120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
//kernel.c
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//08/13/03 Josh Holtrop
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//Holtrop's Operating System
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#define VXR video_mode.XResolution
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#define VYR video_mode.YResolution
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#include "k_defines.h"
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#include "lib/string.h"
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#include "lib/io.h"
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#include "functions.h"
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#include "video.h"
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#include "mm.h"
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void isr(dword num);
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void k_init();
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#include "mm.c"
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#include "functions.c"
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#include "video.c"
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dword timer = 0;
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word index = 0;
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dword ptrs[512];
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dword goon = 1;
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dword req = 0;
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void k_init()
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{
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remap_pics(0x20, 0x28);
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//set timer : 2e9c = 100hz
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outportb(0x43, 0x34);
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outportb(0x40, 0x9c); //lsb
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outportb(0x40, 0x2e); //msb
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video_init((ModeInfoBlock *) 0x90306);
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mm_init();
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int a;
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for (a=0; a<512; a++)
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ptrs[a] = 0;
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enable_ints();
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console_cls();
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printf("Memory available to OS: %d MB", mm_totalmem/0x100000);
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/* pageblock *pb = first_pageblock;
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for (;;)
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{
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if (pb->flags == MM_PB_NP)
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break;
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printf("\nBase: 0x%x; Limit: 0x%x; Flags: 0x%x, Link: 0x%x", pb->base, pb->length, pb->flags, pb->link);
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pb = (pageblock *) pb->link;
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} */
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}
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void isr(dword num)
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{
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if (num == 0x20)
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{
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timer++;
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(*(byte *)0xb8000)++;
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if ((timer%50)==0)
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{
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if (goon)
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{
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if(ptrs[index] = (dword)mm_palloc(1024))
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printf("\nReq:%d\tAddr: %x\tEntries: %x\tMem: %x\tIndex: %x", req++, ptrs[index++], mm_freeentries(), mm_freemem(), index);
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else
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{
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goon = 0;
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index = 0;
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}
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}
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else
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{
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dword reslt = mm_pfree((void *)ptrs[index]); //zero returned means chunk freed successfully
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printf("\nReq:%d\tFree(): %x\tEntries: %x\tMem: %x\tIndex: %x", req++, reslt, mm_freeentries(), mm_freemem(), index++);
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if (reslt)
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{
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for (index=0; index<512; index++)
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ptrs[index] = 0;
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index = 0;
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goon = 1;
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}
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}
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}
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switch(timer)
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{
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case 150:
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video_rectf(VXR*3/11, 0, VXR*4/11, VYR-1, 0x00000088);
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break;
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case 200:
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video_rectf(VXR*7/11, 0, VXR*8/11, VYR-1, 0x00000088);
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break;
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case 250:
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video_rectf(VXR/11, 0, VXR*2/11, VYR*2/5, 0x00000088);
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break;
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case 300:
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video_rectf(VXR/11, VYR*3/5, VXR*2/11, VYR-1, 0x00000088);
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break;
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case 350:
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video_rectf(VXR*5/11, VYR/5, VXR*6/11, VYR*4/5, 0x00000088);
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break;
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case 400:
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video_rectf(VXR*9/11, VYR/5, VXR-1, VYR*2/5, 0x00000088);
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break;
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case 450:
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video_rectf(VXR*8/11, VYR*3/5, VXR*10/11, VYR*4/5, 0x00000088);
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break;
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}
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eoi();
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}
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//if (num == 0x21)
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// restart();
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}
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