linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / mac_nvram.c
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 #include "hw.h"
26 #include "firmware_abi.h"
27 #include "sysemu.h"
28 #include "ppc_mac.h"
29
30 /* debug NVR */
31 //#define DEBUG_NVR
32
33 #ifdef DEBUG_NVR
34 #define NVR_DPRINTF(fmt, ...) \
35 do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
36 #else
37 #define NVR_DPRINTF(fmt, ...)
38 #endif
39
40 struct MacIONVRAMState {
41 uint32_t size;
42 MemoryRegion mem;
43 unsigned int it_shift;
44 uint8_t *data;
45 };
46
47 #define DEF_SYSTEM_SIZE 0xc10
48
49 /* Direct access to NVRAM */
50 uint32_t macio_nvram_read (void *opaque, uint32_t addr)
51 {
52 MacIONVRAMState *s = opaque;
53 uint32_t ret;
54
55 if (addr < s->size)
56 ret = s->data[addr];
57 else
58 ret = -1;
59 NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
60
61 return ret;
62 }
63
64 void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val)
65 {
66 MacIONVRAMState *s = opaque;
67
68 NVR_DPRINTF("write addr %04x val %x\n", addr, val);
69 if (addr < s->size)
70 s->data[addr] = val;
71 }
72
73 /* macio style NVRAM device */
74 static void macio_nvram_writeb(void *opaque, target_phys_addr_t addr,
75 uint64_t value, unsigned size)
76 {
77 MacIONVRAMState *s = opaque;
78
79 addr = (addr >> s->it_shift) & (s->size - 1);
80 s->data[addr] = value;
81 NVR_DPRINTF("writeb addr %04x val %x\n", (int)addr, value);
82 }
83
84 static uint64_t macio_nvram_readb(void *opaque, target_phys_addr_t addr,
85 unsigned size)
86 {
87 MacIONVRAMState *s = opaque;
88 uint32_t value;
89
90 addr = (addr >> s->it_shift) & (s->size - 1);
91 value = s->data[addr];
92 NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
93
94 return value;
95 }
96
97 static const MemoryRegionOps macio_nvram_ops = {
98 .read = macio_nvram_readb,
99 .write = macio_nvram_writeb,
100 .endianness = DEVICE_NATIVE_ENDIAN,
101 };
102
103 static const VMStateDescription vmstate_macio_nvram = {
104 .name = "macio_nvram",
105 .version_id = 1,
106 .minimum_version_id = 1,
107 .minimum_version_id_old = 1,
108 .fields = (VMStateField[]) {
109 VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
110 VMSTATE_END_OF_LIST()
111 }
112 };
113
114
115 static void macio_nvram_reset(void *opaque)
116 {
117 }
118
119 MacIONVRAMState *macio_nvram_init (target_phys_addr_t size,
120 unsigned int it_shift)
121 {
122 MacIONVRAMState *s;
123
124 s = g_malloc0(sizeof(MacIONVRAMState));
125 s->data = g_malloc0(size);
126 s->size = size;
127 s->it_shift = it_shift;
128
129 memory_region_init_io(&s->mem, &macio_nvram_ops, s, "macio-nvram",
130 size << it_shift);
131 vmstate_register(NULL, -1, &vmstate_macio_nvram, s);
132 qemu_register_reset(macio_nvram_reset, s);
133
134 return s;
135 }
136
137 void macio_nvram_setup_bar(MacIONVRAMState *s, MemoryRegion *bar,
138 target_phys_addr_t mem_base)
139 {
140 memory_region_add_subregion(bar, mem_base, &s->mem);
141 }
142
143 /* Set up a system OpenBIOS NVRAM partition */
144 void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
145 {
146 unsigned int i;
147 uint32_t start = 0, end;
148 struct OpenBIOS_nvpart_v1 *part_header;
149
150 // OpenBIOS nvram variables
151 // Variable partition
152 part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
153 part_header->signature = OPENBIOS_PART_SYSTEM;
154 pstrcpy(part_header->name, sizeof(part_header->name), "system");
155
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]);
159
160 // End marker
161 nvr->data[end++] = '\0';
162
163 end = start + ((end - start + 15) & ~15);
164 /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
165 new variables. */
166 if (end < DEF_SYSTEM_SIZE)
167 end = DEF_SYSTEM_SIZE;
168 OpenBIOS_finish_partition(part_header, end - start);
169
170 // free partition
171 start = end;
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");
175
176 end = len;
177 OpenBIOS_finish_partition(part_header, end - start);
178 }