chore: remove unnecessary value in vram update fn
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7e2ab0fa6d
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103
src/core/ppu.zig
103
src/core/ppu.zig
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@ -243,7 +243,6 @@ pub const Vram = struct {
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return .{ .raw = (vram_d << 1) | vram_c };
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}
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const Range = struct { min: u32, max: u32 };
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const Kind = enum {
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a,
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b,
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@ -271,113 +270,77 @@ pub const Vram = struct {
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}
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};
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/// max inclusive
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fn range(comptime kind: Kind, mst: u3, offset: u2) Range {
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// TODO: Rename
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fn range(comptime kind: Kind, mst: u3, offset: u2) u32 {
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const ofs: u32 = offset;
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// panic messages are from GBATEK
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return switch (kind) {
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.a => switch (mst) {
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0 => .{ .min = 0x0680_0000, .max = 0x0682_0000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * ofs);
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0640_0000 + (0x0002_0000 * (ofs & 0b01));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0680_0000,
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1 => 0x0600_0000 + (0x0002_0000 * ofs),
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2 => 0x0640_0000 + (0x0002_0000 * (ofs & 0b01)),
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3 => @panic("VRAMCNT_A: Slot OFS(0-3)"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.b => switch (mst) {
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0 => .{ .min = 0x0682_0000, .max = 0x0684_0000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * ofs);
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0640_0000 + (0x0002_0000 * (ofs & 0b01));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0682_0000,
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1 => 0x0600_0000 + (0x0002_0000 * ofs),
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2 => 0x0640_0000 + (0x0002_0000 * (ofs & 0b01)),
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3 => @panic("VRAMCNT_B: Slot OFS(0-3)"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.c => switch (mst) {
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0 => .{ .min = 0x0684_0000, .max = 0x0686_0000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * ofs);
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * (ofs & 0b01));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0684_0000,
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1 => 0x0600_0000 + (0x0002_0000 * ofs),
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2 => 0x0600_0000 + (0x0002_0000 * (ofs & 0b01)),
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3 => @panic("VRAMCNT_C: Slot OFS(0-3)"),
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4 => .{ .min = 0x0620_0000, .max = 0x0620_0000 + kind.size() },
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4 => 0x0620_0000,
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.d => switch (mst) {
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0 => .{ .min = 0x0686_0000, .max = 0x0688_0000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * ofs);
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0600_0000 + (0x0002_0000 * (ofs & 0b01));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0686_0000,
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1 => 0x0600_0000 + (0x0002_0000 * ofs),
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2 => 0x0600_0000 + (0x0002_0000 * (ofs & 0b01)),
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3 => @panic("VRAMCNT_D: Slot OFS(0-3)"),
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4 => .{ .min = 0x0660_0000, .max = 0x0660_0000 + kind.size() },
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4 => 0x0660_0000,
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.e => switch (mst) {
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0 => .{ .min = 0x0688_0000, .max = 0x0689_0000 },
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1 => .{ .min = 0x0600_0000, .max = 0x0600_0000 + kind.size() },
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2 => .{ .min = 0x0640_0000, .max = 0x0640_0000 + kind.size() },
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0 => 0x0688_0000,
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1 => 0x0600_0000,
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2 => 0x0640_0000,
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3 => @panic("VRAMCNT_E: Slots 0-3"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.f => switch (mst) {
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0 => .{ .min = 0x0689_0000, .max = 0x0689_4000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0640_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0689_0000,
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1 => 0x0600_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1)),
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2 => 0x0640_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1)),
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3 => @panic("VRAMCNT_F: Slot (OFS.0*1)+(OFS.1*4)"),
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4 => @panic("VRAMCNT_F: Slot 0-1 (OFS=0), Slot 2-3 (OFS=1)"),
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5 => @panic("VRAMCNT_F: Slot 0"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.g => switch (mst) {
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0 => .{ .min = 0x0689_4000, .max = 0x0689_8000 },
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1 => blk: {
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const base = 0x0600_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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2 => blk: {
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const base = 0x0640_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1));
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break :blk .{ .min = base, .max = base + kind.size() };
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},
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0 => 0x0689_4000,
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1 => 0x0600_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1)),
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2 => 0x0640_0000 + (0x0000_4000 * (ofs & 0b01)) + (0x0001_0000 * (ofs >> 1)),
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3 => @panic("VRAMCNT_G: Slot (OFS.0*1)+(OFS.1*4)"),
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4 => @panic("VRAMCNT_G: Slot 0-1 (OFS=0), Slot 2-3 (OFS=1)"),
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5 => @panic("VRAMCNT_G: Slot 0"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.h => switch (mst) {
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0 => .{ .min = 0x0689_8000, .max = 0x068A_0000 },
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1 => .{ .min = 0x0620_0000, .max = 0x0620_0000 + kind.size() },
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0 => 0x0689_8000,
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1 => 0x0620_0000,
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2 => @panic("VRAMCNT_H: Slot 0-3"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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.i => switch (mst) {
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0 => .{ .min = 0x068A_0000, .max = 0x068A_4000 },
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1 => .{ .min = 0x0620_8000, .max = 0x0620_8000 + kind.size() },
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2 => .{ .min = 0x0660_0000, .max = 0x0660_0000 + kind.size() },
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0 => 0x068A_0000,
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1 => 0x0620_8000,
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2 => 0x0660_0000,
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3 => @panic("Slot 0"),
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else => std.debug.panic("Invalid MST for VRAMCNT_{s}", .{[_]u8{std.ascii.toUpper(@tagName(kind)[0])}}),
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},
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@ -430,6 +393,7 @@ pub const Vram = struct {
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};
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}
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// TODO: We always update the entirety of VRAM when that argubably isn't necessary
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pub fn update(self: *@This()) void {
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const nds9_tbl = @constCast(self.nds9_table);
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const nds7_tbl = @constCast(self.nds7_table);
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@ -445,10 +409,11 @@ pub const Vram = struct {
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else => cnt.offset.read(),
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};
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const rnge = range(kind, cnt.mst.read(), ofs);
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const min = range(kind, cnt.mst.read(), ofs);
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const max = min + kind.size();
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const offset = addr & (kind.size() - 1);
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if (rnge.min <= addr and addr < rnge.max) {
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if (min <= addr and addr < max) {
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if ((kind == .c or kind == .d) and cnt.mst.read() == 2) {
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// Allocate to ARM7
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nds7_ptr.* = self._buf[buf_offset(kind) + offset ..].ptr;
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