initial
This commit is contained in:
commit
d2853464c3
21
.gitignore
vendored
Executable file
21
.gitignore
vendored
Executable file
@ -0,0 +1,21 @@
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*.pyc
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__pycache__
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.~*
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*.BIN
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*.bin
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*.elf
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*.d
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*.iso
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*.cdi
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*.o
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*.out
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*.gch
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scramble
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cdi4dc
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tools/ttf_outline
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tools/ttf_bitmap
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tools/ftdi_transfer
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k_means_vq
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*.blend1
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*.scramble
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*.FCStd1
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41
Makefile
Normal file
41
Makefile
Normal file
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all: main.elf
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OPT = -O2
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CSTD = -std=gnu11
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MAKEFILE_PATH := $(patsubst %/,%,$(dir $(abspath $(firstword $(MAKEFILE_LIST)))))
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LIB ?= $(MAKEFILE_PATH)/dreamcast
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CFLAGS += -D__dreamcast__
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CFLAGS += -I$(MAKEFILE_PATH)/c
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CFLAGS += -I$(MAKEFILE_PATH)/dreamcast
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CFLAGS += -I$(MAKEFILE_PATH)/
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CFLAGS += -Wno-error=strict-aliasing -fno-strict-aliasing
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CARCH = -m4-single -ml
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include dreamcast/base.mk
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include dreamcast/common.mk
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include dreamcast/headers.mk
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include dreamcast/ip.mk
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include main.mk
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%.class.o: %.class
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$(BUILD_BINARY_O)
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%.class.h: %.class
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$(BUILD_BINARY_H)
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libgcc/%.o: $(LIBGCC)
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@mkdir -p $(dir $@)
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ar x --output $(dir $@) $(LIBGCC) $(notdir $@)
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sh4-none-elf-objdump -t $@ \
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| grep -E '[.]hidden' \
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| grep -vE 'UND' \
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| cut -d' ' -f10 \
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| xargs rebind --visibility=default $@
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LIBGCC_OBJ =
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main.elf: LDSCRIPT = $(LIB)/main.lds
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main.elf: $(START_OBJ) $(MAIN_OBJ) $(LIBGCC_OBJ)
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8
main.mk
Normal file
8
main.mk
Normal file
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MAIN_OBJ = \
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$(LIB)/holly/core.o \
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$(LIB)/holly/region_array.o \
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$(LIB)/holly/background.o \
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$(LIB)/holly/ta_fifo_polygon_converter.o \
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$(LIB)/holly/video_output.o \
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$(LIB)/sh7091/serial.o \
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src/main.o
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328
src/main.cpp
Normal file
328
src/main.cpp
Normal file
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#include <stdint.h>
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#include "holly/background.hpp"
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#include "holly/core.hpp"
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#include "holly/core_bits.hpp"
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#include "holly/holly.hpp"
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#include "holly/isp_tsp.hpp"
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#include "holly/region_array.hpp"
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#include "holly/ta_bits.hpp"
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#include "holly/ta_fifo_polygon_converter.hpp"
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#include "holly/ta_global_parameter.hpp"
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#include "holly/ta_parameter.hpp"
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#include "holly/ta_vertex_parameter.hpp"
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#include "holly/texture_memory_alloc3.hpp"
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#include "holly/video_output.hpp"
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#include "sh7091/sh7091.hpp"
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#include "sh7091/sh7091_bits.hpp"
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#include "sh7091/serial.hpp"
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#include "sh7091/vbr.hpp"
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#include "systembus.hpp"
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#include "systembus_bits.hpp"
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#include "memorymap.hpp"
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#include "math/vec2.hpp"
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#include "math/vec3.hpp"
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#include "math/vec4.hpp"
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#include "math/mat4x4.hpp"
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using vec2 = vec<2, float>;
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using vec3 = vec<3, float>;
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using vec4 = vec<4, float>;
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using mat4x4 = mat<4, 4, float>;
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static inline __attribute__((always_inline)) void print_exception()
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{
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serial::string("expevt ");
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serial::integer<uint16_t>(sh7091.CCN.EXPEVT);
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serial::string("intevt ");
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serial::integer<uint16_t>(sh7091.CCN.INTEVT);
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serial::string("tra ");
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serial::integer<uint16_t>(sh7091.CCN.TRA);
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uint32_t spc;
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uint32_t ssr;
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asm volatile ("stc spc,%0" : "=r" (spc));
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asm volatile ("stc ssr,%0" : "=r" (ssr));
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serial::string("spc ");
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serial::integer(spc);
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serial::string("ssr ");
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serial::integer(ssr);
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}
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// "dreamcast/sh7091/vbr.hpp" must be included prior to defining any of
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// vbr100/vbr400/vbr600
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void vbr100()
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{
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serial::string("vbr100\n");
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print_exception();
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while (1);
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}
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void vbr400()
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{
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serial::string("vbr400");
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print_exception();
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while (1);
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}
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static int render_done = 0;
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void vbr600()
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{
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if (sh7091.CCN.EXPEVT == 0 && sh7091.CCN.INTEVT == 0x320) {
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// read Holly "normal" interrupt status
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uint32_t istnrm = system.ISTNRM;
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// read Holly "error" interrupt status
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uint32_t isterr = system.ISTERR;
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if (isterr) {
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serial::string("isterr: ");
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serial::integer<uint32_t>(system.ISTERR);
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}
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if (istnrm & istnrm::end_of_render_tsp) {
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system.ISTNRM = istnrm::end_of_render_tsp
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| istnrm::end_of_render_isp
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| istnrm::end_of_render_video;
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render_done = 1;
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return;
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}
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}
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serial::string("vbr600");
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print_exception();
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while (1);
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}
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void interrupt_init()
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{
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// disable all Holly interrupts
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system.IML2NRM = 0;
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system.IML2ERR = 0;
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system.IML2EXT = 0;
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system.IML4NRM = 0;
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system.IML4ERR = 0;
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system.IML4EXT = 0;
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system.IML6NRM = 0;
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system.IML6ERR = 0;
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system.IML6EXT = 0;
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// reset Holly interrupt status
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system.ISTERR = 0xffffffff;
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system.ISTNRM = 0xffffffff;
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// vbr100/vbr400/vbr600 will be called during interrupts/exceptions as a
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// consequence of setting vbr to __vbr_link_start.
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// See also:
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// - dreamcast/common.lds
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// - dreamcast/symbols.lds
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// - dreamcast/sh7091/vbr.hpp
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uint32_t vbr = reinterpret_cast<uint32_t>(&__vbr_link_start) - 0x100;
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asm volatile ("ldc %0,vbr" : : "r" (vbr));
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uint32_t sr;
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asm volatile ("stc sr,%0" : "=r" (sr));
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// unBLock interrupts/exceptions
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// unmask all interrupts
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sr &= ~sh::sr::bl; // BL
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sr &= ~sh::sr::imask(15); // imask
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asm volatile ("ldc %0,sr" : : "r" (sr));
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}
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void global_polygon_type_0(ta_parameter_writer& writer)
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{
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// this is the simplest possible polygon configuration:
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// - untextured
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// - packed 32-bit color
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// - not gouraud shaded
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// - no TA color calculation
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const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
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| para_control::list_type::opaque
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| obj_control::col_type::packed_color
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;
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const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
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| isp_tsp_instruction_word::culling_mode::no_culling;
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const uint32_t tsp_instruction_word = tsp_instruction_word::fog_control::no_fog
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| tsp_instruction_word::src_alpha_instr::one
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| tsp_instruction_word::dst_alpha_instr::zero
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;
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const uint32_t texture_control_word = 0;
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writer.append<ta_global_parameter::polygon_type_0>() =
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ta_global_parameter::polygon_type_0(parameter_control_word,
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isp_tsp_instruction_word,
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tsp_instruction_word,
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texture_control_word,
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0, // data_size_for_sort_dma
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0 // next_address_for_sort_dma
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);
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}
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static inline void render_triangle(ta_parameter_writer& writer,
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uint32_t base_color,
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vec3 ap,
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vec3 bp,
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vec3 cp)
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{
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writer.append<ta_vertex_parameter::polygon_type_0>() =
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ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
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ap.x, ap.y, ap.z,
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base_color
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);
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writer.append<ta_vertex_parameter::polygon_type_0>() =
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ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(false),
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bp.x, bp.y, bp.z,
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base_color
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);
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writer.append<ta_vertex_parameter::polygon_type_0>() =
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ta_vertex_parameter::polygon_type_0(polygon_vertex_parameter_control_word(true), // end of triangle strip
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cp.x, cp.y, cp.z,
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base_color
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);
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}
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void transfer_scene(ta_parameter_writer& writer)
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{
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uint32_t base_color = 0xff55aa00;
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vec3 ap = { 320.000f, 50.000f, 0.1f};
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vec3 bp = { 539.393f, 430.000f, 0.1f};
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vec3 cp = { 100.607f, 430.000f, 0.1f};
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// global_polygon_type_N only needs to be sent if the polygon type /
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// parameters change. E.g: multiple triangles that use the same texture and
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// shading configuration only need a single global_polygon_type_N
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global_polygon_type_0(writer);
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// render_triangle may be called multiple times
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render_triangle(writer,
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base_color,
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ap,
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bp,
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cp);
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// end of opaque list
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writer.append<ta_global_parameter::end_of_list>() =
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ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
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}
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uint8_t __attribute__((aligned(32))) ta_parameter_buf[1024 * 1024];
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void main()
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{
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serial::init(0);
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holly.SOFTRESET = softreset::pipeline_soft_reset
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| softreset::ta_soft_reset;
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holly.SOFTRESET = 0;
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core_init();
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interrupt_init();
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// enable end_of_render_tsp interrupt at Holly level 6
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//
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// this corresponds to (sh7091.CCN.EXPEVT == 0 && sh7091.CCN.INTEVT == 0x320)
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// via vbr600 from the CPU's perspective.
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system.IML6NRM = istnrm::end_of_render_tsp;
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const int framebuffer_width = 640;
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const int framebuffer_height = 480;
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const int tile_width = framebuffer_width / 32;
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const int tile_height = framebuffer_height / 32;
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const uint32_t ta_alloc = ta_alloc_ctrl::pt_opb::no_list
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| ta_alloc_ctrl::tm_opb::no_list
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| ta_alloc_ctrl::t_opb::no_list
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| ta_alloc_ctrl::om_opb::no_list
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| ta_alloc_ctrl::o_opb::_16x4byte;
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const int opb_size_length = 1;
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const struct opb_size opb_size[opb_size_length] = {
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{
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.opaque = 16 * 4,
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.opaque_modifier = 0,
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.translucent = 0,
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.translucent_modifier = 0,
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.punch_through = 0
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}
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};
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// Create a "region array"; this creates pointers in texture memory for each
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// of the 300 32×32px tiles in the 640x480px render output.
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region_array_multipass(tile_width,
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tile_height,
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opb_size,
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opb_size_length,
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texture_memory_alloc.region_array[0].start,
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texture_memory_alloc.object_list[0].start);
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// Create a "background" ISP/TSP parameter at address
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// texture_memory_alloc.background[0].start in texture memory.
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// This is the "background color" shown behind all other polygons.
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const uint32_t background_color = 0xff202040;
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background_parameter2(texture_memory_alloc.background[0].start,
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background_color);
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// ta_parameter_writer is used to prepare a buffer of "ta parameters"/"drawing
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// commands" for submission to the TA via DMA.
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ta_parameter_writer writer = ta_parameter_writer(ta_parameter_buf);
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// set the Dreamcast video output to "VGA" (with several other defaults
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// including a 640x480 RGB565 framebuffer).
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video_output::set_mode_vga();
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while (1) {
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// ta_polygon_converter_init2 must be called each frame, prior to sending
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// data to the TA. This re-initializes TA internal registers and
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// offsets. The TA reads from its input (in this case given via
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// DMA/ta_polygon_converter_transfer), and writes the result to texture
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// memory.
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ta_polygon_converter_init2(texture_memory_alloc.isp_tsp_parameters[0].start,
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texture_memory_alloc.isp_tsp_parameters[0].end,
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texture_memory_alloc.object_list[0].start,
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texture_memory_alloc.object_list[0].end,
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opb_size[0].total(),
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ta_alloc,
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tile_width,
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tile_height);
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// reset the ta_parameter_writer
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writer.offset = 0;
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// perform all vertex/scene calculations, storing the result in System Memory
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transfer_scene(writer);
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// write any areas of writer.buf that only exist in SH4 cache back to System Memory
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ta_polygon_converter_writeback(writer.buf, writer.offset);
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// DMA transfer from System Memory to the TA FIFO
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ta_polygon_converter_transfer(writer.buf, writer.offset);
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// wait for the TA to finish processing all TA commands
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ta_wait_opaque_list();
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// render_done flag: see vbr600
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render_done = 0;
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core_start_render2(texture_memory_alloc.region_array[0].start,
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texture_memory_alloc.isp_tsp_parameters[0].start,
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texture_memory_alloc.background[0].start,
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texture_memory_alloc.framebuffer[0].start,
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framebuffer_width);
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// wait for render completion
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while (render_done == 0) {
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asm volatile ("nop");
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};
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// wait for vsync
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while (!spg_status::vsync(holly.SPG_STATUS));
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holly.FB_R_SOF1 = texture_memory_alloc.framebuffer[0].start;
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while (spg_status::vsync(holly.SPG_STATUS));
|
||||
}
|
||||
}
|
||||
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