CMOS clock

.vscode/c_boilerplates.code-snippets

@@ -1,6 +1,5 @@
 {
 	"Fennix Kernel Header": {
-		"scope": "c",
 		"prefix": [
 			"head",
 		],

.vscode/c_cpp_properties.json

@@ -6,6 +6,7 @@
                 "${workspaceFolder}/include/**"
             ],
             "defines": [
+                "__debug_vscode__",
                 "KERNEL_NAME=\"Fennix\"",
                 "KERNEL_VERSION=\"1.0\"",
                 "GIT_COMMIT=\"0000000000000000000000000000000000000000\"",

Kernel.cpp

@@ -1,10 +1,34 @@
 #include "kernel.h"
 
+#include <display.hpp>
 #include <memory.hpp>
 #include <string.h>
+#include <printf.h>
+#include <time.hpp>
 #include <debug.h>
 
 BootInfo *bInfo = nullptr;
+Video::Display *Display = nullptr;
+
+// For the Display class. Printing on first buffer.
+extern "C" void putchar(char c) { Display->Print(c, 0); }
+
+#ifdef __debug_vscode__
+extern "C" int printf_(const char *format, ...);
+extern "C" int vprintf_(const char *format, va_list arg);
+#endif
+
+void KPrint(const char *format, ...)
+{
+    Time tm = ReadClock();
+    printf_("[%02ld:%02ld:%02ld] ", tm.Hour, tm.Minute, tm.Second);
+    va_list args;
+    va_start(args, format);
+    vprintf_(format, args);
+    va_end(args);
+    putchar('\n');
+    Display->SetBuffer(0);
+}
 
 EXTERNC void kernel_aarch64_entry(uint64_t dtb_ptr32, uint64_t x1, uint64_t x2, uint64_t x3)
 {
@@ -20,11 +44,12 @@ EXTERNC void kernel_entry(BootInfo *Info)
     bInfo = (BootInfo *)KernelAllocator.RequestPages(TO_PAGES(sizeof(BootInfo)));
     memcpy(bInfo, Info, sizeof(BootInfo));
     debug("BootInfo structure is at %p", bInfo);
+    Display = new Video::Display(bInfo->Framebuffer[0]);
+    printf_("%s - %s(%s)\n", KERNEL_NAME, KERNEL_VERSION, GIT_COMMIT_SHORT);
+    Display->SetBuffer(0);
+    for (size_t i = 0; i < 70; i++)
+        KPrint("Hello, World! (%ld)", i);
+
     while (1)
         CPU::Halt();
 }
-
-// TODO: Implement screen printing
-extern "C" void putchar(int a, int b)
-{
-}

arch/Time.cpp

@@ -0,0 +1,38 @@
+#include <time.hpp>
+#include <io.h>
+
+Time ReadClock()
+{
+    Time tm;
+#if defined(__amd64__) || defined(__i386__)
+    uint32_t t = 0;
+    outb(0x70, 0x00);
+    t = inb(0x71);
+    tm.Second = ((t & 0x0F) + ((t >> 4) * 10));
+    outb(0x70, 0x02);
+    t = inb(0x71);
+    tm.Minute = ((t & 0x0F) + ((t >> 4) * 10));
+    outb(0x70, 0x04);
+    t = inb(0x71);
+    tm.Hour = ((t & 0x0F) + ((t >> 4) * 10));
+    outb(0x70, 0x07);
+    t = inb(0x71);
+    tm.Day = ((t & 0x0F) + ((t >> 4) * 10));
+    outb(0x70, 0x08);
+    t = inb(0x71);
+    tm.Month = ((t & 0x0F) + ((t >> 4) * 10));
+    outb(0x70, 0x09);
+    t = inb(0x71);
+    tm.Year = ((t & 0x0F) + ((t >> 4) * 10));
+    tm.Counter = 0;
+#elif defined(__aarch64__)
+    tm.Year = 0;
+    tm.Month = 0;
+    tm.Day = 0;
+    tm.Hour = 0;
+    tm.Minute = 0;
+    tm.Second = 0;
+    tm.Counter = 0;
+#endif
+    return tm;
+}

core/README.md

@@ -0,0 +1,11 @@
+# Core components
+
+This directory contains the core components of the project. These components are used by the kernel to provide the basic functionality of the operating system.
+
+---
+
+## 💾 Memory
+
+Contains the memory management code.
+It is responsible for allocating and freeing memory.
+It also provides the `kmalloc`, `kcalloc`, `krealloc` and `kfree` functions that are used by the rest of the kernel.

include/printf.h

@@ -43,7 +43,8 @@
 #include <stddef.h>
 
 #ifdef __cplusplus
-extern "C" {
+extern "C"
+{
 #endif
 
 #ifdef __GNUC__
@@ -98,7 +99,6 @@ __attribute__((format(__printf__, (one_based_format_index), (first_arg))))
     PRINTF_VISIBILITY
     void putchar(char c);
 
-
     /**
      * An implementation of the C standard's printf/vprintf
      *
@@ -118,7 +118,6 @@ PRINTF_VISIBILITY
     int vprintf_(const char *format, va_list arg) ATTR_VPRINTF(1);
     ///@}
 
-
     /**
      * An implementation of the C standard's sprintf/vsprintf
      *
@@ -139,7 +138,6 @@ PRINTF_VISIBILITY
     int vsprintf_(char *s, const char *format, va_list arg) ATTR_VPRINTF(2);
     ///@}
 
-
     /**
      * An implementation of the C standard's snprintf/vsnprintf
      *
@@ -162,8 +160,6 @@ PRINTF_VISIBILITY
     int vsnprintf_(char *s, size_t count, const char *format, va_list arg) ATTR_VPRINTF(3);
     ///@}
 
-
-
     /**
      * printf/vprintf with user-specified output function
      *

include/time.hpp

@@ -0,0 +1,14 @@
+#ifndef __FENNIX_KERNEL_TIME_H__
+#define __FENNIX_KERNEL_TIME_H__
+
+#include <types.h>
+
+struct Time
+{
+    uint64_t Year, Month, Day, Hour, Minute, Second;
+    uint64_t Counter;
+};
+
+Time ReadClock();
+
+#endif // !__FENNIX_KERNEL_TIME_H__