arm: Add support for ARMv8 (AArch64 & AArch32)

Note: AArch64 and AArch32 interworking is not supported. If you use an AArch64
kernel you are restricted to AArch64 user-mode binaries. This will be addressed
in a later patch.

Note: Virtualization is only supported in AArch32 mode. This will also be fixed
in a later patch.

Contributors:
Giacomo Gabrielli    (TrustZone, LPAE, system-level AArch64, AArch64 NEON, validation)
Thomas Grocutt       (AArch32 Virtualization, AArch64 FP, validation)
Mbou Eyole           (AArch64 NEON, validation)
Ali Saidi            (AArch64 Linux support, code integration, validation)
Edmund Grimley-Evans (AArch64 FP)
William Wang         (AArch64 Linux support)
Rene De Jong         (AArch64 Linux support, performance opt.)
Matt Horsnell        (AArch64 MP, validation)
Matt Evans           (device models, code integration, validation)
Chris Adeniyi-Jones  (AArch64 syscall-emulation)
Prakash Ramrakhyani  (validation)
Dam Sunwoo           (validation)
Chander Sudanthi     (validation)
Stephan Diestelhorst (validation)
Andreas Hansson      (code integration, performance opt.)
Eric Van Hensbergen  (performance opt.)
Gabe Black

1 files changed, 0 insertions, 12 deletions

diff --git a/src/arch/arm/isa/insts/div.isa b/src/arch/arm/isa/insts/div.isa
index 1ff6ef9e4..0896ea94f 100644
--- a/src/arch/arm/isa/insts/div.isa
+++ b/src/arch/arm/isa/insts/div.isa
@@ -40,12 +40,6 @@
 let {{
     sdivCode = '''
     if (Op2_sw == 0) {
-        if (((SCTLR)Sctlr).dz) {
-            if (FullSystem)
-                return new UndefinedInstruction;
-            else
-                return new UndefinedInstruction(false, mnemonic);
-        }
         Dest_sw = 0;
     } else if (Op1_sw == INT_MIN && Op2_sw == -1) {
         Dest_sw = INT_MIN;
@@ -63,12 +57,6 @@ let {{
 
     udivCode = '''
     if (Op2_uw == 0) {
-        if (((SCTLR)Sctlr).dz) {
-            if (FullSystem)
-                return new UndefinedInstruction;
-            else
-                return new UndefinedInstruction(false, mnemonic);
-        }
         Dest_uw = 0;
     } else {
         Dest_uw = Op1_uw / Op2_uw;