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#ifndef __ARM_VFP_H_
#define __ARM_VFP_H_
#include <xen/types.h>
#define FPEXC_EN (1u << 30)
/* Save and restore FP state.
* Ought to be using the new vmrs/vmsr names, but older binutils has a
* bug where it only allows them to target fpscr (and not, say, fpexc). */
#define READ_FP(reg) ({ \
uint32_t val; \
asm volatile ("fmrx %0, fp" #reg : "=r" (val)); \
val; })
#define WRITE_FP(reg, val) do { \
asm volatile ("fmxr fp" #reg ", %0" : : "r" (val)); \
} while (0)
/* Start-of-day: Turn on VFP */
static inline void enable_vfp(void)
{
WRITE_FP(exc, READ_FP(exc) | FPEXC_EN);
}
#endif
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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