add vorgabe04
This commit is contained in:
4
c_os/Makefile
Executable file → Normal file
4
c_os/Makefile
Executable file → Normal file
@ -73,8 +73,8 @@ CXX ?= g++
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CFLAGS := $(CFLAGS) -m32 -march=i486 -Wall -fno-stack-protector -nostdlib -I. -g -ffreestanding -fno-pie -fno-pic -mpreferred-stack-boundary=2 -Wno-write-strings -mno-sse -mno-sse2 -mmanual-endbr
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CXXFLAGS := $(CFLAGS) -Wno-non-virtual-dtor -fno-threadsafe-statics -fno-use-cxa-atexit -fno-rtti -fno-exceptions
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BOOT = ../c_boot
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TOOLS = ../c_tools
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BOOT = ../boot
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TOOLS = ../tools
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# BIOS-dev.code:total-tracks:-heads:-sectors:start-track:-head:-sector
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# Default-Werte fuer Boot von Floppy (USB/HD erkennt bootsect.asm selbst):
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BOOTDEVICE = 0:80:2:18:0:0:1
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@ -6,55 +6,50 @@
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* Beschreibung: Treiber für den Tastaturcontroller des PCs. *
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* *
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* Autor: Olaf Spinczyk, TU Dortmund *
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* Modifikationen, Michael Schoettner, 17.8.2016 *
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*****************************************************************************/
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#ifndef __Keyboard_include__
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#define __Keyboard_include__
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#include "devices/Key.h"
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#include "kernel/IOport.h"
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#include "kernel/interrupts/ISR.h"
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class Keyboard {
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class Keyboard : public ISR {
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private:
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Keyboard(const Keyboard& copy); // Verhindere Kopieren
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Keyboard(const Keyboard ©); // Verhindere Kopieren
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unsigned char code; // Byte von Tastatur
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unsigned char prefix; // Prefix von Tastatur
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Key gather; // letzter dekodierter Key
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char leds; // Zustand LEDs
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unsigned char code; // Byte von Tastatur
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unsigned char prefix; // Prefix von Tastatur
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Key gather; // letzter dekodierter Key
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char leds; // Zustand LEDs
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// Benutzte Ports des Tastaturcontrollers
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const IOport ctrl_port; // Status- (R) u. Steuerregister (W)
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const IOport data_port; // Ausgabe- (R) u. Eingabepuffer (W)
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const IOport ctrl_port; // Status- (R) u. Steuerregister (W)
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const IOport data_port; // Ausgabe- (R) u. Eingabepuffer (W)
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// Bits im Statusregister
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enum { outb = 0x01,
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inpb = 0x02,
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auxb = 0x20 };
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enum { outb = 0x01, inpb = 0x02, auxb = 0x20 };
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// Kommandos an die Tastatur
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struct kbd_cmd {
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enum { set_led = 0xed,
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set_speed = 0xf3 };
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enum { set_led = 0xed, set_speed = 0xf3 };
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};
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enum { cpu_reset = 0xfe };
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// Namen der LEDs
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struct led {
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enum { caps_lock = 4,
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num_lock = 2,
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scroll_lock = 1 };
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};
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enum { caps_lock = 4, num_lock = 2, scroll_lock = 1 };
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};
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// Antworten der Tastatur
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struct kbd_reply {
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enum { ack = 0xfa };
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};
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};
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// Konstanten fuer die Tastaturdekodierung
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enum { break_bit = 0x80,
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prefix1 = 0xe0,
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prefix2 = 0xe1 };
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enum { break_bit = 0x80, prefix1 = 0xe0, prefix2 = 0xe1 };
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// Klassenvariablen
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static unsigned char normal_tab[];
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@ -62,28 +57,36 @@ private:
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static unsigned char alt_tab[];
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static unsigned char asc_num_tab[];
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static unsigned char scan_num_tab[];
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// Interpretiert die Make und Break-Codes der Tastatur.
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bool key_decoded();
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bool key_decoded ();
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// Ermittelt anhand von Tabellen den ASCII-Code.
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void get_ascii_code();
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void get_ascii_code ();
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public:
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// Initialisierung der Tastatur.
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Keyboard();
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// Tastaturabfrage (vorerst Polling)
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Key key_hit();
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// Initialisierung der Tastatur.
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Keyboard ();
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// Fuehrt einen Neustart des Rechners durch.
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void reboot();
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// Tastaturabfrage (vorerst Polling)
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Key key_hit ();
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// Einstellen der Wiederholungsrate der Tastatur.
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void set_repeat_rate(int speed, int delay);
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// Fuehrt einen Neustart des Rechners durch.
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void reboot ();
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// Setzt oder loescht die angegebene Leuchtdiode.
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void set_led(char led, bool on);
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// Einstellen der Wiederholungsrate der Tastatur.
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void set_repeat_rate (int speed, int delay);
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// Setzt oder loescht die angegebene Leuchtdiode.
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void set_led (char led, bool on);
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// Aktivierung der Unterbrechungen fuer die Tastatur
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void plugin ();
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// Unterbrechnungsroutine der Tastatur.
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void trigger ();
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};
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#endif
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@ -4,6 +4,8 @@
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Implementierung einer Abstraktion fuer den Prozessor. *
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* Derzeit wird nur angeboten, Interrupts zuzulassen, zu *
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* verbieten oder den Prozessor anzuhalten. *
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* *
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* Autor: Michael Schoettner, 30.7.16 *
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*****************************************************************************/
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@ -18,6 +20,23 @@ private:
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public:
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CPU() {}
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// Erlauben von (Hardware-)Interrupts
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inline void enable_int () {
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asm volatile ( "sti" );
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}
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// Interrupts werden ignoriert/verboten
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inline void disable_int () {
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asm volatile ( "cli" );
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}
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// Prozessor bis zum naechsten Interrupt anhalten
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inline void idle () {
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asm volatile ( "sti;"
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"hlt"
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);
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}
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// Prozessor anhalten
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inline void halt () {
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@ -25,6 +44,7 @@ public:
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"hlt"
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);
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}
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// Time-Stamp-Counter auslesen
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inline unsigned long long int rdtsc() {
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unsigned long long int ret;
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6
c_os/kernel/Globals.cc
Executable file → Normal file
6
c_os/kernel/Globals.cc
Executable file → Normal file
@ -14,7 +14,9 @@ CPU cpu; // CPU-spezifische Funktionen
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PCSPK pcspk; // PC-Lautsprecher
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CGA_Stream kout; // Ausgabe-Strom fuer Kernel
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Keyboard kb; // Tastatur
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IntDispatcher intdis; // Unterbrechungsverteilung
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PIC pic; // Interrupt-Controller
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unsigned int total_mem; // RAM total
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// BumpAllocator allocator;
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// LinkedListAllocator allocator;
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// BumpAllocator allocator;
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// LinkedListAllocator allocator;
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TreeAllocator allocator;
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9
c_os/kernel/Globals.h
Executable file → Normal file
9
c_os/kernel/Globals.h
Executable file → Normal file
@ -15,16 +15,19 @@
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#include "devices/PCSPK.h"
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#include "kernel/allocator/BumpAllocator.h"
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#include "kernel/allocator/LinkedListAllocator.h"
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#include "kernel/allocator/TreeAllocator.h"
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#include "kernel/CPU.h"
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#include "kernel/interrupts/IntDispatcher.h"
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#include "kernel/interrupts/PIC.h"
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extern CPU cpu; // CPU-spezifische Funktionen
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extern PCSPK pcspk; // PC-Lautsprecher
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extern CGA_Stream kout; // Ausgabe-Strom fuer Kernel
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extern Keyboard kb; // Tastatur
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extern IntDispatcher intdis; // Unterbrechungsverteilung
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extern PIC pic; // Interrupt-Controller
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extern unsigned int total_mem; // RAM total
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// extern BumpAllocator allocator;
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// extern LinkedListAllocator allocator;
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// extern BumpAllocator allocator;
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// extern LinkedListAllocator allocator;
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extern TreeAllocator allocator;
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#endif
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@ -7,6 +7,7 @@
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#define BASIC_ALIGN 8
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// NOTE: I added this file
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// NOTE: I can't imagine that this is very fast with all the tree logic?
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typedef struct list_block {
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// Doubly linked list for every block
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@ -15,11 +16,10 @@ typedef struct list_block {
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struct list_block* previous;
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} list_block_t;
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// Format eines freien Blocks
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// The free blocks are organized in a red-black tree to enable fast insertion with best-fit strategy.
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// To allow fast merging of freed blocks every block is part of a doubly linked list.
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// Because the red-black tree only contains the free blocks, the memory overhead comes
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// down to only 4 + 4 + 4 Bytes for the allocated flag, next and previous pointers.
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// down to 4 + 4 + 4 Bytes for the allocated flag, next and previous pointers.
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// The size can be calculated by using the next pointer so it doesn't have to be stored.
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typedef struct tree_block {
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// Doubly linked list for every block
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27
c_os/kernel/interrupts/ISR.h
Executable file
27
c_os/kernel/interrupts/ISR.h
Executable file
@ -0,0 +1,27 @@
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/*****************************************************************************
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* *
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* I S R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Interrupt Service Routine. Jeweils ein Objekt pro ISR. *
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* Erlaubt es einen Kontext mit Variablen fuer die Unter- *
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* brechungsroutine bereitzustellen. *
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* *
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* Autor: Michael Schoettner, 06.04.20 *
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*****************************************************************************/
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#ifndef __ISR_include__
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#define __ISR_include__
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class ISR {
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private:
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ISR (const ISR ©); // Verhindere Kopieren
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public:
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ISR () {}
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// Unterbrechungsbehandlungsroutine
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virtual void trigger () = 0;
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};
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#endif
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@ -8,11 +8,78 @@
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* Interrupts an. Wenn eine Interrupt Service Routine *
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* registriert ist, wird diese aufgerufen. *
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* *
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* Autor: Michael Schoettner, 30.7.16 *
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* Autor: Michael Schoettner, 31.8.2016 *
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*****************************************************************************/
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#include "kernel/CPU.h"
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#include "kernel/Globals.h"
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#include "kernel/interrupts/IntDispatcher.h"
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extern "C" void int_disp(unsigned int slot);
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// Low-Level Interrupt-Behandlung. (Die Funktion wird spaeter noch erweitert)
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void int_disp(unsigned int slot) {
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extern "C" void int_disp (unsigned int slot);
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/*****************************************************************************
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* Prozedur: int_disp *
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*---------------------------------------------------------------------------*
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* Beschreibung: Low-Level Interrupt-Behandlung. *
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* Diese Funktion ist in der IDT fuer alle Eintraege einge- *
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* tragen. Dies geschieht bereits im Bootloader. *
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* Sie wird also fuer alle Interrupts aufgerufen. Von hier *
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* aus sollen die passenden ISR-Routinen der Treiber-Objekte*
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* mithilfe von 'IntDispatcher::report' aufgerufen werden. *
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* Parameter: *
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* vector: Vektor-Nummer der Unterbrechung *
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*****************************************************************************/
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void int_disp (unsigned int vector) {
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/* hier muss Code eingefuegt werden */
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kout << "Ein Interrupt ist aufgetreten" << slot << endl;
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}
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/*****************************************************************************
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* Konstruktor: IntDispatcher::IntDispatcher *
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*---------------------------------------------------------------------------*
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* Beschreibung: Initialisierung der ISR map mit einer Default-ISR. *
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*****************************************************************************/
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IntDispatcher::IntDispatcher () {
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for (unsigned int slot=0; slot<size; slot++)
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map[slot] = 0;
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}
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/*****************************************************************************
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* Methode: IntDispatcher::assign *
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*---------------------------------------------------------------------------*
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* Beschreibung: Registrierung einer ISR. *
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* *
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* Parameter: *
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* vector: Vektor-Nummer der Unterbrechung *
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* isr: ISR die registriert werden soll *
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* *
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* Rueckgabewert: 0 = Erfolg, -1 = Fehler *
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*****************************************************************************/
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int IntDispatcher::assign (unsigned int vector, ISR& isr) {
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/* hier muss Code eingefuegt werden */
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}
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/*****************************************************************************
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* Methode: IntDispatcher::report *
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*---------------------------------------------------------------------------*
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* Beschreibung: Eingetragene ISR ausfuehren. *
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* *
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* Parameter: *
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* vector: Gesuchtes ISR-Objekt fuer diese Vektor-Nummer. *
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* *
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* Rueckgabewert: 0 = ISR wurde aufgerufen, -1 = unbekannte Vektor-Nummer *
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*****************************************************************************/
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int IntDispatcher::report (unsigned int vector) {
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/* hier muss Code eingefuegt werden */
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}
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|
45
c_os/kernel/interrupts/IntDispatcher.h
Executable file
45
c_os/kernel/interrupts/IntDispatcher.h
Executable file
@ -0,0 +1,45 @@
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/*****************************************************************************
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* *
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* I N T D I S P A T C H E R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Zentrale Unterbrechungsbehandlungsroutine des Systems. *
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* Der Parameter gibt die Nummer des aufgetretenen *
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* Interrupts an. Wenn eine Interrupt Service Routine (ISR) *
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* in der Map registriert ist, so wird diese aufgerufen. *
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* *
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* Autor: Michael Schoettner, 30.7.16 *
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*****************************************************************************/
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#ifndef __IntDispatcher_include__
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#define __IntDispatcher_include__
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#include "kernel/ISR.h"
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class IntDispatcher {
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private:
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IntDispatcher(const IntDispatcher ©); // Verhindere Kopieren
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|
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enum { size = 256 };
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ISR* map[size];
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|
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public:
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// Vektor-Nummern
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enum {
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timer = 32,
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keyboard = 33
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};
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// Initialisierung der ISR map mit einer Default-ISR.
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IntDispatcher ();
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// Registrierung einer ISR. (Rueckgabewert: 0 = Erfolg, -1 = Fehler)
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int assign (unsigned int vector, ISR& gate);
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|
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// ISR fuer 'vector' ausfuehren
|
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int report (unsigned int vector);
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|
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};
|
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|
||||
#endif
|
73
c_os/kernel/interrupts/PIC.cc
Executable file
73
c_os/kernel/interrupts/PIC.cc
Executable file
@ -0,0 +1,73 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* P I C *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Mit Hilfe des PICs koennen Hardware-Interrupts (IRQs) *
|
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* einzeln zugelassen oder unterdrueckt werden. Auf diese *
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||||
* Weise wird also bestimmt, ob die Unterbrechung eines *
|
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* Geraetes ueberhaupt an den Prozessor weitergegeben wird. *
|
||||
* Selbst dann erfolgt eine Aktivierung der Unterbrechungs- *
|
||||
* routine nur, wenn der Prozessor bereit ist, auf Unter- *
|
||||
* brechungen zu reagieren. Dies kann mit Hilfe der Klasse *
|
||||
* CPU festgelegt werden. *
|
||||
* *
|
||||
* Autor: Olaf Spinczyk, TU Dortmund *
|
||||
*****************************************************************************/
|
||||
|
||||
#include "kernel/PIC.h"
|
||||
#include "kernel/IOport.h"
|
||||
|
||||
|
||||
static IOport IMR1 (0x21); // interrupt mask register von PIC 1
|
||||
static IOport IMR2 (0xa1); // interrupt mask register von PIC 2
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
* Methode: PIC::allow *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Sorgt dafuer, dass der uebergebene IRQ ab sofort durch *
|
||||
* den PIC an den Prozessor weitergereicht wird. Um eine *
|
||||
* Unterbrechungsbehandlung zu ermoeglichen, muss *
|
||||
* zusaetzlich CPU::enable_int() aufgerufen werden. *
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||||
* *
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||||
* Parameter: *
|
||||
* irq: IRQ der erlaubt werden soll *
|
||||
*****************************************************************************/
|
||||
void PIC::allow (int irq) {
|
||||
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
* Methode: PIC::forbid *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Unterdrueckt mit Hilfe des PICs einen bestimmten IRQ. *
|
||||
* *
|
||||
* Parameter: *
|
||||
* interrupt: IRQ der maskiert werden soll *
|
||||
*****************************************************************************/
|
||||
void PIC::forbid (int irq) {
|
||||
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*****************************************************************************
|
||||
* Methode: PIC::status *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Liefert den aktuellen Zustand des Maskierbits eines *
|
||||
* bestimmten IRQs. *
|
||||
* *
|
||||
* Parameter: *
|
||||
* irq: IRQ dessen Status erfragt werden soll *
|
||||
*****************************************************************************/
|
||||
bool PIC::status (int irq) {
|
||||
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
}
|
||||
|
44
c_os/kernel/interrupts/PIC.h
Executable file
44
c_os/kernel/interrupts/PIC.h
Executable file
@ -0,0 +1,44 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* P I C *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Mit Hilfe des PICs koennen Hardware-Interrupts (IRQs) *
|
||||
* einzeln zugelassen oder unterdrueckt werden. Auf diese *
|
||||
* Weise wird also bestimmt, ob die Unterbrechung eines *
|
||||
* Geraetes ueberhaupt an den Prozessor weitergegeben wird. *
|
||||
* Selbst dann erfolgt eine Aktivierung der Unterbrechungs- *
|
||||
* routine nur, wenn der Prozessor bereit ist, auf Unter- *
|
||||
* brechungen zu reagieren. Dies kann mit Hilfe der Klasse *
|
||||
* CPU festgelegt werden. *
|
||||
* *
|
||||
* Autor: Olaf Spinczyk, TU Dortmund *
|
||||
*****************************************************************************/
|
||||
#ifndef __PIC_include__
|
||||
#define __PIC_include__
|
||||
|
||||
class PIC {
|
||||
|
||||
private:
|
||||
PIC(const PIC ©); // Verhindere Kopieren
|
||||
public:
|
||||
PIC() {}
|
||||
|
||||
public:
|
||||
// IRQ-Nummern von Geraeten
|
||||
enum {
|
||||
timer = 0, // Programmable Interrupt Timer (PIT)
|
||||
keyboard = 1 // Tastatur
|
||||
};
|
||||
|
||||
// Freischalten der Weiterleitung eines IRQs durch den PIC an die CPU
|
||||
void allow (int irq);
|
||||
|
||||
// Unterdruecken der Weiterleitung eines IRQs durch den PIC an die CPU
|
||||
void forbid (int irq);
|
||||
|
||||
// Abfragen, ob die Weiterleitung fuer einen bestimmten IRQ unterdrueckt ist
|
||||
bool status (int interrupt_device);
|
||||
};
|
||||
|
||||
#endif
|
0
c_os/lib/MyStdLib.cc
Normal file → Executable file
0
c_os/lib/MyStdLib.cc
Normal file → Executable file
13
c_os/main.cc
13
c_os/main.cc
@ -47,9 +47,18 @@ int main() {
|
||||
// text_demo();
|
||||
// sound_demo();
|
||||
// keyboard_demo();
|
||||
heap_demo();
|
||||
// heap_demo();
|
||||
|
||||
scroll_mode();
|
||||
// Tastatur-Unterbrechungsroutine 'einstoepseln'
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
// Interrupts erlauben (Tastatur)
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
key_irq_demo();
|
||||
|
||||
// TODO: Use interrupts
|
||||
// scroll_mode();
|
||||
|
||||
while (1) {};
|
||||
return 0;
|
||||
|
18
c_os/user/KeyIRQDemo.cc
Normal file
18
c_os/user/KeyIRQDemo.cc
Normal file
@ -0,0 +1,18 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* K E Y I R Q D E M O *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Demo zu Interrupts. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, HHU, 26.10.2018 *
|
||||
*****************************************************************************/
|
||||
|
||||
#include "kernel/Globals.h"
|
||||
|
||||
|
||||
void key_irq_demo() {
|
||||
|
||||
/* Hier muss Code eingefuegt werden */
|
||||
|
||||
}
|
16
c_os/user/KeyIRQDemo.h
Normal file
16
c_os/user/KeyIRQDemo.h
Normal file
@ -0,0 +1,16 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* K E Y I R Q D E M O *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Demo zu Interrupts. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, HHU, 26.10.2018 *
|
||||
*****************************************************************************/
|
||||
|
||||
#ifndef __KeyIRQDemo_include__
|
||||
#define __KeyIRQDemo_include__
|
||||
|
||||
void key_irq_demo();
|
||||
|
||||
#endif
|
Reference in New Issue
Block a user