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/hw.h" 26 #include "hw/nvram/openbios_firmware_abi.h" 27 #include "sysemu/sysemu.h" 28 #include "hw/ppc/mac.h" 29 #include <zlib.h> 30 31 /* debug NVR */ 32 //#define DEBUG_NVR 33 34 #ifdef DEBUG_NVR 35 #define NVR_DPRINTF(fmt, ...) \ 36 do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0) 37 #else 38 #define NVR_DPRINTF(fmt, ...) 39 #endif 40 41 #define DEF_SYSTEM_SIZE 0xc10 42 43 /* macio style NVRAM device */ 44 static void macio_nvram_writeb(void *opaque, hwaddr addr, 45 uint64_t value, unsigned size) 46 { 47 MacIONVRAMState *s = opaque; 48 49 addr = (addr >> s->it_shift) & (s->size - 1); 50 s->data[addr] = value; 51 NVR_DPRINTF("writeb addr %04" PHYS_PRIx " val %" PRIx64 "\n", addr, value); 52 } 53 54 static uint64_t macio_nvram_readb(void *opaque, hwaddr addr, 55 unsigned size) 56 { 57 MacIONVRAMState *s = opaque; 58 uint32_t value; 59 60 addr = (addr >> s->it_shift) & (s->size - 1); 61 value = s->data[addr]; 62 NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value); 63 64 return value; 65 } 66 67 static const MemoryRegionOps macio_nvram_ops = { 68 .read = macio_nvram_readb, 69 .write = macio_nvram_writeb, 70 .valid.min_access_size = 1, 71 .valid.max_access_size = 4, 72 .impl.min_access_size = 1, 73 .impl.max_access_size = 1, 74 .endianness = DEVICE_BIG_ENDIAN, 75 }; 76 77 static const VMStateDescription vmstate_macio_nvram = { 78 .name = "macio_nvram", 79 .version_id = 1, 80 .minimum_version_id = 1, 81 .fields = (VMStateField[]) { 82 VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size), 83 VMSTATE_END_OF_LIST() 84 } 85 }; 86 87 88 static void macio_nvram_reset(DeviceState *dev) 89 { 90 } 91 92 static void macio_nvram_realizefn(DeviceState *dev, Error **errp) 93 { 94 SysBusDevice *d = SYS_BUS_DEVICE(dev); 95 MacIONVRAMState *s = MACIO_NVRAM(dev); 96 97 s->data = g_malloc0(s->size); 98 99 memory_region_init_io(&s->mem, OBJECT(s), &macio_nvram_ops, s, 100 "macio-nvram", s->size << s->it_shift); 101 sysbus_init_mmio(d, &s->mem); 102 } 103 104 static void macio_nvram_unrealizefn(DeviceState *dev, Error **errp) 105 { 106 MacIONVRAMState *s = MACIO_NVRAM(dev); 107 108 g_free(s->data); 109 } 110 111 static Property macio_nvram_properties[] = { 112 DEFINE_PROP_UINT32("size", MacIONVRAMState, size, 0), 113 DEFINE_PROP_UINT32("it_shift", MacIONVRAMState, it_shift, 0), 114 DEFINE_PROP_END_OF_LIST() 115 }; 116 117 static void macio_nvram_class_init(ObjectClass *oc, void *data) 118 { 119 DeviceClass *dc = DEVICE_CLASS(oc); 120 121 dc->realize = macio_nvram_realizefn; 122 dc->unrealize = macio_nvram_unrealizefn; 123 dc->reset = macio_nvram_reset; 124 dc->vmsd = &vmstate_macio_nvram; 125 dc->props = macio_nvram_properties; 126 } 127 128 static const TypeInfo macio_nvram_type_info = { 129 .name = TYPE_MACIO_NVRAM, 130 .parent = TYPE_SYS_BUS_DEVICE, 131 .instance_size = sizeof(MacIONVRAMState), 132 .class_init = macio_nvram_class_init, 133 }; 134 135 static void macio_nvram_register_types(void) 136 { 137 type_register_static(&macio_nvram_type_info); 138 } 139 140 /* Set up a system OpenBIOS NVRAM partition */ 141 static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off, 142 int len) 143 { 144 unsigned int i; 145 uint32_t start = off, end; 146 struct OpenBIOS_nvpart_v1 *part_header; 147 148 // OpenBIOS nvram variables 149 // Variable partition 150 part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start]; 151 part_header->signature = OPENBIOS_PART_SYSTEM; 152 pstrcpy(part_header->name, sizeof(part_header->name), "system"); 153 154 end = start + sizeof(struct OpenBIOS_nvpart_v1); 155 for (i = 0; i < nb_prom_envs; i++) 156 end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]); 157 158 // End marker 159 nvr->data[end++] = '\0'; 160 161 end = start + ((end - start + 15) & ~15); 162 /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for 163 new variables. */ 164 if (end < DEF_SYSTEM_SIZE) 165 end = DEF_SYSTEM_SIZE; 166 OpenBIOS_finish_partition(part_header, end - start); 167 168 // free partition 169 start = end; 170 part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start]; 171 part_header->signature = OPENBIOS_PART_FREE; 172 pstrcpy(part_header->name, sizeof(part_header->name), "free"); 173 174 end = len; 175 OpenBIOS_finish_partition(part_header, end - start); 176 } 177 178 #define OSX_NVRAM_SIGNATURE (0x5A) 179 180 /* Set up a Mac OS X NVRAM partition */ 181 static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off, 182 int len) 183 { 184 uint32_t start = off; 185 struct OpenBIOS_nvpart_v1 *part_header; 186 unsigned char *data = &nvr->data[start]; 187 188 /* empty partition */ 189 part_header = (struct OpenBIOS_nvpart_v1 *)data; 190 part_header->signature = OSX_NVRAM_SIGNATURE; 191 pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww"); 192 193 OpenBIOS_finish_partition(part_header, len); 194 195 /* Generation */ 196 stl_be_p(&data[20], 2); 197 198 /* Adler32 checksum */ 199 stl_be_p(&data[16], adler32(0, &data[20], len - 20)); 200 } 201 202 /* Set up NVRAM with OF and OSX partitions */ 203 void pmac_format_nvram_partition(MacIONVRAMState *nvr, int len) 204 { 205 /* 206 * Mac OS X expects side "B" of the flash at the second half of NVRAM, 207 * so we use half of the chip for OF and the other half for a free OSX 208 * partition. 209 */ 210 pmac_format_nvram_partition_of(nvr, 0, len / 2); 211 pmac_format_nvram_partition_osx(nvr, len / 2, len / 2); 212 } 213 type_init(macio_nvram_register_types) 214