A Total Overhaul on the Lunaix's Virtual Memory Model (#26)

[lunaix-os.git] / lunaix-os / kernel / kinit.c

diff --git a/lunaix-os/kernel/kinit.c b/lunaix-os/kernel/kinit.c
index 607ba20a9d6aea6bcdb4bb11d05d978c4e9ca0d1..b19dc30dc34ed7d7725d3f38be43e92d13e8b08b 100644 (file)
--- a/lunaix-os/kernel/kinit.c
+++ b/lunaix-os/kernel/kinit.c
@@ -1,14 +1,12 @@
+#include <lunaix/types.h>

 #include <lunaix/block.h>
 #include <lunaix/boot_generic.h>
 #include <lunaix/block.h>
 #include <lunaix/boot_generic.h>

-#include <lunaix/common.h>

 #include <lunaix/device.h>
 #include <lunaix/foptions.h>
 #include <lunaix/fs/twifs.h>
 #include <lunaix/input.h>
 #include <lunaix/device.h>
 #include <lunaix/foptions.h>
 #include <lunaix/fs/twifs.h>
 #include <lunaix/input.h>

-#include <lunaix/lxconsole.h>

 #include <lunaix/mm/cake.h>
 #include <lunaix/mm/mmio.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/mm/pmm.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/mm/vmm.h>


@@ -17,24 +15,20 @@
 #include <lunaix/spike.h>
 #include <lunaix/trace.h>
 #include <lunaix/tty/tty.h>
 #include <lunaix/spike.h>
 #include <lunaix/trace.h>
 #include <lunaix/tty/tty.h>

-#include <lunaix/types.h>
+#include <lunaix/owloysius.h>
+#include <lunaix/pcontext.h>

 
 #include <hal/acpi/acpi.h>
 #include <hal/intc.h>
 
 #include <hal/acpi/acpi.h>
 #include <hal/intc.h>

-#include <hal/pci.h>

 
 #include <sys/abi.h>
 
 #include <sys/abi.h>

-#include <sys/interrupts.h>
-#include <sys/mm/mempart.h>
+#include <sys/mm/mm_defs.h>

 
 

-#include <klibc/stdio.h>
+#include <klibc/strfmt.h>

 #include <klibc/string.h>
 
 #include <klibc/string.h>
 

-extern void
-__proc0(); /* proc0.c */
-

 void
 void

-spawn_proc0();
+spawn_lunad();

 
 void
 kmem_init(struct boot_handoff* bhctx);
 
 void
 kmem_init(struct boot_handoff* bhctx);


@@ -51,113 +45,78 @@ kernel_bootstrap(struct boot_handoff* bhctx)
     /* Setup kernel memory layout and services */
     kmem_init(bhctx);
 
     /* Setup kernel memory layout and services */
     kmem_init(bhctx);
 

+    boot_parse_cmdline(bhctx);
+

     /* Prepare stack trace environment */
     trace_modksyms_init(bhctx);
 
     /* Prepare stack trace environment */
     trace_modksyms_init(bhctx);
 

-    // crt
-    tty_init(ioremap(VGA_FRAMEBUFFER, PG_SIZE));
-    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
-    lxconsole_init();
+    device_scan_drivers();

 
 

-    /* Get platform configuration */
-    acpi_init();
+    invoke_init_function(on_earlyboot);

 
 

-    /* Let's get fs online as soon as possible, as things rely on them */
-    vfs_init();
-    fsm_init();
-    input_init();
+    // FIXME this goes to hal/gfxa
+    tty_init(ioremap(0xB8000, PAGE_SIZE));
+    tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
+
+    device_sysconf_load();

 
     /* Get intc online, this is the cornerstone when initing devices */
     intc_init();
 
 
     /* Get intc online, this is the cornerstone when initing devices */
     intc_init();
 

-    /* System timing and clock support */

     clock_init();
     timer_init();
 
     clock_init();
     timer_init();
 

-    block_init();
+    /*
+        TODO autoload these init function that do not have dependency between
+       them
+    */

 
 

-    /* the bare metal are now happy, let's get software over with */
+    /* Let's get fs online as soon as possible, as things rely on them */
+    vfs_init();
+    fsm_init();
+    input_init();
+    block_init();

     sched_init();
 
     sched_init();
 

-    int errno = 0;
-    if ((errno = vfs_mount_root("ramfs", NULL))) {
-        panickf("Fail to mount root. (errno=%d)", errno);
-    }
+    device_onboot_load();
+
+    /* the bare metal are now happy, let's get software over with */

 
 

-    /* Mount these system-wide pseudo-fs */
-    vfs_mount("/dev", "devfs", NULL, 0);
-    vfs_mount("/sys", "twifs", NULL, MNT_RO);
-    vfs_mount("/task", "taskfs", NULL, MNT_RO);
+    must_success(vfs_mount_root("ramfs", NULL));
+    must_success(vfs_mount("/dev", "devfs", NULL, 0));
+    
+    invoke_init_function(on_boot);

 
 

-    lxconsole_spawn_ttydev();
-    device_init_builtin();
+    must_success(vfs_unmount("/dev"));

 
     /* Finish up bootstrapping sequence, we are ready to spawn the root process
      * and start geting into uspace
      */
     boot_end(bhctx);
 
     /* Finish up bootstrapping sequence, we are ready to spawn the root process
      * and start geting into uspace
      */
     boot_end(bhctx);

+    boot_cleanup();

 
 

-    spawn_proc0();
+    spawn_lunad();

 }
 
 }
 

+extern void
+lunad_main();
+

 /**
 /**

- * @brief 创建并运行proc0进程
+ * @brief 创建并运行Lunaix守护进程

  *
  */
 void
  *
  */
 void

-spawn_proc0()
+spawn_lunad()

 {
 {

-    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_chvmspace(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);
-    }
-
-    proc_init_transfer(proc0, KSTACK_TOP, (ptr_t)__proc0, 0);
-
-    // 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;
-    switch_context(proc0);
-
-    /* Should not return */
-    assert_msg(0, "Unexpected Return");
+    int has_error;
+    struct thread* kthread;
+    
+    has_error = spawn_process(&kthread, (ptr_t)lunad_main, false);
+    assert_msg(!has_error, "failed to spawn lunad");
+
+    run(kthread);
+    
+    fail("Unexpected Return");

 }
 
 void
 }
 
 void


@@ -165,13 +124,23 @@ kmem_init(struct boot_handoff* bhctx)
 {
     extern u8_t __kexec_end;
     // 将内核占据的页，包括前1MB，hhk_init 设为已占用
 {
     extern u8_t __kexec_end;
     // 将内核占据的页，包括前1MB，hhk_init 设为已占用

-    size_t pg_count = ((ptr_t)&__kexec_end - KERNEL_EXEC) >> PG_SIZE_BITS;
-    pmm_mark_chunk_occupied(KERNEL_PID, 0, pg_count, PP_FGLOCKED);
-
-    // reserve higher half
-    for (size_t i = L1_INDEX(KERNEL_EXEC); i < 1023; i++) {
-        assert(vmm_set_mapping(VMS_SELF, i << 22, 0, 0, VMAP_NOMAP));
-    }
+    size_t pg_count = leaf_count((ptr_t)&__kexec_end - KERNEL_RESIDENT);
+    pmm_mark_chunk_occupied(0, pg_count, PP_FGLOCKED);
+
+    pte_t* ptep = mkptep_va(VMS_SELF, KERNEL_RESIDENT);
+    ptep = mkl0tep(ptep);
+
+    do {
+#if   LnT_ENABLED(1)
+        assert(mkl1t(ptep++, 0, KERNEL_DATA));
+#elif LnT_ENABLED(2)
+        assert(mkl2t(ptep++, 0, KERNEL_DATA));
+#elif LnT_ENABLED(3)
+        assert(mkl3t(ptep++, 0, KERNEL_DATA));
+#else
+        assert(mklft(ptep++, 0, KERNEL_DATA));
+#endif
+    } while (ptep_vfn(ptep) < MAX_PTEN - 2);

 
     // allocators
     cake_init();
 
     // allocators
     cake_init();