1 /****************************************************************************** 2 * Guest OS interface to ARM Xen. 3 * 4 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012 5 */ 6 7 #ifndef _ASM_ARM_XEN_INTERFACE_H 8 #define _ASM_ARM_XEN_INTERFACE_H 9 10 #include <linux/types.h> 11 12 #define uint64_aligned_t uint64_t __attribute__((aligned(8))) 13 14 #define __DEFINE_GUEST_HANDLE(name, type) \ 15 typedef struct { union { type *p; uint64_aligned_t q; }; } \ 16 __guest_handle_ ## name 17 18 #define DEFINE_GUEST_HANDLE_STRUCT(name) \ 19 __DEFINE_GUEST_HANDLE(name, struct name) 20 #define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name) 21 #define GUEST_HANDLE(name) __guest_handle_ ## name 22 23 #define set_xen_guest_handle(hnd, val) \ 24 do { \ 25 if (sizeof(hnd) == 8) \ 26 *(uint64_t *)&(hnd) = 0; \ 27 (hnd).p = val; \ 28 } while (0) 29 30 #ifndef __ASSEMBLY__ 31 /* Explicitly size integers that represent pfns in the interface with 32 * Xen so that we can have one ABI that works for 32 and 64 bit guests. */ 33 typedef uint64_t xen_pfn_t; 34 typedef uint64_t xen_ulong_t; 35 /* Guest handles for primitive C types. */ 36 __DEFINE_GUEST_HANDLE(uchar, unsigned char); 37 __DEFINE_GUEST_HANDLE(uint, unsigned int); 38 __DEFINE_GUEST_HANDLE(ulong, unsigned long); 39 DEFINE_GUEST_HANDLE(char); 40 DEFINE_GUEST_HANDLE(int); 41 DEFINE_GUEST_HANDLE(long); 42 DEFINE_GUEST_HANDLE(void); 43 DEFINE_GUEST_HANDLE(uint64_t); 44 DEFINE_GUEST_HANDLE(uint32_t); 45 DEFINE_GUEST_HANDLE(xen_pfn_t); 46 47 /* Maximum number of virtual CPUs in multi-processor guests. */ 48 #define MAX_VIRT_CPUS 1 49 50 struct arch_vcpu_info { }; 51 struct arch_shared_info { }; 52 53 /* TODO: Move pvclock definitions some place arch independent */ 54 struct pvclock_vcpu_time_info { 55 u32 version; 56 u32 pad0; 57 u64 tsc_timestamp; 58 u64 system_time; 59 u32 tsc_to_system_mul; 60 s8 tsc_shift; 61 u8 flags; 62 u8 pad[2]; 63 } __attribute__((__packed__)); /* 32 bytes */ 64 65 /* It is OK to have a 12 bytes struct with no padding because it is packed */ 66 struct pvclock_wall_clock { 67 u32 version; 68 u32 sec; 69 u32 nsec; 70 } __attribute__((__packed__)); 71 #endif 72 73 #endif /* _ASM_ARM_XEN_INTERFACE_H */ 74