/* * PowerMac NVRAM emulation * * Copyright (c) 2005-2007 Fabrice Bellard * Copyright (c) 2007 Jocelyn Mayer * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "hw/hw.h" #include "hw/nvram/openbios_firmware_abi.h" #include "sysemu/sysemu.h" #include "hw/ppc/mac.h" #include /* debug NVR */ //#define DEBUG_NVR #ifdef DEBUG_NVR #define NVR_DPRINTF(fmt, ...) \ do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0) #else #define NVR_DPRINTF(fmt, ...) #endif #define DEF_SYSTEM_SIZE 0xc10 /* macio style NVRAM device */ static void macio_nvram_writeb(void *opaque, hwaddr addr, uint64_t value, unsigned size) { MacIONVRAMState *s = opaque; addr = (addr >> s->it_shift) & (s->size - 1); s->data[addr] = value; NVR_DPRINTF("writeb addr %04" PHYS_PRIx " val %" PRIx64 "\n", addr, value); } static uint64_t macio_nvram_readb(void *opaque, hwaddr addr, unsigned size) { MacIONVRAMState *s = opaque; uint32_t value; addr = (addr >> s->it_shift) & (s->size - 1); value = s->data[addr]; NVR_DPRINTF("readb addr %04x val %x\n", (int)addr, value); return value; } static const MemoryRegionOps macio_nvram_ops = { .read = macio_nvram_readb, .write = macio_nvram_writeb, .valid.min_access_size = 1, .valid.max_access_size = 4, .impl.min_access_size = 1, .impl.max_access_size = 1, .endianness = DEVICE_BIG_ENDIAN, }; static const VMStateDescription vmstate_macio_nvram = { .name = "macio_nvram", .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size), VMSTATE_END_OF_LIST() } }; static void macio_nvram_reset(DeviceState *dev) { } static void macio_nvram_realizefn(DeviceState *dev, Error **errp) { SysBusDevice *d = SYS_BUS_DEVICE(dev); MacIONVRAMState *s = MACIO_NVRAM(dev); s->data = g_malloc0(s->size); memory_region_init_io(&s->mem, OBJECT(s), &macio_nvram_ops, s, "macio-nvram", s->size << s->it_shift); sysbus_init_mmio(d, &s->mem); } static void macio_nvram_unrealizefn(DeviceState *dev, Error **errp) { MacIONVRAMState *s = MACIO_NVRAM(dev); g_free(s->data); } static Property macio_nvram_properties[] = { DEFINE_PROP_UINT32("size", MacIONVRAMState, size, 0), DEFINE_PROP_UINT32("it_shift", MacIONVRAMState, it_shift, 0), DEFINE_PROP_END_OF_LIST() }; static void macio_nvram_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); dc->realize = macio_nvram_realizefn; dc->unrealize = macio_nvram_unrealizefn; dc->reset = macio_nvram_reset; dc->vmsd = &vmstate_macio_nvram; dc->props = macio_nvram_properties; set_bit(DEVICE_CATEGORY_MISC, dc->categories); } static const TypeInfo macio_nvram_type_info = { .name = TYPE_MACIO_NVRAM, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(MacIONVRAMState), .class_init = macio_nvram_class_init, }; static void macio_nvram_register_types(void) { type_register_static(&macio_nvram_type_info); } /* Set up a system OpenBIOS NVRAM partition */ static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off, int len) { unsigned int i; uint32_t start = off, end; struct OpenBIOS_nvpart_v1 *part_header; // OpenBIOS nvram variables // Variable partition part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start]; part_header->signature = OPENBIOS_PART_SYSTEM; pstrcpy(part_header->name, sizeof(part_header->name), "system"); end = start + sizeof(struct OpenBIOS_nvpart_v1); for (i = 0; i < nb_prom_envs; i++) end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]); // End marker nvr->data[end++] = '\0'; end = start + ((end - start + 15) & ~15); /* XXX: OpenBIOS is not able to grow up a partition. Leave some space for new variables. */ if (end < DEF_SYSTEM_SIZE) end = DEF_SYSTEM_SIZE; OpenBIOS_finish_partition(part_header, end - start); // free partition start = end; part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start]; part_header->signature = OPENBIOS_PART_FREE; pstrcpy(part_header->name, sizeof(part_header->name), "free"); end = len; OpenBIOS_finish_partition(part_header, end - start); } #define OSX_NVRAM_SIGNATURE (0x5A) /* Set up a Mac OS X NVRAM partition */ static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off, int len) { uint32_t start = off; struct OpenBIOS_nvpart_v1 *part_header; unsigned char *data = &nvr->data[start]; /* empty partition */ part_header = (struct OpenBIOS_nvpart_v1 *)data; part_header->signature = OSX_NVRAM_SIGNATURE; pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww"); OpenBIOS_finish_partition(part_header, len); /* Generation */ stl_be_p(&data[20], 2); /* Adler32 checksum */ stl_be_p(&data[16], adler32(0, &data[20], len - 20)); } /* Set up NVRAM with OF and OSX partitions */ void pmac_format_nvram_partition(MacIONVRAMState *nvr, int len) { /* * Mac OS X expects side "B" of the flash at the second half of NVRAM, * so we use half of the chip for OF and the other half for a free OSX * partition. */ pmac_format_nvram_partition_of(nvr, 0, len / 2); pmac_format_nvram_partition_osx(nvr, len / 2, len / 2); } type_init(macio_nvram_register_types)