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, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 * Copyright IBM Corp. 2008
20 /* This file implements emulation of the 32-bit PCI controller found in some
21 * 4xx SoCs, such as the 440EP. */
25 typedef target_phys_addr_t pci_addr_t;
32 #define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
34 #define DPRINTF(fmt, args...)
49 #define PPC4xx_PCI_NR_PMMS 3
50 #define PPC4xx_PCI_NR_PTMS 2
52 struct PPC4xxPCIState {
53 struct PCIMasterMap pmm[PPC4xx_PCI_NR_PMMS];
54 struct PCITargetMap ptm[PPC4xx_PCI_NR_PTMS];
56 PCIHostState pci_state;
59 typedef struct PPC4xxPCIState PPC4xxPCIState;
61 #define PCIC0_CFGADDR 0x0
62 #define PCIC0_CFGDATA 0x4
64 /* PLB Memory Map (PMM) registers specify which PLB addresses are translated to
66 #define PCIL0_PMM0LA 0x0
67 #define PCIL0_PMM0MA 0x4
68 #define PCIL0_PMM0PCILA 0x8
69 #define PCIL0_PMM0PCIHA 0xc
70 #define PCIL0_PMM1LA 0x10
71 #define PCIL0_PMM1MA 0x14
72 #define PCIL0_PMM1PCILA 0x18
73 #define PCIL0_PMM1PCIHA 0x1c
74 #define PCIL0_PMM2LA 0x20
75 #define PCIL0_PMM2MA 0x24
76 #define PCIL0_PMM2PCILA 0x28
77 #define PCIL0_PMM2PCIHA 0x2c
79 /* PCI Target Map (PTM) registers specify which PCI addresses are translated to
81 #define PCIL0_PTM1MS 0x30
82 #define PCIL0_PTM1LA 0x34
83 #define PCIL0_PTM2MS 0x38
84 #define PCIL0_PTM2LA 0x3c
85 #define PCI_REG_SIZE 0x40
88 static uint32_t pci4xx_cfgaddr_readl(void *opaque, target_phys_addr_t addr)
90 PPC4xxPCIState *ppc4xx_pci = opaque;
92 return ppc4xx_pci->pci_state.config_reg;
95 static CPUReadMemoryFunc *pci4xx_cfgaddr_read[] = {
96 &pci4xx_cfgaddr_readl,
97 &pci4xx_cfgaddr_readl,
98 &pci4xx_cfgaddr_readl,
101 static void pci4xx_cfgaddr_writel(void *opaque, target_phys_addr_t addr,
104 PPC4xxPCIState *ppc4xx_pci = opaque;
106 #ifdef TARGET_WORDS_BIGENDIAN
107 value = bswap32(value);
110 ppc4xx_pci->pci_state.config_reg = value & ~0x3;
113 static CPUWriteMemoryFunc *pci4xx_cfgaddr_write[] = {
114 &pci4xx_cfgaddr_writel,
115 &pci4xx_cfgaddr_writel,
116 &pci4xx_cfgaddr_writel,
119 static CPUReadMemoryFunc *pci4xx_cfgdata_read[] = {
120 &pci_host_data_readb,
121 &pci_host_data_readw,
122 &pci_host_data_readl,
125 static CPUWriteMemoryFunc *pci4xx_cfgdata_write[] = {
126 &pci_host_data_writeb,
127 &pci_host_data_writew,
128 &pci_host_data_writel,
131 static void ppc4xx_pci_reg_write4(void *opaque, target_phys_addr_t offset,
134 struct PPC4xxPCIState *pci = opaque;
136 #ifdef TARGET_WORDS_BIGENDIAN
137 value = bswap32(value);
140 /* We ignore all target attempts at PCI configuration, effectively
141 * assuming a bidirectional 1:1 mapping of PLB and PCI space. */
145 pci->pmm[0].la = value;
148 pci->pmm[0].ma = value;
150 case PCIL0_PMM0PCIHA:
151 pci->pmm[0].pciha = value;
153 case PCIL0_PMM0PCILA:
154 pci->pmm[0].pcila = value;
158 pci->pmm[1].la = value;
161 pci->pmm[1].ma = value;
163 case PCIL0_PMM1PCIHA:
164 pci->pmm[1].pciha = value;
166 case PCIL0_PMM1PCILA:
167 pci->pmm[1].pcila = value;
171 pci->pmm[2].la = value;
174 pci->pmm[2].ma = value;
176 case PCIL0_PMM2PCIHA:
177 pci->pmm[2].pciha = value;
179 case PCIL0_PMM2PCILA:
180 pci->pmm[2].pcila = value;
184 pci->ptm[0].ms = value;
187 pci->ptm[0].la = value;
190 pci->ptm[1].ms = value;
193 pci->ptm[1].la = value;
197 printf("%s: unhandled PCI internal register 0x%lx\n", __func__,
198 (unsigned long)offset);
203 static uint32_t ppc4xx_pci_reg_read4(void *opaque, target_phys_addr_t offset)
205 struct PPC4xxPCIState *pci = opaque;
210 value = pci->pmm[0].la;
213 value = pci->pmm[0].ma;
215 case PCIL0_PMM0PCIHA:
216 value = pci->pmm[0].pciha;
218 case PCIL0_PMM0PCILA:
219 value = pci->pmm[0].pcila;
223 value = pci->pmm[1].la;
226 value = pci->pmm[1].ma;
228 case PCIL0_PMM1PCIHA:
229 value = pci->pmm[1].pciha;
231 case PCIL0_PMM1PCILA:
232 value = pci->pmm[1].pcila;
236 value = pci->pmm[2].la;
239 value = pci->pmm[2].ma;
241 case PCIL0_PMM2PCIHA:
242 value = pci->pmm[2].pciha;
244 case PCIL0_PMM2PCILA:
245 value = pci->pmm[2].pcila;
249 value = pci->ptm[0].ms;
252 value = pci->ptm[0].la;
255 value = pci->ptm[1].ms;
258 value = pci->ptm[1].la;
262 printf("%s: invalid PCI internal register 0x%lx\n", __func__,
263 (unsigned long)offset);
267 #ifdef TARGET_WORDS_BIGENDIAN
268 value = bswap32(value);
274 static CPUReadMemoryFunc *pci_reg_read[] = {
275 &ppc4xx_pci_reg_read4,
276 &ppc4xx_pci_reg_read4,
277 &ppc4xx_pci_reg_read4,
280 static CPUWriteMemoryFunc *pci_reg_write[] = {
281 &ppc4xx_pci_reg_write4,
282 &ppc4xx_pci_reg_write4,
283 &ppc4xx_pci_reg_write4,
286 static void ppc4xx_pci_reset(void *opaque)
288 struct PPC4xxPCIState *pci = opaque;
290 memset(pci->pmm, 0, sizeof(pci->pmm));
291 memset(pci->ptm, 0, sizeof(pci->ptm));
294 /* On Bamboo, all pins from each slot are tied to a single board IRQ. This
295 * may need further refactoring for other boards. */
296 static int ppc4xx_pci_map_irq(PCIDevice *pci_dev, int irq_num)
298 int slot = pci_dev->devfn >> 3;
300 DPRINTF("%s: devfn %x irq %d -> %d\n", __func__,
301 pci_dev->devfn, irq_num, slot);
306 static void ppc4xx_pci_set_irq(qemu_irq *pci_irqs, int irq_num, int level)
308 DPRINTF("%s: PCI irq %d\n", __func__, irq_num);
309 qemu_set_irq(pci_irqs[irq_num], level);
312 static void ppc4xx_pci_save(QEMUFile *f, void *opaque)
314 PPC4xxPCIState *controller = opaque;
317 pci_device_save(controller->pci_dev, f);
319 for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
320 qemu_put_be32s(f, &controller->pmm[i].la);
321 qemu_put_be32s(f, &controller->pmm[i].ma);
322 qemu_put_be32s(f, &controller->pmm[i].pcila);
323 qemu_put_be32s(f, &controller->pmm[i].pciha);
326 for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
327 qemu_put_be32s(f, &controller->ptm[i].ms);
328 qemu_put_be32s(f, &controller->ptm[i].la);
332 static int ppc4xx_pci_load(QEMUFile *f, void *opaque, int version_id)
334 PPC4xxPCIState *controller = opaque;
340 pci_device_load(controller->pci_dev, f);
342 for (i = 0; i < PPC4xx_PCI_NR_PMMS; i++) {
343 qemu_get_be32s(f, &controller->pmm[i].la);
344 qemu_get_be32s(f, &controller->pmm[i].ma);
345 qemu_get_be32s(f, &controller->pmm[i].pcila);
346 qemu_get_be32s(f, &controller->pmm[i].pciha);
349 for (i = 0; i < PPC4xx_PCI_NR_PTMS; i++) {
350 qemu_get_be32s(f, &controller->ptm[i].ms);
351 qemu_get_be32s(f, &controller->ptm[i].la);
357 /* XXX Interrupt acknowledge cycles not supported. */
358 PCIBus *ppc4xx_pci_init(CPUState *env, qemu_irq pci_irqs[4],
359 target_phys_addr_t config_space,
360 target_phys_addr_t int_ack,
361 target_phys_addr_t special_cycle,
362 target_phys_addr_t registers)
364 PPC4xxPCIState *controller;
366 static int ppc4xx_pci_id;
368 controller = qemu_mallocz(sizeof(PPC4xxPCIState));
372 controller->pci_state.bus = pci_register_bus(ppc4xx_pci_set_irq,
376 controller->pci_dev = pci_register_device(controller->pci_state.bus,
377 "host bridge", sizeof(PCIDevice),
379 controller->pci_dev->config[0x00] = 0x14; // vendor_id
380 controller->pci_dev->config[0x01] = 0x10;
381 controller->pci_dev->config[0x02] = 0x7f; // device_id
382 controller->pci_dev->config[0x03] = 0x02;
383 controller->pci_dev->config[0x0a] = 0x80; // class_sub = other bridge type
384 controller->pci_dev->config[0x0b] = 0x06; // class_base = PCI_bridge
387 index = cpu_register_io_memory(0, pci4xx_cfgaddr_read,
388 pci4xx_cfgaddr_write, controller);
391 cpu_register_physical_memory(config_space + PCIC0_CFGADDR, 4, index);
394 index = cpu_register_io_memory(0, pci4xx_cfgdata_read,
395 pci4xx_cfgdata_write,
396 &controller->pci_state);
399 cpu_register_physical_memory(config_space + PCIC0_CFGDATA, 4, index);
401 /* Internal registers */
402 index = cpu_register_io_memory(0, pci_reg_read, pci_reg_write, controller);
405 cpu_register_physical_memory(registers, PCI_REG_SIZE, index);
407 qemu_register_reset(ppc4xx_pci_reset, controller);
409 /* XXX load/save code not tested. */
410 register_savevm("ppc4xx_pci", ppc4xx_pci_id++, 1,
411 ppc4xx_pci_save, ppc4xx_pci_load, controller);
413 return controller->pci_state.bus;
416 printf("%s error\n", __func__);
417 qemu_free(controller);