basic physical memory page allocator

Signed-off-by: Matthew Wozniak <me@woz.blue>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..7896a09
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,39 @@
+const uart = @import("uart.zig");
+const mem = @import("mem.zig");
+const std = @import("std");
+
+fn logFn(
+    comptime message_level: std.log.Level,
+    comptime scope: @EnumLiteral(),
+    comptime format: []const u8,
+    args: anytype,
+) void {
+    return std.log.defaultLogFileTerminal(
+        message_level,
+        scope,
+        format,
+        args,
+        uart.terminal,
+    ) catch {};
+}
+
+pub const std_options: std.Options = .{
+    .logFn = logFn,
+    .page_size_max = 4096,
+    .page_size_min = 4096,
+};
+
+pub const panic = std.debug.FullPanic(panicFn);
+
+fn panicFn(msg: []const u8, first_trace_addr: ?usize) noreturn {
+    std.log.err("kernel panic at {?}", .{first_trace_addr});
+    std.log.err("{s}", .{msg});
+    while (true) {}
+}
+
+export fn kmain() callconv(.c) noreturn {
+    uart.init(0x1000_0000);
+    std.log.info("hello, world", .{});
+    mem.init();
+    while (true) {}
+}