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feat(um): implement mm for um

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Loïc Grégoire
2026-04-15 22:20:23 -04:00
parent 8ea47b72f8
commit deab6561b9
6 changed files with 160 additions and 79 deletions
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src/platform/um/impl.zig
+7 -12
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@@ -48,8 +48,8 @@ pub fn debug_write(char: u8) void {
pub const arm_timer = timer.arm_timer;
fn check_function(fn_name: []const u8, ret: usize) void {
const real_ret: i64 = @intCast(ret);
pub fn check_function(fn_name: []const u8, ret: usize) void {
const real_ret: isize = @bitCast(ret);
if (real_ret < 0) {
const errno_val = linux.errno(ret);
@@ -59,14 +59,9 @@ fn check_function(fn_name: []const u8, ret: usize) void {
}
}
const bootstrap_offsets = [1]usize{0};
pub var cpu_offsets: []usize = undefined;
pub fn early_init() linksection(b.init) void {
// Ensure we can use per-cpu data.
cpu_offsets = @constCast(&bootstrap_offsets);
pub fn early_init(_: *pl.BootInfo) linksection(b.init) void {
percpu.local().pthread = c.pthread_self();
my_cpu_id = 0;
@@ -74,13 +69,13 @@ pub fn early_init() linksection(b.init) void {
check_function("ftruncate", linux.ftruncate(memfd, @intCast(global_state.params.mem_size)));
const phys_base = linux.mmap(null, global_state.params.mem_size, .{ .READ = true, .WRITE = true }, .{ .ANONYMOUS = true, .TYPE = .SHARED }, memfd, 0);
const phys_base = linux.mmap(null, global_state.params.mem_size, .{ .READ = true, .WRITE = true }, .{ .TYPE = .SHARED }, memfd, 0);
check_function("mmap", phys_base);
// Build memory map
global_state.boot_info.memory_map.entry_count = 1;
global_state.boot_info.memory_map.entries[0].base = phys_base;
global_state.boot_info.memory_map.entries[0].base = 0;
global_state.boot_info.memory_map.entries[0].size = global_state.params.mem_size;
global_state.boot_info.memory_map.entries[0].type = .Free;
@@ -123,7 +118,7 @@ fn other_cpu_entry(_: ?*anyopaque) callconv(.c) ?*anyopaque {
percpu.local().pthread = c.pthread_self();
ki.cpu.init_cpu();
ki.cpu.init_cpu(@intCast(my_cpu_id));
timer.init_cpu();
@@ -139,7 +134,7 @@ fn idle(_: ?*anyopaque) void {}
extern var __percpu_start: u8;
extern var __percpu_end: u8;
pub fn late_init() linksection(b.init) void {
pub fn late_init(_: *pl.BootInfo) linksection(b.init) void {
timer.init();
timer.init_cpu();