X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fcpu%2Fmpc86xx%2Fstart.S;h=ef80ecf6e53801c31ecc3e31cb063925e9d2876c;hb=1605cc9e1bf193021e86048295148c45a185410d;hp=32896d49e1a82a57715a3eca8bc61bef1a9c96b7;hpb=9023ae305919d0aecb4a22726b9d08c6b08189d7;p=u-boot

diff --git a/arch/powerpc/cpu/mpc86xx/start.S b/arch/powerpc/cpu/mpc86xx/start.S
index 32896d49e1..ef80ecf6e5 100644
--- a/arch/powerpc/cpu/mpc86xx/start.S
+++ b/arch/powerpc/cpu/mpc86xx/start.S
@@ -1,5 +1,5 @@
 /*
- * Copyright 2004, 2007 Freescale Semiconductor.
+ * Copyright 2004, 2007, 2011 Freescale Semiconductor.
  * Srikanth Srinivasan <srikanth.srinivaan@freescale.com>
  *
  * See file CREDITS for list of people who contributed to this
@@ -322,6 +322,73 @@ invalidate_bats:
 	sync
 	blr
 
+#define CONFIG_BAT_PAIR(n) \
+	lis	r4, CONFIG_SYS_IBAT##n##L@h; 		\
+	ori	r4, r4, CONFIG_SYS_IBAT##n##L@l; 	\
+	lis	r3, CONFIG_SYS_IBAT##n##U@h; 		\
+	ori	r3, r3, CONFIG_SYS_IBAT##n##U@l; 	\
+	mtspr	IBAT##n##L, r4; 			\
+	mtspr	IBAT##n##U, r3; 			\
+	lis	r4, CONFIG_SYS_DBAT##n##L@h; 		\
+	ori	r4, r4, CONFIG_SYS_DBAT##n##L@l; 	\
+	lis	r3, CONFIG_SYS_DBAT##n##U@h; 		\
+	ori	r3, r3, CONFIG_SYS_DBAT##n##U@l; 	\
+	mtspr	DBAT##n##L, r4;				\
+	mtspr	DBAT##n##U, r3;
+
+/*
+ * setup_bats:
+ *
+ * Set up the final BAT registers now that setup is done.
+ *
+ * Assumes that:
+ *	1) Address translation is enabled upon entry
+ *	2) The boot rom is still accessible via 1:1 translation
+ */
+	.globl setup_bats
+setup_bats:
+	mflr	r5
+	sync
+
+	/*
+	 * When we disable address translation, we will get 1:1 (VA==PA)
+	 * translation.  The only place we know for sure is safe for that is
+	 * the bootrom where we originally started out.  Pop back into there.
+	 */
+	lis	r4, CONFIG_SYS_MONITOR_BASE_EARLY@h
+	ori	r4, r4, CONFIG_SYS_MONITOR_BASE_EARLY@l
+	addi	r4, r4, trans_disabled - _start + EXC_OFF_SYS_RESET
+
+	/* disable address translation */
+	mfmsr	r3
+	rlwinm	r3, r3, 0, 28, 25
+	mtspr	SRR0, r4
+	mtspr	SRR1, r3
+	rfi
+
+trans_disabled:
+#if defined(CONFIG_SYS_DBAT0U) && defined(CONFIG_SYS_DBAT0L) \
+	&& defined(CONFIG_SYS_IBAT0U) && defined(CONFIG_SYS_IBAT0L)
+	CONFIG_BAT_PAIR(0)
+#endif
+	CONFIG_BAT_PAIR(1)
+	CONFIG_BAT_PAIR(2)
+	CONFIG_BAT_PAIR(3)
+	CONFIG_BAT_PAIR(4)
+	CONFIG_BAT_PAIR(5)
+	CONFIG_BAT_PAIR(6)
+	CONFIG_BAT_PAIR(7)
+
+	sync
+	isync
+
+	/* Turn translation back on and return */
+	mfmsr	r3
+	ori	r3, r3, (MSR_IR | MSR_DR)
+	mtspr	SPRN_SRR0,r5
+	mtspr	SPRN_SRR1,r3
+	rfi
+
 /*
  * early_bats:
  *