1181624Skmacy/****************************************************************************** 2181624Skmacy * xen-x86_32.h 3181624Skmacy * 4181624Skmacy * Guest OS interface to x86 32-bit Xen. 5181624Skmacy * 6181624Skmacy * Permission is hereby granted, free of charge, to any person obtaining a copy 7181624Skmacy * of this software and associated documentation files (the "Software"), to 8181624Skmacy * deal in the Software without restriction, including without limitation the 9181624Skmacy * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10181624Skmacy * sell copies of the Software, and to permit persons to whom the Software is 11181624Skmacy * furnished to do so, subject to the following conditions: 12181624Skmacy * 13181624Skmacy * The above copyright notice and this permission notice shall be included in 14181624Skmacy * all copies or substantial portions of the Software. 15181624Skmacy * 16181624Skmacy * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17181624Skmacy * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18181624Skmacy * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19181624Skmacy * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20181624Skmacy * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21181624Skmacy * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22181624Skmacy * DEALINGS IN THE SOFTWARE. 23181624Skmacy * 24181624Skmacy * Copyright (c) 2004-2007, K A Fraser 25181624Skmacy */ 26181624Skmacy 27181624Skmacy#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 28181624Skmacy#define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ 29181624Skmacy 30181624Skmacy/* 31181624Skmacy * Hypercall interface: 32251767Sgibbs * Input: %ebx, %ecx, %edx, %esi, %edi, %ebp (arguments 1-6) 33181624Skmacy * Output: %eax 34181624Skmacy * Access is via hypercall page (set up by guest loader or via a Xen MSR): 35181624Skmacy * call hypercall_page + hypercall-number * 32 36181624Skmacy * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) 37181624Skmacy */ 38181624Skmacy 39181624Skmacy/* 40181624Skmacy * These flat segments are in the Xen-private section of every GDT. Since these 41181624Skmacy * are also present in the initial GDT, many OSes will be able to avoid 42181624Skmacy * installing their own GDT. 43181624Skmacy */ 44181624Skmacy#define FLAT_RING1_CS 0xe019 /* GDT index 259 */ 45181624Skmacy#define FLAT_RING1_DS 0xe021 /* GDT index 260 */ 46181624Skmacy#define FLAT_RING1_SS 0xe021 /* GDT index 260 */ 47181624Skmacy#define FLAT_RING3_CS 0xe02b /* GDT index 261 */ 48181624Skmacy#define FLAT_RING3_DS 0xe033 /* GDT index 262 */ 49181624Skmacy#define FLAT_RING3_SS 0xe033 /* GDT index 262 */ 50181624Skmacy 51181624Skmacy#define FLAT_KERNEL_CS FLAT_RING1_CS 52181624Skmacy#define FLAT_KERNEL_DS FLAT_RING1_DS 53181624Skmacy#define FLAT_KERNEL_SS FLAT_RING1_SS 54181624Skmacy#define FLAT_USER_CS FLAT_RING3_CS 55181624Skmacy#define FLAT_USER_DS FLAT_RING3_DS 56181624Skmacy#define FLAT_USER_SS FLAT_RING3_SS 57181624Skmacy 58181624Skmacy#define __HYPERVISOR_VIRT_START_PAE 0xF5800000 59181624Skmacy#define __MACH2PHYS_VIRT_START_PAE 0xF5800000 60181624Skmacy#define __MACH2PHYS_VIRT_END_PAE 0xF6800000 61181624Skmacy#define HYPERVISOR_VIRT_START_PAE \ 62181624Skmacy mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE) 63181624Skmacy#define MACH2PHYS_VIRT_START_PAE \ 64181624Skmacy mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE) 65181624Skmacy#define MACH2PHYS_VIRT_END_PAE \ 66181624Skmacy mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE) 67181624Skmacy 68183340Skmacy/* Non-PAE bounds are obsolete. */ 69181624Skmacy#define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 70181624Skmacy#define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 71181624Skmacy#define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 72181624Skmacy#define HYPERVISOR_VIRT_START_NONPAE \ 73181624Skmacy mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE) 74181624Skmacy#define MACH2PHYS_VIRT_START_NONPAE \ 75181624Skmacy mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE) 76181624Skmacy#define MACH2PHYS_VIRT_END_NONPAE \ 77181624Skmacy mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE) 78181624Skmacy 79181624Skmacy#define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE 80181624Skmacy#define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE 81181624Skmacy#define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE 82181624Skmacy 83181624Skmacy#ifndef HYPERVISOR_VIRT_START 84181624Skmacy#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START) 85181624Skmacy#endif 86181624Skmacy 87181624Skmacy#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START) 88181624Skmacy#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END) 89181624Skmacy#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) 90181624Skmacy#ifndef machine_to_phys_mapping 91181624Skmacy#define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) 92181624Skmacy#endif 93181624Skmacy 94181624Skmacy/* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ 95181624Skmacy#if defined(__XEN__) || defined(__XEN_TOOLS__) 96183340Skmacy#undef ___DEFINE_XEN_GUEST_HANDLE 97183340Skmacy#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ 98181624Skmacy typedef struct { type *p; } \ 99181624Skmacy __guest_handle_ ## name; \ 100181624Skmacy typedef struct { union { type *p; uint64_aligned_t q; }; } \ 101181624Skmacy __guest_handle_64_ ## name 102251767Sgibbs#undef set_xen_guest_handle_raw 103251767Sgibbs#define set_xen_guest_handle_raw(hnd, val) \ 104181624Skmacy do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ 105181624Skmacy (hnd).p = val; \ 106181624Skmacy } while ( 0 ) 107181624Skmacy#define uint64_aligned_t uint64_t __attribute__((aligned(8))) 108183340Skmacy#define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name 109183340Skmacy#define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) 110181624Skmacy#endif 111181624Skmacy 112181624Skmacy#ifndef __ASSEMBLY__ 113181624Skmacy 114181624Skmacystruct cpu_user_regs { 115181624Skmacy uint32_t ebx; 116181624Skmacy uint32_t ecx; 117181624Skmacy uint32_t edx; 118181624Skmacy uint32_t esi; 119181624Skmacy uint32_t edi; 120181624Skmacy uint32_t ebp; 121181624Skmacy uint32_t eax; 122181624Skmacy uint16_t error_code; /* private */ 123181624Skmacy uint16_t entry_vector; /* private */ 124181624Skmacy uint32_t eip; 125181624Skmacy uint16_t cs; 126181624Skmacy uint8_t saved_upcall_mask; 127181624Skmacy uint8_t _pad0; 128181624Skmacy uint32_t eflags; /* eflags.IF == !saved_upcall_mask */ 129181624Skmacy uint32_t esp; 130181624Skmacy uint16_t ss, _pad1; 131181624Skmacy uint16_t es, _pad2; 132181624Skmacy uint16_t ds, _pad3; 133181624Skmacy uint16_t fs, _pad4; 134181624Skmacy uint16_t gs, _pad5; 135181624Skmacy}; 136181624Skmacytypedef struct cpu_user_regs cpu_user_regs_t; 137183340SkmacyDEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); 138181624Skmacy 139181624Skmacy/* 140181624Skmacy * Page-directory addresses above 4GB do not fit into architectural %cr3. 141181624Skmacy * When accessing %cr3, or equivalent field in vcpu_guest_context, guests 142181624Skmacy * must use the following accessor macros to pack/unpack valid MFNs. 143181624Skmacy */ 144181624Skmacy#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) 145181624Skmacy#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) 146181624Skmacy 147181624Skmacystruct arch_vcpu_info { 148181624Skmacy unsigned long cr2; 149181624Skmacy unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ 150181624Skmacy}; 151181624Skmacytypedef struct arch_vcpu_info arch_vcpu_info_t; 152181624Skmacy 153181624Skmacystruct xen_callback { 154181624Skmacy unsigned long cs; 155181624Skmacy unsigned long eip; 156181624Skmacy}; 157181624Skmacytypedef struct xen_callback xen_callback_t; 158181624Skmacy 159181624Skmacy#endif /* !__ASSEMBLY__ */ 160181624Skmacy 161181624Skmacy#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ 162181624Skmacy 163181624Skmacy/* 164181624Skmacy * Local variables: 165181624Skmacy * mode: C 166181624Skmacy * c-set-style: "BSD" 167181624Skmacy * c-basic-offset: 4 168181624Skmacy * tab-width: 4 169181624Skmacy * indent-tabs-mode: nil 170181624Skmacy * End: 171181624Skmacy */ 172