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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
! 34: #define NVR_DPRINTF(fmt, args...) \
! 35: do { printf("NVR: " fmt , ##args); } while (0)
! 36: #else
! 37: #define NVR_DPRINTF(fmt, args...)
! 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:
96: static CPUWriteMemoryFunc *nvram_write[] = {
97: &macio_nvram_writeb,
98: &macio_nvram_writeb,
99: &macio_nvram_writeb,
100: };
101:
102: static CPUReadMemoryFunc *nvram_read[] = {
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 root 141: s->mem_index = cpu_register_io_memory(0, nvram_read, nvram_write, s);
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);
! 146: macio_nvram_reset(s);
1.1 root 147:
148: return s;
149: }
150:
151: void macio_nvram_map (void *opaque, target_phys_addr_t mem_base)
152: {
153: MacIONVRAMState *s;
154:
155: s = opaque;
1.1.1.2 ! root 156: cpu_register_physical_memory(mem_base, s->size << s->it_shift,
! 157: s->mem_index);
1.1 root 158: }
159:
1.1.1.2 ! root 160: /* Set up a system OpenBIOS NVRAM partition */
1.1 root 161: void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
162: {
1.1.1.2 ! root 163: unsigned int i;
! 164: uint32_t start = 0, end;
! 165: struct OpenBIOS_nvpart_v1 *part_header;
! 166:
! 167: // OpenBIOS nvram variables
! 168: // Variable partition
! 169: part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
! 170: part_header->signature = OPENBIOS_PART_SYSTEM;
! 171: pstrcpy(part_header->name, sizeof(part_header->name), "system");
! 172:
! 173: end = start + sizeof(struct OpenBIOS_nvpart_v1);
! 174: for (i = 0; i < nb_prom_envs; i++)
! 175: end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
! 176:
! 177: // End marker
! 178: nvr->data[end++] = '\0';
! 179:
! 180: end = start + ((end - start + 15) & ~15);
! 181: /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
! 182: new variables. */
! 183: if (end < DEF_SYSTEM_SIZE)
! 184: end = DEF_SYSTEM_SIZE;
! 185: OpenBIOS_finish_partition(part_header, end - start);
! 186:
! 187: // free partition
! 188: start = end;
! 189: part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
! 190: part_header->signature = OPENBIOS_PART_FREE;
! 191: pstrcpy(part_header->name, sizeof(part_header->name), "free");
1.1 root 192:
1.1.1.2 ! root 193: end = len;
! 194: OpenBIOS_finish_partition(part_header, end - start);
1.1 root 195: }
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