172 lines
6.1 KiB
C
172 lines
6.1 KiB
C
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/******************************************************************************
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* xen-x86_32.h
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*
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* Guest OS interface to x86 32-bit Xen.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Copyright (c) 2004-2007, K A Fraser
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*/
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#ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
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#define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
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/*
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* Hypercall interface:
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* Input: %ebx, %ecx, %edx, %esi, %edi, %ebp (arguments 1-6)
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* Output: %eax
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* Access is via hypercall page (set up by guest loader or via a Xen MSR):
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* call hypercall_page + hypercall-number * 32
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* Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx)
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*/
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/*
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* These flat segments are in the Xen-private section of every GDT. Since these
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* are also present in the initial GDT, many OSes will be able to avoid
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* installing their own GDT.
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*/
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#define FLAT_RING1_CS 0xe019 /* GDT index 259 */
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#define FLAT_RING1_DS 0xe021 /* GDT index 260 */
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#define FLAT_RING1_SS 0xe021 /* GDT index 260 */
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#define FLAT_RING3_CS 0xe02b /* GDT index 261 */
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#define FLAT_RING3_DS 0xe033 /* GDT index 262 */
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#define FLAT_RING3_SS 0xe033 /* GDT index 262 */
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#define FLAT_KERNEL_CS FLAT_RING1_CS
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#define FLAT_KERNEL_DS FLAT_RING1_DS
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#define FLAT_KERNEL_SS FLAT_RING1_SS
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#define FLAT_USER_CS FLAT_RING3_CS
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#define FLAT_USER_DS FLAT_RING3_DS
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#define FLAT_USER_SS FLAT_RING3_SS
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#define __HYPERVISOR_VIRT_START_PAE 0xF5800000
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#define __MACH2PHYS_VIRT_START_PAE 0xF5800000
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#define __MACH2PHYS_VIRT_END_PAE 0xF6800000
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#define HYPERVISOR_VIRT_START_PAE \
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mk_unsigned_long(__HYPERVISOR_VIRT_START_PAE)
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#define MACH2PHYS_VIRT_START_PAE \
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mk_unsigned_long(__MACH2PHYS_VIRT_START_PAE)
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#define MACH2PHYS_VIRT_END_PAE \
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mk_unsigned_long(__MACH2PHYS_VIRT_END_PAE)
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/* Non-PAE bounds are obsolete. */
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#define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000
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#define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000
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#define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000
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#define HYPERVISOR_VIRT_START_NONPAE \
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mk_unsigned_long(__HYPERVISOR_VIRT_START_NONPAE)
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#define MACH2PHYS_VIRT_START_NONPAE \
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mk_unsigned_long(__MACH2PHYS_VIRT_START_NONPAE)
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#define MACH2PHYS_VIRT_END_NONPAE \
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mk_unsigned_long(__MACH2PHYS_VIRT_END_NONPAE)
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#define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE
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#define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE
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#define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE
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#ifndef HYPERVISOR_VIRT_START
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#define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
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#endif
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#define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
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#define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
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#define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2)
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#ifndef machine_to_phys_mapping
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#define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START)
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#endif
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/* 32-/64-bit invariability for control interfaces (domctl/sysctl). */
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#if defined(__XEN__) || defined(__XEN_TOOLS__)
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#undef ___DEFINE_XEN_GUEST_HANDLE
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#define ___DEFINE_XEN_GUEST_HANDLE(name, type) \
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typedef struct { type *p; } \
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__guest_handle_ ## name; \
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typedef struct { union { type *p; uint64_aligned_t q; }; } \
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__guest_handle_64_ ## name
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#undef set_xen_guest_handle_raw
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#define set_xen_guest_handle_raw(hnd, val) \
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do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \
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(hnd).p = val; \
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} while ( 0 )
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#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
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#define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name
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#define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name)
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#endif
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#ifndef __ASSEMBLY__
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struct cpu_user_regs {
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esi;
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uint32_t edi;
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uint32_t ebp;
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uint32_t eax;
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uint16_t error_code; /* private */
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uint16_t entry_vector; /* private */
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uint32_t eip;
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uint16_t cs;
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uint8_t saved_upcall_mask;
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uint8_t _pad0;
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uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
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uint32_t esp;
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uint16_t ss, _pad1;
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uint16_t es, _pad2;
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uint16_t ds, _pad3;
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uint16_t fs, _pad4;
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uint16_t gs, _pad5;
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};
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typedef struct cpu_user_regs cpu_user_regs_t;
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DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t);
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/*
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* Page-directory addresses above 4GB do not fit into architectural %cr3.
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* When accessing %cr3, or equivalent field in vcpu_guest_context, guests
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* must use the following accessor macros to pack/unpack valid MFNs.
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*/
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#define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
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#define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
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struct arch_vcpu_info {
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unsigned long cr2;
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unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */
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};
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typedef struct arch_vcpu_info arch_vcpu_info_t;
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struct xen_callback {
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unsigned long cs;
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unsigned long eip;
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};
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typedef struct xen_callback xen_callback_t;
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#endif /* !__ASSEMBLY__ */
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#endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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