From: Sandipan Das <sandipan@linux.ibm.com>
Date: Sun, 14 Jun 2020 11:32:00 +0000 (+0530)
Subject: arch-power: Refactor argument registers
X-Git-Tag: develop-gem5-snapshot~13
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bc72457a0784ea18801d73bfe3ab36a649f55489;p=gem5.git

arch-power: Refactor argument registers

This reintroduces the argument register constants that
were removed in commit 7bb456f02 ("arch-power: Delete
unused register related constants"), adds a definition
for the sixth argument register and switches to these
constants to specify the arguments used by the system
call ABI.

Change-Id: I5804f4d2b27a04d0e7b69132e5abce5761b239f5
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
---

diff --git a/src/arch/power/registers.hh b/src/arch/power/registers.hh
index ad1b60814..c9bdf1c8b 100644
--- a/src/arch/power/registers.hh
+++ b/src/arch/power/registers.hh
@@ -78,6 +78,12 @@ const int NumMiscRegs = NUM_MISCREGS;
 
 // Semantically meaningful register indices
 const int ReturnValueReg = 3;
+const int ArgumentReg0 = 3;
+const int ArgumentReg1 = 4;
+const int ArgumentReg2 = 5;
+const int ArgumentReg3 = 6;
+const int ArgumentReg4 = 7;
+const int ArgumentReg5 = 8;
 const int StackPointerReg = 1;
 
 // There isn't one in Power, but we need to define one somewhere
diff --git a/src/arch/power/se_workload.cc b/src/arch/power/se_workload.cc
index 31ff24351..40179f1ef 100644
--- a/src/arch/power/se_workload.cc
+++ b/src/arch/power/se_workload.cc
@@ -31,7 +31,12 @@ namespace PowerISA
 {
 
 const std::vector<int> SEWorkload::SyscallABI::ArgumentRegs = {
-    3, 4, 5, 6, 7, 8
+    ArgumentReg0,
+    ArgumentReg1,
+    ArgumentReg2,
+    ArgumentReg3,
+    ArgumentReg4,
+    ArgumentReg5
 };
 
 } // namespace PowerISA