Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

[linux-2.6-block.git] / arch / arc / include / asm / entry.h

diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
index df57611652e50b73322a6eaf7005598684208d4a..884081099f800fd6b4ba133bc1f1746084845c49 100644 (file)
--- a/arch/arc/include/asm/entry.h
+++ b/arch/arc/include/asm/entry.h
@@ -365,7 +365,7 @@
  * it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
  *
  * Before saving the full regfile - this reg is restored back, only
- * to be saved again on kernel mode stack, as part of ptregs.
+ * to be saved again on kernel mode stack, as part of pt_regs.
  *-------------------------------------------------------------*/
 .macro EXCPN_PROLOG_FREEUP_REG reg
 #ifdef CONFIG_SMP
@@ -383,6 +383,28 @@
 #endif
 .endm
 
+/*--------------------------------------------------------------
+ * Exception Entry prologue
+ * -Switches stack to K mode (if not already)
+ * -Saves the register file
+ *
+ * After this it is safe to call the "C" handlers
+ *-------------------------------------------------------------*/
+.macro EXCEPTION_PROLOGUE
+
+       /* Need at least 1 reg to code the early exception prologue */
+       EXCPN_PROLOG_FREEUP_REG r9
+
+       /* U/K mode at time of exception (stack not switched if already K) */
+       lr  r9, [erstatus]
+
+       /* ARC700 doesn't provide auto-stack switching */
+       SWITCH_TO_KERNEL_STK
+
+       /* save the regfile */
+       SAVE_ALL_SYS
+.endm
+
 /*--------------------------------------------------------------
  * Save all registers used by Exceptions (TLB Miss, Prot-V, Mem err etc)
  * Requires SP to be already switched to kernel mode Stack