-#include <lunaix/constants.h>
+#include <lunaix/common.h>
#include <lunaix/tty/tty.h>
#include <lunaix/mm/page.h>
#include <lunaix/mm/pmm.h>
#include <lunaix/mm/vmm.h>
+#include <lunaix/mm/kalloc.h>
+#include <lunaix/spike.h>
+#include <lunaix/syslog.h>
+#include <lunaix/timer.h>
+#include <lunaix/clock.h>
+#include <lunaix/peripheral/ps2kbd.h>
+#include <lunaix/process.h>
+#include <lunaix/sched.h>
+#include <lunaix/syscall.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 <klibc/stdio.h>
+#include <klibc/string.h>
#include <stdint.h>
#include <stddef.h>
extern uint8_t __kernel_end;
extern uint8_t __init_hhk_end;
+#define PP_KERN_SHARED (PP_FGSHARED | PP_TKERN)
+
+// Set remotely by kernel/asm/x86/prologue.S
+multiboot_info_t* _k_init_mb_info;
+
+x86_page_table* __kernel_ptd;
+
+struct proc_info tmp;
+
+LOG_MODULE("BOOT");
+
+extern void _lxinit_main();
+void spawn_lxinit();
+void _kernel_post_init();
+
+void
+setup_memory(multiboot_memory_map_t* map, size_t map_size);
+
void
-_kernel_pre_init(multiboot_info_t* mb_info) {
+lock_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);
+
+ __kernel_ptd = cpu_rcr3();
+
+ tmp = (struct proc_info) {
+ .page_table = __kernel_ptd
+ };
+
+ __current = &tmp;
}
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);
+
+ 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);
- printf("[MM] Mem: %d KiB, Extended Mem: %d KiB\n",
- mb_info->mem_lower,
- mb_info->mem_upper);
+ // 为内核创建一个专属栈空间。
+ for (size_t i = 0; i < (KSTACK_SIZE >> PG_SIZE_BITS); i++) {
+ vmm_alloc_page(KERNEL_PID, (void*)(KSTACK_START + (i << PG_SIZE_BITS)), NULL, PG_PREM_RW, 0);
+ }
+ kprintf(KINFO "[MM] Allocated %d pages for stack start at %p\n", KSTACK_SIZE>>PG_SIZE_BITS, KSTACK_START);
+
+ sched_init();
+}
+
+/**
+ * @brief 创建并运行init进程
+ *
+ */
+void spawn_lxinit() {
+ struct proc_info kinit;
+
+ memset(&kinit, 0, sizeof(kinit));
+ kinit.parent = -1;
+ kinit.pid = 1;
+ kinit.intr_ctx = (isr_param) {
+ .registers.esp = KSTACK_TOP - 20,
+ .cs = KCODE_SEG,
+ .eip = (void*)_lxinit_main,
+ .ss = KDATA_SEG,
+ .eflags = cpu_reflags()
+ };
+ kinit.page_table = dup_pagetable(kinit.pid);
+
+ // Ok... 准备fork进我们的init进程
+ /*
+ 这里是一些栈的设置，因为我们将切换到一个新的地址空间里，并且使用一个全新的栈。
+ 让iret满意！
+ */
+ asm volatile(
+ "movl %%cr3, %%eax\n"
+ "movl %%esp, %%ebx\n"
+ "movl %0, %%cr3\n"
+ "movl %1, %%esp\n"
+ "pushf\n"
+ "pushl %2\n"
+ "pushl %3\n"
+ "pushl $0\n"
+ "pushl $0\n"
+ "movl %%eax, %%cr3\n"
+ "movl %%ebx, %%esp\n"
+ ::"r"(kinit.page_table), "i"(KSTACK_TOP), "i"(KCODE_SEG), "r"(kinit.intr_ctx.eip)
+ :"%eax", "%ebx", "memory"
+ );
+
+ // 向调度器注册进程，然后这里阻塞等待调度器调度就好了。
+ push_process(&kinit);
- unsigned int map_size = mb_info->mmap_length / sizeof(multiboot_memory_map_t);
- setup_memory(mb_info->mmap_addr, map_size);
- setup_kernel_runtime();
}
void
_kernel_post_init() {
- printf("[KERNEL] === Post Initialization === \n");
+ assert_msg(kalloc_init(), "Fail to initialize heap");
+
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++) {
- vmm_unmap_page((void*)(i << PG_SIZE_BITS));
+ // 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(KERNEL_PID, (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();
+
+ acpi_init(_k_init_mb_info);
+ uintptr_t ioapic_addr = acpi_get_context()->madt.ioapic->ioapic_addr;
+ pmm_mark_page_occupied(KERNEL_PID, FLOOR(__APIC_BASE_PADDR, PG_SIZE_BITS), 0);
+ pmm_mark_page_occupied(KERNEL_PID, FLOOR(ioapic_addr, PG_SIZE_BITS), 0);
+
+ vmm_set_mapping(KERNEL_PID, APIC_BASE_VADDR, __APIC_BASE_PADDR, PG_PREM_RW);
+ vmm_set_mapping(KERNEL_PID, IOAPIC_BASE_VADDR, ioapic_addr, PG_PREM_RW);
+
+ apic_init();
+ ioapic_init();
+ timer_init(SYS_TIMER_FREQUENCY_HZ);
+ clock_init();
+ ps2_kbd_init();
+
+ syscall_install();
+
+ for (size_t i = 256; i < hhk_init_pg_count; i++) {
+ vmm_unmap_page(KERNEL_PID, (void*)(i << PG_SIZE_BITS));
+ }
+
+ spawn_lxinit();
+
+ spin();
+}
+
+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(KERNEL_PID, (pa + (j << PG_SIZE_BITS)), (pa + (j << PG_SIZE_BITS)), PG_PREM_R);
+ }
}
}
// 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);
// 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(KERNEL_PID, 0, pg_count, 0);
+ kprintf(KINFO "[MM] Allocated %d pages for kernel.\n", pg_count);
size_t vga_buf_pgs = VGA_BUFFER_SIZE >> PG_SIZE_BITS;
// 首先，标记VGA部分为已占用
- pmm_mark_chunk_occupied(VGA_BUFFER_PADDR >> PG_SIZE_BITS, vga_buf_pgs);
+ pmm_mark_chunk_occupied(KERNEL_PID, VGA_BUFFER_PADDR >> PG_SIZE_BITS, vga_buf_pgs, 0);
// 重映射VGA文本缓冲区（以后会变成显存，i.e., framebuffer）
for (size_t i = 0; i < vga_buf_pgs; i++)
{
vmm_map_page(
+ KERNEL_PID,
(void*)(VGA_BUFFER_VADDR + (i << PG_SIZE_BITS)),
(void*)(VGA_BUFFER_PADDR + (i << PG_SIZE_BITS)),
PG_PREM_RW
// 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);
-}
-
-void
-setup_kernel_runtime() {
- // 为内核创建一个专属栈空间。
- 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] Mapped VGA to %p.\n", VGA_BUFFER_VADDR);
}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / blobdiff