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tmp: clean up nds7/nds9 io for a bit

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This commit is contained in:
Rekai Nyangadzayi Musuka
2023-09-15 19:36:58 -05:00
parent 6518fcc68b
commit 78eea74515
2 changed files with 63 additions and 65 deletions
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51
src/core/nds7/io.zig
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@@ -20,21 +20,19 @@ pub const Io = struct {
pub fn read(bus: *const Bus, comptime T: type, address: u32) T {
return switch (T) {
// zig fmt: off
u32 =>
@as(T, read(bus, u8, address + 3)) << 24
| @as(T, read(bus, u8, address + 2)) << 16
| @as(T, read(bus, u8, address + 1)) << 8
| read(bus, u8, address + 0) << 0,
// zig fmt: on
u16 => @as(T, read(bus, u8, address + 1)) << 8 | read(bus, u8, address),
u32 => switch (address) {
0x0400_0208 => @intFromBool(bus.io.shared.ime),
0x0400_0210 => bus.io.shared.ie,
0x0400_0214 => bus.io.shared.irq,
else => warn("unexpected: read(T: {}, addr: 0x{X:0>8}) {} ", .{ T, address, T }),
},
u16 => switch (address) {
0x0400_0180 => @truncate(bus.io.shared.ipc_sync.raw),
0x0400_0184 => @truncate(bus.io.shared.ipc_fifo_cnt.raw),
else => warn("unexpected: read(T: {}, addr: 0x{X:0>8}) {} ", .{ T, address, T }),
},
u8 => switch (address) {
0x0400_0180...0x0400_0183 => valueAtAddressOffset(u32, address, bus.io.shared.ipc_sync.raw),
0x0400_0184...0x0400_0187 => valueAtAddressOffset(u32, address, bus.io.shared.ipc_fifo_cnt.raw),
0x0400_0208...0x0400_020B => valueAtAddressOffset(u32, address, @intFromBool(bus.io.shared.ime)),
else => warn("unexpected read: 0x{X:0>8}", .{address}),
else => warn("unexpected: read(T: {}, addr: 0x{X:0>8}) {} ", .{ T, address, T }),
},
else => @compileError(T ++ " is an unsupported bus read type"),
};
@@ -42,24 +40,19 @@ pub fn read(bus: *const Bus, comptime T: type, address: u32) T {
pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
switch (T) {
u32 => {
write(bus, u8, address + 3, @as(u8, @truncate(value >> 24)));
write(bus, u8, address + 2, @as(u8, @truncate(value >> 16)));
write(bus, u8, address + 1, @as(u8, @truncate(value >> 8)));
write(bus, u8, address + 0, @as(u8, @truncate(value >> 0)));
u32 => switch (address) {
0x0400_0208 => bus.io.shared.ime = value & 1 == 1,
0x0400_0210 => bus.io.shared.ie = value,
0x0400_0214 => bus.io.shared.irq = value,
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
u16 => {
write(bus, u8, address + 1, @as(u8, @truncate(value >> 8)));
write(bus, u8, address + 0, @as(u8, @truncate(value >> 0)));
u16 => switch (address) {
0x0400_0180 => bus.io.shared.ipc_sync.raw = value,
0x0400_0184 => bus.io.shared.ipc_fifo_cnt.raw = value,
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
u8 => switch (address) {
0x0400_0180...0x0400_0183 => writeToAddressOffset(&bus.io.shared.ipc_sync.raw, address, value),
0x0400_0184...0x0400_0187 => writeToAddressOffset(&bus.io.shared.ipc_fifo_cnt.raw, address, value),
0x0400_0208 => bus.io.shared.ime = value & 1 == 1,
0x0400_0209...0x0400_020B => {}, // unused bytes from IME
else => log.warn("unexpected write: 0x{X:}u8 -> 0x{X:0>8}", .{ value, address }),
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
else => @compileError(T ++ " is an unsupported bus write type"),
}