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1.1 root 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"
1.1.1.2 root 26: #include "firmware_abi.h"
27: #include "sysemu.h"
1.1 root 28: #include "ppc_mac.h"
29:
1.1.1.2 root 30: /* debug NVR */
31: //#define DEBUG_NVR
32:
33: #ifdef DEBUG_NVR
1.1.1.3 root 34: #define NVR_DPRINTF(fmt, ...) \
35: do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
1.1.1.2 root 36: #else
1.1.1.3 root 37: #define NVR_DPRINTF(fmt, ...)
1.1.1.2 root 38: #endif
39:
1.1 root 40: struct MacIONVRAMState {
41: target_phys_addr_t size;
42: int mem_index;
1.1.1.2 root 43: unsigned int it_shift;
44: uint8_t *data;
1.1 root 45: };
46:
1.1.1.2 root 47: #define DEF_SYSTEM_SIZE 0xc10
48:
1.1 root 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:
1.1.1.2 root 55: if (addr < s->size)
1.1 root 56: ret = s->data[addr];
57: else
58: ret = -1;
1.1.1.2 root 59: NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
1.1 root 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:
1.1.1.2 root 68: NVR_DPRINTF("write addr %04x val %x\n", addr, val);
69: if (addr < s->size)
1.1 root 70: s->data[addr] = val;
71: }
72:
73: /* macio style NVRAM device */
74: static void macio_nvram_writeb (void *opaque,
75: target_phys_addr_t addr, uint32_t value)
76: {
77: MacIONVRAMState *s = opaque;
78:
1.1.1.2 root 79: addr = (addr >> s->it_shift) & (s->size - 1);
1.1 root 80: s->data[addr] = value;
1.1.1.2 root 81: NVR_DPRINTF("writeb addr %04x val %x\n", (int)addr, value);
1.1 root 82: }
83:
84: static uint32_t macio_nvram_readb (void *opaque, target_phys_addr_t addr)
85: {
86: MacIONVRAMState *s = opaque;
87: uint32_t value;
88:
1.1.1.2 root 89: addr = (addr >> s->it_shift) & (s->size - 1);
1.1 root 90: value = s->data[addr];
1.1.1.2 root 91: NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value);
1.1 root 92:
93: return value;
94: }
95:
1.1.1.4 ! root 96: static CPUWriteMemoryFunc * const nvram_write[] = {
1.1 root 97: &macio_nvram_writeb,
98: &macio_nvram_writeb,
99: &macio_nvram_writeb,
100: };
101:
1.1.1.4 ! root 102: static CPUReadMemoryFunc * const nvram_read[] = {
1.1 root 103: &macio_nvram_readb,
104: &macio_nvram_readb,
105: &macio_nvram_readb,
106: };
107:
1.1.1.2 root 108: static void macio_nvram_save(QEMUFile *f, void *opaque)
109: {
110: MacIONVRAMState *s = (MacIONVRAMState *)opaque;
111:
112: qemu_put_buffer(f, s->data, s->size);
113: }
114:
115: static int macio_nvram_load(QEMUFile *f, void *opaque, int version_id)
116: {
117: MacIONVRAMState *s = (MacIONVRAMState *)opaque;
118:
119: if (version_id != 1)
120: return -EINVAL;
121:
122: qemu_get_buffer(f, s->data, s->size);
123:
124: return 0;
125: }
126:
127: static void macio_nvram_reset(void *opaque)
128: {
129: }
130:
131: MacIONVRAMState *macio_nvram_init (int *mem_index, target_phys_addr_t size,
132: unsigned int it_shift)
1.1 root 133: {
134: MacIONVRAMState *s;
135:
136: s = qemu_mallocz(sizeof(MacIONVRAMState));
1.1.1.2 root 137: s->data = qemu_mallocz(size);
1.1 root 138: s->size = size;
1.1.1.2 root 139: s->it_shift = it_shift;
140:
1.1.1.3 root 141: s->mem_index = cpu_register_io_memory(nvram_read, nvram_write, s);
1.1 root 142: *mem_index = s->mem_index;
1.1.1.2 root 143: register_savevm("macio_nvram", -1, 1, macio_nvram_save, macio_nvram_load,
144: s);
145: qemu_register_reset(macio_nvram_reset, s);
1.1 root 146:
147: return s;
148: }
149:
150: void macio_nvram_map (void *opaque, target_phys_addr_t mem_base)
151: {
152: MacIONVRAMState *s;
153:
154: s = opaque;
1.1.1.2 root 155: cpu_register_physical_memory(mem_base, s->size << s->it_shift,
156: s->mem_index);
1.1 root 157: }
158:
1.1.1.2 root 159: /* Set up a system OpenBIOS NVRAM partition */
1.1 root 160: void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
161: {
1.1.1.2 root 162: unsigned int i;
163: uint32_t start = 0, end;
164: struct OpenBIOS_nvpart_v1 *part_header;
165:
166: // OpenBIOS nvram variables
167: // Variable partition
168: part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
169: part_header->signature = OPENBIOS_PART_SYSTEM;
170: pstrcpy(part_header->name, sizeof(part_header->name), "system");
171:
172: end = start + sizeof(struct OpenBIOS_nvpart_v1);
173: for (i = 0; i < nb_prom_envs; i++)
174: end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
175:
176: // End marker
177: nvr->data[end++] = '\0';
178:
179: end = start + ((end - start + 15) & ~15);
180: /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
181: new variables. */
182: if (end < DEF_SYSTEM_SIZE)
183: end = DEF_SYSTEM_SIZE;
184: OpenBIOS_finish_partition(part_header, end - start);
185:
186: // free partition
187: start = end;
188: part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
189: part_header->signature = OPENBIOS_PART_FREE;
190: pstrcpy(part_header->name, sizeof(part_header->name), "free");
1.1 root 191:
1.1.1.2 root 192: end = len;
193: OpenBIOS_finish_partition(part_header, end - start);
1.1 root 194: }
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