1 files changed, 162 insertions, 0 deletions
diff --git a/u-boot/board/rmu/rmu.c b/u-boot/board/rmu/rmu.c
new file mode 100644
index 0000000..cd02b9c
--- /dev/null
+++ b/u-boot/board/rmu/rmu.c
@@ -0,0 +1,162 @@
+/*
+ * (C) Copyright 2000
+ * 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
+ */
+
+
+#include <common.h>
+#include <mpc8xx.h>
+
+/* ------------------------------------------------------------------------- */
+
+static long int dram_size (long int, long int *, long int);
+
+/* ------------------------------------------------------------------------- */
+
+#define	_NOT_USED_	0xFFFFCC25
+
+const uint sdram_table[] =
+{
+	/*
+	 * Single Read. (Offset 00h in UPMA RAM)
+	 */
+	0x0F03CC04, 0x00ACCC24, 0x1FF74C20, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/*
+	 * Burst Read. (Offset 08h in UPMA RAM)
+	 */
+	0x0F03CC04, 0x00ACCC24, 0x00FFCC20, 0x00FFCC20,
+	0x01FFCC20, 0x1FF74C20, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/*
+	 * Single Write. (Offset 18h in UPMA RAM)
+	 */
+	0x0F03CC02, 0x00AC0C24, 0x1FF74C25, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/*
+	 * Burst Write. (Offset 20h in UPMA RAM)
+	 */
+	0x0F03CC00, 0x00AC0C20, 0x00FFFC20, 0x00FFFC22,
+	0x01FFFC24, 0x1FF74C25, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/*
+	 * Refresh. (Offset 30h in UPMA RAM)
+	 * (Initialization code at 0x36)
+	 */
+	0x0FF0CC24, 0xFFFFCC24, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, 0xEFFB8C34, 0x0FF74C34,
+	0x0FFACCB4, 0x0FF5CC34, 0x0FFFCC34, 0x0FFFCCB4,
+
+	/*
+	 * Exception. (Offset 3Ch in UPMA RAM)
+	 */
+	0x0FEA8C34, 0x1FB54C34, 0xFFFFCC34, _NOT_USED_
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	puts ("Board: RMU\n") ;
+	return (0) ;
+}
+
+/* ------------------------------------------------------------------------- */
+
+phys_size_t initdram (int board_type)
+{
+	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+	long int size9;
+
+	upmconfig (UPMA, (uint *) sdram_table,
+		   sizeof (sdram_table) / sizeof (uint));
+
+	/* Refresh clock prescalar */
+	memctl->memc_mptpr = CONFIG_SYS_MPTPR;
+
+	memctl->memc_mar = 0x00000088;
+
+	/* Map controller banks 1 to the SDRAM bank */
+	memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
+	memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
+
+	memctl->memc_mamr = CONFIG_SYS_MAMR_9COL & (~(MAMR_PTAE));	/* no refresh yet */
+
+	udelay (200);
+
+	/* perform SDRAM initializsation sequence */
+
+	memctl->memc_mcr = 0x80002136;	/* SDRAM bank 0 */
+	udelay (1);
+
+	memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */
+
+	udelay (1000);
+
+	/* Check Bank 0 Memory Size,
+	 * 9 column mode
+	 */
+
+	size9 = dram_size (CONFIG_SYS_MAMR_9COL, (long *) SDRAM_BASE_PRELIM,
+			   SDRAM_MAX_SIZE);
+
+	/*
+	 * Final mapping:
+	 */
+
+	memctl->memc_or1 = ((-size9) & 0xFFFF0000) | CONFIG_SYS_OR_TIMING_SDRAM;
+	udelay (1000);
+
+	return (size9);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Check memory range for valid RAM. A simple memory test determines
+ * the actually available RAM size between addresses `base' and
+ * `base + maxsize'. Some (not all) hardware errors are detected:
+ * - short between address lines
+ * - short between data lines
+ */
+
+static long int dram_size (long int mamr_value, long int *base,
+			   long int maxsize)
+{
+	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+	volatile memctl8xx_t *memctl = &immap->im_memctl;
+
+	memctl->memc_mamr = mamr_value;
+
+	return (get_ram_size(base, maxsize));
+}