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
26 #include "qemu/osdep.h"
28 #include "hw/nvram/chrp_nvram.h"
29 #include "hw/ppc/mac.h"
30 #include "qemu/cutils.h"
31 #include "qemu/module.h"
38 #define NVR_DPRINTF(fmt, ...) \
39 do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
41 #define NVR_DPRINTF(fmt, ...)
44 #define DEF_SYSTEM_SIZE 0xc10
46 /* macio style NVRAM device */
47 static void macio_nvram_writeb(void *opaque
, hwaddr addr
,
48 uint64_t value
, unsigned size
)
50 MacIONVRAMState
*s
= opaque
;
52 addr
= (addr
>> s
->it_shift
) & (s
->size
- 1);
53 s
->data
[addr
] = value
;
54 NVR_DPRINTF("writeb addr %04" HWADDR_PRIx
" val %" PRIx64
"\n",
58 static uint64_t macio_nvram_readb(void *opaque
, hwaddr addr
,
61 MacIONVRAMState
*s
= opaque
;
64 addr
= (addr
>> s
->it_shift
) & (s
->size
- 1);
65 value
= s
->data
[addr
];
66 NVR_DPRINTF("readb addr %04" HWADDR_PRIx
" val %" PRIx32
"\n",
72 static const MemoryRegionOps macio_nvram_ops
= {
73 .read
= macio_nvram_readb
,
74 .write
= macio_nvram_writeb
,
75 .valid
.min_access_size
= 1,
76 .valid
.max_access_size
= 4,
77 .impl
.min_access_size
= 1,
78 .impl
.max_access_size
= 1,
79 .endianness
= DEVICE_BIG_ENDIAN
,
82 static const VMStateDescription vmstate_macio_nvram
= {
83 .name
= "macio_nvram",
85 .minimum_version_id
= 1,
86 .fields
= (VMStateField
[]) {
87 VMSTATE_VBUFFER_UINT32(data
, MacIONVRAMState
, 0, NULL
, size
),
93 static void macio_nvram_reset(DeviceState
*dev
)
97 static void macio_nvram_realizefn(DeviceState
*dev
, Error
**errp
)
99 SysBusDevice
*d
= SYS_BUS_DEVICE(dev
);
100 MacIONVRAMState
*s
= MACIO_NVRAM(dev
);
102 s
->data
= g_malloc0(s
->size
);
104 memory_region_init_io(&s
->mem
, OBJECT(s
), &macio_nvram_ops
, s
,
105 "macio-nvram", s
->size
<< s
->it_shift
);
106 sysbus_init_mmio(d
, &s
->mem
);
109 static void macio_nvram_unrealizefn(DeviceState
*dev
, Error
**errp
)
111 MacIONVRAMState
*s
= MACIO_NVRAM(dev
);
116 static Property macio_nvram_properties
[] = {
117 DEFINE_PROP_UINT32("size", MacIONVRAMState
, size
, 0),
118 DEFINE_PROP_UINT32("it_shift", MacIONVRAMState
, it_shift
, 0),
119 DEFINE_PROP_END_OF_LIST()
122 static void macio_nvram_class_init(ObjectClass
*oc
, void *data
)
124 DeviceClass
*dc
= DEVICE_CLASS(oc
);
126 dc
->realize
= macio_nvram_realizefn
;
127 dc
->unrealize
= macio_nvram_unrealizefn
;
128 dc
->reset
= macio_nvram_reset
;
129 dc
->vmsd
= &vmstate_macio_nvram
;
130 dc
->props
= macio_nvram_properties
;
131 set_bit(DEVICE_CATEGORY_MISC
, dc
->categories
);
134 static const TypeInfo macio_nvram_type_info
= {
135 .name
= TYPE_MACIO_NVRAM
,
136 .parent
= TYPE_SYS_BUS_DEVICE
,
137 .instance_size
= sizeof(MacIONVRAMState
),
138 .class_init
= macio_nvram_class_init
,
141 static void macio_nvram_register_types(void)
143 type_register_static(&macio_nvram_type_info
);
146 /* Set up a system OpenBIOS NVRAM partition */
147 static void pmac_format_nvram_partition_of(MacIONVRAMState
*nvr
, int off
,
152 /* OpenBIOS nvram variables partition */
153 sysp_end
= chrp_nvram_create_system_partition(&nvr
->data
[off
],
154 DEF_SYSTEM_SIZE
) + off
;
156 /* Free space partition */
157 chrp_nvram_create_free_partition(&nvr
->data
[sysp_end
], len
- sysp_end
);
160 #define OSX_NVRAM_SIGNATURE (0x5A)
162 /* Set up a Mac OS X NVRAM partition */
163 static void pmac_format_nvram_partition_osx(MacIONVRAMState
*nvr
, int off
,
166 uint32_t start
= off
;
167 ChrpNvramPartHdr
*part_header
;
168 unsigned char *data
= &nvr
->data
[start
];
170 /* empty partition */
171 part_header
= (ChrpNvramPartHdr
*)data
;
172 part_header
->signature
= OSX_NVRAM_SIGNATURE
;
173 pstrcpy(part_header
->name
, sizeof(part_header
->name
), "wwwwwwwwwwww");
175 chrp_nvram_finish_partition(part_header
, len
);
178 stl_be_p(&data
[20], 2);
180 /* Adler32 checksum */
181 stl_be_p(&data
[16], adler32(0, &data
[20], len
- 20));
184 /* Set up NVRAM with OF and OSX partitions */
185 void pmac_format_nvram_partition(MacIONVRAMState
*nvr
, int len
)
188 * Mac OS X expects side "B" of the flash at the second half of NVRAM,
189 * so we use half of the chip for OF and the other half for a free OSX
192 pmac_format_nvram_partition_of(nvr
, 0, len
/ 2);
193 pmac_format_nvram_partition_osx(nvr
, len
/ 2, len
/ 2);
195 type_init(macio_nvram_register_types
)