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chore: rewrite read/write methods for remainig Bus devices

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-04-08 01:18:58 -03:00
parent 5310c12669
commit aac01b0bfe
7 changed files with 176 additions and 163 deletions
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28
src/bus/Bios.zig
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@@ -26,23 +26,15 @@ pub fn deinit(self: Self) void {
if (self.buf) |buf| self.alloc.free(buf);
}
pub fn get32(self: *const Self, idx: usize) u32 {
if (self.buf) |buf|
return (@as(u32, buf[idx + 3]) << 24) | (@as(u32, buf[idx + 2]) << 16) | (@as(u32, buf[idx + 1]) << 8) | (@as(u32, buf[idx]));
pub fn read(self: *const Self, comptime T: type, addr: usize) T {
if (self.buf) |buf| {
return switch (T) {
u32 => (@as(u32, buf[addr + 3]) << 24) | (@as(u32, buf[addr + 2]) << 16) | (@as(u32, buf[addr + 1]) << 8) | (@as(u32, buf[addr])),
u16 => (@as(u16, buf[addr + 1]) << 8) | @as(u16, buf[addr]),
u8 => buf[addr],
else => @compileError("BIOS: Unsupported read width"),
};
}
std.debug.panic("[CPU/BIOS:32] ZBA tried to read from 0x{X:0>8} but no BIOS was provided.", .{idx});
}
pub fn get16(self: *const Self, idx: usize) u16 {
if (self.buf) |buf|
return (@as(u16, buf[idx + 1]) << 8) | @as(u16, buf[idx]);
std.debug.panic("[CPU/BIOS:16] ZBA tried to read from 0x{X:0>8} but no BIOS was provided.", .{idx});
}
pub fn get8(self: *const Self, idx: usize) u8 {
if (self.buf) |buf|
return buf[idx];
std.debug.panic("[CPU/BIOS:8] ZBA tried to read from 0x{X:0>8} but no BIOS was provided.", .{idx});
std.debug.panic("[BIOS] ZBA tried to read {} from 0x{X:0>8} but not BIOS was present", .{ T, addr });
}