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// SPDX-License-Identifier: Apache-2.0
/* Copyright 2013-2017 IBM Corp. */
#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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