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/*
* 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.h"
#include "firmware_abi.h"
#include "sysemu/sysemu.h"
#include "ppc_mac.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
struct MacIONVRAMState {
uint32_t size;
MemoryRegion mem;
unsigned int it_shift;
uint8_t *data;
};
#define DEF_SYSTEM_SIZE 0xc10
/* Direct access to NVRAM */
uint32_t macio_nvram_read (void *opaque, uint32_t addr)
{
MacIONVRAMState *s = opaque;
uint32_t ret;
if (addr < s->size)
ret = s->data[addr];
else
ret = -1;
NVR_DPRINTF("read addr %04x val %x\n", addr, ret);
return ret;
}
void macio_nvram_write (void *opaque, uint32_t addr, uint32_t val)
{
MacIONVRAMState *s = opaque;
NVR_DPRINTF("write addr %04x val %x\n", addr, val);
if (addr < s->size)
s->data[addr] = val;
}
/* 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 %04x val %x\n", (int)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,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_macio_nvram = {
.name = "macio_nvram",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_VBUFFER_UINT32(data, MacIONVRAMState, 0, NULL, 0, size),
VMSTATE_END_OF_LIST()
}
};
static void macio_nvram_reset(void *opaque)
{
}
MacIONVRAMState *macio_nvram_init (hwaddr size,
unsigned int it_shift)
{
MacIONVRAMState *s;
s = g_malloc0(sizeof(MacIONVRAMState));
s->data = g_malloc0(size);
s->size = size;
s->it_shift = it_shift;
memory_region_init_io(&s->mem, &macio_nvram_ops, s, "macio-nvram",
size << it_shift);
vmstate_register(NULL, -1, &vmstate_macio_nvram, s);
qemu_register_reset(macio_nvram_reset, s);
return s;
}
void macio_nvram_setup_bar(MacIONVRAMState *s, MemoryRegion *bar,
hwaddr mem_base)
{
memory_region_add_subregion(bar, mem_base, &s->mem);
}
/* Set up a system OpenBIOS NVRAM partition */
void pmac_format_nvram_partition (MacIONVRAMState *nvr, int len)
{
unsigned int i;
uint32_t start = 0, end;
struct OpenBIOS_nvpart_v1 *part_header;
// OpenBIOS nvram variables
// Variable partition
part_header = (struct OpenBIOS_nvpart_v1 *)nvr->data;
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);
}
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