1/****************************************************************************** 2 * xen-x86_32.h 3 * 4 * Guest OS interface to x86 32-bit Xen. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 * 24 * Copyright (c) 2004-2007, K A Fraser 25 */ 26 27#include <sys/param.h> 28#include <sys/types.h> 29 30#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 31#define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 32 33/* 34 * Hypercall interface: 35 * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5) 36 * Output: %eax 37 * Access is via hypercall page (set up by guest loader or via a Xen MSR): 38 * call hypercall_page + hypercall-number * 32 39 * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) 40 */ 41 42#if __XEN_INTERFACE_VERSION__ < 0x00030203 43/* 44 * Legacy hypercall interface: 45 * As above, except the entry sequence to the hypervisor is: 46 * mov $hypercall-number*32,%eax ; int $0x82 47 */ 48#define TRAP_INSTR "int $0x82" 49#endif 50 51/* 52 * These flat segments are in the Xen-private section of every GDT. Since these 53 * are also present in the initial GDT, many OSes will be able to avoid 54 * installing their own GDT. 55 */ 56#define FLAT_RING1_CS 0xe019 /* GDT index 259 */ 57#define FLAT_RING1_DS 0xe021 /* GDT index 260 */ 58#define FLAT_RING1_SS 0xe021 /* GDT index 260 */ 59#define FLAT_RING3_CS 0xe02b /* GDT index 261 */ 60#define FLAT_RING3_DS 0xe033 /* GDT index 262 */ 61#define FLAT_RING3_SS 0xe033 /* GDT index 262 */ 62 63#define FLAT_KERNEL_CS FLAT_RING1_CS 64#define FLAT_KERNEL_DS FLAT_RING1_DS 65#define FLAT_KERNEL_SS FLAT_RING1_SS 66#define FLAT_USER_CS FLAT_RING3_CS 67#define FLAT_USER_DS FLAT_RING3_DS 68#define FLAT_USER_SS FLAT_RING3_SS 69 70#define __HYPERVISOR_VIRT_START_PAE 0xF5800000 71#define __MACH2PHYS_VIRT_START_PAE 0xF5800000 72#define __MACH2PHYS_VIRT_END_PAE 0xF6800000 73#define HYPERVISOR_VIRT_START_PAE \ 74 mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE) 75#define MACH2PHYS_VIRT_START_PAE \ 76 mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE) 77#define MACH2PHYS_VIRT_END_PAE \ 78 mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE) 79 80/* Non-PAE bounds are obsolete. */ 81#define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 82#define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 83#define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 84#define HYPERVISOR_VIRT_START_NONPAE \ 85 mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE) 86#define MACH2PHYS_VIRT_START_NONPAE \ 87 mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE) 88#define MACH2PHYS_VIRT_END_NONPAE \ 89 mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE) 90 91#define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE 92#define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE 93#define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE 94 95#ifndef HYPERVISOR_VIRT_START 96#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) 97#endif 98 99#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) 100#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) 101#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) 102#ifndef machine_to_phys_mapping 103#define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) 104#endif 105 106/* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ 107#if defined(__XEN__) || defined(__XEN_TOOLS__) 108#undef ___DEFINE_XEN_GUEST_HANDLE 109#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ 110 typedef struct { type *p; } \ 111 __guest_handle_ ## name; \ 112 typedef struct { union { type *p; uint64_aligned_t q; }; } \ 113 __guest_handle_64_ ## name 114#undef set_xen_guest_handle 115#define set_xen_guest_handle(hnd, val) \ 116 do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ 117 (hnd).p = val; \ 118 } while ( 0 ) 119#define uint64_aligned_t uint64_t __attribute__((aligned(8))) 120#define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name 121#define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) 122#endif 123 124#ifndef __ASSEMBLY__ 125 126struct cpu_user_regs { 127 uint32_t ebx; 128 uint32_t ecx; 129 uint32_t edx; 130 uint32_t esi; 131 uint32_t edi; 132 uint32_t ebp; 133 uint32_t eax; 134 uint16_t error_code; /* private */ 135 uint16_t entry_vector; /* private */ 136 uint32_t eip; 137 uint16_t cs; 138 uint8_t saved_upcall_mask; 139 uint8_t _pad0; 140 uint32_t eflags; /* eflags.IF == !saved_upcall_mask */ 141 uint32_t esp; 142 uint16_t ss, _pad1; 143 uint16_t es, _pad2; 144 uint16_t ds, _pad3; 145 uint16_t fs, _pad4; 146 uint16_t gs, _pad5; 147}; 148typedef struct cpu_user_regs cpu_user_regs_t; 149DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); 150 151/* 152 * Page-directory addresses above 4GB do not fit into architectural %cr3. 153 * When accessing %cr3, or equivalent field in vcpu_guest_context, guests 154 * must use the following accessor macros to pack/unpack valid MFNs. 155 */ 156#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) 157#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) 158 159struct arch_vcpu_info { 160 unsigned long cr2; 161 unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ 162}; 163typedef struct arch_vcpu_info arch_vcpu_info_t; 164 165struct xen_callback { 166 unsigned long cs; 167 unsigned long eip; 168}; 169typedef struct xen_callback xen_callback_t; 170 171#endif /* !__ASSEMBLY__ */ 172 173#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ 174 175/* 176 * Local variables: 177 * mode: C 178 * c-set-style: "BSD" 179 * c-basic-offset: 4 180 * tab-width: 4 181 * indent-tabs-mode: nil 182 * End: 183 */ 184