219 lines
6.6 KiB
C
219 lines
6.6 KiB
C
/*
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* PowerMac NVRAM emulation
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*
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* Copyright (c) 2005-2007 Fabrice Bellard
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* Copyright (c) 2007 Jocelyn Mayer
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/nvram/openbios_firmware_abi.h"
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#include "sysemu/sysemu.h"
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#include "hw/ppc/mac.h"
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#include "qemu/cutils.h"
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#include <zlib.h>
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/* debug NVR */
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//#define DEBUG_NVR
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#ifdef DEBUG_NVR
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#define NVR_DPRINTF(fmt, ...) \
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do { printf("NVR: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define NVR_DPRINTF(fmt, ...)
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#endif
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#define DEF_SYSTEM_SIZE 0xc10
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/* macio style NVRAM device */
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static void macio_nvram_writeb(void *opaque, hwaddr addr,
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uint64_t value, unsigned size)
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{
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MacIONVRAMState *s = opaque;
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addr = (addr >> s->it_shift) & (s->size - 1);
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s->data[addr] = value;
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NVR_DPRINTF("writeb addr %04" HWADDR_PRIx " val %" PRIx64 "\n",
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addr, value);
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}
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static uint64_t macio_nvram_readb(void *opaque, hwaddr addr,
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unsigned size)
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{
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MacIONVRAMState *s = opaque;
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uint32_t value;
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addr = (addr >> s->it_shift) & (s->size - 1);
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value = s->data[addr];
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NVR_DPRINTF("readb addr %04" HWADDR_PRIx " val %" PRIx32 "\n",
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addr, value);
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return value;
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}
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static const MemoryRegionOps macio_nvram_ops = {
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.read = macio_nvram_readb,
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.write = macio_nvram_writeb,
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.valid.min_access_size = 1,
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.valid.max_access_size = 4,
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.impl.min_access_size = 1,
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.impl.max_access_size = 1,
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.endianness = DEVICE_BIG_ENDIAN,
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};
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static const VMStateDescription vmstate_macio_nvram = {
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.name = "macio_nvram",
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.version_id = 1,
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.minimum_version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
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VMSTATE_END_OF_LIST()
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}
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};
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static void macio_nvram_reset(DeviceState *dev)
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{
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}
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static void macio_nvram_realizefn(DeviceState *dev, Error **errp)
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{
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SysBusDevice *d = SYS_BUS_DEVICE(dev);
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MacIONVRAMState *s = MACIO_NVRAM(dev);
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s->data = g_malloc0(s->size);
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memory_region_init_io(&s->mem, OBJECT(s), &macio_nvram_ops, s,
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"macio-nvram", s->size << s->it_shift);
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sysbus_init_mmio(d, &s->mem);
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}
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static void macio_nvram_unrealizefn(DeviceState *dev, Error **errp)
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{
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MacIONVRAMState *s = MACIO_NVRAM(dev);
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g_free(s->data);
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}
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static Property macio_nvram_properties[] = {
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DEFINE_PROP_UINT32("size", MacIONVRAMState, size, 0),
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DEFINE_PROP_UINT32("it_shift", MacIONVRAMState, it_shift, 0),
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DEFINE_PROP_END_OF_LIST()
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};
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static void macio_nvram_class_init(ObjectClass *oc, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(oc);
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dc->realize = macio_nvram_realizefn;
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dc->unrealize = macio_nvram_unrealizefn;
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dc->reset = macio_nvram_reset;
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dc->vmsd = &vmstate_macio_nvram;
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dc->props = macio_nvram_properties;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo macio_nvram_type_info = {
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.name = TYPE_MACIO_NVRAM,
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.parent = TYPE_SYS_BUS_DEVICE,
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.instance_size = sizeof(MacIONVRAMState),
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.class_init = macio_nvram_class_init,
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};
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static void macio_nvram_register_types(void)
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{
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type_register_static(&macio_nvram_type_info);
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}
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/* Set up a system OpenBIOS NVRAM partition */
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static void pmac_format_nvram_partition_of(MacIONVRAMState *nvr, int off,
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int len)
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{
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unsigned int i;
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uint32_t start = off, end;
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struct OpenBIOS_nvpart_v1 *part_header;
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// OpenBIOS nvram variables
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// Variable partition
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part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
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part_header->signature = OPENBIOS_PART_SYSTEM;
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pstrcpy(part_header->name, sizeof(part_header->name), "system");
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end = start + sizeof(struct OpenBIOS_nvpart_v1);
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for (i = 0; i < nb_prom_envs; i++)
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end = OpenBIOS_set_var(nvr->data, end, prom_envs[i]);
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// End marker
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nvr->data[end++] = '\0';
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end = start + ((end - start + 15) & ~15);
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/* XXX: OpenBIOS is not able to grow up a partition. Leave some space for
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new variables. */
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if (end < DEF_SYSTEM_SIZE)
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end = DEF_SYSTEM_SIZE;
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OpenBIOS_finish_partition(part_header, end - start);
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// free partition
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start = end;
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part_header = (struct OpenBIOS_nvpart_v1 *)&nvr->data[start];
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part_header->signature = OPENBIOS_PART_FREE;
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pstrcpy(part_header->name, sizeof(part_header->name), "free");
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end = len;
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OpenBIOS_finish_partition(part_header, end - start);
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}
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#define OSX_NVRAM_SIGNATURE (0x5A)
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/* Set up a Mac OS X NVRAM partition */
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static void pmac_format_nvram_partition_osx(MacIONVRAMState *nvr, int off,
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int len)
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{
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uint32_t start = off;
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struct OpenBIOS_nvpart_v1 *part_header;
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unsigned char *data = &nvr->data[start];
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/* empty partition */
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part_header = (struct OpenBIOS_nvpart_v1 *)data;
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part_header->signature = OSX_NVRAM_SIGNATURE;
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pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww");
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OpenBIOS_finish_partition(part_header, len);
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/* Generation */
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stl_be_p(&data[20], 2);
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/* Adler32 checksum */
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stl_be_p(&data[16], adler32(0, &data[20], len - 20));
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}
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/* Set up NVRAM with OF and OSX partitions */
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void pmac_format_nvram_partition(MacIONVRAMState *nvr, int len)
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{
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/*
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* Mac OS X expects side "B" of the flash at the second half of NVRAM,
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* so we use half of the chip for OF and the other half for a free OSX
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* partition.
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*/
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pmac_format_nvram_partition_of(nvr, 0, len / 2);
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pmac_format_nvram_partition_osx(nvr, len / 2, len / 2);
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}
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type_init(macio_nvram_register_types)
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