feat: (devfs) a new filesystem for device exposure.

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

diff --git a/lunaix-os/kernel/k_init.c b/lunaix-os/kernel/k_init.c
index 257112e7d438ccaf81f5a28654222ee4db29b445..a443ec039a724cfb575bbcfcd63ddebfdc33d4ae 100644 (file)
--- a/lunaix-os/kernel/k_init.c
+++ b/lunaix-os/kernel/k_init.c
@@ -1,18 +1,16 @@
 #include <lunaix/common.h>
 #include <lunaix/tty/tty.h>
 
-#include <lunaix/clock.h>
-#include <lunaix/mm/kalloc.h>
+#include <lunaix/device.h>
+#include <lunaix/foptions.h>
+#include <lunaix/lxconsole.h>
 #include <lunaix/mm/page.h>
 #include <lunaix/mm/pmm.h>
 #include <lunaix/mm/vmm.h>
 #include <lunaix/process.h>
 #include <lunaix/sched.h>
 #include <lunaix/spike.h>
-#include <lunaix/syslog.h>
-#include <lunaix/timer.h>
-
-#include <hal/rtc.h>
+#include <lunaix/types.h>
 
 #include <arch/x86/boot/multiboot.h>
 #include <arch/x86/idt.h>
@@ -21,9 +19,6 @@
 #include <klibc/stdio.h>
 #include <klibc/string.h>
 
-#include <stddef.h>
-#include <stdint.h>
-
 extern uint8_t __kernel_start;
 extern uint8_t __kernel_end;
 extern uint8_t __init_hhk_end;
@@ -37,8 +32,6 @@ x86_page_table* __kernel_ptd;
 
 struct proc_info tmp;
 
-LOG_MODULE("BOOT");
-
 extern void
 __proc0(); /* proc0.c */
 
@@ -56,9 +49,13 @@ _kernel_pre_init()
 
     pmm_init(MEM_1MB + (_k_init_mb_info->mem_upper << 10));
     vmm_init();
-    rtc_init();
 
-    tty_init((void*)VGA_BUFFER_PADDR);
+    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);
+
+    tty_init((void*)VGA_BUFFER_VADDR);
     tty_set_theme(VGA_COLOR_WHITE, VGA_COLOR_BLACK);
 
     __kernel_ptd = cpu_rcr3();
@@ -71,18 +68,21 @@ _kernel_pre_init()
 void
 _kernel_init()
 {
-    kprintf("[MM] Mem: %d KiB, Extended Mem: %d KiB\n",
-            _k_init_mb_info->mem_lower,
-            _k_init_mb_info->mem_upper);
+    int errno = 0;
+    cake_init();
+    valloc_init();
 
-    unsigned int map_size =
-      _k_init_mb_info->mmap_length / sizeof(multiboot_memory_map_t);
+    lxconsole_init();
 
-    setup_memory((multiboot_memory_map_t*)_k_init_mb_info->mmap_addr, map_size);
+    vfs_init();
+    fsm_init();
+
+    if ((errno = vfs_mount_root("ramfs", NULL))) {
+        panickf("Fail to mount root. (errno=%d)", errno);
+    }
 
-    kprintf(KINFO "[MM] Allocated %d pages for stack start at %p\n",
-            KSTACK_SIZE >> PG_SIZE_BITS,
-            KSTACK_START);
+    vfs_mount("/dev", "devfs", NULL, 0);
+    vfs_mount("/sys", "twifs", NULL, MNT_RO);
 
     sched_init();
 
@@ -121,6 +121,7 @@ spawn_proc0()
                                    .eip = (void*)__proc0,
                                    .ss = KDATA_SEG,
                                    .eflags = cpu_reflags() };
+    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();
@@ -161,7 +162,7 @@ spawn_proc0()
     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 = PROC_RUNNING;
+    proc0->state = PS_RUNNING;
     asm volatile("pushl %0\n"
                  "jmp switch_to\n" ::"r"(proc0));
 
@@ -180,31 +181,23 @@ 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];
-        kprintf("[MM] Base: 0x%x, len: %u KiB, type: %u\n",
-                map[i].addr_low,
-                map[i].len_low >> 10,
-                map[i].type);
         if (mmap.type == MULTIBOOT_MEMORY_AVAILABLE) {
             // 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);
-            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，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
+    // 首先，标记VGA部分为已占用，并且锁定
     pmm_mark_chunk_occupied(
-      KERNEL_PID, VGA_BUFFER_PADDR >> PG_SIZE_BITS, vga_buf_pgs, 0);
+      KERNEL_PID, VGA_BUFFER_PADDR >> PG_SIZE_BITS, vga_buf_pgs, PP_FGLOCKED);
 
     // 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++) {
@@ -215,16 +208,7 @@ setup_memory(multiboot_memory_map_t* map, size_t map_size)
                         VMAP_NULL);
     }
 
-    assert_msg(!((uintptr_t)&__usrtext_start & 0xfff) &&
-                 !((uintptr_t)&__usrtext_end & 0xfff),
-               "Bad usrtext alignment");
-
     for (uintptr_t i = &__usrtext_start; i < &__usrtext_end; i += PG_SIZE) {
         vmm_set_mapping(PD_REFERENCED, i, V2P(i), PG_PREM_UR, VMAP_NULL);
     }
-
-    // 更新VGA缓冲区位置至虚拟地址
-    tty_set_buffer((void*)VGA_BUFFER_VADDR);
-
-    kprintf(KINFO "[MM] Mapped VGA to %p.\n", VGA_BUFFER_VADDR);
 }