all: use root boot info pointer

src/ex/init.zig

@@ -13,10 +13,10 @@ const fbconsole = @import("../dev/fbconsole.zig");
 
 export fn kmain(boot_info: *r.BootInfo) callconv(.c) void {
     ke.init(boot_info);
-    mm.init(boot_info);
+    mm.init();
     ps.init();
 
-    pl.late_init(boot_info);
+    pl.late_init();
     mm.late_init();
     ke.sched.late_init();
     exp.workqueue.init() catch @panic("e");

src/kern/init.zig

@@ -11,12 +11,11 @@ var stack: [r.kib(16)]u8 align(16) = undefined;
 
 pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
     r.boot_info = boot_info;
-
     ke.ncpus = 1;
     ki.impl.early_init();
-    ki.tunable.init(boot_info);
+    ki.tunable.init();
     std.log.info("Welcome to the machine", .{});
-    pl.early_init(boot_info);
+    pl.early_init();
     ki.log.init();
     ki.cpu.init_cpu(0);
     ki.turnstile.init_turnstiles();

src/kern/tunable.zig

@@ -42,8 +42,8 @@ pub fn Tunable(comptime T: type, comptime default: T, comptime name: []const u8)
     };
 }
 
-pub fn init(boot_info: *r.BootInfo) void {
+pub fn init() void {
-    const cmdline = boot_info.cmdline orelse return;
+    const cmdline = r.boot_info.cmdline orelse return;
 
     const elems = set.elems();
 

src/mm/init.zig

@@ -4,8 +4,8 @@ const mm = r.mm;
 const mi = mm.private;
 const config = @import("config");
 
-pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
+pub fn init() linksection(r.init) void {
-    mi.phys.init(boot_info);
+    mi.phys.init();
     mi.zone.early_init();
     mi.vmem.init();
     mi.heap.init();

src/mm/phys.zig

@@ -139,16 +139,16 @@ pub fn free_batch(head: *mm.Page, tail: *mm.Page, count: usize) void {
     list_lock.release(ipl);
 }
 
-pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
+pub fn init() linksection(r.init) void {
-    memory_map = &boot_info.memory_map;
+    memory_map = &r.boot_info.memory_map;
     free_list.init();
     free_page_event.init(.Notification);
 
-    var total_usable_memory: usize = boot_info.memory_map.loader_memory_used;
+    var total_usable_memory: usize = memory_map.loader_memory_used;
     log.info("physical memory map:", .{});
 
-    for (0..boot_info.memory_map.entry_count) |i| {
+    for (0..memory_map.entry_count) |i| {
-        const entry = boot_info.memory_map.entries[i];
+        const entry = memory_map.entries[i];
 
         log.info("[{x:0>16}-{x:0>16}] {s}", .{ entry.base, entry.base + entry.size, @tagName(entry.type) });
 
@@ -157,7 +157,9 @@ pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
         }
     }
 
-    const pfndb_size_required = @sizeOf(mm.Page) * (std.math.divCeil(usize, total_usable_memory, mm.page_size) catch unreachable);
+    const pfndb_size_required = @sizeOf(mm.Page) *
+        (std.math.divCeil(usize, total_usable_memory, mm.page_size) catch unreachable);
+
     log.info("using {} KiB for pfndb ({} bytes per page)", .{ pfndb_size_required / 1024, @sizeOf(mm.Page) });
 
     // Get the kernel pagemap from the loader,
@@ -168,7 +170,12 @@ pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
     // this formula is from Linux and does not grow linearly; it would be wasteful
     // to take a fixed percentage of memory from a large server.
     // We clamp this between 128 KiB and 256 MiB.
-    const min_free_kb = std.math.clamp(std.math.sqrt((usable_memory.load(.monotonic) / 1024) * 16), 128, 256 * 1024);
+    const min_free_kb = std.math.clamp(
+        std.math.sqrt((usable_memory.load(.monotonic) / 1024) * 16),
+        128,
+        256 * 1024,
+    );
+
     min_memory_threshold = min_free_kb / 4;
 
     const total_usable_pages = total_usable_memory / mm.page_size;

src/platform/acpi/root.zig

@@ -322,8 +322,8 @@ fn enumerate_tables() void {
     }
 }
 
-pub fn init(boot_info: *r.BootInfo) linksection(r.init) void {
+pub fn init() linksection(r.init) void {
-    const rsdp_addr = boot_info.rsdp orelse return;
+    const rsdp_addr = r.boot_info.rsdp orelse return;
 
     const rsdp: *Rsdp = @ptrFromInt(rsdp_addr);
 

src/platform/pc/impl.zig

@@ -32,7 +32,7 @@ fn com1_write(c: u8) void {
     amd64.outb(com1, c);
 }
 
-pub fn early_init(boot_info: *r.BootInfo) linksection(r.init) void {
+pub fn early_init() linksection(r.init) void {
     com1_init();
 
     const f = amd64.cpu_features;
@@ -58,7 +58,6 @@ pub fn early_init(boot_info: *r.BootInfo) linksection(r.init) void {
     if (amd64.hypervisor.info) |h| {
         log.info("running on hypervisor {s}", .{@tagName(h.vendor)});
     }
-    _ = boot_info;
 }
 
 fn init_hypervisor(hv: amd64.hypervisor.Info) void {
@@ -79,12 +78,12 @@ pub fn init_ap() void {
     apic.init_local();
 }
 
-pub fn late_init(boot_info: *r.BootInfo) linksection(r.init) void {
+pub fn late_init() linksection(r.init) void {
     if (amd64.hypervisor.info) |hv| {
         init_hypervisor(hv);
     }
 
-    pl.acpi.init(boot_info);
+    pl.acpi.init();
 
     tsc.init();
 

src/platform/root.zig

@@ -12,14 +12,14 @@ pub const impl = switch (config.arch) {
 pub const acpi = @import("acpi/root.zig");
 
 /// Early platform-specific initialization, called before anything else.
-pub inline fn early_init(boot_info: *r.BootInfo) void {
+pub inline fn early_init() void {
-    return impl.early_init(boot_info);
+    return impl.early_init();
 }
 
 /// Late platform init. Memory allocator is available at this point.
 /// SMP bringup must be done after this returns.
-pub inline fn late_init(boot_info: *r.BootInfo) void {
+pub inline fn late_init() void {
-    return impl.late_init(boot_info);
+    return impl.late_init();
 }
 
 /// Write a single character to the debug console.