linux/drivers/gpu/drm/amd/include/atom-bits.h
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   1/*
   2 * Copyright 2008 Advanced Micro Devices, Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Author: Stanislaw Skowronek
  23 */
  24
  25#ifndef ATOM_BITS_H
  26#define ATOM_BITS_H
  27
  28static inline uint8_t get_u8(void *bios, int ptr)
  29{
  30    return ((unsigned char *)bios)[ptr];
  31}
  32#define U8(ptr) get_u8(ctx->ctx->bios, (ptr))
  33#define CU8(ptr) get_u8(ctx->bios, (ptr))
  34static inline uint16_t get_u16(void *bios, int ptr)
  35{
  36    return get_u8(bios ,ptr)|(((uint16_t)get_u8(bios, ptr+1))<<8);
  37}
  38#define U16(ptr) get_u16(ctx->ctx->bios, (ptr))
  39#define CU16(ptr) get_u16(ctx->bios, (ptr))
  40static inline uint32_t get_u32(void *bios, int ptr)
  41{
  42    return get_u16(bios, ptr)|(((uint32_t)get_u16(bios, ptr+2))<<16);
  43}
  44#define U32(ptr) get_u32(ctx->ctx->bios, (ptr))
  45#define CU32(ptr) get_u32(ctx->bios, (ptr))
  46#define CSTR(ptr) (((char *)(ctx->bios))+(ptr))
  47
  48#endif
  49