diff options
Diffstat (limited to 'src/arch/arm/miscregs.hh')
| -rw-r--r-- | src/arch/arm/miscregs.hh | 41 |
1 files changed, 33 insertions, 8 deletions
diff --git a/src/arch/arm/miscregs.hh b/src/arch/arm/miscregs.hh index 742295c29..779ead7f4 100644 --- a/src/arch/arm/miscregs.hh +++ b/src/arch/arm/miscregs.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2010-2016 ARM Limited + * Copyright (c) 2010-2017 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -44,6 +44,7 @@ #define __ARCH_ARM_MISCREGS_HH__ #include <bitset> +#include <tuple> #include "base/bitunion.hh" #include "base/compiler.hh" @@ -1847,13 +1848,37 @@ namespace ArmISA EndBitUnion(CPTR) - // Checks read access permissions to coproc. registers - bool canReadCoprocReg(MiscRegIndex reg, SCR scr, CPSR cpsr, - ThreadContext *tc); - - // Checks write access permissions to coproc. registers - bool canWriteCoprocReg(MiscRegIndex reg, SCR scr, CPSR cpsr, - ThreadContext *tc); + /** + * Check for permission to read coprocessor registers. + * + * Checks whether an instruction at the current program mode has + * permissions to read the coprocessor registers. This function + * returns whether the check is undefined and if not whether the + * read access is permitted. + * + * @param the misc reg indicating the coprocessor + * @param the SCR + * @param the CPSR + * @return a tuple of booleans: can_read, undefined + */ + std::tuple<bool, bool> canReadCoprocReg(MiscRegIndex reg, SCR scr, + CPSR cpsr); + + /** + * Check for permission to write coprocessor registers. + * + * Checks whether an instruction at the current program mode has + * permissions to write the coprocessor registers. This function + * returns whether the check is undefined and if not whether the + * write access is permitted. + * + * @param the misc reg indicating the coprocessor + * @param the SCR + * @param the CPSR + * @return a tuple of booleans: can_write, undefined + */ + std::tuple<bool, bool> canWriteCoprocReg(MiscRegIndex reg, SCR scr, + CPSR cpsr); // Checks read access permissions to AArch64 system registers bool canReadAArch64SysReg(MiscRegIndex reg, SCR scr, CPSR cpsr, |