mirror of
https://github.com/Ed94/pikuma_ps1.git
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ed
e04bcb91b4
Will not be doing most of the course in assembly for now. Assemblers are missing a bunch of ergonomics not related to to instruction abstraction. Mostly related to offset and data typw width calulations and how to ergonomically utilize those symbols within the assembly syntax. The GNU gas macros are terrible and struct member resolution must be done manually. There is no utilities for doing stack allocations with alignment in mind either, no way to get info on the system's calling convention for foreign symbols (not even as a diagnostic, etc). C is a terrible for inline assembly, and gas doesn't support grabbing C struct info from header files (even though they are part of the same toolchain collection). There is no utilities for doing stack allocations with alignment in mind either, no way to get info on the system's calling convention for foreign symbols (not even as a diagnostic, etc). Low-level dev really is in a catch 22 of bad tooling.
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
#ifdef INTELLISENSE_DIRECTIVES
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# pragma once
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# include "dsl.h"
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# include "math.h"
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#endif
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typedef def_enum(U32, gp_Commands) {
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gcmd_Reset = 0b000,
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gcmd_Polygon = 0b001,
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gcmd_Line = 0b010,
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gcmd_Rect = 0b011,
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gcmd_VM_to_VM = 0b100,
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gcmd_CPU_to_VM = 0b101,
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gcmd_VM_to_CPU = 0b110,
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gcmd_Environment = 0b111,
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gcmd_SetDrawMode = 0xE1,
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gcmd_SetTextureWindow = 0xE2,
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gcmd_SetDrawArea_TopLeft = 0xE3,
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gcmd_SetDrawArea_BotRight = 0xE4,
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gcmd_SetDrawOffset = 0xE5,
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gcmd_SetMaskBit = 0xE6,
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gcmd_ResetCommandBuffer = 0x01,
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gcmd_AcknowledgeGPUInterrupt = 0x02,
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gcmd_DisplayEnable = 0x03,
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gcmd_DMA_Request = 0x04,
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gcmd_DispArea_Start = 0x05,
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gcmd_HorizontalDisplayRange = 0x06,
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gcmd_VerticalDisplayRange = 0x07,
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gcmd_DisplayMode = 0x08,
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gcmd_SetVramSize = 0x09,
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};
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#define gpio_port0 0x1810
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#define gpio_port1 0x1814
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#define gcmd_offset 24
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#define gp_Reset (gcmd_Reset << gcmd_offset)
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#define gp_DisplayEnabled (gcmd_DisplayEnable << gcmd_offset | 0x0)
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#define gp_DisplayDisabled (gcmd_DisplayEnable << gcmd_offset | 0x1)
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#define gp_DMA_FIFO 1
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#define gp_DMA_CPU_to_GPU 2
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#define gp_DMA_GPU_to_CPU 3
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#define gp_DMA_Request (gcmd_DMA_Request << gcmd_offset)
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#define gp_HorizontalDisplayRange_3168_608 (gcmd_HorizontalDisplayRange << gcmd_offset | 0xC60 << 12 | 0x260)
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#define gp_VerticalDiplayRange (gcmd_VerticalDisplayRange << gcmd_offset)
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#define gp_VerticalDisplayRange_264_24 (gp_VerticalDiplayRange | 264 << 10 | 24)
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#define gp_VerticalDisplayRange_504_24 (gp_VerticalDiplayRange | 504 << 10 | 24)
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#define gp_DisplayMode (gcmd_DisplayMode << gcmd_offset)
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#define gp_Disp_HRes_256 (0x0)
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#define gp_Disp_HRes_320 (0x1)
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#define gp_Disp_HRes_512 (0x2)
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#define gp_Disp_HRes_640 (0x3)
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#define gp_Disp_VRes_240 (0x0 << 2)
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#define gp_Disp_VRes_480 (0x1 << 2)
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#define gp_Disp_Color15 (0x0 << 4)
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#define gp_Disp_Color24 (0x1 << 4)
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#define gp_Disp_VInterlace (0x1 << 5)
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#define gp_DisplayMode_320x240_15bit_NTSC (gp_DisplayMode | gp_Disp_HRes_320 | gp_Disp_VRes_240 | gp_Disp_Color15)
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#define gp_DisplayMOde_640x480_24bbp_NTSC (gp_DisplayMode | gp_Disp_HRes_640 | gp_Disp_VRes_480 | gp_Disp_Color24 | gp_Disp_VInterlace)
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#define gp_DrawMode_DrawAllowed 10
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#define gp_SetDrawMode_DrawAllowed (gcmd_SetDrawMode << gcmd_offset | 0x1 << gp_DrawMode_DrawAllowed)
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#define gp_SetArea_TopLeft (gcmd_SetDrawArea_TopLeft << gcmd_offset)
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#define gp_SetArea_BottomRight (gcmd_SetDrawArea_BotRight << gcmd_offset)
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typedef def_struct(RGB8) { BYTE r; BYTE g; BYTE b; };
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typedef BYTE gp_Pixel16[1];
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typedef BYTE gp_Pixel24[3];
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#define gp_b10_X 0
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#define gp_b10_Y 10
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#define gp_b16_X 0
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#define gp_b16_Y 16
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typedef def_struct(gp_Vec2) { U16 y; U16 x; };
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#if 1
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void gp_screen_init(void) __asm__("gp_screen_init_asm");
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#else
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#define gp_screen_init() gp_screen_init_c11()
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#endif
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