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minor adjustmnets to some headers (doing a review pass)

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ed
2026-07-10 19:51:41 -04:00
parent fa598a41c6
commit c22e4baa41
3 changed files with 38 additions and 52 deletions
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code/duffle/gp.h
+11 -23
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@@ -51,10 +51,7 @@
* tape-side macros that pin a register to hold the IO base and access
* ports via offsets — `lui $reg, 0x1F80` (1 word) then `sw $data,
* GPIO_PORT*_OFFSET($reg)` (1 word). Mirrors the `IO_BASE_ADDR equ
* 0x1F80` + `gpio_port0 equ 0x1810` pattern from graphics_hello/gp.s.
*
* See lottes_tape.h `R_GpIoBase` + `mac_gp0_send_imm` for the
* wave-context form that composes these primitives. */
* 0x1F80` + `gpio_port0 equ 0x1810` pattern from graphics_hello/gp.s. */
enum {
IO_BASE_ADDR = 0x1F800000, /* full 32-bit I/O region base */
IO_BASE_ADDR_HI16 = 0x1F80, /* fits in a single `lui $reg, 0x1F80` */
@@ -120,8 +117,7 @@ enum {
gp0_cmd_tile_8 = 0x68,
gp0_cmd_tile_16 = 0x70,
/* State setters (not drawing primitives; set render context).
* Per PSX-SPX graphicsprocessingunitgpu.md §"GP0 Other Commands". */
/* State setters (not drawing primitives; set render context). */
gp0_cmd_DrawModeSetting = 0xE1, /* TPage / draw-mode (semi-trans, dither, etc.) */
gp0_cmd_SetTextureWindow = 0xE2,
gp0_cmd_SetDrawArea_TopLeft = 0xE3,
@@ -130,9 +126,7 @@ enum {
gp0_cmd_SetMaskBit = 0xE6,
/* bitfield shifts / widths / masks ----
*
* Generic GP0/GP1 command byte (upper 8 bits of every word sent
* to either port). Used by `enc_gp0_cmd(cmd)` and friends below. */
* Generic GP0/GP1 command byte (upper 8 bits of every word sent to either port). */
gp0_cmd_shift = 24,
gp0_cmd_width = 8,
gp0_cmd_mask = 0xFF,
@@ -294,12 +288,6 @@ enum {
* Common command words for boot-time GPU init and standard
* display configurations. Each one is a pure compile-time integer
* constant ready to drop into a `.word` directive.
*
* These are the equivalents of the `gp_HorizontalDisplayRange_3168_608`,
* `gp_VerticalDisplayRange_264_24`, `gp_DisplayMode_320x240_15bit_NTSC`,
* `gp_SetDrawMode_DrawAllowed`, `gp_DMA_*` `.equ`s from the pre-rewrite
* gp.h / graphics_hello/gp.s, rebuilt using the layer-cake encoders so
* no magic numbers appear in any body.
* ============================================================================ */
/* ---- Display enable (1-bit payload on DisplayEnable cmd) ---- */
@@ -391,8 +379,8 @@ typedef Struct_(RGB8) { B1 r; B1 g; B1 b; };
/* ---------- PolyTag (the OT-link header; 1 word) ---------- */
enum {
polytag_len_bits = 8,
polytag_addr_bits = 24,
PolyTag_len_bits = 8,
PolyTag_addr_bits = 24,
};
typedef Struct_(PolyTag) {
union {
@@ -468,7 +456,7 @@ typedef Struct_(Poly_FT3) {
V2_S2 p2; U1 u2; U1 v2;
};
/* ---------- Poly_FT4 (Flat Textured Quad; placeholder layout) ---------- */
/* ---------- Poly_FT4 (Flat Textured Quad) ---------- */
typedef Struct_(Poly_FT4) {
U4 tag;
RGB8 color;
@@ -481,7 +469,7 @@ typedef Struct_(Poly_FT4) {
V2_S2 p3; U1 u3; U1 v3;
};
/* ---------- Poly_GT3 (Gouraud Textured Triangle; placeholder layout) ---------- */
/* ---------- Poly_GT3 (Gouraud Textured Triangle) ---------- */
typedef Struct_(Poly_GT3) {
U4 tag; RGB8 c0; B1 code;
V2_S2 p0; RGB8 c1; B1 pad1;
@@ -494,7 +482,7 @@ typedef Struct_(Poly_GT3) {
V2_S2 tp2; U1 u2; U1 v2;
};
/* ---------- Poly_GT4 (Gouraud Textured Quad; placeholder layout) ---------- */
/* ---------- Poly_GT4 (Gouraud Textured Quad) ---------- */
typedef Struct_(Poly_GT4) {
U4 tag; RGB8 c0; B1 code;
V2_S2 p0; RGB8 c1; B1 pad1;
@@ -509,7 +497,7 @@ typedef Struct_(Poly_GT4) {
V2_S2 tp3; U1 u3; U1 v3;
};
/* ---------- Primitive setters (C-level, no emitted words) ----------
/* ---------- Primitive setters (C-level) ----------
* DSL cast convention: every cast via C_(), every pointer via R_/V_. */
#define set_poly_f3(p) set_len(p, 4), C_(Poly_F3_R, p)->code = gp0_cmd_poly_f3
#define set_poly_ft3(p) set_len(p, 7), C_(Poly_FT3_R,p)->code = gp0_cmd_poly_ft3
@@ -647,7 +635,7 @@ enum {
*
* Future?: add `tim_load_to_vram(tim_ptr, vram_addr)` that
* emits the necessary GP0 commands. Stoppped for now at the
* struct + enum level for this track.
* struct + enum level.
* ============================================================================ */
enum {
tim_file_id_magic = 0x10,
@@ -660,7 +648,7 @@ enum {
};
typedef Struct_(TIM_Header) {
U4 file_id; /* always 0x10 = "TIM" magic */
U4 file_id; /* always 0x10 = "TIM" magic */
U4 version; /* ignored; always 0 */
U4 flags; /* bits 0..2 = type, bit 3 = has_clut */
};