From c63f340d90800895f007de64b7d2d14624263331 Mon Sep 17 00:00:00 2001
From: nthnluu <nate1299@me.com>
Date: Sun, 28 Jan 2024 21:20:27 -0500
Subject: Created student weenix repository

---
 kernel/main/kmain.c | 200 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 200 insertions(+)
 create mode 100644 kernel/main/kmain.c

(limited to 'kernel/main/kmain.c')

diff --git a/kernel/main/kmain.c b/kernel/main/kmain.c
new file mode 100644
index 0000000..6807328
--- /dev/null
+++ b/kernel/main/kmain.c
@@ -0,0 +1,200 @@
+#include "errno.h"
+#include "globals.h"
+#include "types.h"
+#include <api/exec.h>
+#include <drivers/screen.h>
+#include <drivers/tty/tty.h>
+#include <drivers/tty/vterminal.h>
+#include <main/io.h>
+#include <mm/mm.h>
+#include <mm/slab.h>
+#include <test/kshell/kshell.h>
+#include <util/time.h>
+#include <vm/anon.h>
+#include <vm/shadow.h>
+
+#include "util/debug.h"
+#include "util/gdb.h"
+#include "util/printf.h"
+#include "util/string.h"
+
+#include "main/acpi.h"
+#include "main/apic.h"
+#include "main/inits.h"
+
+#include "drivers/dev.h"
+#include "drivers/pcie.h"
+
+#include "api/syscall.h"
+
+#include "fs/fcntl.h"
+#include "fs/vfs.h"
+#include "fs/vfs_syscall.h"
+#include "fs/vnode.h"
+
+#include "test/driverstest.h"
+
+GDB_DEFINE_HOOK(boot)
+
+GDB_DEFINE_HOOK(initialized)
+
+GDB_DEFINE_HOOK(shutdown)
+
+static void initproc_start();
+
+typedef void (*init_func_t)();
+static init_func_t init_funcs[] = {
+    dbg_init,
+    intr_init,
+    page_init,
+    pt_init,
+    acpi_init,
+    apic_init,
+    core_init,
+    slab_init,
+    pframe_init,
+    pci_init,
+    vga_init,
+#ifdef __VM__
+    anon_init,
+    shadow_init,
+#endif
+    vmmap_init,
+    proc_init,
+    kthread_init,
+#ifdef __DRIVERS__
+    chardev_init,
+    blockdev_init,
+#endif
+    kshell_init,
+    file_init,
+    pipe_init,
+    syscall_init,
+    elf64_init,
+
+    proc_idleproc_init,
+};
+
+/*
+ * Call the init functions (in order!), then run the init process
+ * (initproc_start)
+ */
+void kmain()
+{
+    GDB_CALL_HOOK(boot);
+
+    for (size_t i = 0; i < sizeof(init_funcs) / sizeof(init_funcs[0]); i++)
+        init_funcs[i]();
+
+    initproc_start();
+    panic("\nReturned to kmain()\n");
+}
+
+/*
+ * Make:
+ * 1) /dev/null
+ * 2) /dev/zero
+ * 3) /dev/ttyX for 0 <= X < __NTERMS__
+ * 4) /dev/hdaX for 0 <= X < __NDISKS__
+ */
+static void make_devices()
+{
+    long status = do_mkdir("/dev");
+    KASSERT(!status || status == -EEXIST);
+
+    status = do_mknod("/dev/null", S_IFCHR, MEM_NULL_DEVID);
+    KASSERT(!status || status == -EEXIST);
+    status = do_mknod("/dev/zero", S_IFCHR, MEM_ZERO_DEVID);
+    KASSERT(!status || status == -EEXIST);
+
+    char path[32] = {0};
+    for (long i = 0; i < __NTERMS__; i++)
+    {
+        snprintf(path, sizeof(path), "/dev/tty%ld", i);
+        dbg(DBG_INIT, "Creating tty mknod with path %s\n", path);
+        status = do_mknod(path, S_IFCHR, MKDEVID(TTY_MAJOR, i));
+        KASSERT(!status || status == -EEXIST);
+    }
+
+    for (long i = 0; i < __NDISKS__; i++)
+    {
+        snprintf(path, sizeof(path), "/dev/hda%ld", i);
+        dbg(DBG_INIT, "Creating disk mknod with path %s\n", path);
+        status = do_mknod(path, S_IFBLK, MKDEVID(DISK_MAJOR, i));
+        KASSERT(!status || status == -EEXIST);
+    }
+}
+
+/*
+ * The function executed by the init process. Finish up all initialization now 
+ * that we have a proper thread context.
+ * 
+ * This function will require edits over the course of the project:
+ *
+ * - Before finishing drivers, this is where your tests lie. You can, however, 
+ *  have them in a separate test function which can even be in a separate file 
+ *  (see handout).
+ * 
+ * - After finishing drivers but before starting VM, you should start __NTERMS__
+ *  processes running kshells (see kernel/test/kshell/kshell.c, specifically
+ *  kshell_proc_run). Testing here amounts to defining a new kshell command 
+ *  that runs your tests. 
+ * 
+ * - During and after VM, you should use kernel_execve when starting, you
+ *  will probably want to kernel_execve the program you wish to test directly.
+ *  Eventually, you will want to kernel_execve "/sbin/init" and run your
+ *  tests from the userland shell (by typing in test commands)
+ * 
+ * Note: The init process should wait on all of its children to finish before 
+ * returning from this function (at which point the system will shut down).
+ */
+static void *initproc_run(long arg1, void *arg2)
+{
+#ifdef __VFS__
+    dbg(DBG_INIT, "Initializing VFS...\n");
+    vfs_init();
+    make_devices();
+#endif
+
+    NOT_YET_IMPLEMENTED("PROCS: GDB_DEFINE_HOOK");
+
+    return NULL;
+}
+
+/*
+ * Sets up the initial process and prepares it to run.
+ *
+ * Hints:
+ * Use proc_create() to create the initial process.
+ * Use kthread_create() to create the initial process's only thread.
+ * Make sure the thread is set up to start running initproc_run() (values for
+ *  arg1 and arg2 do not matter, they can be 0 and NULL).
+ * Use sched_make_runnable() to make the thread runnable.
+ * Use context_make_active() with the context of the current core (curcore) 
+ * to start the scheduler.
+ */
+void initproc_start()
+{
+    NOT_YET_IMPLEMENTED("PROCS: GDB_DEFINE_HOOK");
+}
+
+void initproc_finish()
+{
+#ifdef __VFS__
+    if (vfs_shutdown())
+        panic("vfs shutdown FAILED!!\n");
+
+#endif
+
+#ifdef __DRIVERS__
+    screen_print_shutdown();
+#endif
+
+    /* sleep forever */
+    while (1)
+    {
+        __asm__ volatile("cli; hlt;");
+    }
+
+    panic("should not get here");
+}
-- 
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