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#ifndef _ASM_ARM_XEN_EVENTS_H
#define _ASM_ARM_XEN_EVENTS_H
#include <asm/ptrace.h>
enum ipi_vector {
XEN_PLACEHOLDER_VECTOR,
/* Xen IPIs go here */
XEN_NR_IPIS,
};
static inline int xen_irqs_disabled(struct pt_regs *regs)
{
return raw_irqs_disabled_flags(regs->ARM_cpsr);
}
/*
* We cannot use xchg because it does not support 8-byte
* values. However it is safe to use {ldr,dtd}exd directly because all
* platforms which Xen can run on support those instructions.
*/
static inline xen_ulong_t xchg_xen_ulong(xen_ulong_t *ptr, xen_ulong_t val)
{
xen_ulong_t oldval;
unsigned int tmp;
wmb();
asm volatile("@ xchg_xen_ulong\n"
"1: ldrexd %0, %H0, [%3]\n"
" strexd %1, %2, %H2, [%3]\n"
" teq %1, #0\n"
" bne 1b"
: "=&r" (oldval), "=&r" (tmp)
: "r" (val), "r" (ptr)
: "memory", "cc");
return oldval;
}
#endif /* _ASM_ARM_XEN_EVENTS_H */
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