour); |
386 | a541f297 | bellard | break;
|
387 | a541f297 | bellard | case 0x1FFC: |
388 | a541f297 | bellard | /* day of the week / century */
|
389 | a541f297 | bellard | get_time(NVRAM, &tm); |
390 | a541f297 | bellard | retval = NVRAM->buffer[0x1FFC] | tm.tm_wday;
|
391 | a541f297 | bellard | break;
|
392 | a541f297 | bellard | case 0x1FFD: |
393 | a541f297 | bellard | /* date */
|
394 | a541f297 | bellard | get_time(NVRAM, &tm); |
395 | a541f297 | bellard | retval = toBCD(tm.tm_mday); |
396 | a541f297 | bellard | break;
|
397 | a541f297 | bellard | case 0x1FFE: |
398 | a541f297 | bellard | /* month */
|
399 | a541f297 | bellard | get_time(NVRAM, &tm); |
400 | a541f297 | bellard | retval = toBCD(tm.tm_mon + 1);
|
401 | a541f297 | bellard | break;
|
402 | a541f297 | bellard | case 0x1FFF: |
403 | a541f297 | bellard | /* year */
|
404 | a541f297 | bellard | get_time(NVRAM, &tm); |
405 | a541f297 | bellard | retval = toBCD(tm.tm_year); |
406 | a541f297 | bellard | break;
|
407 | a541f297 | bellard | default:
|
408 | a541f297 | bellard | if (NVRAM->addr < 0x1FF0 || |
409 | a541f297 | bellard | (NVRAM->addr > 0x1FFF && NVRAM->addr < NVRAM->size)) {
|
410 | a541f297 | bellard | do_read:
|
411 | a541f297 | bellard | retval = NVRAM->buffer[NVRAM->addr]; |
412 | a541f297 | bellard | } |
413 | a541f297 | bellard | break;
|
414 | a541f297 | bellard | } |
415 | a541f297 | bellard | if (NVRAM->addr > 0x1FF9 && NVRAM->addr < 0x2000) |
416 | a541f297 | bellard | NVRAM_PRINTF("0x%08x <= 0x%08x\n", NVRAM->addr, retval);
|
417 | a541f297 | bellard | |
418 | a541f297 | bellard | return retval;
|
419 | a541f297 | bellard | } |
420 | a541f297 | bellard | |
421 | a541f297 | bellard | void m48t59_set_addr (void *opaque, uint32_t addr) |
422 | a541f297 | bellard | { |
423 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
424 | a541f297 | bellard | |
425 | a541f297 | bellard | NVRAM->addr = addr; |
426 | a541f297 | bellard | } |
427 | a541f297 | bellard | |
428 | a541f297 | bellard | /* IO access to NVRAM */
|
429 | a541f297 | bellard | static void NVRAM_writeb (void *opaque, uint32_t addr, uint32_t val) |
430 | a541f297 | bellard | { |
431 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
432 | a541f297 | bellard | |
433 | a541f297 | bellard | addr -= NVRAM->io_base; |
434 | a541f297 | bellard | switch (addr) {
|
435 | a541f297 | bellard | case 0: |
436 | a541f297 | bellard | NVRAM->addr &= ~0x00FF;
|
437 | a541f297 | bellard | NVRAM->addr |= val; |
438 | a541f297 | bellard | break;
|
439 | a541f297 | bellard | case 1: |
440 | a541f297 | bellard | NVRAM->addr &= ~0xFF00;
|
441 | a541f297 | bellard | NVRAM->addr |= val << 8;
|
442 | a541f297 | bellard | break;
|
443 | a541f297 | bellard | case 3: |
444 | a541f297 | bellard | m48t59_write(NVRAM, val); |
445 | a541f297 | bellard | NVRAM->addr = 0x0000;
|
446 | a541f297 | bellard | break;
|
447 | a541f297 | bellard | default:
|
448 | a541f297 | bellard | break;
|
449 | a541f297 | bellard | } |
450 | a541f297 | bellard | } |
451 | a541f297 | bellard | |
452 | a541f297 | bellard | static uint32_t NVRAM_readb (void *opaque, uint32_t addr) |
453 | a541f297 | bellard | { |
454 | a541f297 | bellard | m48t59_t *NVRAM = opaque; |
455 | a541f297 | bellard | |
456 | a541f297 | bellard | if (addr == NVRAM->io_base + 3) |
457 | a541f297 | bellard | return m48t59_read(NVRAM);
|
458 | a541f297 | bellard | |
459 | a541f297 | bellard | return 0xFF; |
460 | a541f297 | bellard | } |
461 | a541f297 | bellard | |
462 | a541f297 | bellard | /* Initialisation routine */
|
463 | a541f297 | bellard | void *m48t59_init (int IRQ, uint32_t io_base, uint16_t size) |
464 | a541f297 | bellard | { |
465 | a541f297 | bellard | m48t59_t *tmp; |
466 | a541f297 | bellard | |
467 | a541f297 | bellard | tmp = realloc(NVRAMs, (nb_NVRAMs + 1) * sizeof(m48t59_t)); |
468 | a541f297 | bellard | if (tmp == NULL) |
469 | a541f297 | bellard | return NULL; |
470 | a541f297 | bellard | NVRAMs = tmp; |
471 | a541f297 | bellard | tmp[nb_NVRAMs].buffer = malloc(size); |
472 | a541f297 | bellard | if (tmp[nb_NVRAMs].buffer == NULL) |
473 | a541f297 | bellard | return NULL; |
474 | a541f297 | bellard | memset(tmp[nb_NVRAMs].buffer, 0, size);
|
475 | a541f297 | bellard | tmp[nb_NVRAMs].IRQ = IRQ; |
476 | a541f297 | bellard | tmp[nb_NVRAMs].size = size; |
477 | a541f297 | bellard | tmp[nb_NVRAMs].io_base = io_base; |
478 | a541f297 | bellard | tmp[nb_NVRAMs].addr = 0;
|
479 | a541f297 | bellard | register_ioport_read(io_base, 0x04, 1, NVRAM_readb, &NVRAMs[nb_NVRAMs]); |
480 | a541f297 | bellard | register_ioport_write(io_base, 0x04, 1, NVRAM_writeb, &NVRAMs[nb_NVRAMs]); |
481 | a541f297 | bellard | tmp[nb_NVRAMs].alrm_timer = qemu_new_timer(vm_clock, &alarm_cb, |
482 | a541f297 | bellard | &tmp[nb_NVRAMs]); |
483 | a541f297 | bellard | tmp[nb_NVRAMs].wd_timer = qemu_new_timer(vm_clock, &watchdog_cb, |
484 | a541f297 | bellard | &tmp[nb_NVRAMs]); |
485 | a541f297 | bellard | return &NVRAMs[nb_NVRAMs++];
|
486 | a541f297 | bellard | } |