add vorgabe03 + initial bump allocator
This commit is contained in:
0
.gitignore
vendored
Executable file → Normal file
0
.gitignore
vendored
Executable file → Normal file
@ -62,10 +62,10 @@ VERBOSE = @
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ASMOBJFORMAT = elf
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OBJDIR = ./build
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DEPDIR = ./dep
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DRIVE_FD = /dev/sdb
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DRIVE_FD = /media/student/LUCAS
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# ACHTUNG: ein falsch angegebenes Laufwerk kann dazu fuehren, dass Daten auf dem
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# spezifizierten Laufwerk verloren gehen! Nicht mit root-Rechten ausfuehren!
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DRIVE_HD = /dev/sdb
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DRIVE_HD = /media/student/LUCAS
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DELETE = rm
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ASM = nasm
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CC ?= gcc
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83
c_os/kernel/Allocator.cc
Normal file
83
c_os/kernel/Allocator.cc
Normal file
@ -0,0 +1,83 @@
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/*****************************************************************************
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* *
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* A L L O C A T O R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Einfache Speicherverwaltung. 'new' und 'delete' werden *
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* durch Ueberladen der entsprechenden Operatoren *
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* realisiert. *
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* *
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* Memory-Laylout *
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* *
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* boot.asm *
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* 0x07c0: Bootsector vom BIOS geladen *
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* 0x0060: Boot-Code verschiebt sich hier hin *
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* 0x9000: Setup-Code (max. 64K inkl. Stack) vom *
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* Bootsector-Code geladen *
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* setup.asm *
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* 0x1000: System-Code (max. 512K) geladen *
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* System-Code *
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* 0x100000: System-Code, kopiert nach Umschalten in *
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* den Protected Mode kopiert (GRUB kann nur *
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* an Adressen >1M laden) *
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* Globale Variablen: Direkt nach dem Code liegen die globalen *
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* Variablen. *
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* Heap: *
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* 0x300000: Start-Adresse der Heap-Verwaltung *
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* 0x400000: Letzte Adresse des Heaps *
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* *
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* Achtung: Benötigt einen PC mit mindestens 8 MB RAM! *
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* *
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* Autor: Michael Schoettner, HHU, 1.3.2022 *
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*****************************************************************************/
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#include <stddef.h>
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#include "kernel/Globals.h"
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#include "kernel/Allocator.h"
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#define MEM_SIZE_DEF 8*1024*102 // Groesse des Speichers = 8 MB
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#define HEAP_START 0x300000 // Startadresse des Heaps
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#define HEAP_SIZE 1024*1024 // Default-Groesse des Heaps, falls
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// nicht über das BIOS ermittelbar
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/*****************************************************************************
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* Konstruktor: Allocator::Allocator *
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*****************************************************************************/
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Allocator::Allocator() {
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// Groesse des Hauptspeichers (kann über das BIOS abgefragt werden,
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// aber sehr umstaendlich, daher hier fest eingetragen
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total_mem = MEM_SIZE_DEF;
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heap_start = HEAP_START;
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heap_end = HEAP_START + HEAP_SIZE;
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heap_size = HEAP_SIZE;
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initialized = 1;
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}
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/*****************************************************************************
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* Nachfolgend sind die Operatoren von C++, die wir hier ueberschreiben *
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* und entsprechend 'mm_alloc' und 'mm_free' aufrufen. *
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*****************************************************************************/
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void* operator new ( size_t size ) {
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return allocator.alloc(size);
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}
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void* operator new[]( size_t count ) {
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return allocator.alloc(count);
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}
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void operator delete ( void* ptr ) {
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allocator.free(ptr);
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}
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void operator delete[] ( void* ptr ) {
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allocator.free(ptr);
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}
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void operator delete(void*ptr, unsigned int sz) {
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allocator.free(ptr);
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}
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62
c_os/kernel/Allocator.h
Normal file
62
c_os/kernel/Allocator.h
Normal file
@ -0,0 +1,62 @@
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/*****************************************************************************
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* *
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* A L L O C A T O R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Einfache Speicherverwaltung. 'new' und 'delete' werden *
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* durch Ueberladen der entsprechenden Operatoren *
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* realisiert. *
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* *
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* Memory-Laylout *
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* *
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* boot.asm *
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* 0x07c0: Bootsector vom BIOS geladen *
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* 0x0060: Boot-Code verschiebt sich hier hin *
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* 0x9000: Setup-Code (max. 64K inkl. Stack) vom *
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* Bootsector-Code geladen *
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* setup.asm *
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* 0x1000: System-Code (max. 512K) geladen *
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* System-Code *
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* 0x100000: System-Code, kopiert nach Umschalten in *
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* den Protected Mode kopiert (GRUB kann nur *
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* an Adressen >1M laden) *
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* Globale Variablen: Direkt nach dem Code liegen die globalen *
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* Variablen. *
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* Heap: *
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* 0x300000: Start-Adresse der Heap-Verwaltung *
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* 0x400000: Letzte Adresse des Heaps *
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* *
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* Achtung: Benötigt einen PC mit mindestens 4 MB RAM! *
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* *
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* Autor: Michael Schoettner, HHU, 13.6.2020 *
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*****************************************************************************/
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#ifndef __Allocator_include__
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#define __Allocator_include__
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// NOTE: I added this
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typedef struct {
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unsigned int length;
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bool free;
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unsigned char* next;
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} mem_block_header_t;
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class Allocator {
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private:
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Allocator(Allocator& copy); // Verhindere Kopieren
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public:
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unsigned int heap_start;
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unsigned int heap_end;
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unsigned int heap_size;
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unsigned int initialized;
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Allocator();
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virtual void init() = 0;
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virtual void dump_free_memory() = 0;
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virtual void* alloc(unsigned int req_size) = 0;
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virtual void free(void* ptr) = 0;
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};
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#endif
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@ -10,19 +10,25 @@
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#ifndef __CPU_include__
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#define __CPU_include__
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class CPU {
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class CPU {
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private:
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CPU(const CPU& copy); // Verhindere Kopieren
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CPU(const CPU ©); // Verhindere Kopieren
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public:
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CPU() {}
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// Prozessor anhalten
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inline void halt () {
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asm volatile ( "cli;"
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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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asm volatile("rdtsc"
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: "=A"(ret));
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unsigned long long int ret;
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asm volatile ( "rdtsc" : "=A"(ret) );
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return ret;
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}
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};
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@ -10,7 +10,10 @@
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#include "kernel/Globals.h"
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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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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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unsigned int total_mem; // RAM total
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BumpAllocator allocator;
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//LinkedListAllocator allocator;
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@ -13,11 +13,15 @@
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#include "devices/CGA_Stream.h"
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#include "devices/Keyboard.h"
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#include "devices/PCSPK.h"
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#include "kernel/allocator/BumpAllocator.h"
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#include "kernel/CPU.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 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 unsigned int total_mem; // RAM total
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extern BumpAllocator allocator;
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//extern LinkedListAllocator allocator;
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#endif
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80
c_os/kernel/allocator/BumpAllocator.cc
Normal file
80
c_os/kernel/allocator/BumpAllocator.cc
Normal file
@ -0,0 +1,80 @@
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/*****************************************************************************
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* *
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* B U M P A L L O C A T O R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Eine sehr einfache Heap-Verwaltung, welche freigegebenen *
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* Speicher nicht mehr nutzen kann. *
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* *
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* Autor: Michael Schoettner, HHU, 3.3.2022 *
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*****************************************************************************/
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#include "kernel/Globals.h"
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#include <stddef.h>
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// #include "kernel/allocator/LinkedListAllocator.h"
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/*****************************************************************************
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* Methode: BumpAllocator::init *
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*---------------------------------------------------------------------------*
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* Beschreibung: BumpAllokartor intitialisieren. *
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*****************************************************************************/
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void BumpAllocator::init() {
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/* Hier muess Code eingefuegt werden */
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this->heap_start = 3 * 1024 * 1024; // 3 MB
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this->heap_size = 1 * 1024 * 1024; // 1 MB
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this->heap_end = this->heap_start + this->heap_size; // 4 MB
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this->allocations = 0;
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this->next = (unsigned char*)heap_start;
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this->initialized = true;
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}
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/*****************************************************************************
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* Methode: BumpAllocator::dump_free_memory *
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*---------------------------------------------------------------------------*
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* Beschreibung: Ausgabe der Freispeicherinfos. Zu Debuggingzwecken. *
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*****************************************************************************/
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void BumpAllocator::dump_free_memory() {
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/* Hier muess Code eingefuegt werden */
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kout << "Freier Speicher:" << endl
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<< " Heap Start: " << this->heap_start << ", Heap End: " << this->heap_end << endl
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<< " Next: " << this->next << ", Allocations: " << this->allocations << endl;
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}
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/*****************************************************************************
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* Methode: BumpAllocator::alloc *
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*---------------------------------------------------------------------------*
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* Beschreibung: Einen neuen Speicherblock allozieren. *
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*****************************************************************************/
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void* BumpAllocator::alloc(unsigned int req_size) {
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/* Hier muess Code eingefuegt werden */
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if (!this->initialized) {
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kout << "Allocator not initialized :(" << endl;
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return NULL;
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}
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if (req_size > this->heap_end - (unsigned int)this->next) {
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kout << "More memory requested than available :(" << endl;
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return NULL;
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}
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void* allocated = this->next;
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this->next = this->next + req_size;
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this->allocations = this->allocations + 1;
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return allocated;
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}
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/*****************************************************************************
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* Methode: BumpAllocator::free *
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*---------------------------------------------------------------------------*
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* Beschreibung: Nicht implementiert. *
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*****************************************************************************/
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void BumpAllocator::free(void* ptr) {
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kout << " mm_free: ptr= " << hex << (unsigned int)ptr << ", not supported" << endl;
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}
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34
c_os/kernel/allocator/BumpAllocator.h
Normal file
34
c_os/kernel/allocator/BumpAllocator.h
Normal file
@ -0,0 +1,34 @@
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/*****************************************************************************
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* *
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* B U M P A L L O C A T O R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Eine sehr einfache Heap-Verwaltung, welche freigegebenen *
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* Speicher nicht mehr nutzen kann. *
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* *
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* Autor: Michael Schoettner, HHU, 3.3.2022 *
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*****************************************************************************/
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#ifndef __BumpAllocator_include__
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#define __BumpAllocator_include__
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#include "kernel/Allocator.h"
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class BumpAllocator : Allocator {
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private:
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unsigned char* next;
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unsigned int allocations;
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BumpAllocator(Allocator& copy); // Verhindere Kopieren
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public:
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BumpAllocator() {}
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void init();
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void dump_free_memory();
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void* alloc(unsigned int req_size);
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void free(void* ptr);
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};
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#endif
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70
c_os/kernel/allocator/LinkedListAllocator.cc
Normal file
70
c_os/kernel/allocator/LinkedListAllocator.cc
Normal file
@ -0,0 +1,70 @@
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/*****************************************************************************
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* *
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* L I N K E D L I S T A L L O C A T O R *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Einfache Speicherverwaltung, welche den freien Speicher *
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* mithilfe einer einfach verketteten Liste verwaltet. *
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* *
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* Autor: Michael Schoettner, HHU, 13.6.2020 *
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*****************************************************************************/
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#include <stddef.h>
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#include "kernel/Globals.h"
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#include "kernel/allocator/LinkedListAllocator.h"
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#define HEAP_MIN_FREE_BLOCK_SIZE 64 // min. Groesse eines freien Blocks
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/*****************************************************************************
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* Methode: LinkedListAllocator::init *
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*---------------------------------------------------------------------------*
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* Beschreibung: Liste der Freispeicherbloecke intitialisieren. *
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* Anker zeigt auf ein Dummy-Element. Danach folgt *
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* ein Block der den gesamten freien Speicher umfasst. *
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* *
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* Wird automatisch aufgerufen, sobald eine Funktion der *
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* Speicherverwaltung erstmalig gerufen wird. *
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*****************************************************************************/
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void LinkedListAllocator::init() {
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/* Hier muess Code eingefuegt werden */
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}
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/*****************************************************************************
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* Methode: LinkedListAllocator::dump_free_memory *
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*---------------------------------------------------------------------------*
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* Beschreibung: Ausgabe der Freispeicherliste. Zu Debuggingzwecken. *
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*****************************************************************************/
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void LinkedListAllocator::dump_free_memory() {
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/* Hier muess Code eingefuegt werden */
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||||
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}
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||||
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||||
/*****************************************************************************
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||||
* Methode: LinkedListAllocator::alloc *
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||||
*---------------------------------------------------------------------------*
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||||
* Beschreibung: Einen neuen Speicherblock allozieren. *
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||||
*****************************************************************************/
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void * LinkedListAllocator::alloc(unsigned int req_size) {
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/* Hier muess Code eingefuegt werden */
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||||
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}
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||||
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||||
|
||||
/*****************************************************************************
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||||
* Methode: LinkedListAllocator::free *
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*---------------------------------------------------------------------------*
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||||
* Beschreibung: Einen Speicherblock freigeben. *
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||||
*****************************************************************************/
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void LinkedListAllocator::free(void *ptr) {
|
||||
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||||
/* Hier muess Code eingefuegt werden */
|
||||
|
||||
}
|
||||
|
43
c_os/kernel/allocator/LinkedListAllocator.h
Normal file
43
c_os/kernel/allocator/LinkedListAllocator.h
Normal file
@ -0,0 +1,43 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* L I N K E D L I S T A L L O C A T O R *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Einfache Speicherverwaltung, welche den freien Speicher *
|
||||
* mithilfe einer einfach verketteten Liste verwaltet. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, HHU, 13.6.2020 *
|
||||
*****************************************************************************/
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||||
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||||
#ifndef __LinkedListAllocator_include__
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#define __LinkedListAllocator_include__
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#include "kernel/Allocator.h"
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||||
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// Format eines freien Blocks
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struct free_block {
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unsigned int size;
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||||
struct free_block *next;
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||||
};
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||||
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||||
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class LinkedListAllocator : Allocator {
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||||
private:
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||||
// freie Bloecke werden verkettet
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||||
struct free_block *free_start;
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||||
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||||
LinkedListAllocator(Allocator ©); // Verhindere Kopieren
|
||||
|
||||
public:
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||||
LinkedListAllocator () { }
|
||||
|
||||
void init ();
|
||||
void dump_free_memory ();
|
||||
void* alloc (unsigned int req_size);
|
||||
void free (void *ptr);
|
||||
|
||||
};
|
||||
|
||||
#endif
|
21
c_os/main.cc
21
c_os/main.cc
@ -7,26 +7,27 @@
|
||||
* nachdem dieser in den Protected Mode geschaltet hat und *
|
||||
* die GDT und IDT initalisiert hat. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, HHU, 15.8.2016 *
|
||||
* Autor: Michael Schoettner, HHU, 11.11.2016 *
|
||||
*****************************************************************************/
|
||||
|
||||
#include "kernel/Allocator.h"
|
||||
#include "kernel/Globals.h"
|
||||
#include "user/KeyboardDemo.h"
|
||||
#include "user/SoundDemo.h"
|
||||
#include "user/TextDemo.h"
|
||||
#include "user/HeapDemo.h"
|
||||
|
||||
int main() {
|
||||
/* Hier muess Code eingefuegt werden */
|
||||
|
||||
// Speicherverwaltung initialisieren
|
||||
allocator.init();
|
||||
|
||||
// Bildschirm loeschen.
|
||||
kout.clear();
|
||||
|
||||
// TODO: Startmeldung ausgeben
|
||||
// Startmeldung ausgeben
|
||||
kout << "Yo it's booting" << endl;
|
||||
|
||||
// text_demo();
|
||||
// sound_demo();
|
||||
keyboard_demo();
|
||||
heap_demo();
|
||||
|
||||
while (1);
|
||||
while (1)
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
|
@ -29,7 +29,12 @@ MULTIBOOT_EAX_MAGIC equ 0x2badb002
|
||||
[GLOBAL startup]
|
||||
[GLOBAL idt]
|
||||
[GLOBAL __cxa_pure_virtual]
|
||||
[GLOBAL _ZdlPv]
|
||||
|
||||
; Michael Schoettner:
|
||||
; Nachfolgender label steht fuer das 'delete', welches jetzt implementiert
|
||||
; wird. Damit der Linker nicht wegen doppelter Definition "meckert"
|
||||
; nun auskommentieren!
|
||||
; [GLOBAL _ZdlPv]
|
||||
|
||||
[EXTERN main]
|
||||
[EXTERN int_disp]
|
||||
|
37
c_os/user/HeapDemo.cc
Normal file
37
c_os/user/HeapDemo.cc
Normal file
@ -0,0 +1,37 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* H E A P D E M O *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Demonstration der dynamischen Speicherverwaltung. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, HHU, 27.12.2016 *
|
||||
*****************************************************************************/
|
||||
|
||||
#include "user/HeapDemo.h"
|
||||
#include "kernel/Allocator.h"
|
||||
#include "kernel/Globals.h"
|
||||
#include "user/MyObj.h"
|
||||
|
||||
// Hilfsfunktion: Auf Return-Taste warten
|
||||
void waitForReturn() {
|
||||
|
||||
/* hier muss Code eingefuegt werden */
|
||||
|
||||
Key key;
|
||||
do {
|
||||
kb.key_hit();
|
||||
} while (key.ascii() != '\n');
|
||||
}
|
||||
|
||||
void heap_demo() {
|
||||
|
||||
/* hier muss Code eingefuegt werden */
|
||||
allocator.dump_free_memory();
|
||||
|
||||
MyObj* a = new MyObj(5);
|
||||
allocator.dump_free_memory();
|
||||
|
||||
MyObj* b = new MyObj(10);
|
||||
allocator.dump_free_memory();
|
||||
}
|
16
kernel/Globals.cc → c_os/user/HeapDemo.h
Executable file → Normal file
16
kernel/Globals.cc → c_os/user/HeapDemo.h
Executable file → Normal file
@ -1,18 +1,16 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* G L O B A L S *
|
||||
* H E A P D E M O *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Globale Variablen des Systems. *
|
||||
* Beschreibung: Demonstration der dynamischen Speicherverwaltung. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, 30.7.16 *
|
||||
* Autor: Michael Schoettner, HHU, 25.9.2016 *
|
||||
*****************************************************************************/
|
||||
|
||||
#include "kernel/Globals.h"
|
||||
#ifndef __HeapDemo_include__
|
||||
#define __HeapDemo_include__
|
||||
|
||||
|
||||
CPU cpu; // CPU-spezifische Funktionen
|
||||
PCSPK pcspk; // PC-Lautsprecher
|
||||
CGA_Stream kout; // Ausgabe-Strom fuer Kernel
|
||||
Keyboard kb; // Tastatur
|
||||
void heap_demo();
|
||||
|
||||
#endif
|
10
c_os/user/MyObj.h
Normal file
10
c_os/user/MyObj.h
Normal file
@ -0,0 +1,10 @@
|
||||
#ifndef __MyObj_INCLUDE_H_
|
||||
#define __MyObj_INCLUDE_H_
|
||||
|
||||
class MyObj {
|
||||
public:
|
||||
MyObj(unsigned int val) : value(val) {};
|
||||
unsigned int value;
|
||||
};
|
||||
|
||||
#endif
|
@ -1,23 +0,0 @@
|
||||
/*****************************************************************************
|
||||
* *
|
||||
* G L O B A L S *
|
||||
* *
|
||||
*---------------------------------------------------------------------------*
|
||||
* Beschreibung: Globale Variablen des Systems. *
|
||||
* *
|
||||
* Autor: Michael Schoettner, 30.7.16 *
|
||||
*****************************************************************************/
|
||||
#ifndef __Globals_include__
|
||||
#define __Globals_include__
|
||||
|
||||
#include "kernel/CPU.h"
|
||||
#include "devices/PCSPK.h"
|
||||
#include "devices/CGA_Stream.h"
|
||||
#include "devices/Keyboard.h"
|
||||
|
||||
extern CPU cpu; // CPU-spezifische Funktionen
|
||||
extern PCSPK pcspk; // PC-Lautsprecher
|
||||
extern CGA_Stream kout; // Ausgabe-Strom fuer Kernel
|
||||
extern Keyboard kb; // Tastatur
|
||||
|
||||
#endif
|
Reference in New Issue
Block a user