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3475187d FB |
1 | /* |
2 | * QEMU Sparc SLAVIO aux io port emulation | |
3 | * | |
4 | * Copyright (c) 2005 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include "vl.h" | |
25 | /* debug misc */ | |
26 | //#define DEBUG_MISC | |
27 | ||
28 | /* | |
29 | * This is the auxio port, chip control and system control part of | |
30 | * chip STP2001 (Slave I/O), also produced as NCR89C105. See | |
31 | * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt | |
32 | * | |
33 | * This also includes the PMC CPU idle controller. | |
34 | */ | |
35 | ||
36 | #ifdef DEBUG_MISC | |
37 | #define MISC_DPRINTF(fmt, args...) \ | |
38 | do { printf("MISC: " fmt , ##args); } while (0) | |
39 | #else | |
40 | #define MISC_DPRINTF(fmt, args...) | |
41 | #endif | |
42 | ||
43 | typedef struct MiscState { | |
44 | int irq; | |
45 | uint8_t config; | |
46 | uint8_t aux1, aux2; | |
47 | uint8_t diag, mctrl; | |
48 | } MiscState; | |
49 | ||
50 | #define MISC_MAXADDR 1 | |
51 | ||
52 | static void slavio_misc_update_irq(void *opaque) | |
53 | { | |
54 | MiscState *s = opaque; | |
55 | ||
56 | if ((s->aux2 & 0x4) && (s->config & 0x8)) { | |
57 | pic_set_irq(s->irq, 1); | |
58 | } else { | |
59 | pic_set_irq(s->irq, 0); | |
60 | } | |
61 | } | |
62 | ||
63 | static void slavio_misc_reset(void *opaque) | |
64 | { | |
65 | MiscState *s = opaque; | |
66 | ||
67 | // Diagnostic register not cleared in reset | |
68 | s->config = s->aux1 = s->aux2 = s->mctrl = 0; | |
69 | } | |
70 | ||
71 | void slavio_set_power_fail(void *opaque, int power_failing) | |
72 | { | |
73 | MiscState *s = opaque; | |
74 | ||
75 | MISC_DPRINTF("Power fail: %d, config: %d\n", power_failing, s->config); | |
76 | if (power_failing && (s->config & 0x8)) { | |
77 | s->aux2 |= 0x4; | |
78 | } else { | |
79 | s->aux2 &= ~0x4; | |
80 | } | |
81 | slavio_misc_update_irq(s); | |
82 | } | |
83 | ||
84 | static void slavio_misc_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) | |
85 | { | |
86 | MiscState *s = opaque; | |
87 | ||
88 | switch (addr & 0xfff0000) { | |
89 | case 0x1800000: | |
90 | MISC_DPRINTF("Write config %2.2x\n", val & 0xff); | |
91 | s->config = val & 0xff; | |
92 | slavio_misc_update_irq(s); | |
93 | break; | |
94 | case 0x1900000: | |
95 | MISC_DPRINTF("Write aux1 %2.2x\n", val & 0xff); | |
96 | s->aux1 = val & 0xff; | |
97 | break; | |
98 | case 0x1910000: | |
99 | val &= 0x3; | |
100 | MISC_DPRINTF("Write aux2 %2.2x\n", val); | |
101 | val |= s->aux2 & 0x4; | |
102 | if (val & 0x2) // Clear Power Fail int | |
103 | val &= 0x1; | |
104 | s->aux2 = val; | |
105 | if (val & 1) | |
106 | qemu_system_shutdown_request(); | |
107 | slavio_misc_update_irq(s); | |
108 | break; | |
109 | case 0x1a00000: | |
110 | MISC_DPRINTF("Write diag %2.2x\n", val & 0xff); | |
111 | s->diag = val & 0xff; | |
112 | break; | |
113 | case 0x1b00000: | |
114 | MISC_DPRINTF("Write modem control %2.2x\n", val & 0xff); | |
115 | s->mctrl = val & 0xff; | |
116 | break; | |
117 | case 0x1f00000: | |
118 | MISC_DPRINTF("Write system control %2.2x\n", val & 0xff); | |
119 | if (val & 1) | |
120 | qemu_system_reset_request(); | |
121 | break; | |
122 | case 0xa000000: | |
123 | MISC_DPRINTF("Write power management %2.2x\n", val & 0xff); | |
124 | #if 0 | |
125 | // XXX: halting CPU does not work | |
126 | raise_exception(EXCP_HLT); | |
127 | cpu_loop_exit(); | |
128 | #endif | |
129 | break; | |
130 | } | |
131 | } | |
132 | ||
133 | static uint32_t slavio_misc_mem_readb(void *opaque, target_phys_addr_t addr) | |
134 | { | |
135 | MiscState *s = opaque; | |
136 | uint32_t ret = 0; | |
137 | ||
138 | switch (addr & 0xfff0000) { | |
139 | case 0x1800000: | |
140 | ret = s->config; | |
141 | MISC_DPRINTF("Read config %2.2x\n", ret); | |
142 | break; | |
143 | case 0x1900000: | |
144 | ret = s->aux1; | |
145 | MISC_DPRINTF("Read aux1 %2.2x\n", ret); | |
146 | break; | |
147 | case 0x1910000: | |
148 | ret = s->aux2; | |
149 | MISC_DPRINTF("Read aux2 %2.2x\n", ret); | |
150 | break; | |
151 | case 0x1a00000: | |
152 | ret = s->diag; | |
153 | MISC_DPRINTF("Read diag %2.2x\n", ret); | |
154 | break; | |
155 | case 0x1b00000: | |
156 | ret = s->mctrl; | |
157 | MISC_DPRINTF("Read modem control %2.2x\n", ret); | |
158 | break; | |
159 | case 0x1f00000: | |
160 | MISC_DPRINTF("Read system control %2.2x\n", ret); | |
161 | break; | |
162 | case 0xa000000: | |
163 | MISC_DPRINTF("Read power management %2.2x\n", ret); | |
164 | break; | |
165 | } | |
166 | return ret; | |
167 | } | |
168 | ||
169 | static CPUReadMemoryFunc *slavio_misc_mem_read[3] = { | |
170 | slavio_misc_mem_readb, | |
171 | slavio_misc_mem_readb, | |
172 | slavio_misc_mem_readb, | |
173 | }; | |
174 | ||
175 | static CPUWriteMemoryFunc *slavio_misc_mem_write[3] = { | |
176 | slavio_misc_mem_writeb, | |
177 | slavio_misc_mem_writeb, | |
178 | slavio_misc_mem_writeb, | |
179 | }; | |
180 | ||
181 | static void slavio_misc_save(QEMUFile *f, void *opaque) | |
182 | { | |
183 | MiscState *s = opaque; | |
184 | ||
185 | qemu_put_be32s(f, &s->irq); | |
186 | qemu_put_8s(f, &s->config); | |
187 | qemu_put_8s(f, &s->aux1); | |
188 | qemu_put_8s(f, &s->aux2); | |
189 | qemu_put_8s(f, &s->diag); | |
190 | qemu_put_8s(f, &s->mctrl); | |
191 | } | |
192 | ||
193 | static int slavio_misc_load(QEMUFile *f, void *opaque, int version_id) | |
194 | { | |
195 | MiscState *s = opaque; | |
196 | ||
197 | if (version_id != 1) | |
198 | return -EINVAL; | |
199 | ||
200 | qemu_get_be32s(f, &s->irq); | |
201 | qemu_get_8s(f, &s->config); | |
202 | qemu_get_8s(f, &s->aux1); | |
203 | qemu_get_8s(f, &s->aux2); | |
204 | qemu_get_8s(f, &s->diag); | |
205 | qemu_get_8s(f, &s->mctrl); | |
206 | return 0; | |
207 | } | |
208 | ||
209 | void *slavio_misc_init(uint32_t base, int irq) | |
210 | { | |
211 | int slavio_misc_io_memory; | |
212 | MiscState *s; | |
213 | ||
214 | s = qemu_mallocz(sizeof(MiscState)); | |
215 | if (!s) | |
216 | return NULL; | |
217 | ||
218 | slavio_misc_io_memory = cpu_register_io_memory(0, slavio_misc_mem_read, slavio_misc_mem_write, s); | |
219 | // Slavio control | |
220 | cpu_register_physical_memory(base + 0x1800000, MISC_MAXADDR, slavio_misc_io_memory); | |
221 | // AUX 1 | |
222 | cpu_register_physical_memory(base + 0x1900000, MISC_MAXADDR, slavio_misc_io_memory); | |
223 | // AUX 2 | |
224 | cpu_register_physical_memory(base + 0x1910000, MISC_MAXADDR, slavio_misc_io_memory); | |
225 | // Diagnostics | |
226 | cpu_register_physical_memory(base + 0x1a00000, MISC_MAXADDR, slavio_misc_io_memory); | |
227 | // Modem control | |
228 | cpu_register_physical_memory(base + 0x1b00000, MISC_MAXADDR, slavio_misc_io_memory); | |
229 | // System control | |
230 | cpu_register_physical_memory(base + 0x1f00000, MISC_MAXADDR, slavio_misc_io_memory); | |
231 | // Power management | |
232 | cpu_register_physical_memory(base + 0xa000000, MISC_MAXADDR, slavio_misc_io_memory); | |
233 | ||
234 | s->irq = irq; | |
235 | ||
236 | register_savevm("slavio_misc", base, 1, slavio_misc_save, slavio_misc_load, s); | |
237 | qemu_register_reset(slavio_misc_reset, s); | |
238 | slavio_misc_reset(s); | |
239 | return s; | |
240 | } |