GDT is running again

This commit is contained in:
2021-11-06 21:56:42 +01:00
parent 5fb55367ca
commit 32909aaed9
5 changed files with 20 additions and 13 deletions

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@ -46,7 +46,7 @@ _start:
call early_main
cli
.global load_gdt
load_gdt:
lgdt gdt

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@ -2,6 +2,8 @@
#include "../tty/kterm.h"
gdtEntry_t gdt[3];
gdtSegmentPointer gdtPointer{};
void gdtSetGate(int num, uint64_t base, uint64_t limit, uint8_t access,
@ -18,14 +20,12 @@ void gdtSetGate(int num, uint64_t base, uint64_t limit, uint8_t access,
}
void setupGdt(){
printf("setupGdt is called!");
gdtPointer.limit = (sizeof(gdtEntry_t) * 3) - 1;
gdtPointer.base = &gdt;
gdtPointer.base = (uint32_t) &gdt;
gdtSetGate(0, 0, 0, 0, 0);
gdtSetGate(1, 0, 0xFFFFFFFF, 0x9A, 0xCF);
gdtSetGate(2, 0, 0xFFFFFFFF, 0x92, 0xCF);
loadGdt();
printf("call to load gdt\n");
load_gdt();
}

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@ -10,11 +10,13 @@ typedef struct {
uint8_t hBase;
} gdtEntry_t;
struct {
struct gdtSegmentPointer {
uint16_t limit;
uint32_t base;
} gdtPointer;
};
extern void loadGdt();
extern gdtSegmentPointer gdtPointer;
extern void load_gdt();
void setupGdt();
}

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@ -26,17 +26,18 @@
printf("kernel: 0x%x - 0x%x\n", &kernel_begin , &kernel_end);
}
//setupGdt();
printf("Call to setupGdt!\n");
setupGdt();
}
extern "C" void kernel_main (void) {
printf("call to init serial\n");
init_serial();
while (false){
while (true){
//Read time indefinetely
read_rtc();
printf( "UTC time: %02d-%02d-%02d %02d:%02d:%02d [ Formatted as YY-MM-DD h:mm:ss]\r" ,year, month, day, hour, minute, second);