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Lightly hide the 'var' inside the macros to read the arm special registers.

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I just happenned to have 3rd party code using 'var' as the output variable
which drew my attention to this. variables defined inside macros should be
prefixed to avoid getting shadowed varable wanrings from clang.
This commit is contained in:
Julian Elischer 2019-06-15 00:47:39 +00:00
parent 4efd690068
commit c749d68596
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349044
1 changed files with 5 additions and 5 deletions
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10
sys/arm64/include/armreg.h
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@ -36,12 +36,12 @@
#define INSN_SIZE 4
#define READ_SPECIALREG(reg) \
({ uint64_t val; \
__asm __volatile("mrs %0, " __STRING(reg) : "=&r" (val)); \
val; \
({ uint64_t _val; \
__asm __volatile("mrs %0, " __STRING(reg) : "=&r" (_val)); \
_val; \
})
#define WRITE_SPECIALREG(reg, val) \
__asm __volatile("msr " __STRING(reg) ", %0" : : "r"((uint64_t)val))
#define WRITE_SPECIALREG(reg, _val) \
__asm __volatile("msr " __STRING(reg) ", %0" : : "r"((uint64_t)_val))
/* CNTHCTL_EL2 - Counter-timer Hypervisor Control register */
#define CNTHCTL_EVNTI_MASK (0xf << 4) /* Bit to trigger event stream */