X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/bb793d5c6918efee6a86de442463a7c9aaa4ecdd..b91be0033265b5b6bd716bd39cb0971da41906c4:/lunaix-os/kernel/k_init.c

diff --git a/lunaix-os/kernel/k_init.c b/lunaix-os/kernel/k_init.c
deleted file mode 100644
index 2dc39e6..0000000
--- a/lunaix-os/kernel/k_init.c
+++ /dev/null
@@ -1,204 +0,0 @@
-#include <lunaix/common.h>
-#include <lunaix/device.h>
-#include <lunaix/foptions.h>
-#include <lunaix/input.h>
-#include <lunaix/isrm.h>
-#include <lunaix/lxconsole.h>
-#include <lunaix/mm/cake.h>
-#include <lunaix/mm/mmio.h>
-#include <lunaix/mm/page.h>
-#include <lunaix/mm/pmm.h>
-#include <lunaix/mm/valloc.h>
-#include <lunaix/mm/vmm.h>
-#include <lunaix/process.h>
-#include <lunaix/sched.h>
-#include <lunaix/spike.h>
-#include <lunaix/syscall.h>
-#include <lunaix/tty/tty.h>
-#include <lunaix/types.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>
-
-extern u8_t __kernel_start;
-extern u8_t __kernel_end;
-extern u8_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;
-
-extern void
-__proc0(); /* proc0.c */
-
-void
-spawn_proc0();
-
-void
-setup_memory(multiboot_memory_map_t* map, size_t map_size);
-
-void
-_kernel_pre_init()
-{
-    // interrupts
-    _init_idt();
-    isrm_init();
-    intr_routine_init();
-
-    // memory
-    pmm_init(MEM_1MB + (_k_init_mb_info->mem_upper << 10));
-    vmm_init();
-
-    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);
-}
-
-void
-_kernel_init()
-{
-    int errno = 0;
-
-    // allocators
-    cake_init();
-    valloc_init();
-
-    sched_init();
-
-    // crt
-    tty_init(ioremap(VGA_FRAMEBUFFER, PG_SIZE));
-    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
-
-    // file system & device subsys
-    vfs_init();
-    fsm_init();
-    input_init();
-
-    vfs_export_attributes();
-
-    lxconsole_init();
-
-    if ((errno = vfs_mount_root("ramfs", NULL))) {
-        panickf("Fail to mount root. (errno=%d)", errno);
-    }
-
-    vfs_mount("/dev", "devfs", NULL, 0);
-    vfs_mount("/sys", "twifs", NULL, MNT_RO);
-    vfs_mount("/task", "taskfs", NULL, MNT_RO);
-
-    lxconsole_spawn_ttydev();
-    device_init_builtin();
-
-    syscall_install();
-
-    spawn_proc0();
-}
-
-/**
- * @brief 创建并运行proc0进程
- *
- */
-void
-spawn_proc0()
-{
-    struct proc_info* proc0 = alloc_process();
-
-    /**
-     * @brief
-     * 注意：这里和视频中说的不一样，属于我之后的一点微调。
-     * 在视频中，spawn_proc0是在_kernel_post_init的末尾才调用的。并且是直接跳转到_proc0
-     *
-     * 但是我后来发现，上述的方法会产生竞态条件。这是因为spawn_proc0被调用的时候，时钟中断已经开启，
-     * 而中断的产生会打乱栈的布局，从而使得下面的上下文设置代码产生未定义行为（Undefined
-     * Behaviour）。 为了保险起见，有两种办法：
-     *      1. 在创建proc0进程前关闭中断
-     *      2. 将_kernel_post_init搬进proc0进程
-     * （_kernel_post_init已经更名为init_platform）
-     *
-     * 目前的解决方案是2
-     */
-
-    proc0->parent = proc0;
-
-    // 方案1：必须在读取eflags之后禁用。否则当进程被调度时，中断依然是关闭的！
-    // cpu_disable_interrupt();
-
-    /* Ok... 首先fork进我们的零号进程，而后由那里，我们fork进init进程。 */
-
-    // 把当前虚拟地址空间（内核）复制一份。
-    proc0->page_table = vmm_dup_vmspace(proc0->pid);
-
-    // 直接切换到新的拷贝，进行配置。
-    cpu_ldvmspace(proc0->page_table);
-
-    // 为内核创建一个专属栈空间。
-    for (size_t i = 0; i < (KSTACK_SIZE >> PG_SIZE_BITS); i++) {
-        ptr_t pa = pmm_alloc_page(KERNEL_PID, 0);
-        vmm_set_mapping(VMS_SELF,
-                        KSTACK_START + (i << PG_SIZE_BITS),
-                        pa,
-                        PG_PREM_RW,
-                        VMAP_NULL);
-    }
-
-    struct exec_param* execp =
-      (struct exec_param*)(KSTACK_TOP - sizeof(struct exec_param));
-    isr_param* isrp = (isr_param*)((ptr_t)execp - sizeof(isr_param));
-
-    *execp = (struct exec_param){ .cs = KCODE_SEG,
-                                  .eip = (ptr_t)__proc0,
-                                  .ss = KDATA_SEG,
-                                  .eflags = cpu_reflags() };
-    *isrp = (isr_param){ .registers = { .ds = KDATA_SEG,
-                                        .es = KDATA_SEG,
-                                        .fs = KDATA_SEG,
-                                        .gs = KDATA_SEG },
-                         .execp = execp };
-
-    proc0->intr_ctx = isrp;
-
-    // 向调度器注册进程。
-    commit_process(proc0);
-
-    // 由于时钟中断与APIC未就绪，我们需要手动进行第一次调度。这里也会同时隐式地恢复我们的eflags.IF位
-    proc0->state = PS_RUNNING;
-    asm volatile("pushl %0\n"
-                 "jmp switch_to\n" ::"r"(proc0));
-
-    /* Should not return */
-    assert_msg(0, "Unexpected Return");
-}
-
-// 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];
-        if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
-            // 整数向上取整除法
-            ptr_t pg = map[i].addr_low + 0x0fffU;
-            pmm_mark_chunk_free(pg >> PG_SIZE_BITS,
-                                map[i].len_low >> PG_SIZE_BITS);
-        }
-    }
-
-    // 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, PP_FGLOCKED);
-
-    // reserve higher half
-    for (size_t i = L1_INDEX(KERNEL_MM_BASE); i < 1023; i++) {
-        assert(vmm_set_mapping(VMS_SELF, i << 22, 0, 0, VMAP_NOMAP));
-    }
-}