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1/*
2 * QEMU PowerPC E500 embedded processors pci controller emulation
3 *
4 * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved.
5 *
6 * Author: Yu Liu, <yu.liu@freescale.com>
7 *
8 * This file is derived from hw/ppc4xx_pci.c,
9 * the copyright for that material belongs to the original owners.
10 *
11 * This is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17#include "hw.h"
74c62ba8 18#include "ppce500.h"
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19#include "pci.h"
20#include "pci_host.h"
21#include "bswap.h"
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22
23#ifdef DEBUG_PCI
001faf32 24#define pci_debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
74c62ba8 25#else
001faf32 26#define pci_debug(fmt, ...)
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27#endif
28
29#define PCIE500_CFGADDR 0x0
30#define PCIE500_CFGDATA 0x4
31#define PCIE500_REG_BASE 0xC00
32#define PCIE500_REG_SIZE (0x1000 - PCIE500_REG_BASE)
33
34#define PPCE500_PCI_CONFIG_ADDR 0x0
35#define PPCE500_PCI_CONFIG_DATA 0x4
36#define PPCE500_PCI_INTACK 0x8
37
38#define PPCE500_PCI_OW1 (0xC20 - PCIE500_REG_BASE)
39#define PPCE500_PCI_OW2 (0xC40 - PCIE500_REG_BASE)
40#define PPCE500_PCI_OW3 (0xC60 - PCIE500_REG_BASE)
41#define PPCE500_PCI_OW4 (0xC80 - PCIE500_REG_BASE)
42#define PPCE500_PCI_IW3 (0xDA0 - PCIE500_REG_BASE)
43#define PPCE500_PCI_IW2 (0xDC0 - PCIE500_REG_BASE)
44#define PPCE500_PCI_IW1 (0xDE0 - PCIE500_REG_BASE)
45
46#define PPCE500_PCI_GASKET_TIMR (0xE20 - PCIE500_REG_BASE)
47
48#define PCI_POTAR 0x0
49#define PCI_POTEAR 0x4
50#define PCI_POWBAR 0x8
51#define PCI_POWAR 0x10
52
53#define PCI_PITAR 0x0
54#define PCI_PIWBAR 0x8
55#define PCI_PIWBEAR 0xC
56#define PCI_PIWAR 0x10
57
58#define PPCE500_PCI_NR_POBS 5
59#define PPCE500_PCI_NR_PIBS 3
60
61struct pci_outbound {
62 uint32_t potar;
63 uint32_t potear;
64 uint32_t powbar;
65 uint32_t powar;
66};
67
68struct pci_inbound {
69 uint32_t pitar;
70 uint32_t piwbar;
71 uint32_t piwbear;
72 uint32_t piwar;
73};
74
75struct PPCE500PCIState {
76 struct pci_outbound pob[PPCE500_PCI_NR_POBS];
77 struct pci_inbound pib[PPCE500_PCI_NR_PIBS];
78 uint32_t gasket_time;
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79 PCIHostState pci_state;
80 PCIDevice *pci_dev;
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81};
82
83typedef struct PPCE500PCIState PPCE500PCIState;
84
c227f099 85static uint32_t pci_reg_read4(void *opaque, target_phys_addr_t addr)
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86{
87 PPCE500PCIState *pci = opaque;
88 unsigned long win;
89 uint32_t value = 0;
90
91 win = addr & 0xfe0;
92
93 switch (win) {
94 case PPCE500_PCI_OW1:
95 case PPCE500_PCI_OW2:
96 case PPCE500_PCI_OW3:
97 case PPCE500_PCI_OW4:
98 switch (addr & 0xC) {
99 case PCI_POTAR: value = pci->pob[(addr >> 5) & 0x7].potar; break;
100 case PCI_POTEAR: value = pci->pob[(addr >> 5) & 0x7].potear; break;
101 case PCI_POWBAR: value = pci->pob[(addr >> 5) & 0x7].powbar; break;
102 case PCI_POWAR: value = pci->pob[(addr >> 5) & 0x7].powar; break;
103 default: break;
104 }
105 break;
106
107 case PPCE500_PCI_IW3:
108 case PPCE500_PCI_IW2:
109 case PPCE500_PCI_IW1:
110 switch (addr & 0xC) {
111 case PCI_PITAR: value = pci->pib[(addr >> 5) & 0x3].pitar; break;
112 case PCI_PIWBAR: value = pci->pib[(addr >> 5) & 0x3].piwbar; break;
113 case PCI_PIWBEAR: value = pci->pib[(addr >> 5) & 0x3].piwbear; break;
114 case PCI_PIWAR: value = pci->pib[(addr >> 5) & 0x3].piwar; break;
115 default: break;
116 };
117 break;
118
119 case PPCE500_PCI_GASKET_TIMR:
120 value = pci->gasket_time;
121 break;
122
123 default:
124 break;
125 }
126
c0a2a096
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127 pci_debug("%s: win:%lx(addr:" TARGET_FMT_plx ") -> value:%x\n", __func__,
128 win, addr, value);
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129 return value;
130}
131
d60efc6b 132static CPUReadMemoryFunc * const e500_pci_reg_read[] = {
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133 &pci_reg_read4,
134 &pci_reg_read4,
135 &pci_reg_read4,
136};
137
c227f099 138static void pci_reg_write4(void *opaque, target_phys_addr_t addr,
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139 uint32_t value)
140{
141 PPCE500PCIState *pci = opaque;
142 unsigned long win;
143
144 win = addr & 0xfe0;
145
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BS
146 pci_debug("%s: value:%x -> win:%lx(addr:" TARGET_FMT_plx ")\n",
147 __func__, value, win, addr);
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148
149 switch (win) {
150 case PPCE500_PCI_OW1:
151 case PPCE500_PCI_OW2:
152 case PPCE500_PCI_OW3:
153 case PPCE500_PCI_OW4:
154 switch (addr & 0xC) {
155 case PCI_POTAR: pci->pob[(addr >> 5) & 0x7].potar = value; break;
156 case PCI_POTEAR: pci->pob[(addr >> 5) & 0x7].potear = value; break;
157 case PCI_POWBAR: pci->pob[(addr >> 5) & 0x7].powbar = value; break;
158 case PCI_POWAR: pci->pob[(addr >> 5) & 0x7].powar = value; break;
159 default: break;
160 };
161 break;
162
163 case PPCE500_PCI_IW3:
164 case PPCE500_PCI_IW2:
165 case PPCE500_PCI_IW1:
166 switch (addr & 0xC) {
167 case PCI_PITAR: pci->pib[(addr >> 5) & 0x3].pitar = value; break;
168 case PCI_PIWBAR: pci->pib[(addr >> 5) & 0x3].piwbar = value; break;
169 case PCI_PIWBEAR: pci->pib[(addr >> 5) & 0x3].piwbear = value; break;
170 case PCI_PIWAR: pci->pib[(addr >> 5) & 0x3].piwar = value; break;
171 default: break;
172 };
173 break;
174
175 case PPCE500_PCI_GASKET_TIMR:
176 pci->gasket_time = value;
177 break;
178
179 default:
180 break;
181 };
182}
183
d60efc6b 184static CPUWriteMemoryFunc * const e500_pci_reg_write[] = {
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185 &pci_reg_write4,
186 &pci_reg_write4,
187 &pci_reg_write4,
188};
189
190static int mpc85xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
191{
192 int devno = pci_dev->devfn >> 3, ret = 0;
193
194 switch (devno) {
195 /* Two PCI slot */
196 case 0x11:
197 case 0x12:
198 ret = (irq_num + devno - 0x10) % 4;
199 break;
200 default:
72b310e9 201 printf("Error:%s:unknown dev number\n", __func__);
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202 }
203
204 pci_debug("%s: devfn %x irq %d -> %d devno:%x\n", __func__,
205 pci_dev->devfn, irq_num, ret, devno);
206
207 return ret;
208}
209
5d4e84c8 210static void mpc85xx_pci_set_irq(void *opaque, int irq_num, int level)
74c62ba8 211{
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212 qemu_irq *pic = opaque;
213
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214 pci_debug("%s: PCI irq %d, level:%d\n", __func__, irq_num, level);
215
216 qemu_set_irq(pic[irq_num], level);
217}
218
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219static const VMStateDescription vmstate_pci_outbound = {
220 .name = "pci_outbound",
221 .version_id = 0,
222 .minimum_version_id = 0,
223 .minimum_version_id_old = 0,
224 .fields = (VMStateField[]) {
225 VMSTATE_UINT32(potar, struct pci_outbound),
226 VMSTATE_UINT32(potear, struct pci_outbound),
227 VMSTATE_UINT32(powbar, struct pci_outbound),
228 VMSTATE_UINT32(powar, struct pci_outbound),
229 VMSTATE_END_OF_LIST()
74c62ba8 230 }
e0433ecc 231};
74c62ba8 232
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233static const VMStateDescription vmstate_pci_inbound = {
234 .name = "pci_inbound",
235 .version_id = 0,
236 .minimum_version_id = 0,
237 .minimum_version_id_old = 0,
238 .fields = (VMStateField[]) {
239 VMSTATE_UINT32(pitar, struct pci_inbound),
240 VMSTATE_UINT32(piwbar, struct pci_inbound),
241 VMSTATE_UINT32(piwbear, struct pci_inbound),
242 VMSTATE_UINT32(piwar, struct pci_inbound),
243 VMSTATE_END_OF_LIST()
74c62ba8 244 }
e0433ecc 245};
74c62ba8 246
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247static const VMStateDescription vmstate_ppce500_pci = {
248 .name = "ppce500_pci",
249 .version_id = 1,
250 .minimum_version_id = 1,
251 .minimum_version_id_old = 1,
252 .fields = (VMStateField[]) {
253 VMSTATE_PCI_DEVICE_POINTER(pci_dev, PPCE500PCIState),
254 VMSTATE_STRUCT_ARRAY(pob, PPCE500PCIState, PPCE500_PCI_NR_POBS, 1,
255 vmstate_pci_outbound, struct pci_outbound),
256 VMSTATE_STRUCT_ARRAY(pib, PPCE500PCIState, PPCE500_PCI_NR_PIBS, 1,
257 vmstate_pci_outbound, struct pci_inbound),
258 VMSTATE_UINT32(gasket_time, PPCE500PCIState),
259 VMSTATE_END_OF_LIST()
74c62ba8 260 }
e0433ecc 261};
74c62ba8 262
c227f099 263PCIBus *ppce500_pci_init(qemu_irq pci_irqs[4], target_phys_addr_t registers)
74c62ba8 264{
b19159e8 265 PPCE500PCIState *controller;
74c62ba8 266 PCIDevice *d;
b19159e8 267 int index;
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268 static int ppce500_pci_id;
269
b19159e8 270 controller = qemu_mallocz(sizeof(PPCE500PCIState));
74c62ba8 271
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272 controller->pci_state.bus = pci_register_bus(NULL, "pci",
273 mpc85xx_pci_set_irq,
274 mpc85xx_pci_map_irq,
275 pci_irqs, PCI_DEVFN(0x11, 0),
276 4);
277 d = pci_register_device(controller->pci_state.bus,
278 "host bridge", sizeof(PCIDevice),
279 0, NULL, NULL);
74c62ba8 280
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281 pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_FREESCALE);
282 pci_config_set_device_id(d->config, PCI_DEVICE_ID_MPC8533E);
283 pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_POWERPC);
74c62ba8 284
b19159e8 285 controller->pci_dev = d;
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286
287 /* CFGADDR */
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288 index = pci_host_conf_register_mmio(&controller->pci_state,
289 DEVICE_BIG_ENDIAN);
74c62ba8 290 if (index < 0)
b19159e8 291 goto free;
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292 cpu_register_physical_memory(registers + PCIE500_CFGADDR, 4, index);
293
294 /* CFGDATA */
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295 index = pci_host_data_register_mmio(&controller->pci_state,
296 DEVICE_BIG_ENDIAN);
74c62ba8 297 if (index < 0)
b19159e8 298 goto free;
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299 cpu_register_physical_memory(registers + PCIE500_CFGDATA, 4, index);
300
1eed09cb 301 index = cpu_register_io_memory(e500_pci_reg_read,
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302 e500_pci_reg_write, controller,
303 DEVICE_NATIVE_ENDIAN);
74c62ba8 304 if (index < 0)
b19159e8 305 goto free;
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306 cpu_register_physical_memory(registers + PCIE500_REG_BASE,
307 PCIE500_REG_SIZE, index);
13b7fdef 308
b19159e8 309 /* XXX load/save code not tested. */
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310 vmstate_register(&d->qdev, ppce500_pci_id++, &vmstate_ppce500_pci,
311 controller);
74c62ba8 312
b19159e8 313 return controller->pci_state.bus;
74c62ba8 314
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AL
315free:
316 printf("%s error\n", __func__);
317 qemu_free(controller);
318 return NULL;
74c62ba8 319}