mirror of https://github.com/proxmox/mirror_qemu
201 lines
5.6 KiB
C
201 lines
5.6 KiB
C
/*
|
|
* QEMU sPAPR NVRAM emulation
|
|
*
|
|
* Copyright (C) 2012 David Gibson, IBM Corporation.
|
|
*
|
|
* 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 <libfdt.h>
|
|
|
|
#include "sysemu/device_tree.h"
|
|
#include "hw/sysbus.h"
|
|
#include "hw/ppc/spapr.h"
|
|
#include "hw/ppc/spapr_vio.h"
|
|
|
|
typedef struct sPAPRNVRAM {
|
|
VIOsPAPRDevice sdev;
|
|
uint32_t size;
|
|
uint8_t *buf;
|
|
BlockDriverState *drive;
|
|
} sPAPRNVRAM;
|
|
|
|
#define TYPE_VIO_SPAPR_NVRAM "spapr-nvram"
|
|
#define VIO_SPAPR_NVRAM(obj) \
|
|
OBJECT_CHECK(sPAPRNVRAM, (obj), TYPE_VIO_SPAPR_NVRAM)
|
|
|
|
#define MIN_NVRAM_SIZE 8192
|
|
#define DEFAULT_NVRAM_SIZE 65536
|
|
#define MAX_NVRAM_SIZE (UINT16_MAX * 16)
|
|
|
|
static void rtas_nvram_fetch(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
sPAPRNVRAM *nvram = spapr->nvram;
|
|
hwaddr offset, buffer, len;
|
|
int alen;
|
|
void *membuf;
|
|
|
|
if ((nargs != 3) || (nret != 2)) {
|
|
rtas_st(rets, 0, -3);
|
|
return;
|
|
}
|
|
|
|
if (!nvram) {
|
|
rtas_st(rets, 0, -1);
|
|
rtas_st(rets, 1, 0);
|
|
return;
|
|
}
|
|
|
|
offset = rtas_ld(args, 0);
|
|
buffer = rtas_ld(args, 1);
|
|
len = rtas_ld(args, 2);
|
|
|
|
if (((offset + len) < offset)
|
|
|| ((offset + len) > nvram->size)) {
|
|
rtas_st(rets, 0, -3);
|
|
rtas_st(rets, 1, 0);
|
|
return;
|
|
}
|
|
|
|
membuf = cpu_physical_memory_map(buffer, &len, 1);
|
|
if (nvram->drive) {
|
|
alen = bdrv_pread(nvram->drive, offset, membuf, len);
|
|
} else {
|
|
assert(nvram->buf);
|
|
|
|
memcpy(membuf, nvram->buf + offset, len);
|
|
alen = len;
|
|
}
|
|
cpu_physical_memory_unmap(membuf, len, 1, len);
|
|
|
|
rtas_st(rets, 0, (alen < len) ? -1 : 0);
|
|
rtas_st(rets, 1, (alen < 0) ? 0 : alen);
|
|
}
|
|
|
|
static void rtas_nvram_store(PowerPCCPU *cpu, sPAPREnvironment *spapr,
|
|
uint32_t token, uint32_t nargs,
|
|
target_ulong args,
|
|
uint32_t nret, target_ulong rets)
|
|
{
|
|
sPAPRNVRAM *nvram = spapr->nvram;
|
|
hwaddr offset, buffer, len;
|
|
int alen;
|
|
void *membuf;
|
|
|
|
if ((nargs != 3) || (nret != 2)) {
|
|
rtas_st(rets, 0, -3);
|
|
return;
|
|
}
|
|
|
|
if (!nvram) {
|
|
rtas_st(rets, 0, -1);
|
|
return;
|
|
}
|
|
|
|
offset = rtas_ld(args, 0);
|
|
buffer = rtas_ld(args, 1);
|
|
len = rtas_ld(args, 2);
|
|
|
|
if (((offset + len) < offset)
|
|
|| ((offset + len) > nvram->size)) {
|
|
rtas_st(rets, 0, -3);
|
|
return;
|
|
}
|
|
|
|
membuf = cpu_physical_memory_map(buffer, &len, 0);
|
|
if (nvram->drive) {
|
|
alen = bdrv_pwrite(nvram->drive, offset, membuf, len);
|
|
} else {
|
|
assert(nvram->buf);
|
|
|
|
memcpy(nvram->buf + offset, membuf, len);
|
|
alen = len;
|
|
}
|
|
cpu_physical_memory_unmap(membuf, len, 0, len);
|
|
|
|
rtas_st(rets, 0, (alen < len) ? -1 : 0);
|
|
rtas_st(rets, 1, (alen < 0) ? 0 : alen);
|
|
}
|
|
|
|
static int spapr_nvram_init(VIOsPAPRDevice *dev)
|
|
{
|
|
sPAPRNVRAM *nvram = VIO_SPAPR_NVRAM(dev);
|
|
|
|
if (nvram->drive) {
|
|
nvram->size = bdrv_getlength(nvram->drive);
|
|
} else {
|
|
nvram->size = DEFAULT_NVRAM_SIZE;
|
|
nvram->buf = g_malloc0(nvram->size);
|
|
}
|
|
|
|
if ((nvram->size < MIN_NVRAM_SIZE) || (nvram->size > MAX_NVRAM_SIZE)) {
|
|
fprintf(stderr, "spapr-nvram must be between %d and %d bytes in size\n",
|
|
MIN_NVRAM_SIZE, MAX_NVRAM_SIZE);
|
|
return -1;
|
|
}
|
|
|
|
spapr_rtas_register("nvram-fetch", rtas_nvram_fetch);
|
|
spapr_rtas_register("nvram-store", rtas_nvram_store);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spapr_nvram_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
|
|
{
|
|
sPAPRNVRAM *nvram = VIO_SPAPR_NVRAM(dev);
|
|
|
|
return fdt_setprop_cell(fdt, node_off, "#bytes", nvram->size);
|
|
}
|
|
|
|
static Property spapr_nvram_properties[] = {
|
|
DEFINE_SPAPR_PROPERTIES(sPAPRNVRAM, sdev),
|
|
DEFINE_PROP_DRIVE("drive", sPAPRNVRAM, drive),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void spapr_nvram_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass);
|
|
|
|
k->init = spapr_nvram_init;
|
|
k->devnode = spapr_nvram_devnode;
|
|
k->dt_name = "nvram";
|
|
k->dt_type = "nvram";
|
|
k->dt_compatible = "qemu,spapr-nvram";
|
|
dc->props = spapr_nvram_properties;
|
|
}
|
|
|
|
static const TypeInfo spapr_nvram_type_info = {
|
|
.name = TYPE_VIO_SPAPR_NVRAM,
|
|
.parent = TYPE_VIO_SPAPR_DEVICE,
|
|
.instance_size = sizeof(sPAPRNVRAM),
|
|
.class_init = spapr_nvram_class_init,
|
|
};
|
|
|
|
static void spapr_nvram_register_types(void)
|
|
{
|
|
type_register_static(&spapr_nvram_type_info);
|
|
}
|
|
|
|
type_init(spapr_nvram_register_types)
|