From c148f24c15743a02e855636e6bed013bd121f7f2 Mon Sep 17 00:00:00 2001
From: Becky Bruce <becky.bruce@freescale.com>
Date: Thu, 15 May 2008 21:29:04 -0500
Subject: [PATCH] PPC: Change lib_ppc/bat_rw.c to use high bats

Currently, this code only deals with BATs 0-3, which makes
it useless on systems that support BATs 4-7.  Add the
support for these registers.

Signed-off-by: Becky Bruce <Becky.bruce@freescale.com>
---
 include/asm-ppc/mmu.h |   6 ++-
 lib_ppc/bat_rw.c      | 132 +++++++++++++++++++++++++++++++++++---------------
 2 files changed, 97 insertions(+), 41 deletions(-)

diff --git a/include/asm-ppc/mmu.h b/include/asm-ppc/mmu.h
index 4f78ca7..59f17de 100644
--- a/include/asm-ppc/mmu.h
+++ b/include/asm-ppc/mmu.h
@@ -140,7 +140,11 @@ extern void _tlbia(void);		/* invalidate all TLB entries */
 
 typedef enum {
 	IBAT0 = 0, IBAT1, IBAT2, IBAT3,
-	DBAT0, DBAT1, DBAT2, DBAT3
+	DBAT0, DBAT1, DBAT2, DBAT3,
+#ifdef CONFIG_HIGH_BATS
+	IBAT4, IBAT5, IBAT6, IBAT7,
+	DBAT4, DBAT5, DBAT6, DBAT7
+#endif
 } ppc_bat_t;
 
 extern int read_bat(ppc_bat_t bat, unsigned long *upper, unsigned long *lower);
diff --git a/lib_ppc/bat_rw.c b/lib_ppc/bat_rw.c
index 912efa7..5f01a63 100644
--- a/lib_ppc/bat_rw.c
+++ b/lib_ppc/bat_rw.c
@@ -29,46 +29,72 @@
 int write_bat (ppc_bat_t bat, unsigned long upper, unsigned long lower)
 {
 	switch (bat) {
+	case DBAT0:
+		mtspr (DBAT0L, lower);
+		mtspr (DBAT0U, upper);
+		break;
 	case IBAT0:
 		mtspr (IBAT0L, lower);
 		mtspr (IBAT0U, upper);
 		break;
-
+	case DBAT1:
+		mtspr (DBAT1L, lower);
+		mtspr (DBAT1U, upper);
+		break;
 	case IBAT1:
 		mtspr (IBAT1L, lower);
 		mtspr (IBAT1U, upper);
 		break;
-
+	case DBAT2:
+		mtspr (DBAT2L, lower);
+		mtspr (DBAT2U, upper);
+		break;
 	case IBAT2:
 		mtspr (IBAT2L, lower);
 		mtspr (IBAT2U, upper);
 		break;
-
+	case DBAT3:
+		mtspr (DBAT3L, lower);
+		mtspr (DBAT3U, upper);
+		break;
 	case IBAT3:
 		mtspr (IBAT3L, lower);
 		mtspr (IBAT3U, upper);
 		break;
-
-	case DBAT0:
-		mtspr (DBAT0L, lower);
-		mtspr (DBAT0U, upper);
+#ifdef CONFIG_HIGH_BATS
+	case DBAT4:
+		mtspr (DBAT4L, lower);
+		mtspr (DBAT4U, upper);
 		break;
-
-	case DBAT1:
-		mtspr (DBAT1L, lower);
-		mtspr (DBAT1U, upper);
+	case IBAT4:
+		mtspr (IBAT4L, lower);
+		mtspr (IBAT4U, upper);
 		break;
-
-	case DBAT2:
-		mtspr (DBAT2L, lower);
-		mtspr (DBAT2U, upper);
+	case DBAT5:
+		mtspr (DBAT5L, lower);
+		mtspr (DBAT5U, upper);
 		break;
-
-	case DBAT3:
-		mtspr (DBAT3L, lower);
-		mtspr (DBAT3U, upper);
+	case IBAT5:
+		mtspr (IBAT5L, lower);
+		mtspr (IBAT5U, upper);
 		break;
-
+	case DBAT6:
+		mtspr (DBAT6L, lower);
+		mtspr (DBAT6U, upper);
+		break;
+	case IBAT6:
+		mtspr (IBAT6L, lower);
+		mtspr (IBAT6U, upper);
+		break;
+	case DBAT7:
+		mtspr (DBAT7L, lower);
+		mtspr (DBAT7U, upper);
+		break;
+	case IBAT7:
+		mtspr (IBAT7L, lower);
+		mtspr (IBAT7U, upper);
+		break;
+#endif
 	default:
 		return (-1);
 	}
@@ -82,46 +108,72 @@ int read_bat (ppc_bat_t bat, unsigned long *upper, unsigned long *lower)
 	unsigned long register l;
 
 	switch (bat) {
+	case DBAT0:
+		l = mfspr (DBAT0L);
+		u = mfspr (DBAT0U);
+		break;
 	case IBAT0:
 		l = mfspr (IBAT0L);
 		u = mfspr (IBAT0U);
 		break;
-
+	case DBAT1:
+		l = mfspr (DBAT1L);
+		u = mfspr (DBAT1U);
+		break;
 	case IBAT1:
 		l = mfspr (IBAT1L);
 		u = mfspr (IBAT1U);
 		break;
-
+	case DBAT2:
+		l = mfspr (DBAT2L);
+		u = mfspr (DBAT2U);
+		break;
 	case IBAT2:
 		l = mfspr (IBAT2L);
 		u = mfspr (IBAT2U);
 		break;
-
+	case DBAT3:
+		l = mfspr (DBAT3L);
+		u = mfspr (DBAT3U);
+		break;
 	case IBAT3:
 		l = mfspr (IBAT3L);
 		u = mfspr (IBAT3U);
 		break;
-
-	case DBAT0:
-		l = mfspr (DBAT0L);
-		u = mfspr (DBAT0U);
+#ifdef CONFIG_HIGH_BATS
+	case DBAT4:
+		l = mfspr (DBAT4L);
+		u = mfspr (DBAT4U);
 		break;
-
-	case DBAT1:
-		l = mfspr (DBAT1L);
-		u = mfspr (DBAT1U);
+	case IBAT4:
+		l = mfspr (IBAT4L);
+		u = mfspr (IBAT4U);
 		break;
-
-	case DBAT2:
-		l = mfspr (DBAT2L);
-		u = mfspr (DBAT2U);
+	case DBAT5:
+		l = mfspr (DBAT5L);
+		u = mfspr (DBAT5U);
 		break;
-
-	case DBAT3:
-		l = mfspr (DBAT3L);
-		u = mfspr (DBAT3U);
+	case IBAT5:
+		l = mfspr (IBAT5L);
+		u = mfspr (IBAT5U);
 		break;
-
+	case DBAT6:
+		l = mfspr (DBAT6L);
+		u = mfspr (DBAT6U);
+		break;
+	case IBAT6:
+		l = mfspr (IBAT6L);
+		u = mfspr (IBAT6U);
+		break;
+	case DBAT7:
+		l = mfspr (DBAT7L);
+		u = mfspr (DBAT7U);
+		break;
+	case IBAT7:
+		l = mfspr (IBAT7L);
+		u = mfspr (IBAT7U);
+		break;
+#endif
 	default:
 		return (-1);
 	}
-- 
2.7.4