ppc/85xx: Introduce low level write_tlb function
Factor out the code we use to actually write a tlb entry.
set_tlb is a logical view of the TLB while write_tlb is a low level
matching the MAS registers.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S
index 7a23b4f..eeee7a9 100644
--- a/cpu/mpc85xx/start.S
+++ b/cpu/mpc85xx/start.S
@@ -1,5 +1,5 @@
/*
- * Copyright 2004, 2007 Freescale Semiconductor.
+ * Copyright 2004, 2007-2009 Freescale Semiconductor.
* Copyright (C) 2003 Motorola,Inc.
*
* See file CREDITS for list of people who contributed to this
@@ -821,6 +821,28 @@
/*------------------------------------------------------------------------------*/
/*
+ * void write_tlb(mas0, mas1, mas2, mas3, mas7)
+ */
+ .globl write_tlb
+write_tlb:
+ mtspr MAS0,r3
+ mtspr MAS1,r4
+ mtspr MAS2,r5
+ mtspr MAS3,r6
+#ifdef CONFIG_ENABLE_36BIT_PHYS
+ mtspr MAS7,r7
+#endif
+ li r3,0
+#ifdef CONFIG_SYS_BOOK3E_HV
+ mtspr MAS8,r3
+#endif
+ isync
+ tlbwe
+ msync
+ isync
+ blr
+
+/*
* void relocate_code (addr_sp, gd, addr_moni)
*
* This "function" does not return, instead it continues in RAM
