diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86/include/bits/xen.h')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/x86/include/bits/xen.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/include/bits/xen.h b/qemu/roms/ipxe/src/arch/x86/include/bits/xen.h new file mode 100644 index 000000000..dbccf1b77 --- /dev/null +++ b/qemu/roms/ipxe/src/arch/x86/include/bits/xen.h @@ -0,0 +1,164 @@ +#ifndef _BITS_XEN_H +#define _BITS_XEN_H + +/** @file + * + * Xen interface + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +/* Hypercall registers */ +#ifdef __x86_64__ +#define XEN_REG1 "rdi" +#define XEN_REG2 "rsi" +#define XEN_REG3 "rdx" +#define XEN_REG4 "r10" +#define XEN_REG5 "r8" +#else +#define XEN_REG1 "ebx" +#define XEN_REG2 "ecx" +#define XEN_REG3 "edx" +#define XEN_REG4 "esi" +#define XEN_REG5 "edi" +#endif + +/** A hypercall entry point */ +struct xen_hypercall { + /** Code generated by hypervisor */ + uint8_t code[32]; +} __attribute__ (( packed )); + +/** + * 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, unsigned int hypercall, + unsigned long arg1 ) { + register unsigned long reg1 asm ( XEN_REG1 ) = arg1; + unsigned long retval; + + __asm__ __volatile__ ( "call *%2" + : "=a" ( retval ), "+r" ( reg1 ) + : "r" ( &xen->hypercall[hypercall] ) + : XEN_REG2, XEN_REG3, XEN_REG4, XEN_REG5, + "memory" ); + return retval; +} + +/** + * 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, unsigned int hypercall, + unsigned long arg1, unsigned long arg2 ) { + register unsigned long reg1 asm ( XEN_REG1 ) = arg1; + register unsigned long reg2 asm ( XEN_REG2 ) = arg2; + unsigned long retval; + + __asm__ __volatile__ ( "call *%3" + : "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ) + : "r" ( &xen->hypercall[hypercall] ) + : XEN_REG3, XEN_REG4, XEN_REG5, "memory" ); + return retval; +} + +/** + * 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, unsigned int hypercall, + unsigned long arg1, unsigned long arg2, unsigned long arg3 ) { + register unsigned long reg1 asm ( XEN_REG1 ) = arg1; + register unsigned long reg2 asm ( XEN_REG2 ) = arg2; + register unsigned long reg3 asm ( XEN_REG3 ) = arg3; + unsigned long retval; + + __asm__ __volatile__ ( "call *%4" + : "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ), + "+r" ( reg3 ) + : "r" ( &xen->hypercall[hypercall] ) + : XEN_REG4, XEN_REG5, "memory" ); + return retval; +} + +/** + * 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, unsigned int hypercall, + unsigned long arg1, unsigned long arg2, unsigned long arg3, + unsigned long arg4 ) { + 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; + unsigned long retval; + + __asm__ __volatile__ ( "call *%5" + : "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ), + "+r" ( reg3 ), "+r" ( reg4 ) + : "r" ( &xen->hypercall[hypercall] ) + : XEN_REG5, "memory" ); + return retval; +} + +/** + * 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, unsigned int hypercall, + unsigned long arg1, unsigned long arg2, unsigned long arg3, + unsigned long arg4, unsigned long arg5 ) { + 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; + unsigned long retval; + + __asm__ __volatile__ ( "call *%6" + : "=a" ( retval ), "+r" ( reg1 ), "+r" ( reg2 ), + "+r" ( reg3 ), "+r" ( reg4 ), "+r" ( reg5 ) + : "r" ( &xen->hypercall[hypercall] ) + : "memory" ); + return retval; +} + +#endif /* _BITS_XEN_H */ |