Initial commit

2026-02-04 01:58:49 +01:00
commit 0e01345abf
117 changed files with 5076 additions and 0 deletions
@@ -0,0 +1,42 @@
+#include <zinnia/archctl.h>
+#include <zinnia/status.h>
+#include <kernel/compiler.h>
+#include <kernel/init.h>
+#include <kernel/percpu.h>
+#include <gdt.h>
+#include "asm.h"
+#include "defs.h"
+
+[[__init, __naked]]
+void _start() {
+    asm volatile(
+        "lea rsp, [rip + %0]\n"
+        "jmp %1"
+        :
+        : "i"(__ld_stack_top), "r"(kernel_entry)
+    );
+}
+
+void percpu_bsp_early_init() {
+    asm_wrmsr(MSR_GS_BASE, (uint64_t)&percpu_bsp);
+    asm_wrmsr(MSR_FS_BASE, 0);
+    asm_wrmsr(MSR_KERNEL_GS_BASE, 0);
+
+    gdt_init();
+}
+
+[[noreturn]]
+void arch_panic() {
+    asm volatile("cli; hlt");
+    __unreachable();
+}
+
+zn_status_t arch_archctl(zn_archctl_t op, uintptr_t arg) {
+    switch (op) {
+    case ZN_ARCHCTL_SET_FSBASE:
+        asm_wrmsr(MSR_FS_BASE, arg);
+        return 0;
+    default:
+        return ZN_ERR_BAD_ARG;
+    }
+}