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// SPDX-FileCopyrightText: 2024 Himbeer <himbeer@disroot.org>
//
// SPDX-License-Identifier: AGPL-3.0-or-later
const std = @import("std");
const riscv = @import("../riscv.zig");
const sbi = @import("../sbi.zig");
const ExtId = enum(usize) {
SetTimer,
ConsolePutchar,
ConsoleGetchar,
ClearIpi,
SendIpi,
RemoteFenceI,
RemoteSFenceVma,
RemoteSFenceVmaAsid,
Shutdown,
};
pub const Writer = std.io.Writer(void, sbi.Error, write);
fn write(_: void, bytes: []const u8) !usize {
for (bytes) |byte| {
const ret = riscv.ecall(@intFromEnum(ExtId.ConsolePutchar), 0, byte, 0, 0);
if (ret.err != 0) {
return sbi.errorFromCode(ret.err);
}
}
return bytes.len;
}
pub fn writer() !Writer {
if (!try sbi.probeExt(@intFromEnum(ExtId.ConsolePutchar))) {
return sbi.Error.NotSupported;
}
return .{ .context = {} };
}
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