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https://github.com/RGBCube/serenity
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78419e858d
The `[[gnu::packed]]` attribute apparently lowered the required alignment of the structs, which caused the compiler to generate two 1 byte loads/stores on RISC-V. This caused the kernel to read/write incorrect values, as the device only seems to accept 2 byte operations.
71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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namespace Kernel {
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#define VBE_DISPI_IOPORT_INDEX 0x01CE
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#define VBE_DISPI_IOPORT_DATA 0x01CF
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#define BOCHS_DISPLAY_LITTLE_ENDIAN 0x1e1e1e1e
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#define BOCHS_DISPLAY_BIG_ENDIAN 0xbebebebe
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#define VBE_DISPI_ID5 0xB0C5
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enum class BochsFramebufferSettings {
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Enabled = 0x1,
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LinearFramebuffer = 0x40,
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};
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enum class BochsDISPIRegisters {
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ID = 0x0,
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XRES = 0x1,
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YRES = 0x2,
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BPP = 0x3,
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ENABLE = 0x4,
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BANK = 0x5,
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VIRT_WIDTH = 0x6,
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VIRT_HEIGHT = 0x7,
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X_OFFSET = 0x8,
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Y_OFFSET = 0x9,
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VIDEO_RAM_64K_CHUNKS_COUNT = 0xA,
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};
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struct DISPIInterface {
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u16 index_id;
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u16 xres;
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u16 yres;
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u16 bpp;
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u16 enable;
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u16 bank;
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u16 virt_width;
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u16 virt_height;
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u16 x_offset;
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u16 y_offset;
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u16 vram_64k_chunks_count;
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};
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static_assert(AssertSize<DISPIInterface, 22>());
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struct ExtensionRegisters {
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u32 region_size;
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u32 framebuffer_byteorder;
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};
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static_assert(AssertSize<ExtensionRegisters, 8>());
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struct BochsDisplayMMIORegisters {
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u8 edid_data[0x400];
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u16 vga_ioports[0x10];
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u8 reserved[0xE0];
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DISPIInterface bochs_regs;
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u8 reserved2[0x100 - sizeof(DISPIInterface)];
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ExtensionRegisters extension_regs;
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};
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static_assert(AssertSize<BochsDisplayMMIORegisters, 1544>());
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}
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