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paoda:ppu
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compare: paoda:0732fd26aa668b40df4b61fdfa7dd4c44d6080f7
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paoda:main
paoda:ppu

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Author SHA1 Message Date
Rekai Nyangadzayi Musuka 0732fd26aa feat: implement IPCFIFO IRQs 
turbo now passes rockwrestler!!!
 2023-10-09 13:14:05 -05:00
2 changed files with 60 additions and 13 deletions
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2
src/core/emu.zig
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@ -82,6 +82,8 @@ pub fn loadFirm(allocator: Allocator, system: System, firm_path: []const u8) !vo
const path = try std.mem.join(allocator, "/", &.{ firm_path, "bios9.bin" });
defer allocator.free(path);
log.debug("bios9 path: {s}", .{path});
const file = try std.fs.cwd().openFile(path, .{});
defer file.close();

71
src/core/io.zig
View File

@ -7,10 +7,6 @@ const handleInterrupt = @import("emu.zig").handleInterrupt;
const log = std.log.scoped(.shared_io);
// FIXME: This whole thing is bad bad bad bad bad
// I think only the IPC stuff needs to be here, since they talk to each other.
// every other "shared I/O register" is just duplicated on both CPUs. So they shouldn't be here
pub const Io = struct {
/// Inter Process Communication FIFO
ipc: Ipc = .{},
@ -77,11 +73,11 @@ const Ipc = struct {
if (value >> 3 & 1 == 1) {
self._nds7.fifo.reset();
self._nds7.cnt.send_fifo_empty.write(true);
self._nds9.cnt.recv_fifo_empty.write(true);
self._nds7.cnt.send_fifo_empty.set();
self._nds9.cnt.recv_fifo_empty.set();
self._nds7.cnt.send_fifo_full.write(false);
self._nds9.cnt.recv_fifo_full.write(false);
self._nds7.cnt.send_fifo_full.unset();
self._nds9.cnt.recv_fifo_full.unset();
}
},
.nds9 => {
@ -98,11 +94,11 @@ const Ipc = struct {
if (value >> 3 & 1 == 1) {
self._nds9.fifo.reset();
self._nds9.cnt.send_fifo_empty.write(true);
self._nds7.cnt.recv_fifo_empty.write(true);
self._nds9.cnt.send_fifo_empty.set();
self._nds7.cnt.recv_fifo_empty.set();
self._nds9.cnt.send_fifo_full.write(false);
self._nds7.cnt.recv_fifo_full.write(false);
self._nds9.cnt.send_fifo_full.unset();
self._nds7.cnt.recv_fifo_full.unset();
}
},
}
@ -125,23 +121,49 @@ const Ipc = struct {
if (!self._nds7.cnt.enable_fifos.read()) return;
try self._nds7.fifo.push(value);
const not_empty_cache = !self._nds9.cnt.recv_fifo_empty.read();
// update status bits
self._nds7.cnt.send_fifo_empty.write(self._nds7.fifo._len() == 0);
self._nds9.cnt.recv_fifo_empty.write(self._nds7.fifo._len() == 0);
self._nds7.cnt.send_fifo_full.write(self._nds7.fifo._len() == 0x10);
self._nds9.cnt.recv_fifo_full.write(self._nds7.fifo._len() == 0x10);
const not_empty = !self._nds9.cnt.recv_fifo_empty.read();
if (self._nds9.cnt.recv_fifo_irq_enable.read() and !not_empty_cache and not_empty) {
// NDS7 Send | NDS9 RECV (Handling Not Empty)
const bus: *System.Bus9 = @ptrCast(@alignCast(self.arm946es.?.bus.ptr));
bus.io.irq.ipc_recv_not_empty.set();
handleInterrupt(.nds9, self.arm946es.?);
}
},
.nds9 => {
if (!self._nds9.cnt.enable_fifos.read()) return;
try self._nds9.fifo.push(value);
const not_empty_cache = !self._nds7.cnt.recv_fifo_empty.read();
// update status bits
self._nds9.cnt.send_fifo_empty.write(self._nds9.fifo._len() == 0);
self._nds7.cnt.recv_fifo_empty.write(self._nds9.fifo._len() == 0);
self._nds9.cnt.send_fifo_full.write(self._nds9.fifo._len() == 0x10);
self._nds7.cnt.recv_fifo_full.write(self._nds9.fifo._len() == 0x10);
const not_empty = !self._nds7.cnt.recv_fifo_empty.read();
if (self._nds7.cnt.recv_fifo_irq_enable.read() and !not_empty_cache and not_empty) {
// NDS9 Send | NDS7 RECV (Handling Not Empty)
const bus: *System.Bus7 = @ptrCast(@alignCast(self.arm7tdmi.?.bus.ptr));
bus.io.irq.ipc_recv_not_empty.set();
handleInterrupt(.nds7, self.arm7tdmi.?);
}
},
}
}
@ -162,6 +184,8 @@ const Ipc = struct {
break :blk self._nds7.last_read orelse 0x0000_0000;
};
const empty_cache = self._nds9.cnt.send_fifo_empty.read();
// update status bits
self._nds7.cnt.recv_fifo_empty.write(self._nds9.fifo._len() == 0);
self._nds9.cnt.send_fifo_empty.write(self._nds9.fifo._len() == 0);
@ -169,6 +193,15 @@ const Ipc = struct {
self._nds7.cnt.recv_fifo_full.write(self._nds9.fifo._len() == 0x10);
self._nds9.cnt.send_fifo_full.write(self._nds9.fifo._len() == 0x10);
const empty = self._nds9.cnt.send_fifo_empty.read();
if (self._nds9.cnt.send_fifo_irq_enable.read() and (!empty_cache and empty)) {
const bus: *System.Bus9 = @ptrCast(@alignCast(self.arm946es.?.bus.ptr));
bus.io.irq.ipc_send_empty.set();
handleInterrupt(.nds9, self.arm946es.?);
}
return value;
},
.nds9 => {
@ -183,6 +216,8 @@ const Ipc = struct {
break :blk self._nds7.last_read orelse 0x0000_0000;
};
const empty_cache = self._nds7.cnt.send_fifo_empty.read();
// update status bits
self._nds9.cnt.recv_fifo_empty.write(self._nds7.fifo._len() == 0);
self._nds7.cnt.send_fifo_empty.write(self._nds7.fifo._len() == 0);
@ -190,6 +225,15 @@ const Ipc = struct {
self._nds9.cnt.recv_fifo_full.write(self._nds7.fifo._len() == 0x10);
self._nds7.cnt.send_fifo_full.write(self._nds7.fifo._len() == 0x10);
const empty = self._nds7.cnt.send_fifo_empty.read();
if (self._nds7.cnt.send_fifo_irq_enable.read() and (!empty_cache and empty)) {
const bus: *System.Bus7 = @ptrCast(@alignCast(self.arm7tdmi.?.bus.ptr));
bus.io.irq.ipc_send_empty.set();
handleInterrupt(.nds7, self.arm7tdmi.?);
}
return value;
},
}
@ -263,7 +307,6 @@ pub const masks = struct {
const err_mask: u32 = 0x4000; // bit 14
const err_bit = (cnt & err_mask) & ~(value & err_mask);
if (value & 0b1000 != 0) log.err("TODO: handle IPCFIFOCNT.3", .{});
const without_err = (@as(u32, value) & _mask) | (cnt & ~_mask);
return (without_err & ~err_mask) | err_bit;
@ -278,6 +321,8 @@ pub const masks = struct {
// FIXME: bitfields depends on NDS9 / NDS7
pub const IntEnable = extern union {
ipcsync: Bit(u32, 16),
ipc_send_empty: Bit(u32, 17),
ipc_recv_not_empty: Bit(u32, 18),
raw: u32,
};