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authorMin Kyu Jeong <minkyu.jeong@arm.com>2010-08-23 11:18:41 -0500
committerMin Kyu Jeong <minkyu.jeong@arm.com>2010-08-23 11:18:41 -0500
commitd2fac84b95e778749606d5eeb15af906ba9e072e (patch)
tree83eaf938aaf6815bbfbcc1a52b957ab251177d52 /src
parenta02d82f9f8cd4fb826e294bbb333ca20cb5533de (diff)
downloadgem5-d2fac84b95e778749606d5eeb15af906ba9e072e.tar.xz
ARM: Clean up flattening for SPSR adding
Diffstat (limited to 'src')
-rw-r--r--src/arch/arm/isa.cc77
-rw-r--r--src/arch/arm/isa.hh40
2 files changed, 63 insertions, 54 deletions
diff --git a/src/arch/arm/isa.cc b/src/arch/arm/isa.cc
index fe4adb6fc..ac012fc3c 100644
--- a/src/arch/arm/isa.cc
+++ b/src/arch/arm/isa.cc
@@ -157,28 +157,17 @@ MiscReg
ISA::readMiscRegNoEffect(int misc_reg)
{
assert(misc_reg < NumMiscRegs);
- if (misc_reg == MISCREG_SPSR) {
- CPSR cpsr = miscRegs[MISCREG_CPSR];
- switch (cpsr.mode) {
- case MODE_USER:
- return miscRegs[MISCREG_SPSR];
- case MODE_FIQ:
- return miscRegs[MISCREG_SPSR_FIQ];
- case MODE_IRQ:
- return miscRegs[MISCREG_SPSR_IRQ];
- case MODE_SVC:
- return miscRegs[MISCREG_SPSR_SVC];
- case MODE_MON:
- return miscRegs[MISCREG_SPSR_MON];
- case MODE_ABORT:
- return miscRegs[MISCREG_SPSR_ABT];
- case MODE_UNDEFINED:
- return miscRegs[MISCREG_SPSR_UND];
- default:
- return miscRegs[MISCREG_SPSR];
- }
- }
- return miscRegs[misc_reg];
+
+ int flat_idx;
+ if (misc_reg == MISCREG_SPSR)
+ flat_idx = flattenMiscIndex(misc_reg);
+ else
+ flat_idx = misc_reg;
+ MiscReg val = miscRegs[flat_idx];
+
+ DPRINTF(MiscRegs, "Reading From misc reg %d (%d) : %#x\n",
+ misc_reg, flat_idx, val);
+ return val;
}
@@ -237,36 +226,16 @@ void
ISA::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
{
assert(misc_reg < NumMiscRegs);
- if (misc_reg == MISCREG_SPSR) {
- CPSR cpsr = miscRegs[MISCREG_CPSR];
- switch (cpsr.mode) {
- case MODE_USER:
- miscRegs[MISCREG_SPSR] = val;
- return;
- case MODE_FIQ:
- miscRegs[MISCREG_SPSR_FIQ] = val;
- return;
- case MODE_IRQ:
- miscRegs[MISCREG_SPSR_IRQ] = val;
- return;
- case MODE_SVC:
- miscRegs[MISCREG_SPSR_SVC] = val;
- return;
- case MODE_MON:
- miscRegs[MISCREG_SPSR_MON] = val;
- return;
- case MODE_ABORT:
- miscRegs[MISCREG_SPSR_ABT] = val;
- return;
- case MODE_UNDEFINED:
- miscRegs[MISCREG_SPSR_UND] = val;
- return;
- default:
- miscRegs[MISCREG_SPSR] = val;
- return;
- }
- }
- miscRegs[misc_reg] = val;
+
+ int flat_idx;
+ if (misc_reg == MISCREG_SPSR)
+ flat_idx = flattenMiscIndex(misc_reg);
+ else
+ flat_idx = misc_reg;
+ miscRegs[flat_idx] = val;
+
+ DPRINTF(MiscRegs, "Writing to misc reg %d (%d) : %#x\n", misc_reg,
+ flat_idx, val);
}
void
@@ -276,8 +245,8 @@ ISA::setMiscReg(int misc_reg, const MiscReg &val, ThreadContext *tc)
if (misc_reg == MISCREG_CPSR) {
updateRegMap(val);
CPSR cpsr = val;
- DPRINTF(Arm, "Updating CPSR to %#x f:%d i:%d a:%d mode:%#x\n",
- cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
+ DPRINTF(Arm, "Updating CPSR from %#x to %#x f:%d i:%d a:%d mode:%#x\n",
+ miscRegs[misc_reg], cpsr, cpsr.f, cpsr.i, cpsr.a, cpsr.mode);
Addr npc = tc->readNextPC() & ~PcModeMask;
if (cpsr.j)
npc = npc | (ULL(1) << PcJBitShift);
diff --git a/src/arch/arm/isa.hh b/src/arch/arm/isa.hh
index 0d83853b6..8318417f5 100644
--- a/src/arch/arm/isa.hh
+++ b/src/arch/arm/isa.hh
@@ -137,6 +137,46 @@ namespace ArmISA
return reg;
}
+ int
+ flattenMiscIndex(int reg)
+ {
+ if (reg == MISCREG_SPSR) {
+ int spsr_idx = NUM_MISCREGS;
+ CPSR cpsr = miscRegs[MISCREG_CPSR];
+ switch (cpsr.mode) {
+ case MODE_USER:
+ warn("User mode does not have SPSR\n");
+ spsr_idx = MISCREG_SPSR;
+ break;
+ case MODE_FIQ:
+ spsr_idx = MISCREG_SPSR_FIQ;
+ break;
+ case MODE_IRQ:
+ spsr_idx = MISCREG_SPSR_IRQ;
+ break;
+ case MODE_SVC:
+ spsr_idx = MISCREG_SPSR_SVC;
+ break;
+ case MODE_MON:
+ spsr_idx = MISCREG_SPSR_MON;
+ break;
+ case MODE_ABORT:
+ spsr_idx = MISCREG_SPSR_ABT;
+ break;
+ case MODE_UNDEFINED:
+ spsr_idx = MISCREG_SPSR_UND;
+ break;
+ default:
+ warn("Trying to access SPSR in an invalid mode: %d\n",
+ cpsr.mode);
+ spsr_idx = MISCREG_SPSR;
+ break;
+ }
+ return spsr_idx;
+ }
+ return reg;
+ }
+
void serialize(EventManager *em, std::ostream &os)
{}
void unserialize(EventManager *em, Checkpoint *cp,