qemu-e2k/hw/display/vga-access.h

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/*
* QEMU VGA Emulator templates
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
static inline uint8_t vga_read_byte(VGACommonState *vga, uint32_t addr)
{
return vga->vram_ptr[addr & vga->vbe_size_mask];
}
static inline uint16_t vga_read_word_le(VGACommonState *vga, uint32_t addr)
{
uint32_t offset = addr & vga->vbe_size_mask & ~1;
uint16_t *ptr = (uint16_t *)(vga->vram_ptr + offset);
return lduw_le_p(ptr);
}
static inline uint16_t vga_read_word_be(VGACommonState *vga, uint32_t addr)
{
uint32_t offset = addr & vga->vbe_size_mask & ~1;
uint16_t *ptr = (uint16_t *)(vga->vram_ptr + offset);
return lduw_be_p(ptr);
}
static inline uint32_t vga_read_dword_le(VGACommonState *vga, uint32_t addr)
{
uint32_t offset = addr & vga->vbe_size_mask & ~3;
uint32_t *ptr = (uint32_t *)(vga->vram_ptr + offset);
return ldl_le_p(ptr);
}