qemu/hw/nvram/mac_nvram.c
Halil Pasic 59046ec29a migration: consolidate VMStateField.start
The member VMStateField.start is used for two things, partial data
migration for VBUFFER data (basically provide migration for a
sub-buffer) and for locating next in QTAILQ.

The implementation of the VBUFFER feature is broken when VMSTATE_ALLOC
is used. This however goes unnoticed because actually partial migration
for VBUFFER is not used at all.

Let's consolidate the usage of VMStateField.start by removing support
for partial migration for VBUFFER.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>

Message-Id: <20170203175217.45562-1-pasic@linux.vnet.ibm.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-02-13 17:27:13 +00:00

194 lines
5.8 KiB
C

/*
* 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 "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/nvram/chrp_nvram.h"
#include "hw/ppc/mac.h"
#include "qemu/cutils.h"
#include <zlib.h>
/* 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" HWADDR_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 %04" HWADDR_PRIx " val %" PRIx32 "\n",
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, 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)
{
int sysp_end;
/* OpenBIOS nvram variables partition */
sysp_end = chrp_nvram_create_system_partition(&nvr->data[off],
DEF_SYSTEM_SIZE) + off;
/* Free space partition */
chrp_nvram_create_free_partition(&nvr->data[sysp_end], len - sysp_end);
}
#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;
ChrpNvramPartHdr *part_header;
unsigned char *data = &nvr->data[start];
/* empty partition */
part_header = (ChrpNvramPartHdr *)data;
part_header->signature = OSX_NVRAM_SIGNATURE;
pstrcpy(part_header->name, sizeof(part_header->name), "wwwwwwwwwwww");
chrp_nvram_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)