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1 | 80cabfad | bellard | /*
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2 | 80cabfad | bellard | * QEMU 8259 interrupt controller emulation
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3 | 5fafdf24 | ths | *
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4 | 80cabfad | bellard | * Copyright (c) 2003-2004 Fabrice Bellard
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5 | 5fafdf24 | ths | *
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6 | 80cabfad | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 80cabfad | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 80cabfad | bellard | * in the Software without restriction, including without limitation the rights
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9 | 80cabfad | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 80cabfad | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 80cabfad | bellard | * furnished to do so, subject to the following conditions:
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12 | 80cabfad | bellard | *
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13 | 80cabfad | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 80cabfad | bellard | * all copies or substantial portions of the Software.
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15 | 80cabfad | bellard | *
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16 | 80cabfad | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 80cabfad | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 80cabfad | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 80cabfad | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 80cabfad | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 80cabfad | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 80cabfad | bellard | * THE SOFTWARE.
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23 | 80cabfad | bellard | */
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24 | 87ecb68b | pbrook | #include "hw.h" |
25 | 87ecb68b | pbrook | #include "pc.h" |
26 | 87ecb68b | pbrook | #include "isa.h" |
27 | 376253ec | aliguori | #include "monitor.h" |
28 | 0bf9e31a | Blue Swirl | #include "qemu-timer.h" |
29 | 80cabfad | bellard | |
30 | 80cabfad | bellard | /* debug PIC */
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31 | 80cabfad | bellard | //#define DEBUG_PIC
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32 | 80cabfad | bellard | |
33 | 8ac02ff8 | Blue Swirl | #ifdef DEBUG_PIC
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34 | 8ac02ff8 | Blue Swirl | #define DPRINTF(fmt, ...) \
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35 | 8ac02ff8 | Blue Swirl | do { printf("pic: " fmt , ## __VA_ARGS__); } while (0) |
36 | 8ac02ff8 | Blue Swirl | #else
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37 | 8ac02ff8 | Blue Swirl | #define DPRINTF(fmt, ...)
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38 | 8ac02ff8 | Blue Swirl | #endif
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39 | 8ac02ff8 | Blue Swirl | |
40 | b41a2cd1 | bellard | //#define DEBUG_IRQ_LATENCY
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41 | 4a0fb71e | bellard | //#define DEBUG_IRQ_COUNT
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42 | b41a2cd1 | bellard | |
43 | 80cabfad | bellard | typedef struct PicState { |
44 | 80cabfad | bellard | uint8_t last_irr; /* edge detection */
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45 | 80cabfad | bellard | uint8_t irr; /* interrupt request register */
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46 | 80cabfad | bellard | uint8_t imr; /* interrupt mask register */
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47 | 80cabfad | bellard | uint8_t isr; /* interrupt service register */
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48 | 80cabfad | bellard | uint8_t priority_add; /* highest irq priority */
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49 | 80cabfad | bellard | uint8_t irq_base; |
50 | 80cabfad | bellard | uint8_t read_reg_select; |
51 | 80cabfad | bellard | uint8_t poll; |
52 | 80cabfad | bellard | uint8_t special_mask; |
53 | 80cabfad | bellard | uint8_t init_state; |
54 | 80cabfad | bellard | uint8_t auto_eoi; |
55 | 80cabfad | bellard | uint8_t rotate_on_auto_eoi; |
56 | 80cabfad | bellard | uint8_t special_fully_nested_mode; |
57 | 80cabfad | bellard | uint8_t init4; /* true if 4 byte init */
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58 | 2053152b | ths | uint8_t single_mode; /* true if slave pic is not initialized */
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59 | 660de336 | bellard | uint8_t elcr; /* PIIX edge/trigger selection*/
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60 | 660de336 | bellard | uint8_t elcr_mask; |
61 | 3de388f6 | bellard | PicState2 *pics_state; |
62 | 80cabfad | bellard | } PicState; |
63 | 80cabfad | bellard | |
64 | 3de388f6 | bellard | struct PicState2 {
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65 | 3de388f6 | bellard | /* 0 is master pic, 1 is slave pic */
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66 | 3de388f6 | bellard | /* XXX: better separation between the two pics */
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67 | 3de388f6 | bellard | PicState pics[2];
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68 | d537cf6c | pbrook | qemu_irq parent_irq; |
69 | 3de388f6 | bellard | void *irq_request_opaque;
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70 | 3de388f6 | bellard | }; |
71 | 80cabfad | bellard | |
72 | 4a0fb71e | bellard | #if defined(DEBUG_PIC) || defined (DEBUG_IRQ_COUNT)
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73 | 4a0fb71e | bellard | static int irq_level[16]; |
74 | 4a0fb71e | bellard | #endif
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75 | 4a0fb71e | bellard | #ifdef DEBUG_IRQ_COUNT
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76 | 4a0fb71e | bellard | static uint64_t irq_count[16]; |
77 | 4a0fb71e | bellard | #endif
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78 | fbe3288d | Paolo Bonzini | PicState2 *isa_pic; |
79 | 4a0fb71e | bellard | |
80 | 80cabfad | bellard | /* set irq level. If an edge is detected, then the IRR is set to 1 */
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81 | 80cabfad | bellard | static inline void pic_set_irq1(PicState *s, int irq, int level) |
82 | 80cabfad | bellard | { |
83 | 80cabfad | bellard | int mask;
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84 | 80cabfad | bellard | mask = 1 << irq;
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85 | 660de336 | bellard | if (s->elcr & mask) {
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86 | 660de336 | bellard | /* level triggered */
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87 | 660de336 | bellard | if (level) {
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88 | 80cabfad | bellard | s->irr |= mask; |
89 | 660de336 | bellard | s->last_irr |= mask; |
90 | 660de336 | bellard | } else {
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91 | 660de336 | bellard | s->irr &= ~mask; |
92 | 660de336 | bellard | s->last_irr &= ~mask; |
93 | 660de336 | bellard | } |
94 | 80cabfad | bellard | } else {
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95 | 660de336 | bellard | /* edge triggered */
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96 | 660de336 | bellard | if (level) {
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97 | 660de336 | bellard | if ((s->last_irr & mask) == 0) |
98 | 660de336 | bellard | s->irr |= mask; |
99 | 660de336 | bellard | s->last_irr |= mask; |
100 | 660de336 | bellard | } else {
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101 | 660de336 | bellard | s->last_irr &= ~mask; |
102 | 660de336 | bellard | } |
103 | 80cabfad | bellard | } |
104 | 80cabfad | bellard | } |
105 | 80cabfad | bellard | |
106 | 80cabfad | bellard | /* return the highest priority found in mask (highest = smallest
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107 | 80cabfad | bellard | number). Return 8 if no irq */
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108 | 80cabfad | bellard | static inline int get_priority(PicState *s, int mask) |
109 | 80cabfad | bellard | { |
110 | 80cabfad | bellard | int priority;
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111 | 80cabfad | bellard | if (mask == 0) |
112 | 80cabfad | bellard | return 8; |
113 | 80cabfad | bellard | priority = 0;
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114 | 80cabfad | bellard | while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0) |
115 | 80cabfad | bellard | priority++; |
116 | 80cabfad | bellard | return priority;
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117 | 80cabfad | bellard | } |
118 | 80cabfad | bellard | |
119 | 80cabfad | bellard | /* return the pic wanted interrupt. return -1 if none */
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120 | 80cabfad | bellard | static int pic_get_irq(PicState *s) |
121 | 80cabfad | bellard | { |
122 | 80cabfad | bellard | int mask, cur_priority, priority;
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123 | 80cabfad | bellard | |
124 | 80cabfad | bellard | mask = s->irr & ~s->imr; |
125 | 80cabfad | bellard | priority = get_priority(s, mask); |
126 | 80cabfad | bellard | if (priority == 8) |
127 | 80cabfad | bellard | return -1; |
128 | 80cabfad | bellard | /* compute current priority. If special fully nested mode on the
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129 | 80cabfad | bellard | master, the IRQ coming from the slave is not taken into account
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130 | 80cabfad | bellard | for the priority computation. */
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131 | 80cabfad | bellard | mask = s->isr; |
132 | 84678711 | balrog | if (s->special_mask)
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133 | 84678711 | balrog | mask &= ~s->imr; |
134 | 3de388f6 | bellard | if (s->special_fully_nested_mode && s == &s->pics_state->pics[0]) |
135 | 80cabfad | bellard | mask &= ~(1 << 2); |
136 | 80cabfad | bellard | cur_priority = get_priority(s, mask); |
137 | 80cabfad | bellard | if (priority < cur_priority) {
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138 | 80cabfad | bellard | /* higher priority found: an irq should be generated */
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139 | 80cabfad | bellard | return (priority + s->priority_add) & 7; |
140 | 80cabfad | bellard | } else {
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141 | 80cabfad | bellard | return -1; |
142 | 80cabfad | bellard | } |
143 | 80cabfad | bellard | } |
144 | 80cabfad | bellard | |
145 | 80cabfad | bellard | /* raise irq to CPU if necessary. must be called every time the active
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146 | 80cabfad | bellard | irq may change */
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147 | 3de388f6 | bellard | /* XXX: should not export it, but it is needed for an APIC kludge */
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148 | 3de388f6 | bellard | void pic_update_irq(PicState2 *s)
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149 | 80cabfad | bellard | { |
150 | 80cabfad | bellard | int irq2, irq;
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151 | 80cabfad | bellard | |
152 | 80cabfad | bellard | /* first look at slave pic */
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153 | 3de388f6 | bellard | irq2 = pic_get_irq(&s->pics[1]);
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154 | 80cabfad | bellard | if (irq2 >= 0) { |
155 | 80cabfad | bellard | /* if irq request by slave pic, signal master PIC */
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156 | 3de388f6 | bellard | pic_set_irq1(&s->pics[0], 2, 1); |
157 | 3de388f6 | bellard | pic_set_irq1(&s->pics[0], 2, 0); |
158 | 80cabfad | bellard | } |
159 | 80cabfad | bellard | /* look at requested irq */
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160 | 3de388f6 | bellard | irq = pic_get_irq(&s->pics[0]);
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161 | 80cabfad | bellard | if (irq >= 0) { |
162 | 80cabfad | bellard | #if defined(DEBUG_PIC)
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163 | 80cabfad | bellard | { |
164 | 80cabfad | bellard | int i;
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165 | 80cabfad | bellard | for(i = 0; i < 2; i++) { |
166 | 5fafdf24 | ths | printf("pic%d: imr=%x irr=%x padd=%d\n",
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167 | 5fafdf24 | ths | i, s->pics[i].imr, s->pics[i].irr, |
168 | 3de388f6 | bellard | s->pics[i].priority_add); |
169 | 3b46e624 | ths | |
170 | 80cabfad | bellard | } |
171 | 80cabfad | bellard | } |
172 | 2444ca41 | bellard | printf("pic: cpu_interrupt\n");
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173 | 80cabfad | bellard | #endif
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174 | d537cf6c | pbrook | qemu_irq_raise(s->parent_irq); |
175 | 80cabfad | bellard | } |
176 | 4de9b249 | ths | |
177 | 4de9b249 | ths | /* all targets should do this rather than acking the IRQ in the cpu */
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178 | 29463b24 | aurel32 | #if defined(TARGET_MIPS) || defined(TARGET_PPC) || defined(TARGET_ALPHA)
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179 | 4de9b249 | ths | else {
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180 | d537cf6c | pbrook | qemu_irq_lower(s->parent_irq); |
181 | 4de9b249 | ths | } |
182 | 4de9b249 | ths | #endif
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183 | 80cabfad | bellard | } |
184 | 80cabfad | bellard | |
185 | 80cabfad | bellard | #ifdef DEBUG_IRQ_LATENCY
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186 | 80cabfad | bellard | int64_t irq_time[16];
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187 | 80cabfad | bellard | #endif
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188 | 80cabfad | bellard | |
189 | 9596ebb7 | pbrook | static void i8259_set_irq(void *opaque, int irq, int level) |
190 | 80cabfad | bellard | { |
191 | 3de388f6 | bellard | PicState2 *s = opaque; |
192 | 3de388f6 | bellard | |
193 | 4a0fb71e | bellard | #if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT)
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194 | 80cabfad | bellard | if (level != irq_level[irq]) {
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195 | 8ac02ff8 | Blue Swirl | DPRINTF("i8259_set_irq: irq=%d level=%d\n", irq, level);
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196 | 80cabfad | bellard | irq_level[irq] = level; |
197 | 4a0fb71e | bellard | #ifdef DEBUG_IRQ_COUNT
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198 | 4a0fb71e | bellard | if (level == 1) |
199 | 4a0fb71e | bellard | irq_count[irq]++; |
200 | 4a0fb71e | bellard | #endif
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201 | 80cabfad | bellard | } |
202 | 80cabfad | bellard | #endif
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203 | 80cabfad | bellard | #ifdef DEBUG_IRQ_LATENCY
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204 | 80cabfad | bellard | if (level) {
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205 | 2444ca41 | bellard | irq_time[irq] = qemu_get_clock(vm_clock); |
206 | 80cabfad | bellard | } |
207 | 80cabfad | bellard | #endif
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208 | 3de388f6 | bellard | pic_set_irq1(&s->pics[irq >> 3], irq & 7, level); |
209 | 3de388f6 | bellard | pic_update_irq(s); |
210 | 80cabfad | bellard | } |
211 | 80cabfad | bellard | |
212 | 80cabfad | bellard | /* acknowledge interrupt 'irq' */
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213 | 80cabfad | bellard | static inline void pic_intack(PicState *s, int irq) |
214 | 80cabfad | bellard | { |
215 | 80cabfad | bellard | if (s->auto_eoi) {
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216 | 80cabfad | bellard | if (s->rotate_on_auto_eoi)
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217 | 80cabfad | bellard | s->priority_add = (irq + 1) & 7; |
218 | 80cabfad | bellard | } else {
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219 | 80cabfad | bellard | s->isr |= (1 << irq);
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220 | 80cabfad | bellard | } |
221 | 0ecf89aa | bellard | /* We don't clear a level sensitive interrupt here */
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222 | 0ecf89aa | bellard | if (!(s->elcr & (1 << irq))) |
223 | 0ecf89aa | bellard | s->irr &= ~(1 << irq);
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224 | 80cabfad | bellard | } |
225 | 80cabfad | bellard | |
226 | 3de388f6 | bellard | int pic_read_irq(PicState2 *s)
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227 | 80cabfad | bellard | { |
228 | 80cabfad | bellard | int irq, irq2, intno;
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229 | 80cabfad | bellard | |
230 | 3de388f6 | bellard | irq = pic_get_irq(&s->pics[0]);
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231 | 15aeac38 | bellard | if (irq >= 0) { |
232 | 3de388f6 | bellard | pic_intack(&s->pics[0], irq);
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233 | 15aeac38 | bellard | if (irq == 2) { |
234 | 3de388f6 | bellard | irq2 = pic_get_irq(&s->pics[1]);
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235 | 15aeac38 | bellard | if (irq2 >= 0) { |
236 | 3de388f6 | bellard | pic_intack(&s->pics[1], irq2);
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237 | 15aeac38 | bellard | } else {
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238 | 15aeac38 | bellard | /* spurious IRQ on slave controller */
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239 | 15aeac38 | bellard | irq2 = 7;
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240 | 15aeac38 | bellard | } |
241 | 3de388f6 | bellard | intno = s->pics[1].irq_base + irq2;
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242 | 7f5b7d3e | Blue Swirl | #if defined(DEBUG_PIC) || defined(DEBUG_IRQ_LATENCY)
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243 | 15aeac38 | bellard | irq = irq2 + 8;
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244 | 7f5b7d3e | Blue Swirl | #endif
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245 | 15aeac38 | bellard | } else {
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246 | 3de388f6 | bellard | intno = s->pics[0].irq_base + irq;
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247 | 15aeac38 | bellard | } |
248 | 15aeac38 | bellard | } else {
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249 | 15aeac38 | bellard | /* spurious IRQ on host controller */
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250 | 15aeac38 | bellard | irq = 7;
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251 | 3de388f6 | bellard | intno = s->pics[0].irq_base + irq;
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252 | 15aeac38 | bellard | } |
253 | 3de388f6 | bellard | pic_update_irq(s); |
254 | 3b46e624 | ths | |
255 | 80cabfad | bellard | #ifdef DEBUG_IRQ_LATENCY
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256 | 5fafdf24 | ths | printf("IRQ%d latency=%0.3fus\n",
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257 | 5fafdf24 | ths | irq, |
258 | 6ee093c9 | Juan Quintela | (double)(qemu_get_clock(vm_clock) -
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259 | 6ee093c9 | Juan Quintela | irq_time[irq]) * 1000000.0 / get_ticks_per_sec()); |
260 | 80cabfad | bellard | #endif
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261 | 8ac02ff8 | Blue Swirl | DPRINTF("pic_interrupt: irq=%d\n", irq);
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262 | 80cabfad | bellard | return intno;
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263 | 80cabfad | bellard | } |
264 | 80cabfad | bellard | |
265 | d7d02e3c | bellard | static void pic_reset(void *opaque) |
266 | d7d02e3c | bellard | { |
267 | d7d02e3c | bellard | PicState *s = opaque; |
268 | d7d02e3c | bellard | |
269 | 3de388f6 | bellard | s->last_irr = 0;
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270 | 3de388f6 | bellard | s->irr = 0;
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271 | 3de388f6 | bellard | s->imr = 0;
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272 | 3de388f6 | bellard | s->isr = 0;
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273 | 3de388f6 | bellard | s->priority_add = 0;
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274 | 3de388f6 | bellard | s->irq_base = 0;
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275 | 3de388f6 | bellard | s->read_reg_select = 0;
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276 | 3de388f6 | bellard | s->poll = 0;
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277 | 3de388f6 | bellard | s->special_mask = 0;
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278 | 3de388f6 | bellard | s->init_state = 0;
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279 | 3de388f6 | bellard | s->auto_eoi = 0;
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280 | 3de388f6 | bellard | s->rotate_on_auto_eoi = 0;
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281 | 3de388f6 | bellard | s->special_fully_nested_mode = 0;
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282 | 3de388f6 | bellard | s->init4 = 0;
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283 | 2053152b | ths | s->single_mode = 0;
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284 | 4dbe19e1 | bellard | /* Note: ELCR is not reset */
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285 | d7d02e3c | bellard | } |
286 | d7d02e3c | bellard | |
287 | b41a2cd1 | bellard | static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
288 | 80cabfad | bellard | { |
289 | b41a2cd1 | bellard | PicState *s = opaque; |
290 | d7d02e3c | bellard | int priority, cmd, irq;
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291 | 80cabfad | bellard | |
292 | 8ac02ff8 | Blue Swirl | DPRINTF("write: addr=0x%02x val=0x%02x\n", addr, val);
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293 | 80cabfad | bellard | addr &= 1;
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294 | 80cabfad | bellard | if (addr == 0) { |
295 | 80cabfad | bellard | if (val & 0x10) { |
296 | 80cabfad | bellard | /* init */
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297 | d7d02e3c | bellard | pic_reset(s); |
298 | b54ad049 | bellard | /* deassert a pending interrupt */
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299 | d537cf6c | pbrook | qemu_irq_lower(s->pics_state->parent_irq); |
300 | 80cabfad | bellard | s->init_state = 1;
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301 | 80cabfad | bellard | s->init4 = val & 1;
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302 | 2053152b | ths | s->single_mode = val & 2;
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303 | 80cabfad | bellard | if (val & 0x08) |
304 | 80cabfad | bellard | hw_error("level sensitive irq not supported");
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305 | 80cabfad | bellard | } else if (val & 0x08) { |
306 | 80cabfad | bellard | if (val & 0x04) |
307 | 80cabfad | bellard | s->poll = 1;
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308 | 80cabfad | bellard | if (val & 0x02) |
309 | 80cabfad | bellard | s->read_reg_select = val & 1;
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310 | 80cabfad | bellard | if (val & 0x40) |
311 | 80cabfad | bellard | s->special_mask = (val >> 5) & 1; |
312 | 80cabfad | bellard | } else {
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313 | 80cabfad | bellard | cmd = val >> 5;
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314 | 80cabfad | bellard | switch(cmd) {
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315 | 80cabfad | bellard | case 0: |
316 | 80cabfad | bellard | case 4: |
317 | 80cabfad | bellard | s->rotate_on_auto_eoi = cmd >> 2;
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318 | 80cabfad | bellard | break;
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319 | 80cabfad | bellard | case 1: /* end of interrupt */ |
320 | 80cabfad | bellard | case 5: |
321 | 80cabfad | bellard | priority = get_priority(s, s->isr); |
322 | 80cabfad | bellard | if (priority != 8) { |
323 | 80cabfad | bellard | irq = (priority + s->priority_add) & 7;
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324 | 80cabfad | bellard | s->isr &= ~(1 << irq);
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325 | 80cabfad | bellard | if (cmd == 5) |
326 | 80cabfad | bellard | s->priority_add = (irq + 1) & 7; |
327 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
328 | 80cabfad | bellard | } |
329 | 80cabfad | bellard | break;
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330 | 80cabfad | bellard | case 3: |
331 | 80cabfad | bellard | irq = val & 7;
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332 | 80cabfad | bellard | s->isr &= ~(1 << irq);
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333 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
334 | 80cabfad | bellard | break;
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335 | 80cabfad | bellard | case 6: |
336 | 80cabfad | bellard | s->priority_add = (val + 1) & 7; |
337 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
338 | 80cabfad | bellard | break;
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339 | 80cabfad | bellard | case 7: |
340 | 80cabfad | bellard | irq = val & 7;
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341 | 80cabfad | bellard | s->isr &= ~(1 << irq);
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342 | 80cabfad | bellard | s->priority_add = (irq + 1) & 7; |
343 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
344 | 80cabfad | bellard | break;
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345 | 80cabfad | bellard | default:
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346 | 80cabfad | bellard | /* no operation */
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347 | 80cabfad | bellard | break;
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348 | 80cabfad | bellard | } |
349 | 80cabfad | bellard | } |
350 | 80cabfad | bellard | } else {
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351 | 80cabfad | bellard | switch(s->init_state) {
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352 | 80cabfad | bellard | case 0: |
353 | 80cabfad | bellard | /* normal mode */
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354 | 80cabfad | bellard | s->imr = val; |
355 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
356 | 80cabfad | bellard | break;
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357 | 80cabfad | bellard | case 1: |
358 | 80cabfad | bellard | s->irq_base = val & 0xf8;
|
359 | 2bb081f7 | ths | s->init_state = s->single_mode ? (s->init4 ? 3 : 0) : 2; |
360 | 80cabfad | bellard | break;
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361 | 80cabfad | bellard | case 2: |
362 | 80cabfad | bellard | if (s->init4) {
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363 | 80cabfad | bellard | s->init_state = 3;
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364 | 80cabfad | bellard | } else {
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365 | 80cabfad | bellard | s->init_state = 0;
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366 | 80cabfad | bellard | } |
367 | 80cabfad | bellard | break;
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368 | 80cabfad | bellard | case 3: |
369 | 80cabfad | bellard | s->special_fully_nested_mode = (val >> 4) & 1; |
370 | 80cabfad | bellard | s->auto_eoi = (val >> 1) & 1; |
371 | 80cabfad | bellard | s->init_state = 0;
|
372 | 80cabfad | bellard | break;
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373 | 80cabfad | bellard | } |
374 | 80cabfad | bellard | } |
375 | 80cabfad | bellard | } |
376 | 80cabfad | bellard | |
377 | 80cabfad | bellard | static uint32_t pic_poll_read (PicState *s, uint32_t addr1)
|
378 | 80cabfad | bellard | { |
379 | 80cabfad | bellard | int ret;
|
380 | 80cabfad | bellard | |
381 | 80cabfad | bellard | ret = pic_get_irq(s); |
382 | 80cabfad | bellard | if (ret >= 0) { |
383 | 80cabfad | bellard | if (addr1 >> 7) { |
384 | 3de388f6 | bellard | s->pics_state->pics[0].isr &= ~(1 << 2); |
385 | 3de388f6 | bellard | s->pics_state->pics[0].irr &= ~(1 << 2); |
386 | 80cabfad | bellard | } |
387 | 80cabfad | bellard | s->irr &= ~(1 << ret);
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388 | 80cabfad | bellard | s->isr &= ~(1 << ret);
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389 | 80cabfad | bellard | if (addr1 >> 7 || ret != 2) |
390 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
391 | 80cabfad | bellard | } else {
|
392 | 80cabfad | bellard | ret = 0x07;
|
393 | 3de388f6 | bellard | pic_update_irq(s->pics_state); |
394 | 80cabfad | bellard | } |
395 | 80cabfad | bellard | |
396 | 80cabfad | bellard | return ret;
|
397 | 80cabfad | bellard | } |
398 | 80cabfad | bellard | |
399 | b41a2cd1 | bellard | static uint32_t pic_ioport_read(void *opaque, uint32_t addr1) |
400 | 80cabfad | bellard | { |
401 | b41a2cd1 | bellard | PicState *s = opaque; |
402 | 80cabfad | bellard | unsigned int addr; |
403 | 80cabfad | bellard | int ret;
|
404 | 80cabfad | bellard | |
405 | 80cabfad | bellard | addr = addr1; |
406 | 80cabfad | bellard | addr &= 1;
|
407 | 80cabfad | bellard | if (s->poll) {
|
408 | 80cabfad | bellard | ret = pic_poll_read(s, addr1); |
409 | 80cabfad | bellard | s->poll = 0;
|
410 | 80cabfad | bellard | } else {
|
411 | 80cabfad | bellard | if (addr == 0) { |
412 | 80cabfad | bellard | if (s->read_reg_select)
|
413 | 80cabfad | bellard | ret = s->isr; |
414 | 80cabfad | bellard | else
|
415 | 80cabfad | bellard | ret = s->irr; |
416 | 80cabfad | bellard | } else {
|
417 | 80cabfad | bellard | ret = s->imr; |
418 | 80cabfad | bellard | } |
419 | 80cabfad | bellard | } |
420 | 8ac02ff8 | Blue Swirl | DPRINTF("read: addr=0x%02x val=0x%02x\n", addr1, ret);
|
421 | 80cabfad | bellard | return ret;
|
422 | 80cabfad | bellard | } |
423 | 80cabfad | bellard | |
424 | 80cabfad | bellard | /* memory mapped interrupt status */
|
425 | 3de388f6 | bellard | /* XXX: may be the same than pic_read_irq() */
|
426 | 3de388f6 | bellard | uint32_t pic_intack_read(PicState2 *s) |
427 | 80cabfad | bellard | { |
428 | 80cabfad | bellard | int ret;
|
429 | 80cabfad | bellard | |
430 | 3de388f6 | bellard | ret = pic_poll_read(&s->pics[0], 0x00); |
431 | 80cabfad | bellard | if (ret == 2) |
432 | 3de388f6 | bellard | ret = pic_poll_read(&s->pics[1], 0x80) + 8; |
433 | 80cabfad | bellard | /* Prepare for ISR read */
|
434 | 3de388f6 | bellard | s->pics[0].read_reg_select = 1; |
435 | 3b46e624 | ths | |
436 | 80cabfad | bellard | return ret;
|
437 | 80cabfad | bellard | } |
438 | 80cabfad | bellard | |
439 | 660de336 | bellard | static void elcr_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
440 | 660de336 | bellard | { |
441 | 660de336 | bellard | PicState *s = opaque; |
442 | 660de336 | bellard | s->elcr = val & s->elcr_mask; |
443 | 660de336 | bellard | } |
444 | 660de336 | bellard | |
445 | 660de336 | bellard | static uint32_t elcr_ioport_read(void *opaque, uint32_t addr1) |
446 | 660de336 | bellard | { |
447 | 660de336 | bellard | PicState *s = opaque; |
448 | 660de336 | bellard | return s->elcr;
|
449 | 660de336 | bellard | } |
450 | 660de336 | bellard | |
451 | 77eea838 | Juan Quintela | static const VMStateDescription vmstate_pic = { |
452 | 77eea838 | Juan Quintela | .name = "i8259",
|
453 | 77eea838 | Juan Quintela | .version_id = 1,
|
454 | 77eea838 | Juan Quintela | .minimum_version_id = 1,
|
455 | 77eea838 | Juan Quintela | .minimum_version_id_old = 1,
|
456 | 77eea838 | Juan Quintela | .fields = (VMStateField []) { |
457 | 77eea838 | Juan Quintela | VMSTATE_UINT8(last_irr, PicState), |
458 | 77eea838 | Juan Quintela | VMSTATE_UINT8(irr, PicState), |
459 | 77eea838 | Juan Quintela | VMSTATE_UINT8(imr, PicState), |
460 | 77eea838 | Juan Quintela | VMSTATE_UINT8(isr, PicState), |
461 | 77eea838 | Juan Quintela | VMSTATE_UINT8(priority_add, PicState), |
462 | 77eea838 | Juan Quintela | VMSTATE_UINT8(irq_base, PicState), |
463 | 77eea838 | Juan Quintela | VMSTATE_UINT8(read_reg_select, PicState), |
464 | 77eea838 | Juan Quintela | VMSTATE_UINT8(poll, PicState), |
465 | 77eea838 | Juan Quintela | VMSTATE_UINT8(special_mask, PicState), |
466 | 77eea838 | Juan Quintela | VMSTATE_UINT8(init_state, PicState), |
467 | 77eea838 | Juan Quintela | VMSTATE_UINT8(auto_eoi, PicState), |
468 | 77eea838 | Juan Quintela | VMSTATE_UINT8(rotate_on_auto_eoi, PicState), |
469 | 77eea838 | Juan Quintela | VMSTATE_UINT8(special_fully_nested_mode, PicState), |
470 | 77eea838 | Juan Quintela | VMSTATE_UINT8(init4, PicState), |
471 | 77eea838 | Juan Quintela | VMSTATE_UINT8(single_mode, PicState), |
472 | 77eea838 | Juan Quintela | VMSTATE_UINT8(elcr, PicState), |
473 | 77eea838 | Juan Quintela | VMSTATE_END_OF_LIST() |
474 | 77eea838 | Juan Quintela | } |
475 | 77eea838 | Juan Quintela | }; |
476 | b0a21b53 | bellard | |
477 | b0a21b53 | bellard | /* XXX: add generic master/slave system */
|
478 | 660de336 | bellard | static void pic_init1(int io_addr, int elcr_addr, PicState *s) |
479 | b0a21b53 | bellard | { |
480 | b0a21b53 | bellard | register_ioport_write(io_addr, 2, 1, pic_ioport_write, s); |
481 | b0a21b53 | bellard | register_ioport_read(io_addr, 2, 1, pic_ioport_read, s); |
482 | 660de336 | bellard | if (elcr_addr >= 0) { |
483 | 660de336 | bellard | register_ioport_write(elcr_addr, 1, 1, elcr_ioport_write, s); |
484 | 660de336 | bellard | register_ioport_read(elcr_addr, 1, 1, elcr_ioport_read, s); |
485 | 660de336 | bellard | } |
486 | 77eea838 | Juan Quintela | vmstate_register(io_addr, &vmstate_pic, s); |
487 | a08d4367 | Jan Kiszka | qemu_register_reset(pic_reset, s); |
488 | b0a21b53 | bellard | } |
489 | b0a21b53 | bellard | |
490 | 376253ec | aliguori | void pic_info(Monitor *mon)
|
491 | ba91cd80 | bellard | { |
492 | ba91cd80 | bellard | int i;
|
493 | ba91cd80 | bellard | PicState *s; |
494 | 3b46e624 | ths | |
495 | 3de388f6 | bellard | if (!isa_pic)
|
496 | 3de388f6 | bellard | return;
|
497 | ba91cd80 | bellard | |
498 | ba91cd80 | bellard | for(i=0;i<2;i++) { |
499 | 3de388f6 | bellard | s = &isa_pic->pics[i]; |
500 | 376253ec | aliguori | monitor_printf(mon, "pic%d: irr=%02x imr=%02x isr=%02x hprio=%d "
|
501 | 376253ec | aliguori | "irq_base=%02x rr_sel=%d elcr=%02x fnm=%d\n",
|
502 | 376253ec | aliguori | i, s->irr, s->imr, s->isr, s->priority_add, |
503 | 376253ec | aliguori | s->irq_base, s->read_reg_select, s->elcr, |
504 | 376253ec | aliguori | s->special_fully_nested_mode); |
505 | ba91cd80 | bellard | } |
506 | ba91cd80 | bellard | } |
507 | ba91cd80 | bellard | |
508 | 376253ec | aliguori | void irq_info(Monitor *mon)
|
509 | 4a0fb71e | bellard | { |
510 | 4a0fb71e | bellard | #ifndef DEBUG_IRQ_COUNT
|
511 | 376253ec | aliguori | monitor_printf(mon, "irq statistic code not compiled.\n");
|
512 | 4a0fb71e | bellard | #else
|
513 | 4a0fb71e | bellard | int i;
|
514 | 4a0fb71e | bellard | int64_t count; |
515 | 4a0fb71e | bellard | |
516 | 376253ec | aliguori | monitor_printf(mon, "IRQ statistics:\n");
|
517 | 4a0fb71e | bellard | for (i = 0; i < 16; i++) { |
518 | 4a0fb71e | bellard | count = irq_count[i]; |
519 | 4a0fb71e | bellard | if (count > 0) |
520 | 376253ec | aliguori | monitor_printf(mon, "%2d: %" PRId64 "\n", i, count); |
521 | 4a0fb71e | bellard | } |
522 | 4a0fb71e | bellard | #endif
|
523 | 4a0fb71e | bellard | } |
524 | ba91cd80 | bellard | |
525 | d537cf6c | pbrook | qemu_irq *i8259_init(qemu_irq parent_irq) |
526 | 80cabfad | bellard | { |
527 | 3de388f6 | bellard | PicState2 *s; |
528 | d537cf6c | pbrook | |
529 | 3de388f6 | bellard | s = qemu_mallocz(sizeof(PicState2));
|
530 | 3de388f6 | bellard | pic_init1(0x20, 0x4d0, &s->pics[0]); |
531 | 3de388f6 | bellard | pic_init1(0xa0, 0x4d1, &s->pics[1]); |
532 | 3de388f6 | bellard | s->pics[0].elcr_mask = 0xf8; |
533 | 3de388f6 | bellard | s->pics[1].elcr_mask = 0xde; |
534 | d537cf6c | pbrook | s->parent_irq = parent_irq; |
535 | 3de388f6 | bellard | s->pics[0].pics_state = s;
|
536 | 3de388f6 | bellard | s->pics[1].pics_state = s;
|
537 | d537cf6c | pbrook | isa_pic = s; |
538 | d537cf6c | pbrook | return qemu_allocate_irqs(i8259_set_irq, s, 16); |
539 | 80cabfad | bellard | } |