Made framebuffer class, serial write functions, and finally got makefile to build without having to make clean

6 files changed, 101 insertions, 8 deletions

diff --git a/kernel/arch/x86_64/limine.cpp b/kernel/arch/x86_64/limine.cpp
index 8c67c52..9ea2bbc 100644
--- a/kernel/arch/x86_64/limine.cpp
+++ b/kernel/arch/x86_64/limine.cpp
@@ -1,6 +1,9 @@
 #include <stdint.h>

 #include <stddef.h>

+#include <stdio.h>

+#include <arch/x86_64/serial.h>

 #include "limine.h"

+#include <framebuffer.h>

 

 namespace {

 __attribute__((used, section(".requests")))

@@ -63,7 +66,12 @@ extern "C" void _start() {
         fb_ptr[i * (framebuffer->pitch / 4) + i] = 0xffffff;

     }

 

+    Framebuffer fb((uint32_t*)framebuffer->address, framebuffer->width, framebuffer->height);

+    fb.drawpixel(727, 727, 0x9528fd);

 

+    printf("video modes: %lx", framebuffer->mode_count);

+

+    kernel_main();

 

     // We're done, just hang...

     hcf();

diff --git a/kernel/arch/x86_64/serial.cpp b/kernel/arch/x86_64/serial.cpp
new file mode 100644
index 0000000..e90bcde
--- /dev/null
+++ b/kernel/arch/x86_64/serial.cpp
@@ -0,0 +1,23 @@
+#include <io.h>

+#include <string.h>

+

+#define PORT 0x3f8

+

+int is_transmit_empty() {

+    return inb(PORT + 5) & 0x20;

+}

+

+extern "C" void serial_putchar(char c) {

+    while (is_transmit_empty() == 0);

+    outb(PORT, c);

+}

+

+void serial_write(const char* data, size_t size) {

+    for (size_t i = 0; i < size; i++) {

+        serial_putchar(data[i]);

+    }

+}

+

+void serial_writestring(const char* data) {

+    serial_write(data, strlen(data));

+}
\ No newline at end of file
diff --git a/kernel/framebuffer.cpp b/kernel/framebuffer.cpp
new file mode 100644
index 0000000..a07d61a
--- /dev/null
+++ b/kernel/framebuffer.cpp
@@ -0,0 +1,22 @@
+#include <framebuffer.h>

+#include <stdint.h>

+#include <stddef.h>

+

+Framebuffer::Framebuffer(uint32_t* addr, const uint64_t width, const uint64_t height) 

+    : addr {addr}, width {width}, height {height} {

+    clear();

+}

+

+void Framebuffer::clear() {

+    for (size_t y = 0; y < height; y++) {

+        for (size_t x = 0; x < width; x++) {

+            const size_t i = y * width + x;

+            addr[i] = 0x000000;

+        }

+    }

+}

+

+void Framebuffer::drawpixel(const uint64_t x, const uint64_t y, const uint32_t color) {

+    const size_t pos = y * width + x;

+    addr[pos] = color;

+}
\ No newline at end of file
diff --git a/kernel/include/arch/x86_64/serial.h b/kernel/include/arch/x86_64/serial.h
new file mode 100644
index 0000000..2ee63c5
--- /dev/null
+++ b/kernel/include/arch/x86_64/serial.h
@@ -0,0 +1,19 @@
+#ifndef SERIAL_H

+#define SERIAL_H

+

+#include <stddef.h>

+

+#ifdef __cplusplus

+extern "C"

+{

+#endif

+

+void serial_putchar(char c);

+void serial_write(const char* data, size_t size);

+void serial_writestring(const char* data);

+

+#ifdef __cplusplus

+}

+#endif

+

+#endif
\ No newline at end of file
diff --git a/kernel/include/framebuffer.h b/kernel/include/framebuffer.h
new file mode 100644
index 0000000..6080810
--- /dev/null
+++ b/kernel/include/framebuffer.h
@@ -0,0 +1,18 @@
+#ifndef FRAMEBUFFER_H

+#define FRAMEBUFFER_H

+

+#include <stdint.h>

+

+class Framebuffer {

+    private:

+    uint32_t* addr;

+    const uint64_t width;

+    const uint64_t height;

+

+    public:

+    Framebuffer(uint32_t* addr, const uint64_t width, const uint64_t height);

+    void clear();

+    void drawpixel(const uint64_t x, const uint64_t y, const uint32_t color);

+};

+

+#endif
\ No newline at end of file
diff --git a/kernel/makefile b/kernel/makefile
index 8c2832d..33ab941 100644
--- a/kernel/makefile
+++ b/kernel/makefile
@@ -1,8 +1,11 @@
 # Kernel makefile

 

-CFLAGS := -ffreestanding -Wall -Wextra -g -std=gnu99 -O2 -Iinclude --sysroot=$(SYSROOT)

-CXXFLAGS := -ffreestanding -Wall -Wextra -fno-exceptions -fno-rtti -g -O2 -Iinclude --sysroot=$(SYSROOT)

-LDFLAGS := -T arch/$(ARCH)/linker.ld -ffreestanding -g -O2 -Iinclude --sysroot=$(SYSROOT)

+CFLAGS := -ffreestanding -Wall -Wextra -g -std=gnu99 -O2 -Iinclude --sysroot=$(SYSROOT) \

+	-isystem="/usr/include"

+CXXFLAGS := -ffreestanding -Wall -Wextra -fno-exceptions -fno-rtti -g -O2 -Iinclude --sysroot=$(SYSROOT) \

+	-isystem="/usr/include"

+LDFLAGS := -T arch/$(ARCH)/linker.ld -ffreestanding -g -O2 -Iinclude --sysroot=$(SYSROOT) \

+	-isystem="/usr/include"

 ASMFLAGS :=

 

 ifeq ($(ARCH),x86_64)

@@ -21,7 +24,7 @@ LIBS = -nostdlib -lc -lgcc
 #Find all the source files

 CPP_SRCS := $(shell find . -type f -name '*.cpp' -not -path './arch/*') \

 	$(shell find $(PWD)/kernel/arch/$(ARCH) -type f -name '*.cpp')

-#HEADERS := $(shell find $(PWD) -type f -name '*.h')

+HEADERS := $(shell find ./include -type f -name '*.h')

 #ASMFILES := $(shell find $(PWD) -type f -name '*.asm' -prune $(PWD)/arch) \

 	$(shell find $(PWD)/kernel/arch/$(ARCH) -type f -name '*.asm')

 

@@ -50,11 +53,11 @@ kernel.bin: ${OBJS}
 	$(CXX) ${LDFLAGS} -o $@ $(LINKLST)

 

 %.o: %.cpp

-	$(info [INFO] Compiling $<)

+#	$(info [INFO] Compiling $<)

 	$(CXX) ${CXXFLAGS} -MMD -MP -c $< -o $@

 

 %.o: %.c

-	$(info [INFO] Compiling $<)

+#	$(info [INFO] Compiling $<)

 	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@

 

 %.o: %.asm

@@ -67,9 +70,9 @@ kernel.bin: ${OBJS}
 # crtn.o: 

 # 	$(NASM) arch/$(ARCH)/crtn.asm $(ASMFLAGS) -o $@

 

-install-headers:

+install-headers: $(HEADERS)

 	cp -r --preserve=timestamps include/. $(SYSROOT)/usr/include

 

 clean:

 	$(info [INFO] Cleaning)

-	$(RM) ${OBJS} $(DEPFILES)
\ No newline at end of file
+	$(RM) ${OBJS} $(DEPFILES) kernel.bin
\ No newline at end of file