1 files changed, 184 insertions, 0 deletions
diff --git a/board/rmu/rmu.c b/board/rmu/rmu.c
new file mode 100644
index 0000000000..c9925d09a3
--- /dev/null
+++ b/board/rmu/rmu.c
@@ -0,0 +1,184 @@
+/*
+ * (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, 0x0FFCC34, 0x0FFFCCB4,
+
+	/*
+	 * Exception. (Offset 3Ch in UPMA RAM)
+	 */
+	0x0FEA8C34, 0x1FB54C34, 0xFFFFCC34, _NOT_USED_
+};
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Check Board Identity:
+ */
+
+int checkboard (void)
+{
+	puts ("Board: RMU\n") ;
+	return (0) ;
+}
+
+/* ------------------------------------------------------------------------- */
+
+long int initdram (int board_type)
+{
+    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
+    volatile memctl8xx_t *memctl = &immap->im_memctl;
+    long int size10 ;
+
+    upmconfig(UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
+
+	/* Refresh clock prescalar */
+    memctl->memc_mptpr = CFG_MPTPR ;
+
+    memctl->memc_mar  = 0x00000088;
+
+	/* Map controller banks 1 to the SDRAM bank */
+    memctl->memc_or1 = CFG_OR1_PRELIM;
+    memctl->memc_br1 = CFG_BR1_PRELIM;
+
+    memctl->memc_mamr = CFG_MAMR_10COL & (~(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
+	 * try 10 column mode
+	 */
+
+	size10 = dram_size (CFG_MAMR_10COL, (ulong *)SDRAM_BASE_PRELIM, SDRAM_MAX_SIZE) ;
+
+    return (size10);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * 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 *)CFG_IMMR;
+    volatile memctl8xx_t *memctl = &immap->im_memctl;
+    volatile long int	 *addr;
+    ulong		  cnt, val;
+    ulong		  save[32];	/* to make test non-destructive */
+    unsigned char	  i = 0;
+
+    memctl->memc_mamr = mamr_value;
+
+    for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
+	addr = base + cnt;	/* pointer arith! */
+
+	save[i++] = *addr;
+	*addr = ~cnt;
+    }
+
+    /* write 0 to base address */
+    addr = base;
+    save[i] = *addr;
+    *addr = 0;
+
+    /* check at base address */
+    if ((val = *addr) != 0) {
+	*addr = save[i];
+	return (0);
+    }
+
+    for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1) {
+	addr = base + cnt;	/* pointer arith! */
+
+	val = *addr;
+	*addr = save[--i];
+
+	if (val != (~cnt)) {
+	    return (cnt * sizeof(long));
+	}
+    }
+    return (maxsize);
+}