Improved logging system

kernel/drivers/timer.c

@@ -9,13 +9,12 @@ uint32_t tick = 0;
 
 static void timer_callback(registers_t regs) {
     tick++;
-    uint8_t buf[8];
+    /* uint8_t buf[8];
     itoa(tick, buf, 10);
     kprint((uint8_t*)"Time: ");
     uitoa(tick, buf, 10);
     kprint((uint8_t*)buf);
-    kprint((uint8_t*)"\n");
+    kprint((uint8_t*)"\n");*/
-
     // Cast to void unused parameter
     UNUSED_PAR(regs);
 }

kernel/drivers/timer.h

@@ -31,7 +31,7 @@
  */
 
 void init_timer(uint32_t frequency);
-
+uint32_t tick;
 /* Since regs parameter(from timer_callback) will be unused
  * GCC(with -Werror flag) will dump an error, so we avoid this
  * using the following macro

kernel/kernel_main.c

@@ -11,15 +11,29 @@
 #include "drivers/timer.h"
 #include "drivers/keyboard.h"
 #include "shell/shell.h"
+#include "libc/stdio.h"
 
 void kernel_main() {
-    gdt_setup(); // Setup Global Descriptor Table
+    printf_color("\n[STATUS]", LIGHT_GREEN, BLACK);
-    idt_setup(); // Setup Interrupt Descriptor Table
+    printf_color(" - Loading kernel, wait please...", WHITE, BLACK);
 
-    clear_prompt();
+    gdt_setup(); // Setup Global Descriptor Table
+    printf_color("\n[INFO]", LIGHT_CYAN, BLACK);
+    printf_color("   - Loaded GDT", WHITE, BLACK);
+
+    idt_setup(); // Setup Interrupt Descriptor Table
+    printf_color("\n[INFO]", LIGHT_CYAN, BLACK);
+    printf_color("   - Loaded IDT", WHITE, BLACK);
+
+    init_timer(1); // Initialize PIT driver
+    printf_color("\n[INFO]", LIGHT_CYAN, BLACK);
+    printf_color("   - Loaded PIT", WHITE, BLACK);
+
+    init_keyboard(); // Initialize keyboard driver
+    printf_color("\n[INFO]", LIGHT_CYAN, BLACK);
+    printf_color("   - Loaded PS/2 driver", WHITE, BLACK);
+    
     iceos_ascii_logo();
     init_prompt(); // Initialize frame buffer
-    init_keyboard(); // Initialize keyboard driver
 
-    // init_timer(1); // Only for debug purposes
 }

kernel/shell/shell.c

@@ -3,6 +3,7 @@
 #include "../libc/stdio.h"
 #include "../drivers/tty.h"
 #include "../drivers/ports.h"
+#include "../drivers/timer.h"
 
 void helper() {
     puts("\nList of available commands:\n"
@@ -10,6 +11,8 @@ void helper() {
          "\nint         - Test some interrupts"
          "\nbanner      - Show banner"
          "\nclear, cls  - Clear the screen"
+         "\nregs        - Prints register dump"
+         "\ntimer       - Prints timer tick"
          "\nabout       - About this kernel"
          "\nreboot      - Reboot the system"
         );
@@ -42,6 +45,44 @@ void about() {
     LIGHT_GREEN, BLACK);
 }
 
+void register_dump() {
+    register uint32_t eax_v asm("eax");
+    register uint32_t ebx_v asm("ebx");
+    register uint32_t ecx_v asm("ecx");
+    register uint32_t edx_v asm("edx");
+    register uint32_t esx_v asm("esi");
+    register uint32_t edi_v asm("edi");
+    register uint32_t ebp_v asm("ebp");
+    register uint32_t esp_v asm("esp");
+
+    printf_color("\n===================================\n"
+                 "  BEGIN 32 BITS CPU REGISTER DUMP    \n"
+                 "===================================\n",
+                 LIGHT_BROWN, BLACK);
+    printf("    EAX: %x\n"
+           "    EBX: %x\n"
+           "    ECX: %x\n"
+           "    EDX: %x\n"
+           "    ESX: %x\n"
+           "    EDI: %x\n"
+           "    EBP: %x\n"
+           "    ESP: %x\n",
+           eax_v, ebx_v, ecx_v, edx_v, esx_v, edi_v, ebp_v, esp_v);
+    printf_color("\n==================================\n"
+                 "   END 32 BITS CPU REGISTER DUMP    \n"
+                 "==================================\n",
+                 LIGHT_BROWN, BLACK);
+}
+
+void timer_dump() {
+    uint8_t buf[8];
+    uitoa(tick, buf, 10);
+
+    printf_color("\nTicks since boot: ",
+        LIGHT_GREEN, BLACK);
+    printf_color((const char*)buf,
+        LIGHT_CYAN, BLACK);
+}
 void reboot() {
     uint8_t tmp;
     asm("cli"); // First disable all interrupts
@@ -56,6 +97,27 @@ void reboot() {
     outb(0x64, 0xFE); // Reset the CPU
 }
 
+void processCommand(uint8_t *cmd) {
+    if(strcmp(cmd, (uint8_t*)"help") == 0)
+        helper();
+    else if(strcmp(cmd, (uint8_t*)"int") == 0)
+        test_interrupts();
+    else if(strcmp(cmd, (uint8_t*)"clear") == 0 || strcmp(cmd, (uint8_t*)"cls") == 0)
+        clear_prompt();
+    else if(strcmp(cmd, (uint8_t*)"about") == 0)
+        about();
+    else if(strcmp(cmd, (uint8_t*)"regs") == 0)
+        register_dump();
+    else if(strcmp(cmd, (uint8_t*)"timer") == 0)
+        timer_dump();
+    else if(strcmp(cmd, (uint8_t*)"banner") == 0)
+        iceos_ascii_logo();
+    else if(strcmp(cmd, (uint8_t*)"reboot") == 0)
+        reboot();
+    else
+        puts("\nCommand not found!");
+}
+
 void iceos_ascii_logo() {
     printf_color(
 "\n\n###  #####  ####### #######  #####\n"
@@ -67,21 +129,4 @@ void iceos_ascii_logo() {
 "###  #####  ####### #######  #####  \n"
 "\n     (c) Marco Cetica 2019\n",
  LIGHT_MAGENTA, BLACK);
- }
+ }
-
-void processCommand(uint8_t *cmd) {
-    if(strcmp(cmd, (uint8_t*)"help") == 0)
-        helper();
-    else if(strcmp(cmd, (uint8_t*)"int") == 0)
-        test_interrupts();
-    else if(strcmp(cmd, (uint8_t*)"clear") == 0 || strcmp(cmd, (uint8_t*)"cls") == 0)
-        clear_prompt();
-    else if(strcmp(cmd, (uint8_t*)"about") == 0)
-        about();
-    else if(strcmp(cmd, (uint8_t*)"banner") == 0)
-        iceos_ascii_logo();
-    else if(strcmp(cmd, (uint8_t*)"reboot") == 0)
-        reboot();
-    else
-        puts("\nCommand not found!");
-}