X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/37fb1e9cee287c9ae8c065ff517c508eb5f9d7dd..05b7549a0f980efa33265a091a5174a78851ce05:/lunaix-os/kernel/k_init.c

diff --git a/lunaix-os/kernel/k_init.c b/lunaix-os/kernel/k_init.c
index 444aab0..2dbd64e 100644
--- a/lunaix-os/kernel/k_init.c
+++ b/lunaix-os/kernel/k_init.c
@@ -6,11 +6,18 @@
 #include <lunaix/mm/vmm.h>
 #include <lunaix/mm/kalloc.h>
 #include <lunaix/spike.h>
+#include <lunaix/syslog.h>
+
+#include <hal/rtc.h>
+#include <hal/apic.h>
+#include <hal/ioapic.h>
+#include <hal/acpi/acpi.h>
 
 #include <arch/x86/boot/multiboot.h>
 #include <arch/x86/idt.h>
+#include <arch/x86/interrupts.h>
 
-#include <libc/stdio.h>
+#include <klibc/stdio.h>
 
 #include <stdint.h>
 #include <stddef.h>
@@ -20,6 +27,10 @@ extern uint8_t __kernel_start;
 extern uint8_t __kernel_end;
 extern uint8_t __init_hhk_end;
 
+multiboot_info_t* _k_init_mb_info;
+
+LOG_MODULE("INIT");
+
 void
 setup_memory(multiboot_memory_map_t* map, size_t map_size);
 
@@ -27,49 +38,112 @@ void
 setup_kernel_runtime();
 
 void
-_kernel_pre_init(multiboot_info_t* mb_info) {
+lock_reserved_memory();
+
+void
+unlock_reserved_memory();
+
+void
+_kernel_pre_init() {
     _init_idt();
+    intr_routine_init();
 
-    pmm_init(MEM_1MB + (mb_info->mem_upper << 10));
+    pmm_init(MEM_1MB + (_k_init_mb_info->mem_upper << 10));
     vmm_init();
+    rtc_init();
 
     tty_init((void*)VGA_BUFFER_PADDR);
-    tty_set_theme(VGA_COLOR_GREEN, VGA_COLOR_BLACK);
+    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
 }
 
 void
-_kernel_init(multiboot_info_t* mb_info) {
-    printf("[KERNEL] === Initialization === \n");
+_kernel_init() {
+    kprintf("[MM] Mem: %d KiB, Extended Mem: %d KiB\n",
+           _k_init_mb_info->mem_lower,
+           _k_init_mb_info->mem_upper);
 
-    printf("[MM] Mem: %d KiB, Extended Mem: %d KiB\n",
-           mb_info->mem_lower,
-           mb_info->mem_upper);
+    unsigned int map_size = _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
+    
+    setup_memory((multiboot_memory_map_t*)_k_init_mb_info->mmap_addr, map_size);
 
-    unsigned int map_size = mb_info->mmap_length / sizeof(multiboot_memory_map_t);
-    setup_memory((multiboot_memory_map_t*)mb_info->mmap_addr, map_size);
     setup_kernel_runtime();
 }
 
 void 
 _kernel_post_init() {
-    printf("[KERNEL] === Post Initialization === \n");
     size_t hhk_init_pg_count = ((uintptr_t)(&__init_hhk_end)) >> PG_SIZE_BITS;
-    printf("[MM] Releaseing %d pages from 0x0.\n", hhk_init_pg_count);
+    kprintf(KINFO "[MM] Releaseing %d pages from 0x0.\n", hhk_init_pg_count);
 
-    // 清除 hhk_init 与前1MiB的映射
-    for (size_t i = 0; i < hhk_init_pg_count; i++) {
+    // Fuck it, I will no longer bother this little 1MiB
+    // I just release 4 pages for my APIC & IOAPIC remappings
+    for (size_t i = 0; i < 3; i++) {
         vmm_unmap_page((void*)(i << PG_SIZE_BITS));
     }
+    
+    // 锁定所有系统预留页（内存映射IO，ACPI之类的），并且进行1:1映射
+    lock_reserved_memory();
 
-    assert_msg(kalloc_init(), "Fail to initialize heap");
+    acpi_init(_k_init_mb_info);
+    uintptr_t ioapic_addr = acpi_get_context()->madt.ioapic->ioapic_addr;
+
+    pmm_mark_page_occupied(FLOOR(__APIC_BASE_PADDR, PG_SIZE_BITS));
+    pmm_mark_page_occupied(FLOOR(ioapic_addr, PG_SIZE_BITS));
+
+    vmm_set_mapping(APIC_BASE_VADDR, __APIC_BASE_PADDR, PG_PREM_RW);
+    vmm_set_mapping(IOAPIC_BASE_VADDR, ioapic_addr, PG_PREM_RW);
+
+    ioapic_init();
+    init_apic();
+
+    for (size_t i = 256; i < hhk_init_pg_count; i++) {
+        vmm_unmap_page((void*)(i << PG_SIZE_BITS));
+    }
+}
+
+void
+lock_reserved_memory() {
+    multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr;
+    size_t map_size = _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
+    for (unsigned int i = 0; i < map_size; i++) {
+        multiboot_memory_map_t mmap = mmaps[i];
+        if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
+            continue;
+        }
+        uint8_t* pa = PG_ALIGN(mmap.addr_low);
+        size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS);
+        for (size_t j = 0; j < pg_num; j++)
+        {
+            vmm_set_mapping((pa + (j << PG_SIZE_BITS)), (pa + (j << PG_SIZE_BITS)), PG_PREM_R);
+        }
+    }
+}
+
+void
+unlock_reserved_memory() {
+    multiboot_memory_map_t* mmaps = _k_init_mb_info->mmap_addr;
+    size_t map_size = _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
+    for (unsigned int i = 0; i < map_size; i++) {
+        multiboot_memory_map_t mmap = mmaps[i];
+        if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
+            continue;
+        }
+        uint8_t* pa = PG_ALIGN(mmap.addr_low);
+        size_t pg_num = CEIL(mmap.len_low, PG_SIZE_BITS);
+        for (size_t j = 0; j < pg_num; j++)
+        {
+            vmm_unmap_page((pa + (j << PG_SIZE_BITS)));
+        }
+    }
 }
 
 // 按照 Memory map 标识可用的物理页
 void
 setup_memory(multiboot_memory_map_t* map, size_t map_size) {
+
+    // First pass, to mark the physical pages
     for (unsigned int i = 0; i < map_size; i++) {
         multiboot_memory_map_t mmap = map[i];
-        printf("[MM] Base: 0x%x, len: %u KiB, type: %u\n",
+        kprintf("[MM] Base: 0x%x, len: %u KiB, type: %u\n",
                map[i].addr_low,
                map[i].len_low >> 10,
                map[i].type);
@@ -77,16 +151,16 @@ setup_memory(multiboot_memory_map_t* map, size_t map_size) {
             // 整数向上取整除法
             uintptr_t pg = map[i].addr_low + 0x0fffU;
             pmm_mark_chunk_free(pg >> PG_SIZE_BITS, map[i].len_low >> PG_SIZE_BITS);
-            printf("[MM] Freed %u pages start from 0x%x\n",
+            kprintf(KINFO "[MM] Freed %u pages start from 0x%x\n",
                    map[i].len_low >> PG_SIZE_BITS,
                    pg & ~0x0fffU);
         }
     }
 
-    // 将内核占据的页设为已占用
-    size_t pg_count = (uintptr_t)(&__kernel_end - &__kernel_start) >> PG_SIZE_BITS;
-    pmm_mark_chunk_occupied(V2P(&__kernel_start) >> PG_SIZE_BITS, pg_count);
-    printf("[MM] Allocated %d pages for kernel.\n", pg_count);
+    // 将内核占据的页，包括前1MB，hhk_init 设为已占用
+    size_t pg_count = V2P(&__kernel_end) >> PG_SIZE_BITS;
+    pmm_mark_chunk_occupied(0, pg_count);
+    kprintf(KINFO "[MM] Allocated %d pages for kernel.\n", pg_count);
 
 
     size_t vga_buf_pgs = VGA_BUFFER_SIZE >> PG_SIZE_BITS;
@@ -107,7 +181,8 @@ setup_memory(multiboot_memory_map_t* map, size_t map_size) {
     // 更新VGA缓冲区位置至虚拟地址
     tty_set_buffer((void*)VGA_BUFFER_VADDR);
 
-    printf("[MM] Mapped VGA to %p.\n", VGA_BUFFER_VADDR);
+    kprintf(KINFO "[MM] Mapped VGA to %p.\n", VGA_BUFFER_VADDR);
+    
 }
 
 void
@@ -116,5 +191,6 @@ setup_kernel_runtime() {
     for (size_t i = 0; i < (K_STACK_SIZE >> PG_SIZE_BITS); i++) {
         vmm_alloc_page((void*)(K_STACK_START + (i << PG_SIZE_BITS)), PG_PREM_RW);
     }
-    printf("[MM] Allocated %d pages for stack start at %p\n", K_STACK_SIZE>>PG_SIZE_BITS, K_STACK_START);
+    kprintf(KINFO "[MM] Allocated %d pages for stack start at %p\n", K_STACK_SIZE>>PG_SIZE_BITS, K_STACK_START);
+    assert_msg(kalloc_init(), "Fail to initialize heap");
 }
\ No newline at end of file