2 * PowerMac NVRAM emulation
4 * Copyright (c) 2005-2007 Fabrice Bellard
5 * Copyright (c) 2007 Jocelyn Mayer
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "qemu/osdep.h"
27 #include "hw/nvram/openbios_firmware_abi.h"
28 #include "sysemu/sysemu.h"
29 #include "hw/ppc/mac.h"
36 #define NVR_DPRINTF(fmt, ...) \
37 do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
39 #define NVR_DPRINTF(fmt, ...)
42 #define DEF_SYSTEM_SIZE 0xc10
44 /* macio style NVRAM device */
45 static void macio_nvram_writeb(void *opaque
, hwaddr addr
,
46 uint64_t value
, unsigned size
)
48 MacIONVRAMState
*s
= opaque
;
50 addr
= (addr
>> s
->it_shift
) & (s
->size
- 1);
51 s
->data
[addr
] = value
;
52 NVR_DPRINTF("writeb addr %04" PHYS_PRIx
" val %" PRIx64
"\n", addr
, value
);
55 static uint64_t macio_nvram_readb(void *opaque
, hwaddr addr
,
58 MacIONVRAMState
*s
= opaque
;
61 addr
= (addr
>> s
->it_shift
) & (s
->size
- 1);
62 value
= s
->data
[addr
];
63 NVR_DPRINTF("readb addr %04x val %x\n", (int)addr
, value
);
68 static const MemoryRegionOps macio_nvram_ops
= {
69 .read
= macio_nvram_readb
,
70 .write
= macio_nvram_writeb
,
71 .valid
.min_access_size
= 1,
72 .valid
.max_access_size
= 4,
73 .impl
.min_access_size
= 1,
74 .impl
.max_access_size
= 1,
75 .endianness
= DEVICE_BIG_ENDIAN
,
78 static const VMStateDescription vmstate_macio_nvram
= {
79 .name
= "macio_nvram",
81 .minimum_version_id
= 1,
82 .fields
= (VMStateField
[]) {
83 VMSTATE_VBUFFER_UINT32(data
, MacIONVRAMState
, 0, NULL
, 0, size
),
89 static void macio_nvram_reset(DeviceState
*dev
)
93 static void macio_nvram_realizefn(DeviceState
*dev
, Error
**errp
)
95 SysBusDevice
*d
= SYS_BUS_DEVICE(dev
);
96 MacIONVRAMState
*s
= MACIO_NVRAM(dev
);
98 s
->data
= g_malloc0(s
->size
);
100 memory_region_init_io(&s
->mem
, OBJECT(s
), &macio_nvram_ops
, s
,
101 "macio-nvram", s
->size
<< s
->it_shift
);
102 sysbus_init_mmio(d
, &s
->mem
);
105 static void macio_nvram_unrealizefn(DeviceState
*dev
, Error
**errp
)
107 MacIONVRAMState
*s
= MACIO_NVRAM(dev
);
112 static Property macio_nvram_properties
[] = {
113 DEFINE_PROP_UINT32("size", MacIONVRAMState
, size
, 0),
114 DEFINE_PROP_UINT32("it_shift", MacIONVRAMState
, it_shift
, 0),
115 DEFINE_PROP_END_OF_LIST()
118 static void macio_nvram_class_init(ObjectClass
*oc
, void *data
)
120 DeviceClass
*dc
= DEVICE_CLASS(oc
);
122 dc
->realize
= macio_nvram_realizefn
;
123 dc
->unrealize
= macio_nvram_unrealizefn
;
124 dc
->reset
= macio_nvram_reset
;
125 dc
->vmsd
= &vmstate_macio_nvram
;
126 dc
->props
= macio_nvram_properties
;
127 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
130 static const TypeInfo macio_nvram_type_info
= {
131 .name
= TYPE_MACIO_NVRAM
,
132 .parent
= TYPE_SYS_BUS_DEVICE
,
133 .instance_size
= sizeof(MacIONVRAMState
),
134 .class_init
= macio_nvram_class_init
,
137 static void macio_nvram_register_types(void)
139 type_register_static(&macio_nvram_type_info
);
142 /* Set up a system OpenBIOS NVRAM partition */
143 static void pmac_format_nvram_partition_of(MacIONVRAMState
*nvr
, int off
,
147 uint32_t start
= off
, end
;
148 struct OpenBIOS_nvpart_v1
*part_header
;
150 // OpenBIOS nvram variables
151 // Variable partition
152 part_header
= (struct OpenBIOS_nvpart_v1
*)&nvr
->data
[start
];
153 part_header
->signature
= OPENBIOS_PART_SYSTEM
;
154 pstrcpy(part_header
->name
, sizeof(part_header
->name
), "system");
156 end
= start
+ sizeof(struct OpenBIOS_nvpart_v1
);
157 for (i
= 0; i
< nb_prom_envs
; i
++)
158 end
= OpenBIOS_set_var(nvr
->data
, end
, prom_envs
[i
]);
161 nvr
->data
[end
++] = '\0';
163 end
= start
+ ((end
- start
+ 15) & ~15);
164 /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
166 if (end
< DEF_SYSTEM_SIZE
)
167 end
= DEF_SYSTEM_SIZE
;
168 OpenBIOS_finish_partition(part_header
, end
- start
);
172 part_header
= (struct OpenBIOS_nvpart_v1
*)&nvr
->data
[start
];
173 part_header
->signature
= OPENBIOS_PART_FREE
;
174 pstrcpy(part_header
->name
, sizeof(part_header
->name
), "free");
177 OpenBIOS_finish_partition(part_header
, end
- start
);
180 #define OSX_NVRAM_SIGNATURE (0x5A)
182 /* Set up a Mac OS X NVRAM partition */
183 static void pmac_format_nvram_partition_osx(MacIONVRAMState
*nvr
, int off
,
186 uint32_t start
= off
;
187 struct OpenBIOS_nvpart_v1
*part_header
;
188 unsigned char *data
= &nvr
->data
[start
];
190 /* empty partition */
191 part_header
= (struct OpenBIOS_nvpart_v1
*)data
;
192 part_header
->signature
= OSX_NVRAM_SIGNATURE
;
193 pstrcpy(part_header
->name
, sizeof(part_header
->name
), "wwwwwwwwwwww");
195 OpenBIOS_finish_partition(part_header
, len
);
198 stl_be_p(&data
[20], 2);
200 /* Adler32 checksum */
201 stl_be_p(&data
[16], adler32(0, &data
[20], len
- 20));
204 /* Set up NVRAM with OF and OSX partitions */
205 void pmac_format_nvram_partition(MacIONVRAMState
*nvr
, int len
)
208 * Mac OS X expects side "B" of the flash at the second half of NVRAM,
209 * so we use half of the chip for OF and the other half for a free OSX
212 pmac_format_nvram_partition_of(nvr
, 0, len
/ 2);
213 pmac_format_nvram_partition_osx(nvr
, len
/ 2, len
/ 2);
215 type_init(macio_nvram_register_types
)