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-rw-r--r--arch/ppc/cpu/mpc8xx/commproc.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/ppc/cpu/mpc8xx/commproc.c b/arch/ppc/cpu/mpc8xx/commproc.c
new file mode 100644
index 0000000..a87a0dc
--- /dev/null
+++ b/arch/ppc/cpu/mpc8xx/commproc.c
@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2000-2002
+ * 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 <commproc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SYS_ALLOC_DPRAM
+
+int dpram_init (void)
+{
+ /* Reclaim the DP memory for our use. */
+ gd->dp_alloc_base = CPM_DATAONLY_BASE;
+ gd->dp_alloc_top = CPM_DATAONLY_BASE + CPM_DATAONLY_SIZE;
+
+ return (0);
+}
+
+/* Allocate some memory from the dual ported ram. We may want to
+ * enforce alignment restrictions, but right now everyone is a good
+ * citizen.
+ */
+uint dpram_alloc (uint size)
+{
+ uint addr = gd->dp_alloc_base;
+
+ if ((gd->dp_alloc_base + size) >= gd->dp_alloc_top)
+ return (CPM_DP_NOSPACE);
+
+ gd->dp_alloc_base += size;
+
+ return addr;
+}
+
+uint dpram_base (void)
+{
+ return gd->dp_alloc_base;
+}
+
+/* Allocate some memory from the dual ported ram. We may want to
+ * enforce alignment restrictions, but right now everyone is a good
+ * citizen.
+ */
+uint dpram_alloc_align (uint size, uint align)
+{
+ uint addr, mask = align - 1;
+
+ addr = (gd->dp_alloc_base + mask) & ~mask;
+
+ if ((addr + size) >= gd->dp_alloc_top)
+ return (CPM_DP_NOSPACE);
+
+ gd->dp_alloc_base = addr + size;
+
+ return addr;
+}
+
+uint dpram_base_align (uint align)
+{
+ uint mask = align - 1;
+
+ return (gd->dp_alloc_base + mask) & ~mask;
+}
+#endif /* CONFIG_SYS_ALLOC_DPRAM */
+
+#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
+
+void post_word_store (ulong a)
+{
+ volatile void *save_addr =
+ ((immap_t *) CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + CPM_POST_WORD_ADDR;
+
+ *(volatile ulong *) save_addr = a;
+}
+
+ulong post_word_load (void)
+{
+ volatile void *save_addr =
+ ((immap_t *) CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + CPM_POST_WORD_ADDR;
+
+ return *(volatile ulong *) save_addr;
+}
+
+#endif /* CONFIG_POST || CONFIG_LOGBUFFER*/
+
+#ifdef CONFIG_BOOTCOUNT_LIMIT
+
+void bootcount_store (ulong a)
+{
+ volatile ulong *save_addr =
+ (volatile ulong *)( ((immap_t *) CONFIG_SYS_IMMR)->im_cpm.cp_dpmem +
+ CPM_BOOTCOUNT_ADDR );
+
+ save_addr[0] = a;
+ save_addr[1] = BOOTCOUNT_MAGIC;
+}
+
+ulong bootcount_load (void)
+{
+ volatile ulong *save_addr =
+ (volatile ulong *)( ((immap_t *) CONFIG_SYS_IMMR)->im_cpm.cp_dpmem +
+ CPM_BOOTCOUNT_ADDR );
+
+ if (save_addr[1] != BOOTCOUNT_MAGIC)
+ return 0;
+ else
+ return save_addr[0];
+}
+
+#endif /* CONFIG_BOOTCOUNT_LIMIT */