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target/microblaze: Assert no overlap in flags making up tb_flags 

Create MSR_TB_MASK.  Use it in cpu_get_tb_cpu_state, and check
that IFLAGS_TB_MASK does not overlap.

Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-08-20 08:01:52 -07:00
parent d8e59c4a6f
commit 31f163d3da
1 changed files with 7 additions and 2 deletions
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9
target/microblaze/cpu.h
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@ -261,8 +261,11 @@ struct CPUMBState {
#define DRTE_FLAG (1 << 17)
#define DRTB_FLAG (1 << 18)
#define D_FLAG (1 << 19) /* Bit in ESR. */
/* TB dependent CPUMBState. */
#define IFLAGS_TB_MASK (D_FLAG | IMM_FLAG | DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)
#define MSR_TB_MASK (MSR_UM | MSR_VM | MSR_EE)
uint32_t iflags;
#if !defined(CONFIG_USER_ONLY)
@ -372,12 +375,14 @@ typedef MicroBlazeCPU ArchCPU;
#include "exec/cpu-all.h"
/* Ensure there is no overlap between the two masks. */
QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK);
static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*flags = (env->iflags & IFLAGS_TB_MASK) |
(env->msr & (MSR_UM | MSR_VM | MSR_EE));
*flags = (env->iflags & IFLAGS_TB_MASK) | (env->msr & MSR_TB_MASK);
*cs_base = (*flags & IMM_FLAG ? env->imm : 0);
}