41 lines
1008 B
Zig
41 lines
1008 B
Zig
const std = @import("std");
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const Allocator = std.mem.Allocator;
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const ewram_size = 0x40000;
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const Self = @This();
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buf: []u8,
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alloc: Allocator,
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pub fn init(alloc: Allocator) !Self {
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const buf = try alloc.alloc(u8, ewram_size);
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std.mem.set(u8, buf, 0);
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return Self{
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.buf = buf,
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.alloc = alloc,
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};
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}
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pub fn deinit(self: Self) void {
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self.alloc.free(self.buf);
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}
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pub fn read(self: *const Self, comptime T: type, address: usize) T {
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const addr = address & 0x3FFFF;
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return switch (T) {
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u32, u16, u8 => std.mem.readIntSliceLittle(T, self.buf[addr..][0..@sizeOf(T)]),
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else => @compileError("EWRAM: Unsupported read width"),
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};
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}
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pub fn write(self: *const Self, comptime T: type, address: usize, value: T) void {
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const addr = address & 0x3FFFF;
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return switch (T) {
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u32, u16, u8 => std.mem.writeIntSliceLittle(T, self.buf[addr..][0..@sizeOf(T)], value),
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else => @compileError("EWRAM: Unsupported write width"),
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};
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}
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