92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* Copyright (c) 2009, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <debug.h>
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#include <reg.h>
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#include <sys/types.h>
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#include <platform/iomap.h>
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#include "smem.h"
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static struct smem *smem = (void *)(MSM_SHARED_BASE);
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/* buf MUST be 4byte aligned, and len MUST be a multiple of 8. */
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unsigned smem_read_alloc_entry(smem_mem_type_t type, void *buf, int len)
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{
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struct smem_alloc_info *ainfo;
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unsigned *dest = buf;
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unsigned src;
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unsigned size;
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if (((len & 0x3) != 0) || (((unsigned)buf & 0x3) != 0))
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return 1;
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if (type < SMEM_FIRST_VALID_TYPE || type > SMEM_LAST_VALID_TYPE)
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return 1;
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/* TODO: Use smem spinlocks */
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ainfo = &smem->alloc_info[type];
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if (readl(&ainfo->allocated) == 0)
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return 1;
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size = readl(&ainfo->size);
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if (size != (unsigned)((len + 7) & ~0x00000007))
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return 1;
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src = MSM_SHARED_BASE + readl(&ainfo->offset);
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for (; len > 0; src += 4, len -= 4)
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*(dest++) = readl(src);
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return 0;
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}
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unsigned smem_read_alloc_entry_offset(smem_mem_type_t type, void *buf, int len, int offset)
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{
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struct smem_alloc_info *ainfo;
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unsigned *dest = buf;
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unsigned src;
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unsigned size = len;
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if (((len & 0x3) != 0) || (((unsigned)buf & 0x3) != 0))
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return 1;
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if (type < SMEM_FIRST_VALID_TYPE || type > SMEM_LAST_VALID_TYPE)
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return 1;
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ainfo = &smem->alloc_info[type];
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if (readl(&ainfo->allocated) == 0)
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return 1;
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src = MSM_SHARED_BASE + readl(&ainfo->offset) + offset;
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for (; size > 0; src += 4, size -= 4)
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*(dest++) = readl(src);
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return 0;
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}
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