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feat(timer): implemeant all timer i/o reads

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-29 01:37:28 -03:00
parent 268961262d
commit c831f67d1a
1 changed files with 13 additions and 1 deletions
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14
src/core/bus/timer.zig
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@ -8,6 +8,8 @@ const Arm7tdmi = @import("../cpu.zig").Arm7tdmi;
pub const TimerTuple = std.meta.Tuple(&[_]type{ Timer(0), Timer(1), Timer(2), Timer(3) }); pub const TimerTuple = std.meta.Tuple(&[_]type{ Timer(0), Timer(1), Timer(2), Timer(3) });
const log = std.log.scoped(.Timer); const log = std.log.scoped(.Timer);
const shift = util.shift;
pub fn create(sched: *Scheduler) TimerTuple { pub fn create(sched: *Scheduler) TimerTuple {
return .{ Timer(0).init(sched), Timer(1).init(sched), Timer(2).init(sched), Timer(3).init(sched) }; return .{ Timer(0).init(sched), Timer(1).init(sched), Timer(2).init(sched), Timer(3).init(sched) };
} }
@ -34,7 +36,17 @@ pub fn read(comptime T: type, tim: *const TimerTuple, addr: u32) ?T {
0xE => tim.*[3].cnt.raw, 0xE => tim.*[3].cnt.raw,
else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }), else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }),
}, },
u8 => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }), u8 => switch (nybble) {
0x0, 0x1 => @truncate(T, tim.*[0].timcntL() >> shift(nybble)),
0x2, 0x3 => @truncate(T, tim.*[0].cnt.raw >> shift(nybble)),
0x4, 0x5 => @truncate(T, tim.*[1].timcntL() >> shift(nybble)),
0x6, 0x7 => @truncate(T, tim.*[1].cnt.raw >> shift(nybble)),
0x8, 0x9 => @truncate(T, tim.*[2].timcntL() >> shift(nybble)),
0xA, 0xB => @truncate(T, tim.*[2].cnt.raw >> shift(nybble)),
0xC, 0xD => @truncate(T, tim.*[3].timcntL() >> shift(nybble)),
0xE, 0xF => @truncate(T, tim.*[3].cnt.raw >> shift(nybble)),
else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }),
},
else => @compileError("TIM: Unsupported read width"), else => @compileError("TIM: Unsupported read width"),
}; };
} }