LXR qemu/hw/display/vga-access.h

   1/*
   2 * QEMU VGA Emulator templates
   3 *
   4 * Copyright (c) 2003 Fabrice Bellard
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25static inline uint8_t vga_read_byte(VGACommonState *vga, uint32_t addr)
  26{
  27    return vga->vram_ptr[addr & vga->vbe_size_mask];
  28}
  29
  30static inline uint16_t vga_read_word_le(VGACommonState *vga, uint32_t addr)
  31{
  32    uint32_t offset = addr & vga->vbe_size_mask & ~1;
  33    uint16_t *ptr = (uint16_t *)(vga->vram_ptr + offset);
  34    return lduw_le_p(ptr);
  35}
  36
  37static inline uint16_t vga_read_word_be(VGACommonState *vga, uint32_t addr)
  38{
  39    uint32_t offset = addr & vga->vbe_size_mask & ~1;
  40    uint16_t *ptr = (uint16_t *)(vga->vram_ptr + offset);
  41    return lduw_be_p(ptr);
  42}
  43
  44static inline uint32_t vga_read_dword_le(VGACommonState *vga, uint32_t addr)
  45{
  46    uint32_t offset = addr & vga->vbe_size_mask & ~3;
  47    uint32_t *ptr = (uint32_t *)(vga->vram_ptr + offset);
  48    return ldl_le_p(ptr);
  49}
  50