X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/7804c2dae30700296c3205aaf7f546f491999bf4..35a7d633d3f16c1e0539af6ca5d8e7482926cd93:/lunaix-os/kernel/kinit.c

diff --git a/lunaix-os/kernel/kinit.c b/lunaix-os/kernel/kinit.c
index 5ace096..38804f2 100644
--- a/lunaix-os/kernel/kinit.c
+++ b/lunaix-os/kernel/kinit.c
@@ -1,189 +1,169 @@
-#include <lunaix/common.h>
+#include <lunaix/types.h>
+#include <lunaix/block.h>
+#include <lunaix/boot_generic.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/page.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/abi.h>
-#include <arch/exception.h>
-#include <arch/i386/boot/multiboot.h>
-#include <arch/i386/interrupts.h>
+#include <lunaix/trace.h>
+#include <lunaix/owloysius.h>
+#include <lunaix/hart_state.h>
+#include <lunaix/syslog.h>
+#include <lunaix/sections.h>
 
-#include <klibc/stdio.h>
-#include <klibc/string.h>
+#include <hal/devtree.h>
 
-extern u8_t __kernel_start;
-extern u8_t __kernel_end;
-extern u8_t __init_hhk_end;
+#include <asm/mm_defs.h>
 
-#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;
+LOG_MODULE("kinit")
 
 extern void
-__proc0(); /* proc0.c */
-
-void
-spawn_proc0();
+lunad_main();
 
-void
-setup_memory(multiboot_memory_map_t* map, size_t map_size);
-
-void
-_kernel_pre_init()
+/**
+ * @brief 创建并运行Lunaix守护进程
+ *
+ */
+static void
+spawn_lunad()
 {
-    // interrupts
-    exception_init();
+    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");
+}
 
-    // memory
-    pmm_init(MEM_1MB + (_k_init_mb_info->mem_upper << 10));
-    vmm_init();
+static void
+kmem_init(struct boot_handoff* bhctx)
+{
+    pte_t* ptep = mkptep_va(VMS_SELF, KERNEL_RESIDENT);
 
-    unsigned int map_size =
-      _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
+    ptep = mkl0tep(ptep);
 
-    setup_memory((multiboot_memory_map_t*)_k_init_mb_info->mmap_addr, map_size);
-}
+    unsigned int i = ptep_vfn(ptep);
+    do {
+        if (lntep_implie_vmnts(ptep, L0T_SIZE)) {
+            ptep++;
+            continue;
+        }
 
-void
-_kernel_init()
-{
-    int errno = 0;
+#if   LnT_ENABLED(1)
+        assert(mkl1t(ptep++, 0, KERNEL_PGTAB));
+#elif LnT_ENABLED(2)
+        assert(mkl2t(ptep++, 0, KERNEL_PGTAB));
+#elif LnT_ENABLED(3)
+        assert(mkl3t(ptep++, 0, KERNEL_PGTAB));
+#else
+        assert(mklft(ptep++, 0, KERNEL_PGTAB));
+#endif
+    } while (++i < MAX_PTEN);
 
     // 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();
+static void
+__remap_and_load_dtb(struct boot_handoff* bhctx)
+{
+#ifdef CONFIG_USE_DEVICETREE
+    ptr_t dtb = bhctx->kexec.dtb_pa;
 
-    lxconsole_init();
+    if (!dtb) {
+        return;
+    }
 
-    if ((errno = vfs_mount_root("ramfs", NULL))) {
-        panickf("Fail to mount root. (errno=%d)", errno);
+    if (va_offset(dtb)) {
+        WARN("bad-aligned dtb location, expect page aligned");
+        return;
     }
 
-    vfs_mount("/dev", "devfs", NULL, 0);
-    vfs_mount("/sys", "twifs", NULL, MNT_RO);
-    vfs_mount("/task", "taskfs", NULL, MNT_RO);
+    pte_t *ptep, pte;
+    size_t nr_pages;
+    bool loaded;
+    
+    pte  = mkpte(dtb, KERNEL_DATA);
+    ptep = mkptep_va(VMS_SELF, dtb_start);
+    nr_pages = leaf_count(CONFIG_DTB_MAXSIZE);
 
-    lxconsole_spawn_ttydev();
-    device_init_builtin();
+    pmm_onhold_range(dtb, nr_pages);
+    vmm_set_ptes_contig(ptep, pte, PAGE_SIZE, nr_pages);
 
-    syscall_install();
+    loaded = dt_load(dtb_start);
+    if (!loaded) {
+        ERROR("dtb load failed");
+    }
+#endif
 
-    spawn_proc0();
+    return;
 }
 
-/**
- * @brief 创建并运行proc0进程
- *
- */
 void
-spawn_proc0()
+kernel_bootstrap(struct boot_handoff* bhctx)
 {
-    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
-     */
+    pmm_init(bhctx);
+    // now we can start reserving physical space
 
-    proc0->parent = proc0;
+    /* Begin kernel bootstrapping sequence */
+    boot_begin(bhctx);
 
-    // 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();
+    /* Setup kernel memory layout and services */
+    kmem_init(bhctx);
 
-    /* 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);
+    boot_parse_cmdline(bhctx);
 
-    // 直接切换到新的拷贝，进行配置。
-    cpu_chvmspace(proc0->page_table);
+    /* Prepare stack trace environment */
+    trace_modksyms_init(bhctx);
 
-    // 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);
-    }
+    device_scan_drivers();
 
-    proc_init_transfer(proc0, KSTACK_TOP, (ptr_t)__proc0, 0);
+    initfn_invoke_sysconf();
+    
+    __remap_and_load_dtb(bhctx);
+    device_sysconf_load();
 
-    // 向调度器注册进程。
-    commit_process(proc0);
+    // TODO register devtree hooks
+    // TODO re-scan devtree to bind devices.
 
-    // 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));
+    clock_init();
+    timer_init();
 
-    /* Should not return */
-    assert_msg(0, "Unexpected Return");
-}
+    initfn_invoke_earlyboot();
 
-// 按照 Memory map 标识可用的物理页
-void
-setup_memory(multiboot_memory_map_t* map, size_t map_size)
-{
+    vfs_init();
+    fsm_init();
+    input_init();
+    block_init();
+    sched_init();
 
-    // 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);
-        }
-    }
+    device_onboot_load();
 
-    // 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);
+    /* the bare metal are now happy, let's get software over with */
 
-    // 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));
-    }
+    must_success(vfs_mount_root("ramfs", NULL));
+    must_success(vfs_mount("/dev", "devfs", NULL, 0));
+    
+    initfn_invoke_boot();
+
+    /* Finish up bootstrapping sequence, we are ready to spawn the root process
+     * and start geting into uspace
+     */
+    boot_end(bhctx);
+
+    spawn_lunad();
 }
+