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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <skiboot.h>
#include <opal.h>
#include <mem_region.h>
#include <lock.h>
static struct mem_region *nvram_region;
static struct lock fake_nvram_lock = LOCK_UNLOCKED;
int fake_nvram_info(uint32_t *total_size)
{
nvram_region = find_mem_region("ibm,fake-nvram");
if (!nvram_region)
return OPAL_HARDWARE;
*total_size = nvram_region->len;
return OPAL_SUCCESS;
}
int fake_nvram_start_read(void *dst, uint32_t src, uint32_t len)
{
if (!nvram_region)
return -ENODEV;
lock(&fake_nvram_lock);
memcpy(dst, (void *) (nvram_region->start + src), len);
unlock(&fake_nvram_lock);
nvram_read_complete(true);
return 0;
}
int fake_nvram_write(uint32_t offset, void *src, uint32_t size)
{
if (!nvram_region)
return OPAL_HARDWARE;
lock(&fake_nvram_lock);
memcpy((void *) (nvram_region->start + offset), src, size);
unlock(&fake_nvram_lock);
return 0;
}
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