Vystem 0.2

shelter/lib/include/cpu/ap.h

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: MPL-2.0
+#ifndef SH_LIB_AP_H
+#define SH_LIB_AP_H
+#include "std/status.h"
+#include "std/type.h"
+#include "memory/memory.h"
+#include "irq/gdt.h"
+#include "irq/idt.h"
+#include "devs/apic/lapic.h"
+#define SH_AP_AP_TRAMPOLINE 0x7000
+#define SH_AP_GDT_32_PA 0x8000
+#define SH_AP_BOOTSTRAP_PA 0x9000
+#define SH_AP_TRAMPOLINE_PAYLOAD 0xA000
+#define SH_AP_STATE_PENDING 0x00
+#define SH_AP_STATE_NO_LAPIC 0x01
+#define SH_AP_STATE_OK 0x02
+// Fill the 32 bits GDT used by AP trampoline
+SH_STATUS sh_ap_load_gdt_32();
+// AP boostrap structure, shared with each AP
+#pragma pack(1)
+typedef struct {
+  sh_page_PHYSICAL_ADDRESS lapic_base_pa;
+  sh_page_VIRTUAL_ADDRESS c_entry_point_va;
+  sh_page_PHYSICAL_ADDRESS page_table_pa;
+  sh_page_VIRTUAL_ADDRESS cpu_struct_base_area;
+  sh_page_VIRTUAL_ADDRESS shared_gdt_64_va;
+  sh_gdt_GDTR gdt_64_gdtr;
+  sh_idt_IDT *idt;
+} sh_ap_AP_BOOTSTRAP;
+#pragma pack()
+// Per-CPU structure, one for each AP
+#pragma pack(1)
+typedef struct {
+  sh_uint64 cpu_id;
+  sh_uint32 bytes_outputed;
+  sh_bool timer_state;
+  char *temp_buffer;
+  sh_uint64 temp_buffer_size;
+} sh_ap_PER_CPU;
+#pragma pack()
+// CPU structure, one for each AP
+#pragma pack(1)
+typedef struct {
+  sh_page_VIRTUAL_ADDRESS c_entry_point_stack_top_va;
+  sh_uint32 lapic_id; // just for the tranpoline to confirm it has found his own struct
+  sh_uint16 tss_selector;
+  sh_ap_PER_CPU *per_cpu;
+} sh_ap_CPU_STRUCT;
+#pragma pack()
+// Allocate each sets of stacks for each TSS and each C stack, create each TSS entry, create global GDT64, create the CPU structure area, create and fill each CPU structure, create the AP bootstrap structure and place it correctly
+SH_STATUS sh_ap_prepare_for_smp_launch(sh_lapic_DEVICE **lapic_dev_array,sh_uint64 max_lapic_id,sh_uint64 expected_lapic_found,sh_conf_BOOT_CONFIG *boot_config,sh_idt_IDT *idt);
+// AP C entry point
+void sh_ap_entry_point();
+// Start AP boot procedure
+SH_STATUS sh_ap_start_ap_boot_procedure(sh_conf_BOOT_CONFIG *boot_config);
+#endif