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target-arm: introduce tbflag for endianness

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Introduce a tbflags for endianness, set based upon the CPUs current
endianness. This in turn propagates through to the disas endianness
flag.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Crosthwaite 2016-03-04 11:30:20 +00:00 committed by Peter Maydell
parent aa6489da4e
commit 91cca2cda9
3 changed files with 9 additions and 2 deletions
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7
target-arm/cpu.h
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@ -1985,6 +1985,8 @@ static inline bool arm_cpu_data_is_big_endian(CPUARMState *env)
*/
#define ARM_TBFLAG_NS_SHIFT 19
#define ARM_TBFLAG_NS_MASK (1 << ARM_TBFLAG_NS_SHIFT)
#define ARM_TBFLAG_BE_DATA_SHIFT 20
#define ARM_TBFLAG_BE_DATA_MASK (1 << ARM_TBFLAG_BE_DATA_SHIFT)
/* Bit usage when in AArch64 state: currently we have no A64 specific bits */
@ -2015,6 +2017,8 @@ static inline bool arm_cpu_data_is_big_endian(CPUARMState *env)
(((F) & ARM_TBFLAG_XSCALE_CPAR_MASK) >> ARM_TBFLAG_XSCALE_CPAR_SHIFT)
#define ARM_TBFLAG_NS(F) \
(((F) & ARM_TBFLAG_NS_MASK) >> ARM_TBFLAG_NS_SHIFT)
#define ARM_TBFLAG_BE_DATA(F) \
(((F) & ARM_TBFLAG_BE_DATA_MASK) >> ARM_TBFLAG_BE_DATA_SHIFT)
static inline bool bswap_code(bool sctlr_b)
{
@ -2157,6 +2161,9 @@ static inline void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
}
}
}
if (arm_cpu_data_is_big_endian(env)) {
*flags |= ARM_TBFLAG_BE_DATA_MASK;
}
*flags |= fp_exception_el(env) << ARM_TBFLAG_FPEXC_EL_SHIFT;
*cs_base = 0;

2
target-arm/translate-a64.c
View File

@ -11043,7 +11043,7 @@ void gen_intermediate_code_a64(ARMCPU *cpu, TranslationBlock *tb)
!arm_el_is_aa64(env, 3);
dc->thumb = 0;
dc->sctlr_b = 0;
dc->be_data = MO_TE;
dc->be_data = ARM_TBFLAG_BE_DATA(tb->flags) ? MO_BE : MO_LE;
dc->condexec_mask = 0;
dc->condexec_cond = 0;
dc->mmu_idx = ARM_TBFLAG_MMUIDX(tb->flags);

2
target-arm/translate.c
View File

@ -11330,7 +11330,7 @@ void gen_intermediate_code(CPUARMState *env, TranslationBlock *tb)
!arm_el_is_aa64(env, 3);
dc->thumb = ARM_TBFLAG_THUMB(tb->flags);
dc->sctlr_b = ARM_TBFLAG_SCTLR_B(tb->flags);
dc->be_data = MO_TE;
dc->be_data = ARM_TBFLAG_BE_DATA(tb->flags) ? MO_BE : MO_LE;
dc->condexec_mask = (ARM_TBFLAG_CONDEXEC(tb->flags) & 0xf) << 1;
dc->condexec_cond = ARM_TBFLAG_CONDEXEC(tb->flags) >> 4;
dc->mmu_idx = ARM_TBFLAG_MMUIDX(tb->flags);