zig-riscv-embedded

 1// Copyright © 2020-2021 Sören Tempel
 2//
 3// This program is free software: you can redistribute it and/or modify
 4// it under the terms of the GNU Affero General Public License as
 5// published by the Free Software Foundation, either version 3 of the
 6// License, or (at your option) any later version.
 7//
 8// This program is distributed in the hope that it will be useful, but
 9// WITHOUT ANY WARRANTY; without even the implied warranty of
10// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11// Affero General Public License for more details.
12//
13// You should have received a copy of the GNU Affero General Public License
14// along with this program. If not, see <https://www.gnu.org/licenses/>.
15
16const std = @import("std");
17const Target = std.Target;
18const Zig = std.zig;
19const FileSource = std.build.FileSource;
20const Builder = std.build.Builder;
21const FeatureSet = std.Target.Cpu.Feature.Set;
22
23pub fn build(b: *Builder) void {
24    var fe310_cpu_feat = FeatureSet.empty;
25    const m: std.Target.riscv.Feature = .m;
26    const a: std.Target.riscv.Feature = .a;
27    const c: std.Target.riscv.Feature = .c;
28    fe310_cpu_feat.addFeature(@enumToInt(a));
29    fe310_cpu_feat.addFeature(@enumToInt(m));
30    fe310_cpu_feat.addFeature(@enumToInt(c));
31
32    const target = Zig.CrossTarget{
33        .cpu_arch = Target.Cpu.Arch.riscv32,
34        .os_tag = Target.Os.Tag.freestanding,
35        .abi = Target.Abi.none,
36        .cpu_features_sub = std.Target.riscv.cpu.baseline_rv32.features,
37        .cpu_features_add = fe310_cpu_feat,
38    };
39
40    const mode = b.standardReleaseOptions();
41
42    const exe = b.addExecutable("main", "src/init.zig");
43    exe.setLinkerScriptPath(FileSource{ .path = "fe310_g000.ld" });
44    exe.setTarget(target);
45    exe.setBuildMode(mode);
46
47    exe.addCSourceFile("src/start.S", &[_][]const u8{});
48    exe.addCSourceFile("src/irq.S", &[_][]const u8{});
49    exe.addCSourceFile("src/clock.c", &[_][]const u8{});
50
51    exe.addPackage(std.build.Pkg{
52        .name = "zoap",
53        .path = FileSource{ .path = "./zoap/src/zoap.zig" },
54    });
55
56    b.default_step.dependOn(&exe.step);
57    b.installArtifact(exe);
58}