[AArch64] Add v8.1a "Privileged Access Never" extension

Reviewers: jmolloy

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8498

llvm-svn: 235104

2 files changed, 18 insertions, 3 deletions

diff --git a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
index 467e7f7a76d..31ffb51ab0b 100644
--- a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
+++ b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
@@ -142,7 +142,10 @@ AArch64PRFM::PRFMMapper::PRFMMapper()
 const AArch64NamedImmMapper::Mapping AArch64PState::PStateMapper::PStateMappings[] = {
   {"spsel", SPSel, 0},
   {"daifset", DAIFSet, 0},
-  {"daifclr", DAIFClr, 0}
+  {"daifclr", DAIFClr, 0},
+
+  // v8.1a "Privileged Access Never" extension-specific PStates
+  {"pan", PAN, AArch64::HasV8_1aOps},
 };
 
 AArch64PState::PStateMapper::PStateMapper()
@@ -267,7 +270,10 @@ const AArch64NamedImmMapper::Mapping AArch64SysReg::MSRMapper::MSRMappings[] = {
   {"icc_dir_el1", ICC_DIR_EL1, 0},
   {"icc_sgi1r_el1", ICC_SGI1R_EL1, 0},
   {"icc_asgi1r_el1", ICC_ASGI1R_EL1, 0},
-  {"icc_sgi0r_el1", ICC_SGI0R_EL1, 0}
+  {"icc_sgi0r_el1", ICC_SGI0R_EL1, 0},
+
+  // v8.1a "Privileged Access Never" extension-specific system registers
+  {"pan", PAN, AArch64::HasV8_1aOps},
 };
 
 AArch64SysReg::MSRMapper::MSRMapper() {
@@ -756,6 +762,9 @@ const AArch64NamedImmMapper::Mapping AArch64SysReg::SysRegMapper::SysRegMappings
 
   // Cyclone registers
   {"cpm_ioacc_ctl_el3", CPM_IOACC_CTL_EL3, AArch64::ProcCyclone},
+
+  // v8.1a "Privileged Access Never" extension-specific system registers
+  {"pan", PAN, AArch64::HasV8_1aOps},
 };
 
 uint32_t
diff --git a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
index 1594fa4f0cd..60a83a893e9 100644
--- a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
+++ b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
@@ -447,7 +447,10 @@ namespace AArch64PState {
     Invalid = -1,
     SPSel = 0x05,
     DAIFSet = 0x1e,
-    DAIFClr = 0x1f
+    DAIFClr = 0x1f,
+
+    // v8.1a "Privileged Access Never" extension-specific PStates
+    PAN = 0x04,
   };
 
   struct PStateMapper : AArch64NamedImmMapper {
@@ -1135,6 +1138,9 @@ namespace AArch64SysReg {
     ICH_LR14_EL2      = 0xe66e, // 11  100  1100  1101  110
     ICH_LR15_EL2      = 0xe66f, // 11  100  1100  1101  111
 
+    // v8.1a "Privileged Access Never" extension-specific system registers
+    PAN               = 0xc213, // 11  000  0100  0010  011
+
     // Cyclone specific system registers
     CPM_IOACC_CTL_EL3 = 0xff90,
   };