From e7fade3ac4559214ab0508dc54a71a3d1f522afb Mon Sep 17 00:00:00 2001
From: Daniel Hellstrom <daniel@gaisler.com>
Date: Mon, 28 Nov 2011 09:52:03 +0100
Subject: DRVMGR: added driver manager to cpukit/libdrvmgr

---
 cpukit/sapi/src/exinit.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

(limited to 'cpukit/sapi/src/exinit.c')

diff --git a/cpukit/sapi/src/exinit.c b/cpukit/sapi/src/exinit.c
index 235ba77c41..ba71ec465b 100644
--- a/cpukit/sapi/src/exinit.c
+++ b/cpukit/sapi/src/exinit.c
@@ -56,6 +56,10 @@
 #include <rtems/rtems/rtemsapi.h>
 #include <rtems/posix/posixapi.h>
 
+#ifdef RTEMS_DRVMGR_STARTUP
+  #include <drvmgr/drvmgr.h>
+#endif
+
 Objects_Information *_Internal_Objects[ OBJECTS_INTERNAL_CLASSES_LAST + 1 ];
 
 void rtems_initialize_data_structures(void)
@@ -161,6 +165,9 @@ void rtems_initialize_data_structures(void)
 
 void rtems_initialize_before_drivers(void)
 {
+  #ifdef RTEMS_DRVMGR_STARTUP
+  _DRV_Manager_initialization();
+  #endif
 
   #if defined(RTEMS_MULTIPROCESSING)
     _MPCI_Create_server();
@@ -182,8 +189,64 @@ void rtems_initialize_device_drivers(void)
    *  NOTE:  The MPCI may be build upon a device driver.
    */
 
+  #ifdef RTEMS_DRVMGR_STARTUP
+  /* BSPs has already registered their "root bus" driver in the
+   * bsp_predriver hook or so.
+   *
+   * Init Drivers to Level 1, constraints:
+   *   - Interrupts and system clock timer does not work.
+   *   - malloc() work, however other memory services may not
+   *     have been initialized yet.
+   *   - initializes most basic stuff
+   *
+   * Typical setup in Level 1:
+   *   - Find most devices in system, do PCI scan and configuration.
+   *   - Reset hardware if needed.
+   *   - Install IRQ driver
+   *   - Install Timer driver
+   *   - Install console driver and debug printk()
+   *   - Install extra memory.
+   */
+  _DRV_Manager_init_level(1);
+  bsp_driver_level_hook(1);
+  #endif
+
+  /* Initialize I/O drivers. 
+   *
+   * Driver Manager note:
+   * All drivers may not be registered yet. Drivers will dynamically
+   * be initialized when registered in level 2,3 and 4.
+   */
   _IO_Initialize_all_drivers();
 
+  #ifdef RTEMS_DRVMGR_STARTUP
+  /* Init Drivers to Level 2, constraints:
+   *  - Interrupts can be registered and enabled.
+   *  - System Clock is running
+   *  - Console may be used.
+   *
+   * This is typically where drivers are initialized
+   * for the first time.
+   */
+  _DRV_Manager_init_level(2);
+  bsp_driver_level_hook(2);
+
+  /* Init Drivers to Level 3 
+   * 
+   * This is typically where normal drivers are initialized
+   * for the second time, they may depend on other drivers
+   * API inited in level 2
+   */
+  _DRV_Manager_init_level(3);
+  bsp_driver_level_hook(3);
+
+  /* Init Drivers to Level 4,
+   * Init drivers that depend on services initialized in Level 3
+   */
+  _DRV_Manager_init_level(4);
+  bsp_driver_level_hook(4);
+  #endif
+
   #if defined(RTEMS_MULTIPROCESSING)
     if ( _System_state_Is_multiprocessing ) {
       _MPCI_Initialization();
-- 
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