Add a prefetch abort handler

This patch adds a prefetch abort handler similar to the data abort one
and renames the latter for consistency. Initial implementation by Paul
Brook with some renaming by Catalin Marinas.

Signed-off-by: Paul Brook <paul@codesourcery.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 57 insertions, 30 deletions

diff --git a/include/asm-arm/glue.h b/include/asm-arm/glue.h
index 22274ce8137..a97a182ba28 100644
--- a/include/asm-arm/glue.h
+++ b/include/asm-arm/glue.h
@@ -40,83 +40,110 @@
  *        v6_early      - ARMv6 generic early abort handler
  *        v7_early      - ARMv7 generic early abort handler
  */
-#undef CPU_ABORT_HANDLER
-#undef MULTI_ABORT
+#undef CPU_DABORT_HANDLER
+#undef MULTI_DABORT
 
 #if defined(CONFIG_CPU_ARM610)
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER cpu_arm6_data_abort
+#  define CPU_DABORT_HANDLER cpu_arm6_data_abort
 # endif
 #endif
 
 #if defined(CONFIG_CPU_ARM710)
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER cpu_arm7_data_abort
+#  define CPU_DABORT_HANDLER cpu_arm7_data_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_LV4T
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v4t_late_abort
+#  define CPU_DABORT_HANDLER v4t_late_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV4
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v4_early_abort
+#  define CPU_DABORT_HANDLER v4_early_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV4T
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v4t_early_abort
+#  define CPU_DABORT_HANDLER v4t_early_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV5TJ
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v5tj_early_abort
+#  define CPU_DABORT_HANDLER v5tj_early_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV5T
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v5t_early_abort
+#  define CPU_DABORT_HANDLER v5t_early_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV6
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v6_early_abort
+#  define CPU_DABORT_HANDLER v6_early_abort
 # endif
 #endif
 
 #ifdef CONFIG_CPU_ABRT_EV7
-# ifdef CPU_ABORT_HANDLER
-#  define MULTI_ABORT 1
+# ifdef CPU_DABORT_HANDLER
+#  define MULTI_DABORT 1
 # else
-#  define CPU_ABORT_HANDLER v7_early_abort
+#  define CPU_DABORT_HANDLER v7_early_abort
 # endif
 #endif
 
-#ifndef CPU_ABORT_HANDLER
+#ifndef CPU_DABORT_HANDLER
 #error Unknown data abort handler type
 #endif
 
+/*
+ * Prefetch abort handler.  If the CPU has an IFAR use that, otherwise
+ * use the address of the aborted instruction
+ */
+#undef CPU_PABORT_HANDLER
+#undef MULTI_PABORT
+
+#ifdef CONFIG_CPU_PABRT_IFAR
+# ifdef CPU_PABORT_HANDLER
+#  define MULTI_PABORT 1
+# else
+#  define CPU_PABORT_HANDLER(reg, insn) mrc p15, 0, reg, cr6, cr0, 2
+# endif
+#endif
+
+#ifdef CONFIG_CPU_PABRT_NOIFAR
+# ifdef CPU_PABORT_HANDLER
+#  define MULTI_PABORT 1
+# else
+#  define CPU_PABORT_HANDLER(reg, insn) mov reg, insn
+# endif
+#endif
+
+#ifndef CPU_PABORT_HANDLER
+#error Unknown prefetch abort handler type
+#endif
+
 #endif