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 #ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 28 #define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 29 30 /* 31 * Hypercall interface: 32 * Input: %ebx, %ecx, %edx, %esi, %edi, %ebp (arguments 1-6) 33 * Output: %eax 34 * Access is via hypercall page (set up by guest loader or via a Xen MSR): 35 * call hypercall_page + hypercall-number * 32 36 * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) 37 */ 38 39 /* 40 * These flat segments are in the Xen-private section of every GDT. Since these 41 * are also present in the initial GDT, many OSes will be able to avoid 42 * installing their own GDT. 43 */ 44 #define FLAT_RING1_CS 0xe019 /* GDT index 259 */ 45 #define FLAT_RING1_DS 0xe021 /* GDT index 260 */ 46 #define FLAT_RING1_SS 0xe021 /* GDT index 260 */ 47 #define FLAT_RING3_CS 0xe02b /* GDT index 261 */ 48 #define FLAT_RING3_DS 0xe033 /* GDT index 262 */ 49 #define FLAT_RING3_SS 0xe033 /* GDT index 262 */ 50 51 #define FLAT_KERNEL_CS FLAT_RING1_CS 52 #define FLAT_KERNEL_DS FLAT_RING1_DS 53 #define FLAT_KERNEL_SS FLAT_RING1_SS 54 #define FLAT_USER_CS FLAT_RING3_CS 55 #define FLAT_USER_DS FLAT_RING3_DS 56 #define FLAT_USER_SS FLAT_RING3_SS 57 58 #define __HYPERVISOR_VIRT_START_PAE 0xF5800000 59 #define __MACH2PHYS_VIRT_START_PAE 0xF5800000 60 #define __MACH2PHYS_VIRT_END_PAE 0xF6800000 61 #define HYPERVISOR_VIRT_START_PAE \ 62 mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE) 63 #define MACH2PHYS_VIRT_START_PAE \ 64 mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE) 65 #define MACH2PHYS_VIRT_END_PAE \ 66 mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE) 67 68 /* Non-PAE bounds are obsolete. */ 69 #define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 70 #define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 71 #define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 72 #define HYPERVISOR_VIRT_START_NONPAE \ 73 mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE) 74 #define MACH2PHYS_VIRT_START_NONPAE \ 75 mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE) 76 #define MACH2PHYS_VIRT_END_NONPAE \ 77 mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE) 78 79 #define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE 80 #define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE 81 #define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE 82 83 #ifndef HYPERVISOR_VIRT_START 84 #define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) 85 #endif 86 87 #define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) 88 #define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) 89 #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) 90 #ifndef machine_to_phys_mapping 91 #define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) 92 #endif 93 94 /* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ 95 #if defined(__XEN__) || defined(__XEN_TOOLS__) 96 #undef ___DEFINE_XEN_GUEST_HANDLE 97 #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ 98 typedef struct { type *p; } \ 99 __guest_handle_ ## name; \ 100 typedef struct { union { type *p; uint64_aligned_t q; }; } \ 101 __guest_handle_64_ ## name 102 #undef set_xen_guest_handle_raw 103 #define set_xen_guest_handle_raw(hnd, val) \ 104 do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ 105 (hnd).p = val; \ 106 } while ( 0 ) 107 #define uint64_aligned_t uint64_t __attribute__((aligned(8))) 108 #define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name 109 #define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) 110 #endif 111 112 #ifndef __ASSEMBLY__ 113 114 struct cpu_user_regs { 115 uint32_t ebx; 116 uint32_t ecx; 117 uint32_t edx; 118 uint32_t esi; 119 uint32_t edi; 120 uint32_t ebp; 121 uint32_t eax; 122 uint16_t error_code; /* private */ 123 uint16_t entry_vector; /* private */ 124 uint32_t eip; 125 uint16_t cs; 126 uint8_t saved_upcall_mask; 127 uint8_t _pad0; 128 uint32_t eflags; /* eflags.IF == !saved_upcall_mask */ 129 uint32_t esp; 130 uint16_t ss, _pad1; 131 uint16_t es, _pad2; 132 uint16_t ds, _pad3; 133 uint16_t fs, _pad4; 134 uint16_t gs, _pad5; 135 }; 136 typedef struct cpu_user_regs cpu_user_regs_t; 137 DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); 138 139 /* 140 * Page-directory addresses above 4GB do not fit into architectural %cr3. 141 * When accessing %cr3, or equivalent field in vcpu_guest_context, guests 142 * must use the following accessor macros to pack/unpack valid MFNs. 143 */ 144 #define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) 145 #define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) 146 147 struct arch_vcpu_info { 148 unsigned long cr2; 149 unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ 150 }; 151 typedef struct arch_vcpu_info arch_vcpu_info_t; 152 153 struct xen_callback { 154 unsigned long cs; 155 unsigned long eip; 156 }; 157 typedef struct xen_callback xen_callback_t; 158 159 #endif /* !__ASSEMBLY__ */ 160 161 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ 162 163 /* 164 * Local variables: 165 * mode: C 166 * c-set-style: "BSD" 167 * c-basic-offset: 4 168 * tab-width: 4 169 * indent-tabs-mode: nil 170 * End: 171 */ 172