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