MPC512x: factor out common code

Now that we have 3 boards for the MPC512x it turns out that they all
use the very same fixed_sdram() code.

This patch factors out this common code into cpu/mpc512x/fixed_sdram.c
and adds a new header file, include/asm-ppc/mpc512x.h, with some
macros, inline functions and prototype definitions specific to MPC512x
systems.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Reinhard Arlt <reinhard.arlt@esd-electronics.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/include/asm-ppc/mpc512x.h b/include/asm-ppc/mpc512x.h
new file mode 100644
index 0000000000..20456f52f7
--- /dev/null
+++ b/include/asm-ppc/mpc512x.h
@@ -0,0 +1,57 @@
+/*
+ * include/asm-ppc/mpc512x.h
+ *
+ * Prototypes, etc. for the Freescale MPC512x embedded cpu chips
+ *
+ * 2009 (C) Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef __ASMPPC_MPC512X_H
+#define __ASMPPC_MPC512X_H
+
+/*
+ * macros for manipulating CSx_START/STOP
+ */
+#define CSAW_START(start)	((start) & 0xFFFF0000)
+#define CSAW_STOP(start, size)	(((start) + (size) - 1) >> 16)
+
+/*
+ * Inlines
+ */
+
+/*
+ * According to MPC5121e RM, configuring local access windows should
+ * be followed by a dummy read of the config register that was
+ * modified last and an isync.
+ */
+static inline void sync_law(volatile void *addr)
+{
+	in_be32(addr);
+	__asm__ __volatile__ ("isync");
+}
+
+/*
+ * Prototypes
+ */
+extern long int fixed_sdram(void);
+extern int mpc5121_diu_init(void);
+extern void ide_set_reset(int idereset);
+
+#endif /* __ASMPPC_MPC512X_H */