Integrate flaterm terminal

kernel/hal/hal.h

@@ -2,15 +2,15 @@
 #define KERNEL_HAL_HAL_H_
 
 #include <stdint.h>
-
-#include "util.h"
+#include <stddef.h>
 
 __attribute__((noreturn)) void hal_hang(void);
 
 void hal_init(void);
 void hal_intr_disable(void);
 void hal_intr_enable(void);
-void hal_memset(void *mem, uint8_t v, uint32_t size);
+void *hal_memset(void *p, int c, size_t n);
+void *hal_memcpy(void *dst, const void *src, size_t n);
 
 #if defined(__x86_64__)
 # define HAL_PAGE_SIZE 0x1000

kernel/hal/util.c

@@ -1,9 +1,16 @@
 #include <stdint.h>
+#include <stddef.h>
 #include "hal.h"
 
-void hal_memset(void *mem, uint8_t v, uint32_t size) {
-  uint8_t *mem1 = mem;
-  for (uint32_t i = 0; i < size; i++) {
-    mem1[i] = v;
-  }
+void *hal_memset(void *p, int c, size_t n) {
+  char *cp = p;
+  for (size_t i = 0; i < n; i++) cp[i] = c;
+  return p;
+}
+
+void *hal_memcpy(void *dst, const void *src, size_t n) {
+  char *a = dst;
+  const char *b = src;
+  for (size_t i = 0; i < n; i++) a[i] = b[i];
+  return dst;
 }

kernel/hal/util.h

@@ -1,6 +0,0 @@
-#ifndef HAL_UTIL_H_
-#define HAL_UTIL_H_
-
-#define HAL_MEMSET(m, v, n) hal_memset((void *)(m), (v), (n))
-
-#endif // HAL_UTIL_H_

kernel/hal/x86_64/gdt.c

@@ -68,7 +68,7 @@ void gdt_init(void) {
   uint64_t base = gdt_curretbase();
   curgdt = (ExtendedGdt *)base;
 
-  HAL_MEMSET(&tss, 0, sizeof(tss));
+  hal_memset(&tss, 0, sizeof(tss));
   tss.iopb_off = sizeof(tss);
 
   uint64_t tss_base = (uint64_t)&tss;

kernel/hal/x86_64/serial.c

@@ -1,6 +1,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "io.h"
+#include "putchar.h"
 
 #define SERIAL_PORT 0x3f8
 
@@ -42,7 +43,9 @@ bool serial_init(void) {
   return true;
 }
 
-// For printf library
-void putchar_(char c) {
-  serial_write(c);
-}
+#if PUTCHAR_ == PUTCHAR_SERIAL
+  // For printf library
+  void putchar_(char c) {
+    serial_write(c);
+  }
+#endif