vga-access.h (1944B)
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 25 static inline uint8_t vga_read_byte(VGACommonState *vga, uint32_t addr) 26 { 27 return vga->vram_ptr[addr & vga->vbe_size_mask]; 28 } 29 30 static 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 37 static 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 44 static 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 }