refactor: move directories around a bit

src/arch/amd64/root.zig

@@ -0,0 +1,2 @@
+pub const cpu = @import("cpu.zig");
+pub const name = "amd64";

src/arch/um/root.zig

@@ -0,0 +1 @@
+pub const name = "um";

src/kern/amd64/impl.zig

@@ -1,7 +1,7 @@
 const b = @import("base");
 const ke = b.ke;
 const pl = b.pl;
-const amd64 = pl.impl;
+const amd64 = b.arch;
 
 const std = @import("std");
 

src/kern/init.zig

@@ -2,6 +2,7 @@ const std = @import("std");
 const b = @import("base");
 const pl = b.pl;
 const ke = b.ke;
+const arch = b.arch;
 const ki = ke.private;
 const ex = b.ex;
 
@@ -17,7 +18,7 @@ pub fn init(boot_info: *pl.BootInfo) linksection(b.init) void {
     thread0.priority = 0;
     thread0.priority_class = .Idle;
 
-    std.log.info("Zag for {s}, cmdline is \"{?s}\"", .{ pl.name, boot_info.cmdline });
+    std.log.info("Zag for {s} ({s}), cmdline is \"{?s}\"", .{ pl.name, arch.name, boot_info.cmdline });
 
     ex.private.init(boot_info);
 }

src/platform/pc/impl.zig

@@ -1,9 +1,11 @@
 const b = @import("base");
-pub const cpu = @import("cpu.zig");
-const ki = b.ke.private;
+const amd64 = b.arch;
 const std = @import("std");
 
-pub const name = "amd64";
+const ki = b.ke.private;
+const cpu = amd64.cpu;
+
+pub const name = "PC";
 
 const com1 = 0x3F8;
 

src/platform/root.zig

@@ -4,7 +4,7 @@
 const config = @import("config");
 
 pub const impl = if (@hasDecl(config, "CONFIG_ARCH_AMD64"))
-    @import("amd64/impl.zig")
+    @import("pc/impl.zig")
 else if (@hasDecl(config, "CONFIG_ARCH_UM"))
     @import("um/impl.zig")
 else

src/root.zig

@@ -4,6 +4,7 @@ pub const ex = @import("ex/root.zig");
 pub const pl = @import("platform/root.zig");
 pub const rtl = @import("rtl");
 pub const ksyms = @import("ksyms");
+pub const arch = @import("arch");
 
 pub const init = ".text.init";
 pub const percpu_init = ".percpu_init_array";