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chore(io): abstract away io masks

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This commit is contained in:
Rekai Nyangadzayi Musuka
2023-09-19 19:08:33 -05:00
parent 5dbd681ba1
commit bc5597c73e
3 changed files with 35 additions and 25 deletions
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27
src/core/io.zig
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@@ -204,6 +204,33 @@ const IpcFifoCnt = extern union {
raw: u32,
};
pub const masks = struct {
const Bus9 = @import("nds9/Bus.zig");
const Bus7 = @import("nds7/Bus.zig");
pub inline fn ipcFifoSync(bus: anytype, value: anytype) @TypeOf(value) {
comptime verifyBusType(@TypeOf(bus));
const T = @TypeOf(value);
const mask: T = 0xF;
return value & ~mask | @as(T, @intCast(bus.io.shared.ipc_fifo.sync.raw & mask));
}
pub inline fn ipcFifoCnt(bus: anytype, value: anytype) @TypeOf(value) {
comptime verifyBusType(@TypeOf(bus));
const T = @TypeOf(value);
const mask: T = 0x0303;
return value & ~mask | @as(T, @intCast(bus.io.shared.ipc_fifo.cnt.raw & mask));
}
fn verifyBusType(comptime BusT: type) void {
std.debug.assert(@typeInfo(BusT) == .Pointer);
std.debug.assert(@typeInfo(BusT).Pointer.size == .One);
std.debug.assert(@typeInfo(BusT).Pointer.child == Bus9 or @typeInfo(BusT).Pointer.child == Bus7);
}
};
pub const nds7 = struct {
pub const IntEnable = extern union {
raw: u32,

12
src/core/nds7/io.zig
View File

@@ -5,8 +5,7 @@ const Bit = @import("bitfield").Bit;
const Bus = @import("Bus.zig");
const SharedIo = @import("../io.zig").Io;
const writeToAddressOffset = @import("../io.zig").writeToAddressOffset;
const valueAtAddressOffset = @import("../io.zig").valueAtAddressOffset;
const masks = @import("../io.zig").masks;
const log = std.log.scoped(.nds7_io);
@@ -51,13 +50,8 @@ pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
u16 => switch (address) {
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = blk: {
const ret = value & ~@as(u16, 0xF) | (bus.io.shared.ipc_fifo.sync.raw & 0xF);
log.debug("IPCFIFOSYNC <- 0x{X:0>8}", .{ret});
break :blk ret;
},
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = value,
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = masks.ipcFifoSync(bus, value),
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = masks.ipcFifoCnt(bus, value),
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
u8 => switch (address) {

21
src/core/nds9/io.zig
View File

@@ -5,8 +5,7 @@ const Bit = @import("bitfield").Bit;
const Bus = @import("Bus.zig");
const SharedIo = @import("../io.zig").Io;
const writeToAddressOffset = @import("../io.zig").writeToAddressOffset;
const valueAtAddressOffset = @import("../io.zig").valueAtAddressOffset;
const masks = @import("../io.zig").masks;
const log = std.log.scoped(.nds9_io);
@@ -54,13 +53,8 @@ pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
switch (T) {
u32 => switch (address) {
0x0400_0000 => bus.ppu.io.dispcnt_a.raw = value,
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = blk: {
const ret = value & ~@as(u32, 0xF) | (bus.io.shared.ipc_fifo.sync.raw & 0xF);
log.debug("IPCFIFOSYNC <- 0x{X:0>8}", .{ret});
break :blk ret;
},
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = value,
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = masks.ipcFifoSync(bus, value),
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = masks.ipcFifoCnt(bus, value),
0x0400_0188 => bus.io.shared.ipc_fifo.send(.arm9, value) catch |e| std.debug.panic("IPC FIFO Error: {}", .{e}),
0x0400_0240 => {
@@ -79,13 +73,8 @@ pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),
},
u16 => switch (address) {
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = blk: {
const ret = value & ~@as(u16, 0xF) | (bus.io.shared.ipc_fifo.sync.raw & 0xF);
log.debug("IPCFIFOSYNC <- 0x{X:0>8}", .{ret});
break :blk ret;
},
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = value,
0x0400_0180 => bus.io.shared.ipc_fifo.sync.raw = masks.ipcFifoSync(bus, value),
0x0400_0184 => bus.io.shared.ipc_fifo.cnt.raw = masks.ipcFifoCnt(bus, value),
0x0400_0208 => bus.io.shared.ime = value & 1 == 1,
else => log.warn("unexpected: write(T: {}, addr: 0x{X:0>8}, value: 0x{X:0>8})", .{ T, address, value }),