x86_64: acpi: add minimal SMP core startup

2023-02-09 21:39:20 +00:00
parent d960909d1b
commit 81ca98c952
5 changed files with 169 additions and 3 deletions
--- a/arch/x86_64/acpi/ap_trampoline.S
+++ b/arch/x86_64/acpi/ap_trampoline.S
@@ -0,0 +1,28 @@
+
+	.global acpi_bsp_lapic_id
+	.type acpi_bsp_lapic_id, @function
+
+acpi_bsp_lapic_id:
+	push %rbp
+	mov %rsp, %rbp
+
+	push %rbx
+
+	mov $0x00000001, %eax
+	cpuid
+	shrq $0x18, %rbx
+
+	mov %rbx, %rax
+
+	pop %rbx
+	pop %rbp
+	ret
+
+	.global ap_trampoline
+	.type ap_trampoline, @function
+	.code16
+
+ap_trampoline:
+	mov $0xFF, %ax
+	cli
+	hlt