Initial revision

1 files changed, 133 insertions, 0 deletions

diff --git a/lib_ppc/bat_rw.c b/lib_ppc/bat_rw.c
new file mode 100644
index 0000000..912efa7
--- /dev/null
+++ b/lib_ppc/bat_rw.c
@@ -0,0 +1,133 @@
+/*
+ * (C) Copyright 2002
+ * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
+ *
+ * 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 <asm/processor.h>
+#include <asm/mmu.h>
+
+int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
+{
+	switch (bat) {
+	case IBAT0:
+		mtspr (IBAT0L, lower);
+		mtspr (IBAT0U, upper);
+		break;
+
+	case IBAT1:
+		mtspr (IBAT1L, lower);
+		mtspr (IBAT1U, upper);
+		break;
+
+	case IBAT2:
+		mtspr (IBAT2L, lower);
+		mtspr (IBAT2U, upper);
+		break;
+
+	case IBAT3:
+		mtspr (IBAT3L, lower);
+		mtspr (IBAT3U, upper);
+		break;
+
+	case DBAT0:
+		mtspr (DBAT0L, lower);
+		mtspr (DBAT0U, upper);
+		break;
+
+	case DBAT1:
+		mtspr (DBAT1L, lower);
+		mtspr (DBAT1U, upper);
+		break;
+
+	case DBAT2:
+		mtspr (DBAT2L, lower);
+		mtspr (DBAT2U, upper);
+		break;
+
+	case DBAT3:
+		mtspr (DBAT3L, lower);
+		mtspr (DBAT3U, upper);
+		break;
+
+	default:
+		return (-1);
+	}
+
+	return (0);
+}
+
+int read_bat (ppc_bat_t bat, unsigned long *upper, unsigned long *lower)
+{
+	unsigned long register u;
+	unsigned long register l;
+
+	switch (bat) {
+	case IBAT0:
+		l = mfspr (IBAT0L);
+		u = mfspr (IBAT0U);
+		break;
+
+	case IBAT1:
+		l = mfspr (IBAT1L);
+		u = mfspr (IBAT1U);
+		break;
+
+	case IBAT2:
+		l = mfspr (IBAT2L);
+		u = mfspr (IBAT2U);
+		break;
+
+	case IBAT3:
+		l = mfspr (IBAT3L);
+		u = mfspr (IBAT3U);
+		break;
+
+	case DBAT0:
+		l = mfspr (DBAT0L);
+		u = mfspr (DBAT0U);
+		break;
+
+	case DBAT1:
+		l = mfspr (DBAT1L);
+		u = mfspr (DBAT1U);
+		break;
+
+	case DBAT2:
+		l = mfspr (DBAT2L);
+		u = mfspr (DBAT2U);
+		break;
+
+	case DBAT3:
+		l = mfspr (DBAT3L);
+		u = mfspr (DBAT3U);
+		break;
+
+	default:
+		return (-1);
+	}
+
+	*upper = u;
+	*lower = l;
+
+	return (0);
+}