1 | /* |
2 | * PowerMac NVRAM emulation |
3 | * |
4 | * Copyright (c) 2005-2007 Fabrice Bellard |
5 | * Copyright (c) 2007 Jocelyn Mayer |
6 | * |
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: |
13 | * |
14 | * The above copyright notice and this permission notice shall be included in |
15 | * all copies or substantial portions of the Software. |
16 | * |
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 |
23 | * THE SOFTWARE. |
24 | */ |
25 | |
26 | #include "qemu/osdep.h" |
27 | #include "hw/nvram/chrp_nvram.h" |
28 | #include "hw/ppc/mac.h" |
29 | #include "hw/qdev-properties.h" |
30 | #include "migration/vmstate.h" |
31 | #include "qemu/cutils.h" |
32 | #include "qemu/module.h" |
33 | #include <zlib.h> |
34 | |
35 | /* debug NVR */ |
36 | //#define DEBUG_NVR |
37 | |
38 | #ifdef DEBUG_NVR |
39 | #define NVR_DPRINTF(fmt, ...) \ |
40 | do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0) |
41 | #else |
42 | #define NVR_DPRINTF(fmt, ...) |
43 | #endif |
44 | |
45 | #define DEF_SYSTEM_SIZE 0xc10 |
46 | |
47 | /* macio style NVRAM device */ |
48 | static void macio_nvram_writeb(void *opaque, hwaddr addr, |
49 | uint64_t value, unsigned size) |
50 | { |
51 | MacIONVRAMState *s = opaque; |
52 | |
53 | addr = (addr >> s->it_shift) & (s->size - 1); |
54 | s->data[addr] = value; |
55 | NVR_DPRINTF("writeb addr %04" HWADDR_PRIx " val %" PRIx64 "\n" , |
56 | addr, value); |
57 | } |
58 | |
59 | static uint64_t macio_nvram_readb(void *opaque, hwaddr addr, |
60 | unsigned size) |
61 | { |
62 | MacIONVRAMState *s = opaque; |
63 | uint32_t value; |
64 | |
65 | addr = (addr >> s->it_shift) & (s->size - 1); |
66 | value = s->data[addr]; |
67 | NVR_DPRINTF("readb addr %04" HWADDR_PRIx " val %" PRIx32 "\n" , |
68 | addr, value); |
69 | |
70 | return value; |
71 | } |
72 | |
73 | static const MemoryRegionOps macio_nvram_ops = { |
74 | .read = macio_nvram_readb, |
75 | .write = macio_nvram_writeb, |
76 | .valid.min_access_size = 1, |
77 | .valid.max_access_size = 4, |
78 | .impl.min_access_size = 1, |
79 | .impl.max_access_size = 1, |
80 | .endianness = DEVICE_BIG_ENDIAN, |
81 | }; |
82 | |
83 | static const VMStateDescription vmstate_macio_nvram = { |
84 | .name = "macio_nvram" , |
85 | .version_id = 1, |
86 | .minimum_version_id = 1, |
87 | .fields = (VMStateField[]) { |
88 | VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, size), |
89 | VMSTATE_END_OF_LIST() |
90 | } |
91 | }; |
92 | |
93 | |
94 | static void macio_nvram_reset(DeviceState *dev) |
95 | { |
96 | } |
97 | |
98 | static void macio_nvram_realizefn(DeviceState *dev, Error **errp) |
99 | { |
100 | SysBusDevice *d = SYS_BUS_DEVICE(dev); |
101 | MacIONVRAMState *s = MACIO_NVRAM(dev); |
102 | |
103 | s->data = g_malloc0(s->size); |
104 | |
105 | memory_region_init_io(&s->mem, OBJECT(s), &macio_nvram_ops, s, |
106 | "macio-nvram" , s->size << s->it_shift); |
107 | sysbus_init_mmio(d, &s->mem); |
108 | } |
109 | |
110 | static void macio_nvram_unrealizefn(DeviceState *dev, Error **errp) |
111 | { |
112 | MacIONVRAMState *s = MACIO_NVRAM(dev); |
113 | |
114 | g_free(s->data); |
115 | } |
116 | |
117 | static Property macio_nvram_properties[] = { |
118 | DEFINE_PROP_UINT32("size" , MacIONVRAMState, size, 0), |
119 | DEFINE_PROP_UINT32("it_shift" , MacIONVRAMState, it_shift, 0), |
120 | DEFINE_PROP_END_OF_LIST() |
121 | }; |
122 | |
123 | static void macio_nvram_class_init(ObjectClass *oc, void *data) |
124 | { |
125 | DeviceClass *dc = DEVICE_CLASS(oc); |
126 | |
127 | dc->realize = macio_nvram_realizefn; |
128 | dc->unrealize = macio_nvram_unrealizefn; |
129 | dc->reset = macio_nvram_reset; |
130 | dc->vmsd = &vmstate_macio_nvram; |
131 | dc->props = macio_nvram_properties; |
132 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
133 | } |
134 | |
135 | static const TypeInfo macio_nvram_type_info = { |
136 | .name = TYPE_MACIO_NVRAM, |
137 | .parent = TYPE_SYS_BUS_DEVICE, |
138 | .instance_size = sizeof(MacIONVRAMState), |
139 | .class_init = macio_nvram_class_init, |
140 | }; |
141 | |
142 | static void macio_nvram_register_types(void) |
143 | { |
144 | type_register_static(&macio_nvram_type_info); |
145 | } |
146 | |
147 | /* Set up a system OpenBIOS NVRAM partition */ |
148 | static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off, |
149 | int len) |
150 | { |
151 | int sysp_end; |
152 | |
153 | /* OpenBIOS nvram variables partition */ |
154 | sysp_end = chrp_nvram_create_system_partition(&nvr->data[off], |
155 | DEF_SYSTEM_SIZE) + off; |
156 | |
157 | /* Free space partition */ |
158 | chrp_nvram_create_free_partition(&nvr->data[sysp_end], len - sysp_end); |
159 | } |
160 | |
161 | #define OSX_NVRAM_SIGNATURE (0x5A) |
162 | |
163 | /* Set up a Mac OS X NVRAM partition */ |
164 | static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off, |
165 | int len) |
166 | { |
167 | uint32_t start = off; |
168 | ChrpNvramPartHdr *; |
169 | unsigned char *data = &nvr->data[start]; |
170 | |
171 | /* empty partition */ |
172 | part_header = (ChrpNvramPartHdr *)data; |
173 | part_header->signature = OSX_NVRAM_SIGNATURE; |
174 | pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww" ); |
175 | |
176 | chrp_nvram_finish_partition(part_header, len); |
177 | |
178 | /* Generation */ |
179 | stl_be_p(&data[20], 2); |
180 | |
181 | /* Adler32 checksum */ |
182 | stl_be_p(&data[16], adler32(0, &data[20], len - 20)); |
183 | } |
184 | |
185 | /* Set up NVRAM with OF and OSX partitions */ |
186 | void pmac_format_nvram_partition(MacIONVRAMState *nvr, int len) |
187 | { |
188 | /* |
189 | * Mac OS X expects side "B" of the flash at the second half of NVRAM, |
190 | * so we use half of the chip for OF and the other half for a free OSX |
191 | * partition. |
192 | */ |
193 | pmac_format_nvram_partition_of(nvr, 0, len / 2); |
194 | pmac_format_nvram_partition_osx(nvr, len / 2, len / 2); |
195 | } |
196 | type_init(macio_nvram_register_types) |
197 | |