Import backup from 2003-09-01

Functions.c

@@ -13,7 +13,7 @@ inline void outportw(unsigned int port, unsigned int value)		// Output a word to
     asm volatile ("outw %%ax,%%dx"::"d" (port), "a" (value));
 };
 
-inline UCHAR inportb(unsigned short port)
+inline byte inportb(unsigned short port)
 {
 	unsigned char ret_val;
 
@@ -35,7 +35,7 @@ void disable_ints()
 
 void remap_pics(int pic1, int pic2)
 {
-	UCHAR	a1, a2;
+	byte	a1, a2;
 
 	a1 = inportb(PIC1_DATA);
 	a2 = inportb(PIC2_DATA);

functions.h

@@ -6,7 +6,7 @@
 
 inline void outportb(unsigned int port, unsigned char value);
 inline void outportw(unsigned int port, unsigned int value);
-inline UCHAR inportb(unsigned short port);
+inline byte inportb(unsigned short port);
 void enable_ints();
 void disable_ints();
 inline void restart();

io.asm

@@ -1,6 +1,10 @@
 
-;void writeCursorPosition(dword pos);
+%macro jzfar 1
-;dword getCursorPosition();
+	jnz	%%skip
+	jmp	%1
+%%skip:
+
+%endmacro
 
 [global _writeCursorPosition]
 [global _getCursorPosition]
@@ -13,7 +17,7 @@
 
 
 ;
-;void writeCursorPosition(int position)
+;void writeCursorPosition(word pos)
 ;
 _writeCursorPosition:
 	push	ebp
@@ -79,7 +83,7 @@ _getCursorPosition:
 
 
 ;
-;void putc(int chr)
+;int putc(int chr)
 ;
 _putc:
 	push	ebp
@@ -177,9 +181,9 @@ printf_loop:
 	mov	al, [ebx]
 	inc	ebx
 	cmp	al, 0
-	jz	printf_done
+	jzfar	printf_done
 	cmp	al, '%'
-	jz	printf_percent
+	jzfar	printf_percent
 	cmp	ecx, 1
 	jz	printf_special
 
@@ -196,6 +200,8 @@ printf_special:
 	jz	printf_hex
 	cmp	al, '%'
 	jz	printf_ppercent
+	cmp	al, 's'
+	jz	printf_string
 	jmp	printf_special_done
 
 printf_decimal:
@@ -218,6 +224,13 @@ printf_ppercent:
 	add	esp, 4
 	jmp	printf_special_done
 
+printf_string:
+	mov	eax, [esi]
+	push	eax
+	call	_puts
+	add	esp, 4
+	jmp	printf_special_done
+
 printf_special_done
 	add	esi, 4				;point to next extra argument
 	jmp	printf_loop
@@ -272,7 +285,7 @@ console_cls_loop:
 	ret
 
 ;
-;void putHex(dword number)
+;int putHex(dword number)
 ;
 _putHex:
 	push	ebp
@@ -318,15 +331,39 @@ putHex_loop_end:
 
 
 ;
-;void putDec(dword number)
+;int putDec(dword number)
 ;
 _putDec:
 
 	ret
 
 
+;
+;int puts(char *str)
+;
+_puts:
+	push	ebp
+	mov	ebp, esp
+	push	esi
+	push	eax
+	mov	esi, [ebp+8]			;esi = ptr to string
+puts_loop:
+	lodsb
+	cmp	al, 0
+	jz	puts_done
+	push	eax
+	call	_putc
+	add	esp, 4
+	jmp	puts_loop
+
+puts_done:
+	pop	eax
+	pop	esi
+	pop	ebp
+	ret
+
+
 
 
 
 
-

io.h

@@ -3,10 +3,15 @@
 #ifndef __HIO_H__
 #define __HIO_H__ __HIO_H__
 
-void writeCursorPosition(dword pos);
+void writeCursorPosition(word pos);
-dword getCursorPosition();
+word getCursorPosition();
-void putc(byte chr);
+int putc(byte chr);
 int printf(char *fmt, ...);
+int puts(char *str);
+int putDec(dword number);
+int putHex(dword number);
+void console_cls();
+void console_scroll();
 
 #endif
 

k_defines.h

@@ -28,9 +28,7 @@
 #define YELLOW_TXT	0x0E
 #define BRWHITE_TXT	0x0F
 
-#define UCHAR unsigned char
+#define FREERAM_START	0x268000
-#define USHORT unsigned short
-#define UINT unsigned int
 
 typedef	unsigned char	byte;
 typedef	unsigned short	word;

kernel.c

@@ -29,14 +29,6 @@ void k_init()
 	outportb(0x40, 0x2e); //msb
 	enable_ints();
 	video_init((ModeInfoBlock *) 0x90306);
-	int a;
-	for (a=0;a<768;a+=10)
-	{
-		video_horiz(a, 2, 1021, 0);
-		video_vert(a, 2, 765, 0x0000FFFF);
-	}
-	video_rect(10, 10, 100, 100, 0x00FFFFFF);
-	video_rectf(11, 11, 99, 99, 0x00FFFF00);
 	console_cls();
 	mm_init();
 }

mm.c

@@ -1,5 +1,11 @@
+// mm.c
+// 09/01/03 Josh Holtrop
+
+// 0x368000 is first available byte (this is right after the kernel @ 1mb and the initrd @ 2mb, 1440kb.
 
 
+pageblock *first_pageblock = (pageblock *) 0;
+dword	totalmem = 0;
 
 void mm_init()
 {
@@ -7,7 +13,28 @@ void mm_init()
 	memmap_entry	*maps = (memmap_entry *) 0x92000;
 	dword a;
 	for (a=0;a<(*memmap_entries);a++)
-		printf("Entry %x:\tBase:  %x\n\t\tLimit: %x\n\t\tAttributes: %x\n", a, maps[a].base.lowdword, maps[a].limit.lowdword, maps[a].attributes);
+	{
+		if (maps[a].attributes == 1)		// (1) mem free to OS
+		{
+			if  ((maps[a].base.lowdword + maps[a].limit.lowdword) > (FREERAM_START+4096))	//goes past where we start freeram
+			{
+				if (first_pageblock == 0)	//no pageblock page set up yet
+				{
+					if (maps[a].base.lowdword < (FREERAM_START+4096))
+					{
+						first_pageblock = (pageblock *) FREERAM_START;
+					}
+				}
+				else
+				{
+				}
+			}
+			totalmem += maps[a].limit.lowdword;
+		}
+	}
+	printf("Total memory available to OS: %x", totalmem);
 }
 
 
+
+

mm.h

@@ -11,6 +11,14 @@ typedef struct {
 } __attribute__((packed)) memmap_entry;
 
 
+typedef struct {
+	dword	base;
+	dword	length;		//in pages
+	dword	flags;
+	dword	link;
+} __attribute__ ((packed)) pageblock;		//16 byte pageblock entry - 512 entries = 1 page
+
+
 
 
 

stage2.asm

@@ -215,7 +215,7 @@ getmemmap_loop:
 	;mov	ebx, 0x00000000
 	mov	edx, 0x534D4150			;'SMAP'
 	int	0x15
-	jc	getmemmap_done
+	jc	getmemmap_carry
 	cmp	eax, 0x534D4150			;eax should be 'SMAP' on return...
 	jnz	getmemmap_error
 	cmp	ebx, 0
@@ -245,6 +245,8 @@ getmemmap_error:
 	hlt
 	jmp	$
 
+getmemmap_carry:
+	dec	edx
 getmemmap_done:
 	pop	edx
 	pop	di

video.c

@@ -22,7 +22,7 @@ void video_init(ModeInfoBlock *mib)
 		vid_ptr32 = (dword *) video_mode.PhysBasePtr;
 	}
 
-	UINT tot = ((video_mode.XResolution) * (video_mode.YResolution));
+	dword tot = ((video_mode.XResolution) * (video_mode.YResolution));
 	int a;
 	for (a = 0; a < tot; a++)
 	{

video.h

@@ -14,42 +14,42 @@ void video_psetp(int pixel, dword color);
 #define checkBoundsy(x) (x<0 ? x=0 : (x>=video_mode.YResolution ? x=video_mode.YResolution-1 : 0))
 
 typedef struct{
-	USHORT	ModeAttributes;
+	word	ModeAttributes;
-	UCHAR	WinAAttributes;
+	byte	WinAAttributes;
-	UCHAR	WinBAttributes;
+	byte	WinBAttributes;
-	USHORT	WinGranularity;
+	word	WinGranularity;
-	USHORT	WinSize;
+	word	WinSize;
-	USHORT	WinASegment;
+	word	WinASegment;
-	USHORT	WinBSegment;
+	word	WinBSegment;
-	UINT	WinFuncPtr;
+	dword	WinFuncPtr;
-	USHORT	BytesPerScanLine;
+	word	BytesPerScanLine;
 
-	USHORT	XResolution;
+	word	XResolution;
-	USHORT	YResolution;
+	word	YResolution;
-	UCHAR	XCharSize;
+	byte	XCharSize;
-	UCHAR	YCharSize;
+	byte	YCharSize;
-	UCHAR	NumberOfPlanes;
+	byte	NumberOfPlanes;
-	UCHAR	BitsPerPixel;
+	byte	BitsPerPixel;
-	UCHAR	NumberOfBanks;
+	byte	NumberOfBanks;
-	UCHAR	MemoryModel;
+	byte	MemoryModel;
-	UCHAR	BankSize;
+	byte	BankSize;
-	UCHAR	NumberOfImagePages;
+	byte	NumberOfImagePages;
-	UCHAR	Reserved1;
+	byte	Reserved1;
 
-	UCHAR	RedMaskSize;
+	byte	RedMaskSize;
-	UCHAR	RedFieldPosition;
+	byte	RedFieldPosition;
-	UCHAR	GreenMaskSize;
+	byte	GreenMaskSize;
-	UCHAR	GreenFieldPosition;
+	byte	GreenFieldPosition;
-	UCHAR	BlueMaskSize;
+	byte	BlueMaskSize;
-	UCHAR	BlueFieldPosition;
+	byte	BlueFieldPosition;
-	UCHAR	RsvdMaskSize;
+	byte	RsvdMaskSize;
-	UCHAR	RsvdFieldPosition;
+	byte	RsvdFieldPosition;
-	UCHAR	DirectColorModeInfo;
+	byte	DirectColorModeInfo;
 
 	dword	PhysBasePtr;
-	UINT	OffScreenMemOffset;
+	dword	OffScreenMemOffset;
-	USHORT	OffScreenMemSize;
+	word	OffScreenMemSize;
-	UCHAR	Reserved[206];
+	byte	Reserved[206];
 } ModeInfoBlock;