christoph/lecture-operating-system-development
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merged cleanup

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This commit is contained in:
Christoph Urlacher
2022-07-24 21:12:31 +02:00
parent 5ff3d72bfd
commit 6481bae5f6
92 changed files with 663 additions and 755 deletions
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13
c_os/kernel/BIOS.cc
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@ -17,13 +17,13 @@ extern "C" {
}
// in startup.asm im GDT-Eintrag so festgeschrieben!
#define BIOS16_CODE_MEMORY_START 0x24000
constexpr const unsigned int BIOS16_CODE_MEMORY_START = 0x24000;
// Parameter fuer BIOS-Aufrufe (Register)
#define BIOS16_PARAM_BASE 0x26000
constexpr const unsigned int BIOS16_PARAM_BASE = 0x26000;
// Zeiger auf Speichbereich fuer Parameter fuer BIOS-Aufruf (siehe BIOS.h)
struct BIOScall_params* BC_params = (struct BIOScall_params*)BIOS16_PARAM_BASE;
BIOScall_params* BC_params = reinterpret_cast<BIOScall_params*>(BIOS16_PARAM_BASE);
/*****************************************************************************
* Methode: BIOS::BIOS *
@ -33,7 +33,7 @@ struct BIOScall_params* BC_params = (struct BIOScall_params*)BIOS16_PARAM_BASE;
* im 4. GDT-Eintrag (siehe startup.asm). *
*****************************************************************************/
BIOS::BIOS() {
unsigned char* codeAddr = (unsigned char*)BIOS16_CODE_MEMORY_START;
unsigned char* codeAddr = reinterpret_cast<unsigned char*>(BIOS16_CODE_MEMORY_START);
// mov eax, 25000 (Adresse wohin aktuelles esp gesichert wird)
*codeAddr = 0x66;
@ -305,7 +305,6 @@ BIOS::BIOS() {
*codeAddr = 0x66;
codeAddr++;
*codeAddr = 0xCB;
codeAddr++;
}
/*****************************************************************************
@ -314,10 +313,10 @@ BIOS::BIOS() {
* Beschreibung: Fuehrt einen BIOS-Aufruf per Software-Interrupt durch. *
*****************************************************************************/
void BIOS::Int(int inter) {
unsigned char* ptr = (unsigned char*)BIOS16_CODE_MEMORY_START;
unsigned char* ptr = reinterpret_cast<unsigned char*>(BIOS16_CODE_MEMORY_START);
// Interrupt-Nummer in 16-Bit Code-Segment schreiben (unschoen, aber ...)
*(ptr + 48) = (unsigned char)inter;
*(ptr + 48) = static_cast<unsigned char>(inter);
CPU::disable_int(); // Interrupts abschalten
bios_call();