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#include <stdarg.h>
#include <stddef.h>
#include "demo.h"
#include "float16.h"
#define GFX_VRAM_BASE 0x38000000
#define GFX_CMD_BASE 0x3c000000
#define GFX_CMD_SCAN (*(volatile unsigned *)(GFX_CMD_BASE + 4))
#define GFX_CMD_HEADER_BASE (*(volatile unsigned *)(GFX_CMD_BASE + 8))
#define GFX_CMD_HEADER_SIZE (*(volatile unsigned *)(GFX_CMD_BASE + 12))
#define GFX_CMD_FB_BASE_A (*(volatile unsigned *)(GFX_CMD_BASE + 16))
#define GFX_CMD_FB_BASE_B (*(volatile unsigned *)(GFX_CMD_BASE + 20))
#define FB_BASE_A 0x000000
#define FB_BASE_B 0x200000
#define HEADER_BASE 0x400000
#define HEADER_SIZE (1 - 1)
#define CODE_BASE 0x500000
#define DATA_BASE 0x600000
#define VRAM_HEADER_CODE_BASE ((unsigned *)(GFX_VRAM_BASE + HEADER_BASE + 0))
#define VRAM_HEADER_CODE_SIZE ((unsigned *)(GFX_VRAM_BASE + HEADER_BASE + 4))
#define VRAM_HEADER_DATA_BASE ((unsigned *)(GFX_VRAM_BASE + HEADER_BASE + 8))
#define VRAM_HEADER_DATA_SIZE ((unsigned *)(GFX_VRAM_BASE + HEADER_BASE + 12))
#define VRAM_CODE ((unsigned *)(GFX_VRAM_BASE + CODE_BASE))
#define VRAM_DATA ((short *)(GFX_VRAM_BASE + DATA_BASE))
static int swap_buffers;
static unsigned clear_color;
static unsigned data_size;
extern const unsigned char _binary_obj_conspiracion_demo_gfx_rom_bin_end[];
extern const unsigned char _binary_obj_conspiracion_demo_gfx_rom_bin_start[];
static void gfx_write_scan(int do_clear)
{
unsigned word = 0x02000000;
word |= clear_color;
if (swap_buffers)
word |= 0x01000000;
if (do_clear)
word |= 0x04000000;
GFX_CMD_SCAN = word;
}
void gfx_init(void)
{
data_size = 0;
clear_color = 0;
swap_buffers = 0;
gfx_write_scan(1);
GFX_CMD_FB_BASE_A = FB_BASE_A;
GFX_CMD_FB_BASE_B = FB_BASE_B;
GFX_CMD_HEADER_BASE = HEADER_BASE;
const unsigned char *start = _binary_obj_conspiracion_demo_gfx_rom_bin_start;
unsigned length = (unsigned)&_binary_obj_conspiracion_demo_gfx_rom_bin_end[0] - (unsigned)start;
print("gfx: loading %u bytes program at %p", length, start);
for (unsigned i = 0; i < length / 4; ++i) {
unsigned word
= (unsigned)start[4 * i]
| (unsigned)start[4 * i + 1] << 8
| (unsigned)start[4 * i + 2] << 16
| (unsigned)start[4 * i + 3] << 24;
VRAM_CODE[i] = word;
}
*VRAM_HEADER_CODE_BASE = CODE_BASE;
*VRAM_HEADER_CODE_SIZE = length / 4 - 1;
*VRAM_HEADER_DATA_BASE = DATA_BASE;
*VRAM_HEADER_DATA_SIZE = 0;
}
void gfx_clear(void)
{
data_size = 0;
*VRAM_HEADER_DATA_SIZE = 0;
gfx_write_scan(1);
}
void gfx_swap(void)
{
swap_buffers = !swap_buffers;
gfx_write_scan(0);
}
void gfx_draw(void)
{
GFX_CMD_HEADER_SIZE = HEADER_SIZE;
}
void gfx_bg(unsigned color)
{
clear_color = color;
gfx_write_scan(0);
}
void gfx_data(unsigned block, unsigned lane, short data[static 4])
{
unsigned vec_num = block << 2 | lane;
for (unsigned i = 0; i < 4; ++i)
VRAM_DATA[vec_num << 2 | i] = data[i];
if (vec_num + 1 > data_size) {
data_size = vec_num + 1;
*VRAM_HEADER_DATA_SIZE = data_size;
}
}
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