/*****************************************************************************************
Copyright (c) 2002 The UbixOS Project
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of
conditions, the following disclaimer and the list of authors. Redistributions in binary
form must reproduce the above copyright notice, this list of conditions, the following
disclaimer and the list of authors in the documentation and/or other materials provided
with the distribution. Neither the name of the UbixOS Project nor the names of its
contributors may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$Log$
Revision 1.8 2004/04/28 21:10:40 reddawg
Lots Of changes to make it work with existing os
Revision 1.7 2004/04/26 22:27:36 reddawg
Now mounts our harddrive I need to either impliment fstab or do something similar
Revision 1.6 2004/04/25 04:35:50 reddawg
Minor bug fixes to set default partition information
Revision 1.5 2004/04/20 00:53:16 reddawg
Works
Revision 1.4 2004/04/19 21:32:14 reddawg
Fixes:
ne2k:
we now have allocBuffer() and getBuffer() - alloc gets an avail buffer on the
memory ring for the nic and get will fetch the oldest buffer on there
Revision 1.3 2004/04/15 12:53:08 reddawg
There Fixed
Revision 1.2 2004/04/15 12:38:25 reddawg
Fixed to compile
Revision 1.1.1.1 2004/04/15 12:06:45 reddawg
UbixOS v1.0
Revision 1.107 2004/04/13 16:36:33 reddawg
Changed our copyright, it is all now under a BSD-Style license
$Id$
*****************************************************************************************/
#include <sys/gdt.h>
#include <sys/video.h>
#include <sys/idt.h>
#include <sys/tss.h>
#include <vmm/vmm.h>
#include <ubixos/vitals.h>
#include <ubixos/exec.h>
#include <ubixos/kpanic.h>
#include <ubixos/sched.h>
#include <ubixos/idletask.h>
#include <ubixos/time.h>
#include <vfs/mount.h>
#include <lib/kprintf.h>
#include <lib/kmalloc.h>
#include <lib/bioscall.h>
#include <isa/8259.h>
#include <isa/pit.h>
#include <isa/fdc.h>
#include <isa/atkbd.h>
#include <isa/ne2k.h>
#include <vfs/vfs.h>
#include <ubixfs/ubixfs.h>
#include <pci/pci.h>
#include <pci/hd.h>
#include <sde/sde.h>
#include <devfs/devfs.h>
#include <net/net.h>
char kernelStack[8192]; // Stack Space For Our Kernel
descriptorTable(GDT,8) {
{dummy:0},
standardDescriptor(0x0, 0xFFFFF, (dCode + dRead + dBig + dBiglim)),
standardDescriptor(0x0, 0xFFFFF, (dData + dWrite + dBig + dBiglim)),
standardDescriptor(0x0, 0xFFFFF, (dLdt)),
standardDescriptor(0x4200, (sizeof(struct tssStruct)), (dTss)),
standardDescriptor(0x0, 0xFFFFF, (dCode + dWrite + dBig + dBiglim + dDpl3)),
standardDescriptor(0x0, 0xFFFFF, (dData + dWrite + dBig + dBiglim + dDpl3)),
standardDescriptor(0x4200, (sizeof(struct tssStruct)), (dTss)),
};
struct {
unsigned short limit __attribute__ ((packed));
union descriptorTableunion *gdt __attribute__ ((packed));
} loadGdt = { (8 * sizeof(union descriptorTableunion) - 1), GDT };
int main() {
// Clear the screen so we have a nice pretty starting place for the os to spew its info
clearScreen();
// Initialize the kernels vital systems
// This initialization is for the systems memory and memory map for the os to allocate with
if (vmmInit() != 0x0) {
kpanic("Error: Initializing VMM Subsystem.\n");
}
// This initialization is for the systems vital information
if (initVitals() != 0x0) {
kpanic("Error: Initializing vitals\n");
}
// This initialization is for the VFS(Virtual file system) layer
if (vfsInit() != 0x0) {
kpanic("Error: Initializing VFS\n");
}
if (devFSEnable() != 0x0) {
kpanic("Error: Enabling devFS\n");
}
// This initialization is for the systems PICs for our IRQ handling
if (init8259() != 0x0) {
kpanic("Error: Initializing 8259\n");
}
// This initialization is for the systems IDT
if (idtInit() != 0x0) {
kpanic("Error: Initializing IDT\n");
}
// This initialization is for the operating systems scheduler
if (schedInit() != 0x0) {
kpanic("Error: Initializing: Scheduler\n");
}
// This initialization is for the systems timer
if (pitInit(1000) != 0x0) {
kpanic("Error: Initializing PIT\n");
}
// This initialization is for the keyboard
if (keyboardInit() != 0x0) {
kpanic("Error: Initializing Keyboard\n");
}
/*
if (pciInit() != 0x0) {
kpanic("Error: Initializing PCI\n");
}
*/
if (timeInit() != 0x0) {
kpanic("Error: Initializing TIME\n");
}
if (ne2kInit(0x240) != 0x0) {
kpanic("Error: Initializing NE2000\n");
}
enableUbixFS();
fdcInit();
initHardDisk();
if (mount(0x0,0x0,0x0,"sys","rw") != 0x0) {
kprintf("Problem Mounting sys Mount Point\n");
}
if (mount(0x0,0x1,0x0,"tmp","rw") != 0x0) {
kprintf("Problem Mounting tmp Mount Point\n");
}
/*
if (mount(0x1,0x1,0x0,0x0,"sys","rw") != 0x0) {
kprintf("Problem Mounting HD Mount Point\n");
}
*/
kprintf("Free Pages: [%i]\n",freePages);
kprintf("MemoryMap: [0x%X]\n",vmmMemoryMap);
kprintf("Starting Os\n");
netInit();
execThread(idleTask,(uInt32)(kmalloc(0x2000,sysID)+0x2000),0x0,"Idle Thread");
//execFile("init@sys",0x0,0x0,0x0);
execFile("shell@sys",0x0,0x0,0x0);
irqEnable(0x0);
sched();
return(0x0);
}
/************************************************************************
Function: _start();
Description: This Is The Kernels Main Entry Point From Here We Must
Re-Setup Our GDT And Set All Registers To Their Default
Values So We Are Sure Of No Error When The OS Boots Up Also
We Have To Quickly Set Up Our Interrupt Table Because We Do
Not Have Any Fault Protection Yet
Notes:
02/17/03 - I'm Unhappy With The Infinite Loop I Decided To Do If The Call
To Main Returns I Think I Shall Change It To A Kernel Panic
At A Later Date Then Reboot The Machine
************************************************************************/
void _start(void) {
asm ("pushl $2; popf");
asm volatile(
"lgdtl (loadGdt) \n"
"movw $0x10,%%ax \n" // Select Ring 0 Data Segment
"movw %%ax,%%ds \n" // Set Default Segment
"movw %%ax,%%es \n" // "" ""
"movw %%ax,%%fs \n" // "" ""
"movw %%ax,%%gs \n" // "" ""
"movw %%ax,%%ss \n" // "" ""
"movl $0x2000,%%esp \n" // Set Default Stack Pointer Its The End Of First Page
"movl $0x2000,%%ebp \n"
"mov $0x18,%%ax \n" // Set Up Dummy LDT
"lldt %%ax \n" // Load The Dummy LDT
"mov $0x20,%%ax \n" // Set Up Dummy TSS
"ltr %%ax \n" // Load The Dummy TSS
"ljmp $0x08,$next \n"
"nop\n"
"nop\n"
"next:\n"
:
: "r" (GDT), "p" (kernelStack+8192)
: "%eax"
);
main();
kpanic("We Should Not Get This Far\n");
}
/***
END
***/
