2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, see <http://www.gnu.org/licenses/>.
14 * Copyright IBM Corp. 2008
16 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 /* This file implements emulation of the 32-bit PCI controller found in some
20 * 4xx SoCs, such as the 440EP. */
31 #define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
33 #define DPRINTF(fmt, ...)
48 #define PPC4xx_PCI_NR_PMMS 3
49 #define PPC4xx_PCI_NR_PTMS 2
51 struct PPC4xxPCIState {
52 struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
53 struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
55 PCIHostState pci_state;
58 typedef struct PPC4xxPCIState PPC4xxPCIState;
60 #define PCIC0_CFGADDR 0x0
61 #define PCIC0_CFGDATA 0x4
63 /* PLB Memory Map (PMM) registers specify which PLB addresses are translated to
65 #define PCIL0_PMM0LA 0x0
66 #define PCIL0_PMM0MA 0x4
67 #define PCIL0_PMM0PCILA 0x8
68 #define PCIL0_PMM0PCIHA 0xc
69 #define PCIL0_PMM1LA 0x10
70 #define PCIL0_PMM1MA 0x14
71 #define PCIL0_PMM1PCILA 0x18
72 #define PCIL0_PMM1PCIHA 0x1c
73 #define PCIL0_PMM2LA 0x20
74 #define PCIL0_PMM2MA 0x24
75 #define PCIL0_PMM2PCILA 0x28
76 #define PCIL0_PMM2PCIHA 0x2c
78 /* PCI Target Map (PTM) registers specify which PCI addresses are translated to
80 #define PCIL0_PTM1MS 0x30
81 #define PCIL0_PTM1LA 0x34
82 #define PCIL0_PTM2MS 0x38
83 #define PCIL0_PTM2LA 0x3c
84 #define PCI_REG_SIZE 0x40
87 static uint32_t pci4xx_cfgaddr_readl(void *opaque, target_phys_addr_t addr)
89 PPC4xxPCIState *ppc4xx_pci = opaque;
91 return ppc4xx_pci->pci_state.config_reg;
94 static CPUReadMemoryFunc * const pci4xx_cfgaddr_read[] = {
95 &pci4xx_cfgaddr_readl,
96 &pci4xx_cfgaddr_readl,
97 &pci4xx_cfgaddr_readl,
100 static void pci4xx_cfgaddr_writel(void *opaque, target_phys_addr_t addr,
103 PPC4xxPCIState *ppc4xx_pci = opaque;
105 #ifdef TARGET_WORDS_BIGENDIAN
106 value = bswap32(value);
109 ppc4xx_pci->pci_state.config_reg = value & ~0x3;
112 static CPUWriteMemoryFunc * const pci4xx_cfgaddr_write[] = {
113 &pci4xx_cfgaddr_writel,
114 &pci4xx_cfgaddr_writel,
115 &pci4xx_cfgaddr_writel,
118 static void ppc4xx_pci_reg_write4(void *opaque, target_phys_addr_t offset,
121 struct PPC4xxPCIState *pci = opaque;
123 #ifdef TARGET_WORDS_BIGENDIAN
124 value = bswap32(value);
127 /* We ignore all target attempts at PCI configuration, effectively
128 * assuming a bidirectional 1:1 mapping of PLB and PCI space. */
132 pci->pmm[0].la = value;
135 pci->pmm[0].ma = value;
137 case PCIL0_PMM0PCIHA:
138 pci->pmm[0].pciha = value;
140 case PCIL0_PMM0PCILA:
141 pci->pmm[0].pcila = value;
145 pci->pmm[1].la = value;
148 pci->pmm[1].ma = value;
150 case PCIL0_PMM1PCIHA:
151 pci->pmm[1].pciha = value;
153 case PCIL0_PMM1PCILA:
154 pci->pmm[1].pcila = value;
158 pci->pmm[2].la = value;
161 pci->pmm[2].ma = value;
163 case PCIL0_PMM2PCIHA:
164 pci->pmm[2].pciha = value;
166 case PCIL0_PMM2PCILA:
167 pci->pmm[2].pcila = value;
171 pci->ptm[0].ms = value;
174 pci->ptm[0].la = value;
177 pci->ptm[1].ms = value;
180 pci->ptm[1].la = value;
184 printf("%s: unhandled PCI internal register 0x%lx\n", __func__,
185 (unsigned long)offset);
190 static uint32_t ppc4xx_pci_reg_read4(void *opaque, target_phys_addr_t offset)
192 struct PPC4xxPCIState *pci = opaque;
197 value = pci->pmm[0].la;
200 value = pci->pmm[0].ma;
202 case PCIL0_PMM0PCIHA:
203 value = pci->pmm[0].pciha;
205 case PCIL0_PMM0PCILA:
206 value = pci->pmm[0].pcila;
210 value = pci->pmm[1].la;
213 value = pci->pmm[1].ma;
215 case PCIL0_PMM1PCIHA:
216 value = pci->pmm[1].pciha;
218 case PCIL0_PMM1PCILA:
219 value = pci->pmm[1].pcila;
223 value = pci->pmm[2].la;
226 value = pci->pmm[2].ma;
228 case PCIL0_PMM2PCIHA:
229 value = pci->pmm[2].pciha;
231 case PCIL0_PMM2PCILA:
232 value = pci->pmm[2].pcila;
236 value = pci->ptm[0].ms;
239 value = pci->ptm[0].la;
242 value = pci->ptm[1].ms;
245 value = pci->ptm[1].la;
249 printf("%s: invalid PCI internal register 0x%lx\n", __func__,
250 (unsigned long)offset);
254 #ifdef TARGET_WORDS_BIGENDIAN
255 value = bswap32(value);
261 static CPUReadMemoryFunc * const pci_reg_read[] = {
262 &ppc4xx_pci_reg_read4,
263 &ppc4xx_pci_reg_read4,
264 &ppc4xx_pci_reg_read4,
267 static CPUWriteMemoryFunc * const pci_reg_write[] = {
268 &ppc4xx_pci_reg_write4,
269 &ppc4xx_pci_reg_write4,
270 &ppc4xx_pci_reg_write4,
273 static void ppc4xx_pci_reset(void *opaque)
275 struct PPC4xxPCIState *pci = opaque;
277 memset(pci->pmm, 0, sizeof(pci->pmm));
278 memset(pci->ptm, 0, sizeof(pci->ptm));
281 /* On Bamboo, all pins from each slot are tied to a single board IRQ. This
282 * may need further refactoring for other boards. */
283 static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
285 int slot = pci_dev->devfn >> 3;
287 DPRINTF("%s: devfn %x irq %d -> %d\n", __func__,
288 pci_dev->devfn, irq_num, slot);
293 static void ppc4xx_pci_set_irq(void *opaque, int irq_num, int level)
295 qemu_irq *pci_irqs = opaque;
297 DPRINTF("%s: PCI irq %d\n", __func__, irq_num);
298 qemu_set_irq(pci_irqs[irq_num], level);
301 static void ppc4xx_pci_save(QEMUFile *f, void *opaque)
303 PPC4xxPCIState *controller = opaque;
306 pci_device_save(controller->pci_dev, f);
308 for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
309 qemu_put_be32s(f, &controller->pmm[i].la);
310 qemu_put_be32s(f, &controller->pmm[i].ma);
311 qemu_put_be32s(f, &controller->pmm[i].pcila);
312 qemu_put_be32s(f, &controller->pmm[i].pciha);
315 for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
316 qemu_put_be32s(f, &controller->ptm[i].ms);
317 qemu_put_be32s(f, &controller->ptm[i].la);
321 static int ppc4xx_pci_load(QEMUFile *f, void *opaque, int version_id)
323 PPC4xxPCIState *controller = opaque;
329 pci_device_load(controller->pci_dev, f);
331 for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
332 qemu_get_be32s(f, &controller->pmm[i].la);
333 qemu_get_be32s(f, &controller->pmm[i].ma);
334 qemu_get_be32s(f, &controller->pmm[i].pcila);
335 qemu_get_be32s(f, &controller->pmm[i].pciha);
338 for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
339 qemu_get_be32s(f, &controller->ptm[i].ms);
340 qemu_get_be32s(f, &controller->ptm[i].la);
346 /* XXX Interrupt acknowledge cycles not supported. */
347 PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4],
348 target_phys_addr_t config_space,
349 target_phys_addr_t int_ack,
350 target_phys_addr_t special_cycle,
351 target_phys_addr_t registers)
353 PPC4xxPCIState *controller;
355 static int ppc4xx_pci_id;
358 controller = qemu_mallocz(sizeof(PPC4xxPCIState));
360 controller->pci_state.bus = pci_register_bus(NULL, "pci",
365 controller->pci_dev = pci_register_device(controller->pci_state.bus,
366 "host bridge", sizeof(PCIDevice),
368 pci_conf = controller->pci_dev->config;
369 pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_IBM);
370 pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_IBM_440GX);
371 pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_OTHER);
374 index = cpu_register_io_memory(pci4xx_cfgaddr_read,
375 pci4xx_cfgaddr_write, controller);
378 cpu_register_physical_memory(config_space + PCIC0_CFGADDR, 4, index);
381 index = pci_host_data_register_mmio(&controller->pci_state, 1);
384 cpu_register_physical_memory(config_space + PCIC0_CFGDATA, 4, index);
386 /* Internal registers */
387 index = cpu_register_io_memory(pci_reg_read, pci_reg_write, controller);
390 cpu_register_physical_memory(registers, PCI_REG_SIZE, index);
392 qemu_register_reset(ppc4xx_pci_reset, controller);
394 /* XXX load/save code not tested. */
395 register_savevm(&controller->pci_dev->qdev, "ppc4xx_pci", ppc4xx_pci_id++,
396 1, ppc4xx_pci_save, ppc4xx_pci_load, controller);
398 return controller->pci_state.bus;
401 printf("%s error\n", __func__);
402 qemu_free(controller);