initial commit of lk (little kernel) project
diff --git a/include/stdlib.h b/include/stdlib.h
new file mode 100644
index 0000000..fb1e1de
--- /dev/null
+++ b/include/stdlib.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __STDLIB_H
+#define __STDLIB_H
+
+#include <sys/types.h>
+#include <stddef.h>
+#include <malloc.h>
+#include <printf.h>
+#include <endian.h>
+#include <arch/defines.h>
+
+int atoi(const char *num);
+unsigned int atoui(const char *num);
+long atol(const char *num);
+unsigned long atoul(const char *num);
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+
+#define ROUNDUP(a, b) (((a) + ((b)-1)) & ~((b)-1))
+#define ROUNDDOWN(a, b) ((a) & ~((b)-1))
+
+/* allocate a buffer on the stack aligned and padded to the cpu's cache line size */
+#define STACKBUF_DMA_ALIGN(var, size) \
+ uint8_t __##var[(size) + CACHE_LINE]; uint8_t *var = (uint8_t *)(ROUNDUP((addr_t)__##var, CACHE_LINE))
+
+#endif
+