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