lcd: Provide an API to access LCD parameters

[karo-tx-uboot.git] / include / os.h

diff --git a/include/os.h b/include/os.h
index f3af4f0e0e46e80ddd24efd98a5e5274b20a8204..699682a4089beed0869c88fbf5974243aa647221 100644 (file)
--- a/include/os.h
+++ b/include/os.h
@@ -1,4 +1,9 @@
 /*
+ * Operating System Interface
+ *
+ * This provides access to useful OS routines for the sandbox architecture.
+ * They are kept in a separate file so we can include system headers.
+ *
  * Copyright (c) 2011 The Chromium OS Authors.
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -19,11 +24,10 @@
  * MA 02111-1307 USA
  */
 
-/*
- * Operating System Interface
- *
- * This provides access to useful OS routines from the sandbox architecture
- */
+#ifndef __OS_H__
+#define __OS_H__
+
+struct sandbox_state;
 
 /**
  * Access to the OS read() system call
@@ -45,6 +49,21 @@ ssize_t os_read(int fd, void *buf, size_t count);
  */
 ssize_t os_write(int fd, const void *buf, size_t count);
 
+/**
+ * Access to the OS lseek() system call
+ *
+ * \param fd   File descriptor as returned by os_open()
+ * \param offset       File offset (based on whence)
+ * \param whence       Position offset is relative to (see below)
+ * \return new file offset
+ */
+off_t os_lseek(int fd, off_t offset, int whence);
+
+/* Defines for "whence" in os_lseek() */
+#define OS_SEEK_SET    0
+#define OS_SEEK_CUR    1
+#define OS_SEEK_END    2
+
 /**
  * Access to the OS open() system call
  *
@@ -54,6 +73,12 @@ ssize_t os_write(int fd, const void *buf, size_t count);
  */
 int os_open(const char *pathname, int flags);
 
+#define OS_O_RDONLY    0
+#define OS_O_WRONLY    1
+#define OS_O_RDWR      2
+#define OS_O_MASK      3       /* Mask for read/write flags */
+#define OS_O_CREAT     0100
+
 /**
  * Access to the OS close() system call
  *
@@ -70,7 +95,7 @@ int os_close(int fd);
  *
  * @param exit_code    exit code for U-Boot
  */
-void os_exit(int exit_code);
+void os_exit(int exit_code) __attribute__((noreturn));
 
 /**
  * Put tty into raw mode to mimic serial console better
@@ -98,3 +123,17 @@ void os_usleep(unsigned long usec);
  * \return A monotonic increasing time scaled in nano seconds
  */
 u64 os_get_nsec(void);
+
+/**
+ * Parse arguments and update sandbox state.
+ *
+ * @param state                Sandbox state to update
+ * @param argc         Argument count
+ * @param argv         Argument vector
+ * @return 0 if ok, and program should continue;
+ *     1 if ok, but program should stop;
+ *     -1 on error: program should terminate.
+ */
+int os_parse_args(struct sandbox_state *state, int argc, char *argv[]);
+
+#endif