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 * Note that this means that the xen_pfn_t type may be capable of 34 * representing pfn's which the guest cannot represent in its own pfn 35 * type. However since pfn space is controlled by the guest this is 36 * fine since it simply wouldn't be able to create any sure pfns in 37 * the first place. 38 */ 39 typedef uint64_t xen_pfn_t; 40 #define PRI_xen_pfn "llx" 41 typedef uint64_t xen_ulong_t; 42 #define PRI_xen_ulong "llx" 43 /* Guest handles for primitive C types. */ 44 __DEFINE_GUEST_HANDLE(uchar, unsigned char); 45 __DEFINE_GUEST_HANDLE(uint, unsigned int); 46 DEFINE_GUEST_HANDLE(char); 47 DEFINE_GUEST_HANDLE(int); 48 DEFINE_GUEST_HANDLE(void); 49 DEFINE_GUEST_HANDLE(uint64_t); 50 DEFINE_GUEST_HANDLE(uint32_t); 51 DEFINE_GUEST_HANDLE(xen_pfn_t); 52 DEFINE_GUEST_HANDLE(xen_ulong_t); 53 54 /* Maximum number of virtual CPUs in multi-processor guests. */ 55 #define MAX_VIRT_CPUS 1 56 57 struct arch_vcpu_info { }; 58 struct arch_shared_info { }; 59 60 /* TODO: Move pvclock definitions some place arch independent */ 61 struct pvclock_vcpu_time_info { 62 u32 version; 63 u32 pad0; 64 u64 tsc_timestamp; 65 u64 system_time; 66 u32 tsc_to_system_mul; 67 s8 tsc_shift; 68 u8 flags; 69 u8 pad[2]; 70 } __attribute__((__packed__)); /* 32 bytes */ 71 72 /* It is OK to have a 12 bytes struct with no padding because it is packed */ 73 struct pvclock_wall_clock { 74 u32 version; 75 u32 sec; 76 u32 nsec; 77 } __attribute__((__packed__)); 78 #endif 79 80 #endif /* _ASM_ARM_XEN_INTERFACE_H */ 81