system/kernel/ke/start.c

   1 /*
   2 Copyright (C) 2008  Mathias Gottschlag
   3
   4 Permission is hereby granted, free of charge, to any person obtaining a copy of
   5 this software and associated documentation files (the "Software"), to deal in the
   6 Software without restriction, including without limitation the rights to use,
   7 copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
   8 Software, and to permit persons to whom the Software is furnished to do so,
   9 subject to the following conditions:
  10
  11 The above copyright notice and this permission notice shall be included in all
  12 copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  15 INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  17 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  18 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  19 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20 */
  21
  22 #include "ke/debug.h"
  23 #include "ke/gdt.h"
  24 #include "ke/apic.h"
  25 #include "ke/multiboot.h"
  26 #include "ke/interrupts.h"
  27 #include "ke/smp.h"
  28 #include "ke/timer.h"
  29 #include "ke/process.h"
  30 #include "mm/memory.h"
  31 #include "ke/module.h"
  32 #include "fs/fs.h"
  33 #include "fs/devfs.h"
  34 #include <string.h>
  35 #include <stdio.h>
  36
  37 static MultibootInfo *mbinfo;
  38
  39 void kernel_phys_start();
  40 void kernel_phys_end();
  41
  42 static void keInit2(void)
  43 {
  44         keInitKernelSymbols(mbinfo);
  45         fsInit();
  46         fsInitDevFS();
  47         FsFileSystemDriver *devfs = fsGetDriver("devfs");
  48         if (!devfs)
  49         {
  50                 // TODO: Panic
  51                 kePrint("devfs not available.\n");
  52                 while (1);
  53         }
  54         fsMount(devfs, "/dev/", 0, 0);
  55         keInitModules(mbinfo);
  56         kePrint("Opening test file.\n");
  57         FsFileHandle *testfile = fsOpen("/dev/cdrom0", 0);
  58         if (!testfile)
  59         {
  60                 kePrint("Could not open test file.\n");
  61         }
  62         else
  63         {
  64                 unsigned char test[512];
  65                 fsSeek(testfile, 0x8000, 0);
  66                 int read = fsRead(testfile, test, 512, 1);
  67                 kePrint("Read %d bytes.\n", read);
  68                 if (read != -1)
  69                 {
  70                         uint32_t i;
  71                         for (i = 0; i < 512; i++)
  72                         {
  73                                 char buffer[2];
  74                                 snprintf(buffer, 2, "%c", test[i]);
  75                                 kePrint("%s", buffer);
  76                         }
  77                         kePrint("\n");
  78                 }
  79
  80                 kePrint("Closing test file.\n");
  81                 fsClose(testfile);
  82         }
  83
  84         // Map CDROM
  85         FsFileSystemDriver *iso9660 = fsGetDriver("iso9660");
  86         if (!iso9660)
  87         {
  88                 // TODO: Panic
  89                 kePrint("iso9660 not available.\n");
  90                 while (1);
  91         }
  92         fsMount(iso9660, "/", "/dev/cdrom0", 0);
  93
  94         kePrint("Sleep (500)\n");
  95         keSleep(500);
  96         kePrint("Sleep (1000)\n");
  97         keSleep(1000);
  98         kePrint("Done.\n");
  99
 100         while (1);
 101 }
 102
 103 void keInit(int magic, MultibootInfo *info)
 104 {
 105         char *vidmem = (char*)0xC00B8000;
 106         memset(vidmem, 0, 160 * 25);
 107
 108         kePrintInit();
 109         keInitPIC();
 110         if (!CHECK_FLAG(info->flags, 5))
 111         {
 112                 kePrint("Error: no symbols available.\n");
 113                 while (1);
 114         }
 115
 116         uintptr_t kernel_begin = ((uintptr_t)kernel_phys_start & ~0xFFF) + 0xC0000000;
 117         uintptr_t kernel_end = (((uintptr_t)kernel_phys_end + 4095) & ~0xFFF) + 0xC0000000;
 118         mmInitMemoryManager(info, kernel_begin, kernel_end);
 119         // Remap multiboot struct
 120         uintptr_t info_addr = mmFindFreeKernelPages(MM_MAX_KERNEL_PAGE,
 121                 MM_MIN_KERNEL_PAGE, 0, 0x1000);
 122         mmMapKernelMemory((uintptr_t)info & ~0xFFF, info_addr,
 123                 MM_MAP_READ | MM_MAP_WRITE);
 124         info_addr += (uintptr_t)info & 0xFFF;
 125         info = (void*)info_addr;
 126         mbinfo = info;
 127
 128         keAPICInit();
 129         keInitSMP();
 130         keInstallGDT();
 131         keInitTimer(100);
 132         keInitProcessManager();
 133
 134         // Test process
 135         KeProcess *testprocess = keCreateProcess();
 136         keLockSpinlock(mmGetMemoryLock());
 137         uintptr_t progpaddr = mmAllocPhysicalMemory(0, 0, 0x1000);
 138         uintptr_t progkerneladdr = mmFindFreeKernelPages(MM_MAX_KERNEL_PAGE,
 139                 MM_MIN_KERNEL_PAGE, 0, 0x1000);
 140         mmMapKernelMemory(progpaddr, progkerneladdr, MM_MAP_READ | MM_MAP_WRITE);
 141         ((uint8_t*)progkerneladdr)[0] = 0xEB;
 142         ((uint8_t*)progkerneladdr)[1] = 0xFE;
 143         mmMapKernelMemory(0, progkerneladdr, 0);
 144         mmMapMemory(&testprocess->memory, progpaddr, 0x400000, MM_MAP_READ | MM_MAP_EXECUTE);
 145         keUnlockSpinlock(mmGetMemoryLock());
 146         KeThread *testthread = keCreateThread(testprocess, 0x400000, 0);
 147         keUnlockSpinlock(&testprocess->lock);
 148
 149         // Initial kernel thread
 150         KeThread *initthread = keCreateKernelThread((uintptr_t)keInit2, 0);
 151
 152         // Start kernel
 153         keInstallTimer();
 154         keStartAPs();
 155         asm("sti");
 156
 157         while (1) asm("hlt");
 158 }
 159