| /****************************************************************************** |
| * xen-x86_32.h |
| * |
| * Guest OS interface to x86 32-bit Xen. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| * Copyright (c) 2004-2007, K A Fraser |
| */ |
| |
| #ifndef __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ |
| #define __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ |
| |
| /* |
| * Hypercall interface: |
| * Input: %ebx, %ecx, %edx, %esi, %edi, %ebp (arguments 1-6) |
| * Output: %eax |
| * Access is via hypercall page (set up by guest loader or via a Xen MSR): |
| * call hypercall_page + hypercall-number * 32 |
| * Clobbered: Argument registers (e.g., 2-arg hypercall clobbers %ebx,%ecx) |
| */ |
| |
| /* |
| * These flat segments are in the Xen-private section of every GDT. Since these |
| * are also present in the initial GDT, many OSes will be able to avoid |
| * installing their own GDT. |
| */ |
| #define FLAT_RING1_CS 0xe019 /* GDT index 259 */ |
| #define FLAT_RING1_DS 0xe021 /* GDT index 260 */ |
| #define FLAT_RING1_SS 0xe021 /* GDT index 260 */ |
| #define FLAT_RING3_CS 0xe02b /* GDT index 261 */ |
| #define FLAT_RING3_DS 0xe033 /* GDT index 262 */ |
| #define FLAT_RING3_SS 0xe033 /* GDT index 262 */ |
| |
| #define FLAT_KERNEL_CS FLAT_RING1_CS |
| #define FLAT_KERNEL_DS FLAT_RING1_DS |
| #define FLAT_KERNEL_SS FLAT_RING1_SS |
| #define FLAT_USER_CS FLAT_RING3_CS |
| #define FLAT_USER_DS FLAT_RING3_DS |
| #define FLAT_USER_SS FLAT_RING3_SS |
| |
| #define __HYPERVISOR_VIRT_START_PAE 0xF5800000 |
| #define __MACH2PHYS_VIRT_START_PAE 0xF5800000 |
| #define __MACH2PHYS_VIRT_END_PAE 0xF6800000 |
| #define HYPERVISOR_VIRT_START_PAE xen_mk_ulong(__HYPERVISOR_VIRT_START_PAE) |
| #define MACH2PHYS_VIRT_START_PAE xen_mk_ulong(__MACH2PHYS_VIRT_START_PAE) |
| #define MACH2PHYS_VIRT_END_PAE xen_mk_ulong(__MACH2PHYS_VIRT_END_PAE) |
| |
| /* Non-PAE bounds are obsolete. */ |
| #define __HYPERVISOR_VIRT_START_NONPAE 0xFC000000 |
| #define __MACH2PHYS_VIRT_START_NONPAE 0xFC000000 |
| #define __MACH2PHYS_VIRT_END_NONPAE 0xFC400000 |
| #define HYPERVISOR_VIRT_START_NONPAE \ |
| xen_mk_ulong(__HYPERVISOR_VIRT_START_NONPAE) |
| #define MACH2PHYS_VIRT_START_NONPAE \ |
| xen_mk_ulong(__MACH2PHYS_VIRT_START_NONPAE) |
| #define MACH2PHYS_VIRT_END_NONPAE \ |
| xen_mk_ulong(__MACH2PHYS_VIRT_END_NONPAE) |
| |
| #define __HYPERVISOR_VIRT_START __HYPERVISOR_VIRT_START_PAE |
| #define __MACH2PHYS_VIRT_START __MACH2PHYS_VIRT_START_PAE |
| #define __MACH2PHYS_VIRT_END __MACH2PHYS_VIRT_END_PAE |
| |
| #ifndef HYPERVISOR_VIRT_START |
| #define HYPERVISOR_VIRT_START xen_mk_ulong(__HYPERVISOR_VIRT_START) |
| #endif |
| |
| #define MACH2PHYS_VIRT_START xen_mk_ulong(__MACH2PHYS_VIRT_START) |
| #define MACH2PHYS_VIRT_END xen_mk_ulong(__MACH2PHYS_VIRT_END) |
| #define MACH2PHYS_NR_ENTRIES ((MACH2PHYS_VIRT_END-MACH2PHYS_VIRT_START)>>2) |
| #ifndef machine_to_phys_mapping |
| #define machine_to_phys_mapping ((unsigned long *)MACH2PHYS_VIRT_START) |
| #endif |
| |
| /* 32-/64-bit invariability for control interfaces (domctl/sysctl). */ |
| #if defined(__XEN__) || defined(__XEN_TOOLS__) |
| #undef ___DEFINE_XEN_GUEST_HANDLE |
| #define ___DEFINE_XEN_GUEST_HANDLE(name, type) \ |
| typedef struct { type *p; } \ |
| __guest_handle_ ## name; \ |
| typedef struct { union { type *p; uint64_aligned_t q; }; } \ |
| __guest_handle_64_ ## name |
| #undef set_xen_guest_handle_raw |
| #define set_xen_guest_handle_raw(hnd, val) \ |
| do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0; \ |
| (hnd).p = val; \ |
| } while ( 0 ) |
| #define int64_aligned_t int64_t __attribute__((aligned(8))) |
| #define uint64_aligned_t uint64_t __attribute__((aligned(8))) |
| #define __XEN_GUEST_HANDLE_64(name) __guest_handle_64_ ## name |
| #define XEN_GUEST_HANDLE_64(name) __XEN_GUEST_HANDLE_64(name) |
| #endif |
| |
| #ifndef __ASSEMBLY__ |
| |
| #if defined(XEN_GENERATING_COMPAT_HEADERS) |
| /* nothing */ |
| #elif defined(__XEN__) || defined(__XEN_TOOLS__) |
| /* Anonymous unions include all permissible names (e.g., al/ah/ax/eax). */ |
| #define __DECL_REG_LO8(which) union { \ |
| uint32_t e ## which ## x; \ |
| uint16_t which ## x; \ |
| struct { \ |
| uint8_t which ## l; \ |
| uint8_t which ## h; \ |
| }; \ |
| } |
| #define __DECL_REG_LO16(name) union { \ |
| uint32_t e ## name, _e ## name; \ |
| uint16_t name; \ |
| } |
| #else |
| /* Other sources must always use the proper 32-bit name (e.g., eax). */ |
| #define __DECL_REG_LO8(which) uint32_t e ## which ## x |
| #define __DECL_REG_LO16(name) uint32_t e ## name |
| #endif |
| |
| struct cpu_user_regs { |
| __DECL_REG_LO8(b); |
| __DECL_REG_LO8(c); |
| __DECL_REG_LO8(d); |
| __DECL_REG_LO16(si); |
| __DECL_REG_LO16(di); |
| __DECL_REG_LO16(bp); |
| __DECL_REG_LO8(a); |
| uint16_t error_code; /* private */ |
| uint16_t entry_vector; /* private */ |
| __DECL_REG_LO16(ip); |
| uint16_t cs; |
| uint8_t saved_upcall_mask; |
| uint8_t _pad0; |
| __DECL_REG_LO16(flags); /* eflags.IF == !saved_upcall_mask */ |
| __DECL_REG_LO16(sp); |
| uint16_t ss, _pad1; |
| uint16_t es, _pad2; |
| uint16_t ds, _pad3; |
| uint16_t fs, _pad4; |
| uint16_t gs, _pad5; |
| }; |
| typedef struct cpu_user_regs cpu_user_regs_t; |
| DEFINE_XEN_GUEST_HANDLE(cpu_user_regs_t); |
| |
| #undef __DECL_REG_LO8 |
| #undef __DECL_REG_LO16 |
| |
| /* |
| * Page-directory addresses above 4GB do not fit into architectural %cr3. |
| * When accessing %cr3, or equivalent field in vcpu_guest_context, guests |
| * must use the following accessor macros to pack/unpack valid MFNs. |
| */ |
| #define xen_pfn_to_cr3(pfn) (((unsigned)(pfn) << 12) | ((unsigned)(pfn) >> 20)) |
| #define xen_cr3_to_pfn(cr3) (((unsigned)(cr3) >> 12) | ((unsigned)(cr3) << 20)) |
| |
| struct arch_vcpu_info { |
| unsigned long cr2; |
| unsigned long pad[5]; /* sizeof(vcpu_info_t) == 64 */ |
| }; |
| typedef struct arch_vcpu_info arch_vcpu_info_t; |
| |
| struct xen_callback { |
| unsigned long cs; |
| unsigned long eip; |
| }; |
| typedef struct xen_callback xen_callback_t; |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __XEN_PUBLIC_ARCH_X86_XEN_X86_32_H__ */ |
| |
| /* |
| * Local variables: |
| * mode: C |
| * c-file-style: "BSD" |
| * c-basic-offset: 4 |
| * tab-width: 4 |
| * indent-tabs-mode: nil |
| * End: |
| */ |