2 * HP-PARISC Dino PCI chipset emulation, as in B160L and similiar machines
4 * (C) 2017-2019 by Helge Deller <deller@gmx.de>
6 * This work is licensed under the GNU GPL license version 2 or later.
8 * Documentation available at:
9 * https://parisc.wiki.kernel.org/images-parisc/9/91/Dino_ers.pdf
10 * https://parisc.wiki.kernel.org/images-parisc/7/70/Dino_3_1_Errata.pdf
13 #include "qemu/osdep.h"
14 #include "qemu/module.h"
15 #include "qemu/units.h"
16 #include "qapi/error.h"
18 #include "hw/pci/pci.h"
19 #include "hw/pci/pci_bus.h"
20 #include "migration/vmstate.h"
23 #include "qom/object.h"
26 #define TYPE_DINO_PCI_HOST_BRIDGE "dino-pcihost"
28 #define DINO_IAR0 0x004
29 #define DINO_IODC 0x008
30 #define DINO_IRR0 0x00C /* RO */
31 #define DINO_IAR1 0x010
32 #define DINO_IRR1 0x014 /* RO */
33 #define DINO_IMR 0x018
34 #define DINO_IPR 0x01C
35 #define DINO_TOC_ADDR 0x020
36 #define DINO_ICR 0x024
37 #define DINO_ILR 0x028 /* RO */
38 #define DINO_IO_COMMAND 0x030 /* WO */
39 #define DINO_IO_STATUS 0x034 /* RO */
40 #define DINO_IO_CONTROL 0x038
41 #define DINO_IO_GSC_ERR_RESP 0x040 /* RO */
42 #define DINO_IO_ERR_INFO 0x044 /* RO */
43 #define DINO_IO_PCI_ERR_RESP 0x048 /* RO */
44 #define DINO_IO_FBB_EN 0x05c
45 #define DINO_IO_ADDR_EN 0x060
46 #define DINO_PCI_CONFIG_ADDR 0x064
47 #define DINO_PCI_CONFIG_DATA 0x068
48 #define DINO_PCI_IO_DATA 0x06c
49 #define DINO_PCI_MEM_DATA 0x070 /* Dino 3.x only */
50 #define DINO_GSC2X_CONFIG 0x7b4 /* RO */
51 #define DINO_GMASK 0x800
52 #define DINO_PAMR 0x804
53 #define DINO_PAPR 0x808
54 #define DINO_DAMODE 0x80c
55 #define DINO_PCICMD 0x810
56 #define DINO_PCISTS 0x814 /* R/WC */
57 #define DINO_MLTIM 0x81c
58 #define DINO_BRDG_FEAT 0x820
59 #define DINO_PCIROR 0x824
60 #define DINO_PCIWOR 0x828
61 #define DINO_TLTIM 0x830
63 #define DINO_IRQS 11 /* bits 0-10 are architected */
64 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
65 #define DINO_LOCAL_IRQS (DINO_IRQS + 1)
66 #define DINO_MASK_IRQ(x) (1 << (x))
74 #define GSCEXTINT 0x040
75 /* #define xxx 0x080 - bit 7 is "default" */
76 /* #define xxx 0x100 - bit 8 not used */
77 /* #define xxx 0x200 - bit 9 not used */
78 #define RS232INT 0x400
80 #define DINO_MEM_CHUNK_SIZE (8 * MiB)
82 OBJECT_DECLARE_SIMPLE_TYPE(DinoState
, DINO_PCI_HOST_BRIDGE
)
84 #define DINO800_REGS (1 + (DINO_TLTIM - DINO_GMASK) / 4)
85 static const uint32_t reg800_keep_bits
[DINO800_REGS
] = {
86 MAKE_64BIT_MASK(0, 1), /* GMASK */
87 MAKE_64BIT_MASK(0, 7), /* PAMR */
88 MAKE_64BIT_MASK(0, 7), /* PAPR */
89 MAKE_64BIT_MASK(0, 8), /* DAMODE */
90 MAKE_64BIT_MASK(0, 7), /* PCICMD */
91 MAKE_64BIT_MASK(0, 9), /* PCISTS */
92 MAKE_64BIT_MASK(0, 32), /* Undefined */
93 MAKE_64BIT_MASK(0, 8), /* MLTIM */
94 MAKE_64BIT_MASK(0, 30), /* BRDG_FEAT */
95 MAKE_64BIT_MASK(0, 24), /* PCIROR */
96 MAKE_64BIT_MASK(0, 22), /* PCIWOR */
97 MAKE_64BIT_MASK(0, 32), /* Undocumented */
98 MAKE_64BIT_MASK(0, 9), /* TLTIM */
102 PCIHostState parent_obj
;
104 /* PCI_CONFIG_ADDR is parent_obj.config_reg, via pci_host_conf_be_ops,
105 so that we can map PCI_CONFIG_DATA to pci_host_data_be_ops. */
106 uint32_t config_reg_dino
; /* keep original copy, including 2 lowest bits */
119 uint32_t reg800
[DINO800_REGS
];
121 MemoryRegion this_mem
;
122 MemoryRegion pci_mem
;
123 MemoryRegion pci_mem_alias
[32];
127 MemoryRegion bm_ram_alias
;
128 MemoryRegion bm_pci_alias
;
129 MemoryRegion bm_cpu_alias
;
133 * Dino can forward memory accesses from the CPU in the range between
134 * 0xf0800000 and 0xff000000 to the PCI bus.
136 static void gsc_to_pci_forwarding(DinoState
*s
)
138 uint32_t io_addr_en
, tmp
;
141 tmp
= extract32(s
->io_control
, 7, 2);
142 enabled
= (tmp
== 0x01);
143 io_addr_en
= s
->io_addr_en
;
144 /* Mask out first (=firmware) and last (=Dino) areas. */
145 io_addr_en
&= ~(BIT(31) | BIT(0));
147 memory_region_transaction_begin();
148 for (i
= 1; i
< 31; i
++) {
149 MemoryRegion
*mem
= &s
->pci_mem_alias
[i
];
150 if (enabled
&& (io_addr_en
& (1U << i
))) {
151 if (!memory_region_is_mapped(mem
)) {
152 uint32_t addr
= 0xf0000000 + i
* DINO_MEM_CHUNK_SIZE
;
153 memory_region_add_subregion(get_system_memory(), addr
, mem
);
155 } else if (memory_region_is_mapped(mem
)) {
156 memory_region_del_subregion(get_system_memory(), mem
);
159 memory_region_transaction_commit();
162 static bool dino_chip_mem_valid(void *opaque
, hwaddr addr
,
163 unsigned size
, bool is_write
,
177 case DINO_IO_CONTROL
:
179 case DINO_IO_ADDR_EN
:
180 case DINO_PCI_IO_DATA
:
182 case DINO_GMASK
... DINO_PCISTS
:
183 case DINO_MLTIM
... DINO_PCIWOR
:
187 case DINO_PCI_IO_DATA
+ 2:
190 case DINO_PCI_IO_DATA
+ 1:
191 case DINO_PCI_IO_DATA
+ 3:
194 trace_dino_chip_mem_valid(addr
, ret
);
198 static MemTxResult
dino_chip_read_with_attrs(void *opaque
, hwaddr addr
,
199 uint64_t *data
, unsigned size
,
202 DinoState
*s
= opaque
;
203 MemTxResult ret
= MEMTX_OK
;
209 case DINO_PCI_IO_DATA
... DINO_PCI_IO_DATA
+ 3:
210 /* Read from PCI IO space. */
211 io
= &address_space_io
;
212 ioaddr
= s
->parent_obj
.config_reg
+ (addr
& 3);
215 val
= address_space_ldub(io
, ioaddr
, attrs
, &ret
);
218 val
= address_space_lduw_be(io
, ioaddr
, attrs
, &ret
);
221 val
= address_space_ldl_be(io
, ioaddr
, attrs
, &ret
);
224 g_assert_not_reached();
231 case DINO_IO_ADDR_EN
:
234 case DINO_IO_CONTROL
:
252 /* Any read to IPR clears the register. */
259 val
= s
->ilr
& s
->imr
& ~s
->icr
;
262 val
= s
->ilr
& s
->imr
& s
->icr
;
267 case DINO_GMASK
... DINO_TLTIM
:
268 val
= s
->reg800
[(addr
- DINO_GMASK
) / 4];
269 if (addr
== DINO_PAMR
) {
270 val
&= ~0x01; /* LSB is hardwired to 0 */
272 if (addr
== DINO_MLTIM
) {
273 val
&= ~0x07; /* 3 LSB are hardwired to 0 */
275 if (addr
== DINO_BRDG_FEAT
) {
276 val
&= ~(0x10710E0ul
| 8); /* bits 5-7, 24 & 15 reserved */
281 /* Controlled by dino_chip_mem_valid above. */
282 g_assert_not_reached();
285 trace_dino_chip_read(addr
, val
);
290 static MemTxResult
dino_chip_write_with_attrs(void *opaque
, hwaddr addr
,
291 uint64_t val
, unsigned size
,
294 DinoState
*s
= opaque
;
300 trace_dino_chip_write(addr
, val
);
303 case DINO_IO_DATA
... DINO_PCI_IO_DATA
+ 3:
304 /* Write into PCI IO space. */
305 io
= &address_space_io
;
306 ioaddr
= s
->parent_obj
.config_reg
+ (addr
& 3);
309 address_space_stb(io
, ioaddr
, val
, attrs
, &ret
);
312 address_space_stw_be(io
, ioaddr
, val
, attrs
, &ret
);
315 address_space_stl_be(io
, ioaddr
, val
, attrs
, &ret
);
318 g_assert_not_reached();
323 s
->io_fbb_en
= val
& 0x03;
325 case DINO_IO_ADDR_EN
:
327 gsc_to_pci_forwarding(s
);
329 case DINO_IO_CONTROL
:
331 gsc_to_pci_forwarding(s
);
347 /* Any write to IPR clears the register. */
351 /* IO_COMMAND of CPU with client_id bits */
352 s
->toc_addr
= 0xFFFA0030 | (val
& 0x1e000);
358 /* These registers are read-only. */
361 case DINO_GMASK
... DINO_TLTIM
:
362 i
= (addr
- DINO_GMASK
) / 4;
363 val
&= reg800_keep_bits
[i
];
368 /* Controlled by dino_chip_mem_valid above. */
369 g_assert_not_reached();
374 static const MemoryRegionOps dino_chip_ops
= {
375 .read_with_attrs
= dino_chip_read_with_attrs
,
376 .write_with_attrs
= dino_chip_write_with_attrs
,
377 .endianness
= DEVICE_BIG_ENDIAN
,
379 .min_access_size
= 1,
380 .max_access_size
= 4,
381 .accepts
= dino_chip_mem_valid
,
384 .min_access_size
= 1,
385 .max_access_size
= 4,
389 static const VMStateDescription vmstate_dino
= {
392 .minimum_version_id
= 1,
393 .fields
= (VMStateField
[]) {
394 VMSTATE_UINT32(iar0
, DinoState
),
395 VMSTATE_UINT32(iar1
, DinoState
),
396 VMSTATE_UINT32(imr
, DinoState
),
397 VMSTATE_UINT32(ipr
, DinoState
),
398 VMSTATE_UINT32(icr
, DinoState
),
399 VMSTATE_UINT32(ilr
, DinoState
),
400 VMSTATE_UINT32(io_fbb_en
, DinoState
),
401 VMSTATE_UINT32(io_addr_en
, DinoState
),
402 VMSTATE_UINT32(io_control
, DinoState
),
403 VMSTATE_UINT32(toc_addr
, DinoState
),
404 VMSTATE_END_OF_LIST()
408 /* Unlike pci_config_data_le_ops, no check of high bit set in config_reg. */
410 static uint64_t dino_config_data_read(void *opaque
, hwaddr addr
, unsigned len
)
412 PCIHostState
*s
= opaque
;
413 return pci_data_read(s
->bus
, s
->config_reg
| (addr
& 3), len
);
416 static void dino_config_data_write(void *opaque
, hwaddr addr
,
417 uint64_t val
, unsigned len
)
419 PCIHostState
*s
= opaque
;
420 pci_data_write(s
->bus
, s
->config_reg
| (addr
& 3), val
, len
);
423 static const MemoryRegionOps dino_config_data_ops
= {
424 .read
= dino_config_data_read
,
425 .write
= dino_config_data_write
,
426 .endianness
= DEVICE_LITTLE_ENDIAN
,
429 static uint64_t dino_config_addr_read(void *opaque
, hwaddr addr
, unsigned len
)
431 DinoState
*s
= opaque
;
432 return s
->config_reg_dino
;
435 static void dino_config_addr_write(void *opaque
, hwaddr addr
,
436 uint64_t val
, unsigned len
)
438 PCIHostState
*s
= opaque
;
439 DinoState
*ds
= opaque
;
440 ds
->config_reg_dino
= val
; /* keep a copy of original value */
441 s
->config_reg
= val
& ~3U;
444 static const MemoryRegionOps dino_config_addr_ops
= {
445 .read
= dino_config_addr_read
,
446 .write
= dino_config_addr_write
,
447 .valid
.min_access_size
= 4,
448 .valid
.max_access_size
= 4,
449 .endianness
= DEVICE_BIG_ENDIAN
,
452 static AddressSpace
*dino_pcihost_set_iommu(PCIBus
*bus
, void *opaque
,
455 DinoState
*s
= opaque
;
461 * Dino interrupts are connected as shown on Page 78, Table 23
462 * (Little-endian bit numbers)
469 * 6 GSC External Interrupt
470 * 7 Bus Error for "less than fatal" mode
476 static void dino_set_irq(void *opaque
, int irq
, int level
)
478 DinoState
*s
= opaque
;
479 uint32_t bit
= 1u << irq
;
480 uint32_t old_ilr
= s
->ilr
;
483 uint32_t ena
= bit
& ~old_ilr
;
485 s
->ilr
= old_ilr
| bit
;
487 uint32_t iar
= (ena
& s
->icr
? s
->iar1
: s
->iar0
);
488 stl_be_phys(&address_space_memory
, iar
& -32, iar
& 31);
491 s
->ilr
= old_ilr
& ~bit
;
495 static int dino_pci_map_irq(PCIDevice
*d
, int irq_num
)
497 int slot
= PCI_SLOT(d
->devfn
);
499 assert(irq_num
>= 0 && irq_num
<= 3);
504 static void dino_set_timer_irq(void *opaque
, int irq
, int level
)
506 /* ??? Not connected. */
509 static void dino_set_serial_irq(void *opaque
, int irq
, int level
)
511 dino_set_irq(opaque
, 10, level
);
514 PCIBus
*dino_init(MemoryRegion
*addr_space
,
515 qemu_irq
*p_rtc_irq
, qemu_irq
*p_ser_irq
)
522 dev
= qdev_new(TYPE_DINO_PCI_HOST_BRIDGE
);
523 s
= DINO_PCI_HOST_BRIDGE(dev
);
524 s
->iar0
= s
->iar1
= CPU_HPA
+ 3;
525 s
->toc_addr
= 0xFFFA0030; /* IO_COMMAND of CPU */
527 /* Dino PCI access from main memory. */
528 memory_region_init_io(&s
->this_mem
, OBJECT(s
), &dino_chip_ops
,
530 memory_region_add_subregion(addr_space
, DINO_HPA
, &s
->this_mem
);
532 /* Dino PCI config. */
533 memory_region_init_io(&s
->parent_obj
.conf_mem
, OBJECT(&s
->parent_obj
),
534 &dino_config_addr_ops
, dev
, "pci-conf-idx", 4);
535 memory_region_init_io(&s
->parent_obj
.data_mem
, OBJECT(&s
->parent_obj
),
536 &dino_config_data_ops
, dev
, "pci-conf-data", 4);
537 memory_region_add_subregion(&s
->this_mem
, DINO_PCI_CONFIG_ADDR
,
538 &s
->parent_obj
.conf_mem
);
539 memory_region_add_subregion(&s
->this_mem
, DINO_CONFIG_DATA
,
540 &s
->parent_obj
.data_mem
);
542 /* Dino PCI bus memory. */
543 memory_region_init(&s
->pci_mem
, OBJECT(s
), "pci-memory", 4 * GiB
);
545 b
= pci_register_root_bus(dev
, "pci", dino_set_irq
, dino_pci_map_irq
, s
,
546 &s
->pci_mem
, get_system_io(),
547 PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS
);
548 s
->parent_obj
.bus
= b
;
549 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev
), &error_fatal
);
551 /* Set up windows into PCI bus memory. */
552 for (i
= 1; i
< 31; i
++) {
553 uint32_t addr
= 0xf0000000 + i
* DINO_MEM_CHUNK_SIZE
;
554 char *name
= g_strdup_printf("PCI Outbound Window %d", i
);
555 memory_region_init_alias(&s
->pci_mem_alias
[i
], OBJECT(s
),
556 name
, &s
->pci_mem
, addr
,
557 DINO_MEM_CHUNK_SIZE
);
561 /* Set up PCI view of memory: Bus master address space. */
562 memory_region_init(&s
->bm
, OBJECT(s
), "bm-dino", 4 * GiB
);
563 memory_region_init_alias(&s
->bm_ram_alias
, OBJECT(s
),
564 "bm-system", addr_space
, 0,
565 0xf0000000 + DINO_MEM_CHUNK_SIZE
);
566 memory_region_init_alias(&s
->bm_pci_alias
, OBJECT(s
),
567 "bm-pci", &s
->pci_mem
,
568 0xf0000000 + DINO_MEM_CHUNK_SIZE
,
569 30 * DINO_MEM_CHUNK_SIZE
);
570 memory_region_init_alias(&s
->bm_cpu_alias
, OBJECT(s
),
571 "bm-cpu", addr_space
, 0xfff00000,
573 memory_region_add_subregion(&s
->bm
, 0,
575 memory_region_add_subregion(&s
->bm
,
576 0xf0000000 + DINO_MEM_CHUNK_SIZE
,
578 memory_region_add_subregion(&s
->bm
, 0xfff00000,
580 address_space_init(&s
->bm_as
, &s
->bm
, "pci-bm");
581 pci_setup_iommu(b
, dino_pcihost_set_iommu
, s
);
583 *p_rtc_irq
= qemu_allocate_irq(dino_set_timer_irq
, s
, 0);
584 *p_ser_irq
= qemu_allocate_irq(dino_set_serial_irq
, s
, 0);
589 static void dino_pcihost_class_init(ObjectClass
*klass
, void *data
)
591 DeviceClass
*dc
= DEVICE_CLASS(klass
);
593 dc
->vmsd
= &vmstate_dino
;
596 static const TypeInfo dino_pcihost_info
= {
597 .name
= TYPE_DINO_PCI_HOST_BRIDGE
,
598 .parent
= TYPE_PCI_HOST_BRIDGE
,
599 .instance_size
= sizeof(DinoState
),
600 .class_init
= dino_pcihost_class_init
,
603 static void dino_register_types(void)
605 type_register_static(&dino_pcihost_info
);
608 type_init(dino_register_types
)