bochsrc.txt

@@ -0,0 +1,53 @@
+# configuration file generated by Bochs
+plugin_ctrl: unmapped=1, biosdev=1, speaker=1, extfpuirq=1, parallel=1, serial=1, iodebug=1
+config_interface: textconfig
+display_library: x
+memory: host=32, guest=32
+romimage: file="/usr/share/bochs/BIOS-bochs-latest", address=0x0, options=none
+vgaromimage: file="/usr/share/bochs/VGABIOS-lgpl-latest"
+boot: a
+floppy_bootsig_check: disabled=1
+floppya: 1_44=/dev/loop0, status=inserted
+# no floppyb
+ata0: enabled=0
+ata1: enabled=0
+ata2: enabled=0
+ata3: enabled=0
+optromimage1: file=none
+optromimage2: file=none
+optromimage3: file=none
+optromimage4: file=none
+optramimage1: file=none
+optramimage2: file=none
+optramimage3: file=none
+optramimage4: file=none
+pci: enabled=1, chipset=i440fx
+vga: extension=vbe, update_freq=5, realtime=1
+cpu: count=1:1:1, ips=1000000, quantum=16, model=bx_generic, reset_on_triple_fault=0, cpuid_limit_winnt=0, ignore_bad_msrs=1, mwait_is_nop=0
+cpuid: level=6, stepping=3, model=3, family=6, vendor_string="AuthenticAMD", brand_string="AMD Athlon(tm) processor"
+cpuid: mmx=1, apic=xapic, simd=sse2, sse4a=0, misaligned_sse=0, sep=1, movbe=0, adx=0
+cpuid: aes=0, sha=0, xsave=0, xsaveopt=0, avx_f16c=0, avx_fma=0, bmi=0, xop=0, fma4=0
+cpuid: tbm=0, x86_64=1, 1g_pages=0, pcid=0, fsgsbase=0, smep=0, smap=0, mwait=1
+print_timestamps: enabled=0
+debugger_log: ../red.debug
+magic_break: enabled=1
+port_e9_hack: enabled=0
+private_colormap: enabled=0
+clock: sync=none, time0=local, rtc_sync=0
+# no cmosimage
+# no loader
+log: ../red.log
+logprefix: %t%e%d
+debug: action=ignore
+info: action=report
+error: action=report
+panic: action=ask
+keyboard: type=mf, serial_delay=250, paste_delay=100000, user_shortcut=none
+mouse: type=ps2, enabled=0, toggle=ctrl+mbutton
+speaker: enabled=1, mode=system
+parport1: enabled=1, file=none
+parport2: enabled=0
+com1: enabled=1, mode=null
+com2: enabled=0
+com3: enabled=0
+com4: enabled=0

c_files.txt

@@ -6,7 +6,6 @@ kernel\utils.c
 kernel\graphics.c
 kernel\print.c
 kernel\interrupts.c
-kernel\ports.c
 kernel\memory.c
 kernel\memory\memmove.c
 kernel\memory\memcmp.c

include/kernel.h

@@ -618,9 +618,6 @@ static const char* ExceptionStrings[] = {
 /*  =                       Sync Functions                      = */
 /*  ============================================================= */
 
-/* Required functions */
-size_t      strlen(const char* string);
-
 /* System Initialization */
 void        PrepareSystem(FILELOADER_PARAMS* FLOP);
 
@@ -642,13 +639,10 @@ uint32_t    ReadPort(uint16_t Port, int Length);
 uint32_t    WritePort(uint16_t Port, uint32_t Data, int Length);
 
 /* Serial functions */
-void        serialWrite(const char chr);
-void        serialPrint(const char* data);
-void        serialPrintf(const char* format, ...);
-void        serialInit();
-void        inttoa(int input, char* output);
-void        itoh(int input, char* output);
-void        zeroString(char* string);
+void serial_write(const char chr);
+void serial_print(const char* data);
+void serial_printf(const char* format, ...);
+void init_serial();
 
 /*  ==================== Registers ==================== */
 size_t      ReadModelSpecificRegister(size_t MSR);

kernel/bootstrap.c

@@ -43,12 +43,12 @@ __attribute__((aligned(4096))) static size_t FirstPageTable[512] = {0};
  */
 
  //Play sound using built in speaker
- static void playPCSpeaker(uint32_t frequency) {
+ static void play_sound(uint32_t nFrequence) {
  	uint32_t Div;
  	uint8_t tmp;
  
         //Set the PIT to the desired frequency
- 	Div = 1193180 / frequency;
+ 	Div = 1193180 / nFrequence;
  	WritePort(0x0043, 0xb6, 1);
  	WritePort(0x0042, (uint8_t) (Div), 1);
  	WritePort(0x0042, (uint8_t) (Div >> 8), 1);
@@ -61,22 +61,22 @@ __attribute__((aligned(4096))) static size_t FirstPageTable[512] = {0};
  }
  
  //make it shutup
- static void stopPCSpeaker() {
+ static void nosound() {
  	uint8_t tmp = ReadPort(0x0061, 1) & 0xFC;
  
  	WritePort(0x0061, tmp, 1);
  }
  
  //Make a beep
- void beepPCSpeaker() {
- 	 playPCSpeaker(1000);
- 	 awaitTicks(10);
- 	 stopPCSpeaker();
+ void beep() {
+ 	 play_sound(1000);
+ 	 timer_wait(10);
+ 	 nosound();
           //set_PIT_2(old_frequency);
  }
 
 
-void awaitTicks(int ticks) {
+void timer_wait(int ticks){
     uint64_t FinalTick = time + ticks;
 
     int i = 0;
@@ -94,19 +94,9 @@ void PrepareSystem(FILELOADER_PARAMS* FLOP) {
 
 
     SetupPrinting(FLOP->GPU_Info->GPUs[0]);
-    ClearScreen(Print_Info.defaultGPU);
-    printf("1");
-    SetupPrinting(FLOP->GPU_Info->GPUs[1]);
-    ClearScreen(Print_Info.defaultGPU);
-    printf("2");
     /* All print functions are now available. */
     printf("ready!");
     
-	serialInit();
-	serialPrintf("Kernel has been given control of the computer.\nStarting bootstrap init.\n");
-	
-    FLOP->RTServices->ResetSystem(EfiResetShutdown, EFI_SUCCESS, 0, L"");
-    
     InstallGDT();
     InstallIDT();
 

kernel/descriptor_tables.c

@@ -18,7 +18,9 @@
    and other functions that are uniquely
    related to the above tasks. */
 
-#include <kernel.h>
+#include <kernel/utils.h>
+#include <kernel/descriptor_tables.h>
+#include <kernel/serial.h>
 
  /*
   * The GDT gate setting function.

kernel/graphics.c

@@ -37,6 +37,8 @@ void SetupPrinting(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU) {
     Print_Info.cursorPos = 0;
 
     Print_Info.scrollMode = 0;
+
+    ClearScreen(GPU);
 }
 
 void WriteScaledFormatString(EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE GPU,

kernel/interrupts.c

@@ -52,8 +52,8 @@ void ISR_Common(INTERRUPT_FRAME* Frame, size_t Exception) {
 	if(Exception < 32) {
 		/* ExceptionStrings is an array of c-strings defined in kernel.h */
 		
-		serialPrint(ExceptionStrings[Exception]);
-		serialPrint(" Exception.\r\n");
+		serial_print(ExceptionStrings[Exception]);
+		serial_print(" Exception.\r\n");
 		printf("%s exception!", ExceptionStrings[Exception]);
 		panic();
 	}
@@ -63,8 +63,8 @@ void ISR_Common(INTERRUPT_FRAME* Frame, size_t Exception) {
 	into what went wrong. In pure Curle style, though, we just ignore the error code. */
 void ISR_Error_Common(EXCEPTION_FRAME* Frame, size_t Exception) {
 	if(Exception < 32) {
-		serialPrint(ExceptionStrings[Exception]);
-		serialPrintf(" Exception. Context given: %d\r\n", Frame->ErrorCode);
+		serial_print(ExceptionStrings[Exception]);
+		serial_printf(" Exception. Context given: %d\r\n", Frame->ErrorCode);
 		printf("%s exception. Context: %x", ExceptionStrings[Exception], Frame->ErrorCode);
 		panic();
 	}

kernel/kernel.c

@@ -23,6 +23,8 @@ void gdb_end() {} /* GDB Debugging stump */
 static size_t time = 0;
 
 int kernel_main(FILELOADER_PARAMS* FLOP) {
+	init_serial();
+	serial_printf("Kernel has been given control of the computer.\nStarting bootstrap init.\n");
 	/* The kernel is started in 64-bit Long Mode by Syncboot. */
 
 	/* PrepareSystem just initializes all hardware features and gets the system ready to execute every function.

kernel/serial.c

@@ -14,118 +14,132 @@
 
 #include <kernel.h>
 
-#define SERIAL_DATA(base)           	(base)
-#define SERIAL_DLAB(base)				(base + 1)
-#define SERIAL_FIFO(base)   			(base + 2)
-#define SERIAL_LINE(base)  				(base + 3)
-#define SERIAL_MODEM(base)  			(base + 4)
-#define SERIAL_LINE_STATUS(base)    	(base + 5)
-#define COM1			                0x3F8
+#define SERIAL_DATA_PORT(base)           (base)
+#define SERIAL_FIFO_COMMAND_PORT(base)   (base + 2)
+#define SERIAL_LINE_COMMAND_PORT(base)   (base + 3)
+#define SERIAL_MODEM_COMMAND_PORT(base)  (base + 4)
+#define SERIAL_LINE_STATUS_PORT(base)    (base + 5)
+#define SERIAL_COM1_BASE                 0x3F8
 
+#define SERIAL_LINE_ENABLE_DLAB          0x80
 
-/**   serialSetBaudrate:
+/**   serial_set_baud_rate:
   *   Sets the speed that data is sent via the serial port.
   *   The default speed is 115200 bits/s.
   *   The argument given is the divisor of the number.
   *   Hence, the new speed becomes (115200/divisor) bits/s.
   *
+  *   @param com      The COM port to configure.
   *   @param divisor  The new divisor for the baud rate.
   */
 
-void serialSetBaudrate() {
-	WritePort(SERIAL_LINE(COM1), 0x80, 1);
+void serial_set_baud_rate(uint16_t com, uint16_t divisor) {
+	WritePort(SERIAL_LINE_COMMAND_PORT(com),
+		 SERIAL_LINE_ENABLE_DLAB, 1);
 		 
-	WritePort(SERIAL_DATA(COM1), 0x03, 1);
+	WritePort(SERIAL_DATA_PORT(com),
+		 (divisor >> 8) & 0x00FF, 1);
 	
-	WritePort(SERIAL_DLAB(COM1), 0x00, 1);
+	WritePort(SERIAL_DATA_PORT(com),
+		 divisor & 0x00FF, 1);
 		
 }
 
-/**   serialConfigure:
+/**   serial_configure_line:
   *   Sets a specific data byteset in the Serial hardware.
   *   Required for expected operation.
+  *
+  *   @param com  The COM port to configure.
   */
 
-void serialConfigure() {
+void serial_configure_line(uint16_t com) {
    /* Bit:        | 7 | 6 | 5 4 3  | 2 | 1 0 |
     * Content:    | d | b | parity | s | dl  |
 	* Value:      | 0 | 0 | 0 0 0  | 0 | 1 1 | = 0x03
 	*/
-	WritePort(SERIAL_LINE(COM1), 0x03, 1);
+	 
+	WritePort(SERIAL_LINE_COMMAND_PORT(com), 0x0B, 1);
 }
 
-/**   serialConfigureBuffers:
+/**   serial_configure_buffers:
   *   Enables FIFO (First In First Out) on the Serial line.
   *   It clears both the receive and transmit queues.
   *   It uses a 14 byte wide queue.
   *
+  *  @param com   The COM port to configure.
   */
   
-void serialConfigureBuffers() {
+void serial_configure_buffers(uint16_t com) {
    /* Bit:        | 7 6 | 5  | 4 |  3  |  2  |  1  | 0 |
 	* Content:    | 1v1 | bs | r | dma | clt | clr | e |
 	* Value:      | 1 1 | 0  | 0 |  0  |  1  |  1  | 1 | = 0xC7
 	*/
 	
-	WritePort(SERIAL_FIFO(COM1), 0xC7, 1);
+	WritePort(SERIAL_FIFO_COMMAND_PORT(com), 0xC7, 1);
 }
 
-/**   serialConfigureModem:
+/**   serial_configure_modem
+  *   @param com  The COM port to configure.
   */
   
-void serialConfigureModem() {
+void serial_configure_modem(uint16_t com) {
    /* Bit:        | 7 | 6 | 5  | 4  |  3  |  2  |  1  |  0  |
     * Content:    | r | r | af | lb | ao2 | ao1 | rts | dtr |
 	* Value:      | 0 | 0 | 0  | 0  |  0  |  0  |  1  |  1  | = 0x03
 	*/
 	
-	WritePort(SERIAL_MODEM(COM1), 0x03, 1);
+	WritePort(SERIAL_MODEM_COMMAND_PORT(com), 0x3, 1);
 }
 
-/**   serialCheck:
+/**   serial_check_tqueue:
   *   Checks whether the Transmit FIFO Queue is empty on the given port.
   *
+  *   @param com  The COM port to check.
   *   @return  0  If the queue is not empty.
   *            1  If the queue is empty.
   */
   
-int serialCheck() {
-	return ReadPort(SERIAL_LINE_STATUS(COM1), 1) & 0x20;
+int serial_check_tqueue(uint16_t com) {
+	return ReadPort(SERIAL_LINE_STATUS_PORT(com), 1) & 0x20;
 }
 
 /**   serial_write:
   *   Prints a single character to the serial port.
   *   Does nothing fancy.
+  *   @param com  The COM port to write to.
   *   @param data The character to write.
   */
 
-void serialWrite(const char chr) {
+void serial_write(const char chr) {
+	uint16_t com = SERIAL_COM1_BASE;
 	//Hang until we have access to the COM port.
-	while(!serialCheck());
-	WritePort(COM1, chr, 1);
+	while(serial_check_tqueue(com) == 0);
+	WritePort(com, chr, 1);
 }
 
-/**   serialPrint:
+/**   serial_print:
   *   Prints a string to the serial port.
   *   Does not support ANSI codes, or color.
   *
+  *   @param com  The COM port to write to.
   *   @param data The string to write.
   */
  
-void serialPrint(const char* data) {
+void serial_print(const char* data) {
 	for(size_t i = 0; i < strlen(data); i++) {
-		serialWrite(data[i]);
+		serial_write(data[i]);
 	}
 }
 
-/**   serialPrintf:
+/**   serial_printf:
   *   A printf-style function for the serial port.
   *   
   *   @param format  The base string - used to substitute the succeding values.
   *   @param ...     The substitutions.
   */
   
-void serialPrintf(const char* format, ...) {
+void serial_printf(const char* format, ...) {
+	uint16_t com = SERIAL_COM1_BASE;
 	uint32_t storage; //To hold temporary variables
 	char stringstore[10] = {0}; //To convert ints to strings.
 	va_list list;
@@ -138,46 +152,46 @@ void serialPrintf(const char* format, ...) {
 			if(format[i+1] == 'd') {
 				
 				storage = va_arg(list, int);
-				inttoa(storage, stringstore);
-				serialPrint(stringstore);
-				zeroString(stringstore);
+				int_to_ascii(storage, stringstore);
+				serial_print(stringstore);
+				empty_string(stringstore);
 				i += 2;
 				
 			} else if(format[i+1] == 'x') {
 				
 				storage = va_arg(list, int);
-				itoh(storage, stringstore);
-				serialPrint(stringstore);
-				zeroString(stringstore);
+				int_to_hex(storage, stringstore);
+				serial_print(stringstore);
+				empty_string(stringstore);
 				i += 2;
 				
 			} else if(format[i+1] == 's') {
 				
-				serialPrint(va_arg(list, char*));
+				serial_print(va_arg(list, char*));
 				i += 2;
 				
 			} else {
-				serialPrint("ERROR: Attempting to parse unknown format string.");
+				serial_print("ERROR: Attempting to parse unknown format string.");
 				return;
 			}
 		} else {
-			serialWrite(format[i]);
+			serial_write(format[i]);
 			i++;
 		}
 	}
 	va_end(list); //Free the list
 }
 
-void serialInit() {
+void init_serial() {
 	// Disable interrupts
-	WritePort(SERIAL_DLAB(COM1), 0x00, 1);
+	WritePort(SERIAL_COM1_BASE + 1, 0x00, 1);
 	
-	// Set baud rate divisor to 3
-	serialSetBaudrate();
+	// Set baud rate divisor.
+	serial_set_baud_rate(SERIAL_COM1_BASE, 3);
 	// 8 bits, no parity, one stop bit.
-	serialConfigure();
+	serial_configure_line(SERIAL_COM1_BASE);
 	// Enable FIFO and clear buffers.
-	serialConfigureBuffers();
+	serial_configure_buffers(SERIAL_COM1_BASE);
 	// Enable IRQs, RTS/DSR set.
-	serialConfigureModem();
+	serial_configure_modem(SERIAL_COM1_BASE);
 }

kernel/utils.c

@@ -93,7 +93,7 @@ int memcmp (const void *str1, const void *str2, size_t count) {
   * @param  string: The string to be written into.
   */
 
-void inttoa(int num, char* string) {
+void int_to_ascii(int num, char* string) {
 	size_t i = 0; //Counter.
 	// TODO: Convert this to a for-loop?
 	int32_t calc = 0;
@@ -157,8 +157,8 @@ char* itoc(size_t num) {
  *  @param num: Number to convert
  *  @param string: String pointer to put the converted number.
 */
-void itoh(int num, char* string) {
-	zeroString(string);
+void int_to_hex(int num, char* string) {
+	empty_string(string);
 	
 	uint8_t i = 8;
 	uint8_t temp = 0;
@@ -182,7 +182,7 @@ void itoh(int num, char* string) {
   * @param  string: The string to empty.
   */
 
-void zeroString(char* string) {
+void empty_string(char* string) {
 	size_t len = strlen(string);
 	
 	for(size_t i = 0; i < len + 1; i++) {

makefile

@@ -0,0 +1,91 @@
+DEFAULT_HOST:=i686-elf
+HOST?=DEFAULT_HOST
+HOSTARCH:=i386
+CC:=$(PREFIX)/bin/$(DEFAULT_HOST)-gcc
+
+CFLAGS?= -O0 -g -fno-pie -fno-stack-protector -Wl,--build-id=none
+CPPFLAGS?=
+LDFLAGS?=
+LIBS?=
+
+DESTDIR?=
+PREFIX?=/usr/local
+EXEC_PREFIX?=$(PREFIX)
+BOOTDIR?=$(EXEC_PREFIX)/boot
+INCLUDEDIR?=$(PREFIX)/include
+
+CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra -I"../include" -I"../../include"
+CPPFLAGS:=$(CPPFLAGS) -D__is_kernel -Iinclude
+LDFLAGS:=$(LDFLAGS)
+LIBS:=$(LIBS) -nostdlib -lgcc
+
+ARCHDIR=arch/$(HOSTARCH)
+
+include $(ARCHDIR)/make.config
+
+CFLAGS:=$(CFLAGS) $(KERNEL_ARCH_CFLAGS)
+CPPFLAGS:=$(CPPFLAGS) $(KERNEL_ARCH_CPPFLAGS)
+LDFLAGS:=$(LDFLAGS) $(KERNEL_ARCH_LDFLAGS)
+LIBS:=$(LIBS) $(KERNEL_ARCH_LIBS)
+
+KERNEL_OBJS=           \
+$(KERNEL_ARCH_OBJS)    \
+kernel/utils.o         \
+kernel/serial.o        \
+kernel/interrupts.o    \
+kernel/descriptor_tables.o\
+kernel/kernel.o        
+
+OBJS=\
+$(KERNEL_OBJS)        
+
+LINK_LIST=\
+$(LDFLAGS)            \
+$(KERNEL_OBJS)        \
+$(LIBS)               \
+
+.PHONY: all clean install install-headers install-kernel
+.SUFFIXES: .o .c .s
+
+all: red.kernel
+
+red.kernel: $(OBJS) $(ARCHDIR)/linker.ld
+	$(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST)
+		
+kernel/interrupts.o: 
+	$(CC) -MD -c kernel/interrupts.c -o $@ -std=gnu11 $(CFLAGS) -mno-red-zone -mgeneral-regs-only $(CPPFLAGS)
+
+.c.o:
+	$(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS)
+.s.o:
+	nasm -f elf $< -o $@
+		
+clean:
+	rm -f red.kernel
+	rm -f $(OBJS) *.o */*.o */*/*.o
+	rm -f $(OBJS:.o=.d) *.d */*.d */*/*.d
+
+install: install-headers install-kernel gen-iso
+
+install-headers:
+	mkdir -p $(DESTDIR)$(INCLUDEDIR)
+	cp -R --preserve=timestamps include/. $(DESTDIR)$(INCLUDEDIR)/.
+	
+install-kernel: red.kernel
+	mkdir -p $(DESTDIR)$(BOOTDIR)
+	cp red.kernel $(DESTDIR)$(BOOTDIR)
+	
+gen-iso: 
+	rm -f red.iso 
+	cp red.kernel iso/boot/kernel.elf 
+	genisoimage -R                    \
+		-b boot/grub/stage2_eltorito  \
+		-no-emul-boot                 \
+		-A ProjectRED                 \
+		-input-charset utf8           \
+		-quiet                        \
+		-boot-info-table              \
+		-o red.iso                    \
+		iso
+	
+-include $(OBJS:.o=.d)