2 * QEMU PowerPC PowerNV XSCOM bus
4 * Copyright (c) 2016, IBM Corporation.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "qemu/module.h"
23 #include "sysemu/hw_accel.h"
24 #include "target/ppc/cpu.h"
25 #include "hw/sysbus.h"
27 #include "hw/ppc/fdt.h"
28 #include "hw/ppc/pnv.h"
29 #include "hw/ppc/pnv_xscom.h"
34 #define PRD_P8_IPOLL_REG_MASK 0x01020013
35 #define PRD_P8_IPOLL_REG_STATUS 0x01020014
36 #define PRD_P9_IPOLL_REG_MASK 0x000F0033
37 #define PRD_P9_IPOLL_REG_STATUS 0x000F0034
40 #define P8_PBA_BAR0 0x2013f00
41 #define P8_PBA_BAR2 0x2013f02
42 #define P8_PBA_BARMASK0 0x2013f04
43 #define P8_PBA_BARMASK2 0x2013f06
44 #define P9_PBA_BAR0 0x5012b00
45 #define P9_PBA_BAR2 0x5012b02
46 #define P9_PBA_BARMASK0 0x5012b04
47 #define P9_PBA_BARMASK2 0x5012b06
49 static void xscom_complete(CPUState
*cs
, uint64_t hmer_bits
)
52 * TODO: When the read/write comes from the monitor, NULL is
53 * passed for the cpu, and no CPU completion is generated.
56 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
57 CPUPPCState
*env
= &cpu
->env
;
60 * TODO: Need a CPU helper to set HMER, also handle generation
63 cpu_synchronize_state(cs
);
64 env
->spr
[SPR_HMER
] |= hmer_bits
;
68 static uint32_t pnv_xscom_pcba(PnvChip
*chip
, uint64_t addr
)
70 addr
&= (PNV_XSCOM_SIZE
- 1);
72 if (pnv_chip_is_power9(chip
)) {
75 return ((addr
>> 4) & ~0xfull
) | ((addr
>> 3) & 0xf);
79 static uint64_t xscom_read_default(PnvChip
*chip
, uint32_t pcba
)
83 return PNV_CHIP_GET_CLASS(chip
)->chip_cfam_id
;
84 case 0x18002: /* ECID2 */
88 return PNV9_HOMER_BASE(chip
);
90 return PNV_HOMER_BASE(chip
);
92 case P9_PBA_BARMASK0
: /* P9 homer region size */
93 return PNV9_HOMER_SIZE
;
94 case P8_PBA_BARMASK0
: /* P8 homer region size */
95 return PNV_HOMER_SIZE
;
97 case P9_PBA_BAR2
: /* P9 occ common area */
98 return PNV9_OCC_COMMON_AREA(chip
);
99 case P8_PBA_BAR2
: /* P8 occ common area */
100 return PNV_OCC_COMMON_AREA(chip
);
102 case P9_PBA_BARMASK2
: /* P9 occ common area size */
103 return PNV9_OCC_COMMON_AREA_SIZE
;
104 case P8_PBA_BARMASK2
: /* P8 occ common area size */
105 return PNV_OCC_COMMON_AREA_SIZE
;
107 case 0x1010c00: /* PIBAM FIR */
108 case 0x1010c03: /* PIBAM FIR MASK */
111 case PRD_P8_IPOLL_REG_MASK
:
112 case PRD_P8_IPOLL_REG_STATUS
:
113 case PRD_P9_IPOLL_REG_MASK
:
114 case PRD_P9_IPOLL_REG_STATUS
:
117 case 0x0090018: /* Receive status reg */
118 case 0x0090012: /* log register */
119 case 0x0090013: /* error register */
122 case 0x2020007: /* ADU stuff, log register */
123 case 0x2020009: /* ADU stuff, error register */
124 case 0x202000f: /* ADU stuff, receive status register*/
126 case 0x2013f01: /* PBA stuff */
127 case 0x2013f03: /* PBA stuff */
128 case 0x2013f05: /* PBA stuff */
129 case 0x2013f07: /* PBA stuff */
131 case 0x2013028: /* CAPP stuff */
132 case 0x201302a: /* CAPP stuff */
133 case 0x2013801: /* CAPP stuff */
134 case 0x2013802: /* CAPP stuff */
151 static bool xscom_write_default(PnvChip
*chip
, uint32_t pcba
, uint64_t val
)
153 /* We ignore writes to these */
155 case 0xf000f: /* chip id is RO */
156 case 0x1010c00: /* PIBAM FIR */
157 case 0x1010c01: /* PIBAM FIR */
158 case 0x1010c02: /* PIBAM FIR */
159 case 0x1010c03: /* PIBAM FIR MASK */
160 case 0x1010c04: /* PIBAM FIR MASK */
161 case 0x1010c05: /* PIBAM FIR MASK */
163 case 0x0090018: /* Receive status reg */
164 case 0x0090012: /* log register */
165 case 0x0090013: /* error register */
168 case 0x2020007: /* ADU stuff, log register */
169 case 0x2020009: /* ADU stuff, error register */
170 case 0x202000f: /* ADU stuff, receive status register*/
172 case 0x2013028: /* CAPP stuff */
173 case 0x201302a: /* CAPP stuff */
174 case 0x2013801: /* CAPP stuff */
175 case 0x2013802: /* CAPP stuff */
187 /* P8 PRD registers */
188 case PRD_P8_IPOLL_REG_MASK
:
189 case PRD_P8_IPOLL_REG_STATUS
:
190 case PRD_P9_IPOLL_REG_MASK
:
191 case PRD_P9_IPOLL_REG_STATUS
:
198 static uint64_t xscom_read(void *opaque
, hwaddr addr
, unsigned width
)
200 PnvChip
*chip
= opaque
;
201 uint32_t pcba
= pnv_xscom_pcba(chip
, addr
);
205 /* Handle some SCOMs here before dispatch */
206 val
= xscom_read_default(chip
, pcba
);
211 val
= address_space_ldq(&chip
->xscom_as
, (uint64_t) pcba
<< 3,
212 MEMTXATTRS_UNSPECIFIED
, &result
);
213 if (result
!= MEMTX_OK
) {
214 qemu_log_mask(LOG_GUEST_ERROR
, "XSCOM read failed at @0x%"
215 HWADDR_PRIx
" pcba=0x%08x\n", addr
, pcba
);
216 xscom_complete(current_cpu
, HMER_XSCOM_FAIL
| HMER_XSCOM_DONE
);
221 xscom_complete(current_cpu
, HMER_XSCOM_DONE
);
225 static void xscom_write(void *opaque
, hwaddr addr
, uint64_t val
,
228 PnvChip
*chip
= opaque
;
229 uint32_t pcba
= pnv_xscom_pcba(chip
, addr
);
232 /* Handle some SCOMs here before dispatch */
233 if (xscom_write_default(chip
, pcba
, val
)) {
237 address_space_stq(&chip
->xscom_as
, (uint64_t) pcba
<< 3, val
,
238 MEMTXATTRS_UNSPECIFIED
, &result
);
239 if (result
!= MEMTX_OK
) {
240 qemu_log_mask(LOG_GUEST_ERROR
, "XSCOM write failed at @0x%"
241 HWADDR_PRIx
" pcba=0x%08x data=0x%" PRIx64
"\n",
243 xscom_complete(current_cpu
, HMER_XSCOM_FAIL
| HMER_XSCOM_DONE
);
248 xscom_complete(current_cpu
, HMER_XSCOM_DONE
);
251 const MemoryRegionOps pnv_xscom_ops
= {
253 .write
= xscom_write
,
254 .valid
.min_access_size
= 8,
255 .valid
.max_access_size
= 8,
256 .impl
.min_access_size
= 8,
257 .impl
.max_access_size
= 8,
258 .endianness
= DEVICE_BIG_ENDIAN
,
261 void pnv_xscom_realize(PnvChip
*chip
, uint64_t size
, Error
**errp
)
263 SysBusDevice
*sbd
= SYS_BUS_DEVICE(chip
);
266 name
= g_strdup_printf("xscom-%x", chip
->chip_id
);
267 memory_region_init_io(&chip
->xscom_mmio
, OBJECT(chip
), &pnv_xscom_ops
,
269 sysbus_init_mmio(sbd
, &chip
->xscom_mmio
);
271 memory_region_init(&chip
->xscom
, OBJECT(chip
), name
, size
);
272 address_space_init(&chip
->xscom_as
, &chip
->xscom
, name
);
276 static const TypeInfo pnv_xscom_interface_info
= {
277 .name
= TYPE_PNV_XSCOM_INTERFACE
,
278 .parent
= TYPE_INTERFACE
,
279 .class_size
= sizeof(PnvXScomInterfaceClass
),
282 static void pnv_xscom_register_types(void)
284 type_register_static(&pnv_xscom_interface_info
);
287 type_init(pnv_xscom_register_types
)
289 typedef struct ForeachPopulateArgs
{
292 } ForeachPopulateArgs
;
294 static int xscom_dt_child(Object
*child
, void *opaque
)
296 if (object_dynamic_cast(child
, TYPE_PNV_XSCOM_INTERFACE
)) {
297 ForeachPopulateArgs
*args
= opaque
;
298 PnvXScomInterface
*xd
= PNV_XSCOM_INTERFACE(child
);
299 PnvXScomInterfaceClass
*xc
= PNV_XSCOM_INTERFACE_GET_CLASS(xd
);
302 _FDT((xc
->dt_xscom(xd
, args
->fdt
, args
->xscom_offset
)));
308 static const char compat_p8
[] = "ibm,power8-xscom\0ibm,xscom";
309 static const char compat_p9
[] = "ibm,power9-xscom\0ibm,xscom";
311 int pnv_dt_xscom(PnvChip
*chip
, void *fdt
, int root_offset
)
315 ForeachPopulateArgs args
;
318 if (pnv_chip_is_power9(chip
)) {
319 reg
[0] = cpu_to_be64(PNV9_XSCOM_BASE(chip
));
320 reg
[1] = cpu_to_be64(PNV9_XSCOM_SIZE
);
322 reg
[0] = cpu_to_be64(PNV_XSCOM_BASE(chip
));
323 reg
[1] = cpu_to_be64(PNV_XSCOM_SIZE
);
326 name
= g_strdup_printf("xscom@%" PRIx64
, be64_to_cpu(reg
[0]));
327 xscom_offset
= fdt_add_subnode(fdt
, root_offset
, name
);
330 _FDT((fdt_setprop_cell(fdt
, xscom_offset
, "ibm,chip-id", chip
->chip_id
)));
331 _FDT((fdt_setprop_cell(fdt
, xscom_offset
, "#address-cells", 1)));
332 _FDT((fdt_setprop_cell(fdt
, xscom_offset
, "#size-cells", 1)));
333 _FDT((fdt_setprop(fdt
, xscom_offset
, "reg", reg
, sizeof(reg
))));
335 if (pnv_chip_is_power9(chip
)) {
336 _FDT((fdt_setprop(fdt
, xscom_offset
, "compatible", compat_p9
,
337 sizeof(compat_p9
))));
339 _FDT((fdt_setprop(fdt
, xscom_offset
, "compatible", compat_p8
,
340 sizeof(compat_p8
))));
343 _FDT((fdt_setprop(fdt
, xscom_offset
, "scom-controller", NULL
, 0)));
346 args
.xscom_offset
= xscom_offset
;
348 object_child_foreach(OBJECT(chip
), xscom_dt_child
, &args
);
352 void pnv_xscom_add_subregion(PnvChip
*chip
, hwaddr offset
, MemoryRegion
*mr
)
354 memory_region_add_subregion(&chip
->xscom
, offset
<< 3, mr
);
357 void pnv_xscom_region_init(MemoryRegion
*mr
,
358 struct Object
*owner
,
359 const MemoryRegionOps
*ops
,
364 memory_region_init_io(mr
, owner
, ops
, opaque
, name
, size
<< 3);