ia64/xen-unstable

view xen/include/public/arch-x86/xen-x86_32.h @ 13792:56377f5ce588

[XEN] Fix dom/sysctl structure alignement.

Versions of gcc up to and including 3.3 appear to ignore
__attribute__((align(x))) when applied to typedefs or to members of
anonymous unions. Workaround this by explicitly aligning each
definition of a 64 bit guest handle.

Tidy up x86_64 compat entry.S a bit.

Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
author Ian Campbell <ian.campbell@xensource.com>
date Wed Jan 31 16:54:21 2007 +0000 (2007-01-31)
parents 30af6cfdb05c
children 0e0fdba35503
line source
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 */
27 #ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
28 #define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__
30 /*
31 * Hypercall interface:
32 * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5)
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 */
39 #if __XEN_INTERFACE_VERSION__ < 0x00030203
40 /*
41 * Legacy hypercall interface:
42 * As above, except the entry sequence to the hypervisor is:
43 * mov $hypercall-number*32,%eax ; int $0x82
44 */
45 #define TRAP_INSTR "int $0x82"
46 #endif
48 /*
49 * These flat segments are in the Xen-private section of every GDT. Since these
50 * are also present in the initial GDT, many OSes will be able to avoid
51 * installing their own GDT.
52 */
53 #define FLAT_RING1_CS 0xe019 /* GDT index 259 */
54 #define FLAT_RING1_DS 0xe021 /* GDT index 260 */
55 #define FLAT_RING1_SS 0xe021 /* GDT index 260 */
56 #define FLAT_RING3_CS 0xe02b /* GDT index 261 */
57 #define FLAT_RING3_DS 0xe033 /* GDT index 262 */
58 #define FLAT_RING3_SS 0xe033 /* GDT index 262 */
60 #define FLAT_KERNEL_CS FLAT_RING1_CS
61 #define FLAT_KERNEL_DS FLAT_RING1_DS
62 #define FLAT_KERNEL_SS FLAT_RING1_SS
63 #define FLAT_USER_CS FLAT_RING3_CS
64 #define FLAT_USER_DS FLAT_RING3_DS
65 #define FLAT_USER_SS FLAT_RING3_SS
67 /*
68 * Virtual addresses beyond this are not modifiable by guest OSes. The
69 * machine->physical mapping table starts at this address, read-only.
70 */
71 #ifdef CONFIG_X86_PAE
72 #define __HYPERVISOR_VIRT_START 0xF5800000
73 #define __MACH2PHYS_VIRT_START 0xF5800000
74 #define __MACH2PHYS_VIRT_END 0xF6800000
75 #else
76 #define __HYPERVISOR_VIRT_START 0xFC000000
77 #define __MACH2PHYS_VIRT_START 0xFC000000
78 #define __MACH2PHYS_VIRT_END 0xFC400000
79 #endif
81 #ifndef HYPERVISOR_VIRT_START
82 #define HYPERVISOR_VIRT_START mk_unsigned_long(__HYPERVISOR_VIRT_START)
83 #endif
85 #define MACH2PHYS_VIRT_START mk_unsigned_long(__MACH2PHYS_VIRT_START)
86 #define MACH2PHYS_VIRT_END mk_unsigned_long(__MACH2PHYS_VIRT_END)
87 #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2)
88 #ifndef machine_to_phys_mapping
89 #define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START)
90 #endif
92 /* 32-/64-bit invariability for control interfaces (domctl/sysctl). */
93 #if defined(__XEN__) || defined(__XEN_TOOLS__)
94 #undef __DEFINE_XEN_GUEST_HANDLE
95 #define __DEFINE_XEN_GUEST_HANDLE(name, type) \
96 typedef struct { type *p; } \
97 __guest_handle_ ## name; \
98 typedef struct { union { type *p; uint64_aligned_t q; }; } \
99 __guest_handle_64_ ## name
100 #undef set_xen_guest_handle
101 #define set_xen_guest_handle(hnd, val) \
102 do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \
103 (hnd).p = val; \
104 } while ( 0 )
105 #define uint64_aligned_t uint64_t __attribute__((aligned(8)))
106 #define XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name __attribute__((aligned(8)))
107 #endif
109 #ifndef __ASSEMBLY__
111 struct cpu_user_regs {
112 uint32_t ebx;
113 uint32_t ecx;
114 uint32_t edx;
115 uint32_t esi;
116 uint32_t edi;
117 uint32_t ebp;
118 uint32_t eax;
119 uint16_t error_code; /* private */
120 uint16_t entry_vector; /* private */
121 uint32_t eip;
122 uint16_t cs;
123 uint8_t saved_upcall_mask;
124 uint8_t _pad0;
125 uint32_t eflags; /* eflags.IF == !saved_upcall_mask */
126 uint32_t esp;
127 uint16_t ss, _pad1;
128 uint16_t es, _pad2;
129 uint16_t ds, _pad3;
130 uint16_t fs, _pad4;
131 uint16_t gs, _pad5;
132 };
133 typedef struct cpu_user_regs cpu_user_regs_t;
134 DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t);
136 /*
137 * Page-directory addresses above 4GB do not fit into architectural %cr3.
138 * When accessing %cr3, or equivalent field in vcpu_guest_context, guests
139 * must use the following accessor macros to pack/unpack valid MFNs.
140 */
141 #define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20))
142 #define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20))
144 struct arch_vcpu_info {
145 unsigned long cr2;
146 unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */
147 };
148 typedef struct arch_vcpu_info arch_vcpu_info_t;
150 struct xen_callback {
151 unsigned long cs;
152 unsigned long eip;
153 };
154 typedef struct xen_callback xen_callback_t;
156 #endif /* !__ASSEMBLY__ */
158 #endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */
160 /*
161 * Local variables:
162 * mode: C
163 * c-set-style: "BSD"
164 * c-basic-offset: 4
165 * tab-width: 4
166 * indent-tabs-mode: nil
167 * End:
168 */