Merge pull request #30 from alkuzin/feature/add-some-auxilar-functions

Feature/add some auxilar functions

.gitignore

@@ -57,3 +57,6 @@ dkms.conf
 /isodir
 serial.log
 *.cpio
+
+# Auxilar files
+.vscode/

kernel/arch/amd64/cpu/control.c

@@ -64,14 +64,14 @@ void cpu_interrupt_lock_force_release() {
 }
 
 void cpu_halt() {
-	asm volatile ("hlt");
+	asm volatile("hlt");
 }
 
 void cpu_full_halt() {
-    if (unlikely(!reflock_is_locked(&lock)))
-        reflock_acquire(&lock);
-    else
-        __cpu_disable_interrupts();
-    lock.allow_force_unlock = false;
-    cpu_halt();
+	if (unlikely(!reflock_is_locked(&lock)))
+		reflock_acquire(&lock);
+	else
+		__cpu_disable_interrupts();
+	lock.allow_force_unlock = false;
+	cpu_halt();
 }

kernel/include/kreflock.h

@@ -34,11 +34,11 @@ typedef struct {
 } reflock_t;
 
 #define NEW_REFLOCK(_on_lock, _on_unlock, _strict, _allow_force)               \
-	{                                                                          \
-		_on_lock, _on_unlock, _strict, _allow_force, {                         \
-			0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0                                 \
-		}                                                                      \
-	}
+	{ _on_lock,                                                                \
+	  _on_unlock,                                                              \
+	  _strict,                                                                 \
+	  _allow_force,                                                            \
+	  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }
 
 void reflock_make(reflock_t *lock);
 bool reflock_validate_magic(reflock_t *lock);

kernel/include/kstdlib.h

@@ -1,9 +1,75 @@
 #ifndef __K_STDLIB
 #define __K_STDLIB
 
+#include <ktypes.h>
+
 #define unlikely(x) __builtin_expect(x, 0)
 #define likely(x) __builtin_expect(x, 1)
 
+/** @brief Ignore unused variable/static function.*/
 #define IGNORE_UNUSED(x) ((void)x)
 
-#endif
+#define BITS_PER_BYTE 8
+
+/**
+ * @brief Convert bits to bytes.
+ *
+ * @param [in] n - given number of bits.
+ * @return number of bytes needed for containing n bits.
+ */
+static inline usize bits_to_bytes(usize n) {
+	// assuming that a byte contains 8 bits
+	return (n + 7) >> 3;
+}
+
+/**
+ * @brief Convert bytes to bits.
+ *
+ * @param [in] n - given number of bytes.
+ * @return number of bits in n bytes.
+ */
+static inline usize bytes_to_bits(usize n) {
+	// assuming that a byte contains 8 bits
+	return n << 3;
+}
+
+/**
+ * @brief Get number of bits in value.
+ *
+ * @param [in] x - given value to count.
+ * @return number of bits in value.
+ */
+#define BITS_PER_TYPE(x) (bytes_to_bits(sizeof(x)))
+
+/**
+ * @brief Set the specific bit of given value.
+ *
+ * @param [out] value - given value to change.
+ * @param [in] pos - given bit position to set.
+ */
+static inline void set_bit(u32 *value, i32 pos) {
+	*value |= (1U << pos);
+}
+
+/**
+ * @brief Clear the specific bit of given value.
+ *
+ * @param [out] value - given value to change.
+ * @param [in] pos - given bit position to clear.
+ */
+static inline void clear_bit(u32 *value, i32 pos) {
+	*value &= ~(1U << pos);
+}
+
+/**
+ * @brief Get the specific bit of given value.
+ *
+ * @param [in] value - given value to test.
+ * @param [in] pos - given bit position to test.
+ * @return true if the bit is set, false otherwise.
+ */
+static inline bool test_bit(u32 value, i32 pos) {
+	return (value & (1U << pos)) != 0;
+}
+
+#endif /* __K_STDLIB */

kernel/include/ktypes.h

@@ -0,0 +1,31 @@
+#ifndef __K_TYPES
+#define __K_TYPES
+
+#include <stdbool.h>
+#include <stdint.h>
+
+// unsigned types
+typedef uint64_t u64;
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t u8;
+
+// signed types
+typedef int64_t i64;
+typedef int32_t i32;
+typedef int16_t i16;
+typedef int8_t i8;
+
+// floating point types
+typedef double f64;
+typedef float f32;
+
+// other
+typedef i64 ssize;
+typedef u64 usize;
+
+// memory manager
+typedef u32 phys_addr_t;
+typedef u32 virt_addr_t;
+
+#endif /* __K_TYPES */

kernel/include/sys/panic.h

@@ -4,7 +4,8 @@
 #include <stdint.h>
 
 void __attribute__((noreturn)) panic_int(uint8_t int_no, const char *msg);
-void __attribute__((noreturn)) panic(const char *msg, const char *func, const int line);
+void __attribute__((noreturn)) panic(const char *msg, const char *func,
+                                     const int line);
 
 #define PANIC(msg) panic(msg, __func__, __LINE__)
 

kernel/kernel.c

@@ -1,7 +1,7 @@
 #include "khal.h"
-#include <stdint.h>
 #include "kstring.h"
 #include "sys/panic.h"
+#include <stdint.h>
 
 int multiboot2_init(uint64_t *addr, uint32_t magic);
 

kernel/klibc/printf.c

@@ -1,6 +1,6 @@
 #include "khal.h"
-#include <stdint.h>
 #include <stdarg.h>
+#include <stdint.h>
 
 static char *itoa(uint64_t value, char *buf, uint8_t base) {
 	char *ptr = buf;

kernel/multiboot2.c

@@ -1,7 +1,7 @@
 #include "khal.h"
-#include <stdint.h>
 #include "kstdlib.h"
 #include <3rd/multiboot2.h>
+#include <stdint.h>
 
 #define CHECK_FLAG(flags, bit) ((flags) & (1 << (bit)))
 

kernel/sys/panic.c

@@ -7,7 +7,7 @@
 
 void __attribute__((noreturn)) panic_int(uint8_t int_no, const char *msg) {
 	cpu_interrupt_lock_acquire();
-	
+
 	serial_printf("\n\rKernel panic (in interrupt) [INT=0x%02X] - %s\n", int_no,
 	              msg);
 	cpu_state_print();
@@ -15,7 +15,8 @@ void __attribute__((noreturn)) panic_int(uint8_t int_no, const char *msg) {
 	for (;;) cpu_halt();
 }
 
-void __attribute__((noreturn)) panic(const char *msg, const char *func, const int line) {
+void __attribute__((noreturn)) panic(const char *msg, const char *func,
+                                     const int line) {
 	cpu_interrupt_lock_acquire();
 
 	serial_printf("\n\rKernel panic - %s in %s:%d\n", msg, func, line);