Draft of keyboard driver

kernel/include/keyboard.hpp

@@ -24,6 +24,8 @@ char get_char();
 char key_to_ascii(uint8_t key);
 char shift_key_to_ascii(uint8_t key);
 
+char get_char_blocking();
+
 }
 
 #endif

kernel/src/keyboard.cpp

@@ -8,6 +8,8 @@
 #include "keyboard.hpp"
 #include "interrupts.hpp"
 #include "kernel_utils.hpp"
+#include "semaphore.hpp"
+#include "spinlock.hpp"
 
 namespace {
 
@@ -95,6 +97,9 @@ char input_buffer[BUFFER_SIZE];
 volatile uint8_t start;
 volatile uint8_t count;
 
+spinlock lock;
+semaphore sem;
+
 void keyboard_handler(const interrupt::syscall_regs&){
     auto key = static_cast<char>(in_byte(0x60));
 
@@ -107,15 +112,22 @@ void keyboard_handler(const interrupt::syscall_regs&){
     }
 }
 
-}
+} //end of anonymous namespace
 
 void keyboard::install_driver(){
     interrupt::register_irq_handler(1, keyboard_handler);
 
     start = 0;
     count = 0;
+
+    sem.init(0);
 }
 
+char blocking::get_char_blocking(){
+    //TODO
+}
+
+//TODO Once shell is user mode, can be removed
 char keyboard::get_char(){
     //Wait for the buffer to contains something
     while(count == 0){

kernel/src/system_calls.cpp

@@ -8,6 +8,7 @@
 #include "system_calls.hpp"
 #include "console.hpp"
 #include "scheduler.hpp"
+#include "keyboard.hpp"
 
 namespace {
 
@@ -23,6 +24,11 @@ void sc_print_digit(const interrupt::syscall_regs& regs){
     k_print(regs.rbx);
 }
 
+void sc_get_char(const interrupt::syscall_regs& regs){
+    auto c = keyboard::get_char_blocking();
+    //TODO
+}
+
 } //End of anonymous namespace
 
 void system_call_entry(const interrupt::syscall_regs& regs){
@@ -41,6 +47,10 @@ void system_call_entry(const interrupt::syscall_regs& regs){
             sc_print_digit(regs);
             break;
 
+        case 3:
+            sc_get_char(regs);
+            break;
+
         case 0x666:
             scheduler::kill_current_process(regs);
             break;