mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
2afe9d1fd6
This commit got completely out of control.
Added the fork(), getpid(), getppid(), sleep(), usleep() system calls, and
aliases in the Maxsi:: namespace.
Fixed a bug where zero-byte allocation would fail.
Worked on the DescriptorTable class which now works and can fork.
Got rid of some massive print-registers statements and replaced them with
the portable InterruptRegisters::LogRegisters() function.
Removed the SysExecuteOld function and replaced it with Process::Execute().
Rewrote the boot sequence in kernel.cpp such that it now loads the system
idle process 'idle' as PID 0, and the initization process 'init' as PID 1.
Rewrote the SIGINT hack.
Processes now maintain a family-tree structure and keep track of their
threads. PIDs are now allocated using a simple hack. Virtual memory
per-process can now be allocated using a simple hack. Processes can now be
forked. Fixed the Process::Execute function such that it now resets the
stack pointer to where the stack actually is - not just a magic value.
Removed the old and ugly Process::_endcodesection hack.
Rewrote the scheduler into a much cleaner and faster version. Debug code is
now moved to designated functions. The noop kernel-thread has been replaced
by a simple user-space infinite-loop program 'idle'.
The Thread class has been seperated from the Scheduler except in Scheduler-
related code. Thread::{Save,Load}Registers has been improved and has been
moved to $(CPU)/thread.cpp. Threads can now be forked. A new CreateThread
function creates threads properly and portably.
Added a MicrosecondsSinceBoot() function.
Fixed a crucial bug in MemoryManagement::Fork().
Added an 'idle' user-space program that is a noop infinite loop, which is
used by the scheduler when there is nothing to do.
Rewrote the 'init' program such that it now forks off a shell, instead of
becoming the shell.
Added the $$ (current PID) and $PPID (parent PPID) variables to the shell.
293 lines
11 KiB
C++
293 lines
11 KiB
C++
/******************************************************************************
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COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with Sortix. If not, see <http://www.gnu.org/licenses/>.
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kernel.cpp
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A common interface shared by all devices that can be printed text to.
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******************************************************************************/
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#include "platform.h"
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#include <libmaxsi/memory.h>
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#include <libmaxsi/string.h>
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#include <libmaxsi/format.h>
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#include "log.h"
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#include "panic.h"
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#include "descriptor_tables.h"
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#include "time.h"
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#include "keyboard.h"
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#include "multiboot.h"
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#include "memorymanagement.h"
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#include "thread.cpp"
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#include "process.h"
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#include "scheduler.h"
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#include "syscall.h"
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#include "pci.h"
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#include "uart.h"
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#include "serialterminal.h"
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#include "vgaterminal.h"
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#include "elf.h"
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#include "initrd.h"
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#include "vga.h"
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#include "sound.h"
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using namespace Maxsi;
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void* RunApplication(void* Parameter);
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extern "C" size_t stack[4096] = {0};
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extern "C" size_t stackend = 0;
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namespace Sortix
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{
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#ifdef PLATFORM_HTTP
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namespace HTTP { void Init(); }
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#endif
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void DoBSoD()
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{
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#ifdef PLATFORM_SERIAL
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UART::WriteChar(27);
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UART::WriteChar(91);
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UART::WriteChar(48 + 4);
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UART::WriteChar(48 + 4);
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UART::WriteChar(109);
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#endif
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Log::Print(" ");
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Log::Print(" ");
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Log::Print("Windows Boot Manager has experienced a problem. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" Status: 0xc000000f ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" Info: An error occured during transferring execution. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print("You can try to recover the system with the Microsoft Windows System Recovery ");
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Log::Print("Tools. (You might need to restart the system manually). ");
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Log::Print(" ");
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Log::Print("If the problem continues, please contact your system administrator or computer ");
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Log::Print("manufacturer. ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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Log::Print(" ");
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#ifdef JSSORTIX
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JSSortix::Exit();
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#else
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while ( true ) { }
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#endif
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}
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void DoMaxsiLogo()
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{
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Log::Print(" _ \n");
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Log::Print(" / \\ \n");
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Log::Print(" /\\ /\\ / \\ \n");
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Log::Print(" / \\ / \\ | | \n");
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Log::Print(" / \\/ \\ | | \n");
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Log::Print(" | O O \\_______________________ / | \n");
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Log::Print(" | | \n");
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Log::Print(" | \\_______/ / \n");
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Log::Print(" \\ / \n");
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Log::Print(" ------ --------------- ---/ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" / \\ / \\ \n");
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Log::Print(" /_____________\\ /____________\\ \n");
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Log::Print(" \n");
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Log::Print(" BOOTING OPERATING SYSTEM... ");
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}
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void DoWelcome()
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{
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#ifdef BSOD
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DoBSoD();
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#endif
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DoMaxsiLogo();
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}
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extern "C" void KernelInit(unsigned long Magic, multiboot_info_t* BootInfo)
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{
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#ifdef JSSORTIX
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// TODO: Make JSVM multiboot compliant.
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multiboot_info_t MBInfo; BootInfo = &MBInfo;
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multiboot_memory_map_t MBMMap;
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MBMMap.addr = 0x100000;
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MBMMap.len = 0xC00000;
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MBMMap.type = MULTIBOOT_MEMORY_AVAILABLE;
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MBMMap.size = sizeof(MBMMap) - sizeof(MBMMap.size);
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BootInfo->flags = MULTIBOOT_INFO_MEM_MAP;
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BootInfo->mmap_addr = (multiboot_uint32_t) &MBMMap;
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BootInfo->mmap_length = sizeof(MBMMap);
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#endif
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// Initialize system calls.
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Syscall::Init();
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// Initialize the default terminal.
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Maxsi::Format::Callback logcallback;
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void* logpointer;
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#if PLATFORM_SERIAL
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// Initialize the serial driver.
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UART::Init();
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SerialTerminal::Init();
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logcallback = SerialTerminal::Print;
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logpointer = NULL;
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#else
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VGATerminal::Init();
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logcallback = VGATerminal::Print;
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logpointer = NULL;
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#endif
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// Initialize the kernel log.
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Log::Init(logcallback, logpointer);
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// Just a test to see if the color system works! Make the BG red!
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Log::Print("\e[37;41m\e[2J");
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// Display the boot welcome screen.
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DoWelcome();
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#ifndef JSSORTIX
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// Search for PCI devices and load their drivers.
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PCI::Init();
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#endif
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// Initialize the paging and virtual memory.
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Memory::Init(BootInfo);
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uint8_t* initrd = NULL;
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size_t initrdsize = 0;
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#ifndef JSSORTIX
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uint8_t** modules = (uint8_t**) BootInfo->mods_addr;
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for ( uint32_t I = 0; I < BootInfo->mods_count; I++ )
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{
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initrdsize = modules[2*I+1] - modules[2*I+0];
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initrd = modules[2*I+0];
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break;
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}
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#else
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// TODO: UGLY HACK because JSVM doesn't support multiboot yet!
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initrd = (uint8_t*) 0x180000UL;
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initrdsize = 0x80000; // 512 KiB
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#endif
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if ( initrd == NULL ) { PanicF("No initrd provided"); }
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// Initialize the GDT and TSS structures.
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GDT::Init();
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#ifdef PLATFORM_X64
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Log::Print("Halt: CPU X64 cannot boot because interrupts are not yet "
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"supported under 64-bit Sortix.\n");
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Log::Print("Sorry, it simply isn't possible to fully boot Sortix in x64 mode yet.\n");
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Log::Print("X64 may be working when Sortix 0.5 comes out, or try the git master.\n");
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while(true);
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#endif
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// Initialize the interrupt descriptor tables.
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IDT::Init();
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if ( BootInfo == NULL ) { Panic("kernel.cpp: The bootinfo structure was NULL. Are your bootloader multiboot compliant?"); }
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// Initialize the kernel heap.
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Maxsi::Memory::Init();
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// Initialize the keyboard.
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Keyboard::Init();
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// Initialize the VGA driver.
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VGA::Init();
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// Initialize the sound driver.
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Sound::Init();
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// Initialize the process system.
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Process::Init();
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// Initialize the scheduler.
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Scheduler::Init();
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// Set up the initial ram disk.
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InitRD::Init(initrd, initrdsize);
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// Alright, now the system's drivers are loaded and initialized. It is
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// time to load the initial user-space programs and start execution of
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// the actual operating system.
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byte* program;
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size_t programsize;
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// Create an address space for the idle process.
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addr_t idleaddrspace = Memory::Fork();
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if ( !idleaddrspace ) { Panic("could not fork an idle process"); }
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// Create an address space for the initial process.
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addr_t initaddrspace = Memory::Fork();
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if ( !initaddrspace ) { Panic("could not fork an initial process"); }
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// Create the system idle process.
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Process* idle = new Process;
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if ( !idle ) { Panic("could not allocate idle process"); }
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idle->addrspace = idleaddrspace;
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Memory::SwitchAddressSpace(idleaddrspace);
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Scheduler::SetDummyThreadOwner(idle);
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program = InitRD::Open("idle", &programsize);
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if ( program == NULL ) { PanicF("initrd did not contain 'idle'"); }
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addr_t idlestart = ELF::Construct(idle, program, programsize);
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if ( !idlestart ) { Panic("could not construct ELF image for idle process"); }
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Thread* idlethread = CreateThread(idlestart);
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if ( !idlethread ) { Panic("could not create thread for the idle process"); }
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Scheduler::SetIdleThread(idlethread);
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// Create the initial process.
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Process* init = new Process;
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if ( !init ) { Panic("could not allocate init process"); }
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init->addrspace = initaddrspace;
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Memory::SwitchAddressSpace(initaddrspace);
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Scheduler::SetDummyThreadOwner(init);
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program = InitRD::Open("init", &programsize);
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if ( program == NULL ) { PanicF("initrd did not contain 'init'"); }
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addr_t initstart = ELF::Construct(init, program, programsize);
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if ( !initstart ) { Panic("could not construct ELF image for init process"); }
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Thread* initthread = CreateThread(initstart);
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if ( !initthread ) { Panic("could not create thread for the init process"); }
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// Lastly set up the timer driver and we are ready to run the OS.
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Time::Init();
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// Run the OS.
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Scheduler::MainLoop();
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}
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}
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