#ifndef _BITS_XEN_H
#define _BITS_XEN_H
/** @file
*
* Xen interface
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/* Hypercall registers */
#ifdef __aarch64__
#define XEN_HC "x16"
#define XEN_REG1 "x0"
#define XEN_REG2 "x1"
#define XEN_REG3 "x2"
#define XEN_REG4 "x3"
#define XEN_REG5 "x4"
#else
#define XEN_HC "r12"
#define XEN_REG1 "r0"
#define XEN_REG2 "r1"
#define XEN_REG3 "r2"
#define XEN_REG4 "r3"
#define XEN_REG5 "r4"
#endif
/**
* Issue hypercall with one argument
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_1 ( struct xen_hypervisor *xen __unused, unsigned int hypercall,
unsigned long arg1 ) {
register unsigned long hc asm ( XEN_HC ) = hypercall;
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
__asm__ __volatile__ ( "hvc %1"
: "+r" ( reg1 )
: "i" ( XEN_HYPERCALL_TAG ), "r" ( hc )
: "memory", "cc" );
return reg1;
}
/**
* Issue hypercall with two arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_2 ( struct xen_hypervisor *xen __unused, unsigned int hypercall,
unsigned long arg1, unsigned long arg2 ) {
register unsigned long hc asm ( XEN_HC ) = hypercall;
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
__asm__ __volatile__ ( "hvc %2"
: "+r" ( reg1 ), "+r" ( reg2 )
: "i" ( XEN_HYPERCALL_TAG ), "r" ( hc )
: "memory", "cc" );
return reg1;
}
/**
* Issue hypercall with three arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_3 ( struct xen_hypervisor *xen __unused, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3 ) {
register unsigned long hc asm ( XEN_HC ) = hypercall;
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
__asm__ __volatile__ ( "hvc %3"
: "+r" ( reg1 ), "+r" ( reg2 ), "+r" ( reg3 )
: "i" ( XEN_HYPERCALL_TAG ), "r" ( hc )
: "memory", "cc" );
return reg1;
}
/**
* Issue hypercall with four arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @v arg4 Fourth argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_4 ( struct xen_hypervisor *xen __unused, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3,
unsigned long arg4 ) {
register unsigned long hc asm ( XEN_HC ) = hypercall;
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
register unsigned long reg4 asm ( XEN_REG4 ) = arg4;
__asm__ __volatile__ ( "hvc %4"
: "+r" ( reg1 ), "+r" ( reg2 ), "+r" ( reg3 ),
"+r" ( reg4 )
: "i" ( XEN_HYPERCALL_TAG ), "r" ( hc )
: "memory", "cc" );
return reg1;
}
/**
* Issue hypercall with five arguments
*
* @v xen Xen hypervisor
* @v hypercall Hypercall number
* @v arg1 First argument
* @v arg2 Second argument
* @v arg3 Third argument
* @v arg4 Fourth argument
* @v arg5 Fifth argument
* @ret retval Return value
*/
static inline __attribute__ (( always_inline )) unsigned long
xen_hypercall_5 ( struct xen_hypervisor *xen __unused, unsigned int hypercall,
unsigned long arg1, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5 ) {
register unsigned long hc asm ( XEN_HC ) = hypercall;
register unsigned long reg1 asm ( XEN_REG1 ) = arg1;
register unsigned long reg2 asm ( XEN_REG2 ) = arg2;
register unsigned long reg3 asm ( XEN_REG3 ) = arg3;
register unsigned long reg4 asm ( XEN_REG4 ) = arg4;
register unsigned long reg5 asm ( XEN_REG5 ) = arg5;
__asm__ __volatile__ ( "hvc %5"
: "+r" ( reg1 ), "+r" ( reg2 ), "+r" ( reg3 ),
"+r" ( reg4 ), "+r" ( reg5 )
: "i" ( XEN_HYPERCALL_TAG ), "r" ( hc )
: "memory", "cc" );
return reg1;
}
#endif /* _BITS_XEN_H */
