bsp/mpc55xx: Add optional EBI configuration

c/src/lib/libbsp/powerpc/mpc55xxevb/Makefile.am

@@ -78,6 +78,7 @@ libbsp_a_SOURCES += startup/reset.c
 libbsp_a_SOURCES += startup/restart.c
 libbsp_a_SOURCES += startup/idle-thread.c
 libbsp_a_SOURCES += startup/start-config-clock.c
+libbsp_a_SOURCES += startup/start-config-ebi.c
 libbsp_a_SOURCES += startup/start-config-ebi-cs.c
 libbsp_a_SOURCES += startup/start-config-ebi-cs-cal.c
 libbsp_a_SOURCES += startup/start-config-mmu.c

c/src/lib/libbsp/powerpc/mpc55xxevb/include/mpc55xx-config.h

@@ -93,8 +93,19 @@ extern BSP_START_DATA_SECTION const mpc55xx_clock_config
   mpc55xx_start_config_clock [];
 
 #ifdef MPC55XX_HAS_EBI
-  extern BSP_START_DATA_SECTION const struct
+  typedef struct {
-    EBI_CS_tag mpc55xx_start_config_ebi_cs [];
+    union EBI_MCR_tag ebi_mcr;
+    uint32_t siu_eccr_ebdf;
+  } mpc55xx_ebi_config;
+
+  extern BSP_START_DATA_SECTION const mpc55xx_ebi_config
+    mpc55xx_start_config_ebi [];
+
+  extern BSP_START_DATA_SECTION const size_t
+    mpc55xx_start_config_ebi_count [];
+
+  extern BSP_START_DATA_SECTION const struct EBI_CS_tag
+    mpc55xx_start_config_ebi_cs [];
 
   extern BSP_START_DATA_SECTION const size_t
     mpc55xx_start_config_ebi_cs_count [];

c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-config-ebi.c

@@ -0,0 +1,61 @@
+/**
+ * @file
+ *
+ * @ingroup mpc55xx
+ *
+ * @brief EBI configuration.
+ */
+
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <bsp/mpc55xx-config.h>
+
+#ifdef MPC55XX_HAS_EBI
+
+const mpc55xx_ebi_config mpc55xx_start_config_ebi [] = {
+  #if defined(MPC55XX_BOARD_GWLCFM)
+    {
+      .ebi_mcr = {
+        .B = {
+          .DBM = 1,
+          .AD_MUX = 1, /* use multiplexed bus */
+          .D16_31 = 1 /* use lower AD bus    */
+        }
+      },
+      .siu_eccr_ebdf = 4 - 1 /* use CLK/4 as bus clock */
+    }
+  #elif (defined(MPC55XX_BOARD_MPC5674FEVB) \
+    || defined(MPC55XX_BOARD_MPC5674F_ECU508)) \
+      && defined(MPC55XX_NEEDS_LOW_LEVEL_INIT)
+    {
+      .ebi_mcr = {
+        .B = {
+          .ACGE = 0,
+          .MDIS = 0,
+          .D16_31 = 1,
+          .AD_MUX = 0,
+          .DBM = 0
+        }
+      },
+      .siu_eccr_ebdf = 2 - 1
+    }
+  #endif
+};
+
+const size_t mpc55xx_start_config_ebi_count [] = {
+  RTEMS_ARRAY_SIZE(mpc55xx_start_config_ebi)
+};
+
+#endif /* MPC55XX_HAS_EBI */

c/src/lib/libbsp/powerpc/mpc55xxevb/startup/start-early.c

@@ -145,7 +145,6 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_siu(void)
 
 static BSP_START_TEXT_SECTION void mpc55xx_start_ebi_chip_select(void)
 {
-  #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT
   #ifdef MPC55XX_HAS_EBI
     size_t i = 0;
 
@@ -157,35 +156,17 @@ static BSP_START_TEXT_SECTION void mpc55xx_start_ebi_chip_select(void)
       EBI.CAL_CS [i] = mpc55xx_start_config_ebi_cal_cs [i];
     }
   #endif
-  #endif
 }
 
 static BSP_START_TEXT_SECTION void mpc55xx_start_ebi(void)
 {
-  #ifdef MPC55XX_NEEDS_LOW_LEVEL_INIT
+  #ifdef MPC55XX_HAS_EBI
-    #if defined(MPC55XX_BOARD_GWLCFM)
+    size_t i = 0;
-      /*
-       * init EBI for Muxed AD bus
-       */
-      EBI.MCR.B.DBM = 1;
-      EBI.MCR.B.AD_MUX = 1; /* use multiplexed bus */
-      EBI.MCR.B.D16_31 = 1; /* use lower AD bus    */
 
-      SIU.ECCR.B.EBDF = 3;  /* use CLK/4 as bus clock */
+    for (i = 0; i < mpc55xx_start_config_ebi_count [0]; ++i) {
-    #elif defined(MPC55XX_BOARD_MPC5674FEVB) \
+      SIU.ECCR.B.EBDF = mpc55xx_start_config_ebi [i].siu_eccr_ebdf;
-      || defined(MPC55XX_BOARD_MPC5674F_ECU508)
+      EBI.MCR.R = mpc55xx_start_config_ebi [i].ebi_mcr.R;
-      union EBI_MCR_tag mcr = {
-        .B = {
-          .ACGE = 0,
-          .MDIS = 0,
-          .D16_31 = 1,
-          .AD_MUX = 0,
-          .DBM = 0
     }
-      };
-
-      EBI.MCR.R = mcr.R;
-    #endif
   #endif
 }