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// SPDX-FileCopyrightText: 2024 Himbeer <himbeer@disroot.org>
//
// SPDX-License-Identifier: AGPL-3.0-or-later
const riscv = @import("riscv.zig");
pub const Error = error{
Success,
Failed,
NotSupported,
InvalidParam,
Denied,
InvalidAddr,
AlreadyAvail,
AlreadyStarted,
AlreadyStopped,
NoSharedMem,
InvalidState,
BadRange,
SbiUnknown,
};
pub fn errorFromCode(code: isize) Error {
return switch (code) {
0 => Error.Success,
-1 => Error.Failed,
-2 => Error.NotSupported,
-3 => Error.InvalidParam,
-4 => Error.Denied,
-5 => Error.InvalidAddr,
-6 => Error.AlreadyAvail,
-7 => Error.AlreadyStarted,
-8 => Error.AlreadyStopped,
-9 => Error.NoSharedMem,
-10 => Error.InvalidState,
-11 => Error.BadRange,
else => Error.SbiUnknown,
};
}
const BaseExtId: usize = 0x10;
const BaseFnId = enum(usize) {
GetSpecVer,
GetImpId,
GetImpVer,
ProbeExt,
GetMVendorId,
GetMArchId,
GetMImpId,
};
pub const ImpId = enum(isize) {
Bbl,
OpenSbi,
Xvisor,
Kvm,
RustSbi,
Diosix,
Coffer,
Xen,
PolarFire,
_,
};
pub fn specVer() !isize {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetSpecVer), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val;
}
pub fn impId() !ImpId {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetImpId), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return @enumFromInt(ret.val);
}
pub fn impVer() !isize {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetImpVer), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val;
}
pub fn probeExt(ext_id: usize) !bool {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.ProbeExt), ext_id, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val != 0;
}
pub fn mVendorId() !isize {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetMVendorId), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val;
}
pub fn mArchId() !isize {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetMarchId), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val;
}
pub fn mImpId() !isize {
const ret = riscv.ecall(BaseExtId, @intFromEnum(BaseFnId.GetMImpId), 0, 0, 0);
if (ret.err != 0) {
return errorFromCode(ret.err);
}
return ret.val;
}
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