4 #include <linux/elfnote.h>
5 #include <linux/threads.h>
6 #include <linux/linkage.h>
7 #include <asm/segment.h>
9 #include <asm/thread_info.h>
10 #include <asm/asm-offsets.h>
11 #include <xen/interface/arch-x86_32.h>
12 #include <xen/interface/elfnote.h>
15 * References to members of the new_cpu_data structure.
18 #define X86 new_cpu_data+CPUINFO_x86
19 #define X86_VENDOR new_cpu_data+CPUINFO_x86_vendor
20 #define X86_MODEL new_cpu_data+CPUINFO_x86_model
21 #define X86_MASK new_cpu_data+CPUINFO_x86_mask
22 #define X86_HARD_MATH new_cpu_data+CPUINFO_hard_math
23 #define X86_CPUID new_cpu_data+CPUINFO_cpuid_level
24 #define X86_CAPABILITY new_cpu_data+CPUINFO_x86_capability
25 #define X86_VENDOR_ID new_cpu_data+CPUINFO_x86_vendor_id
27 #define VIRT_ENTRY_OFFSET 0x0
28 .org VIRT_ENTRY_OFFSET
30 movl %esi,xen_start_info
33 /* Set up the stack pointer */
34 movl $(init_thread_union+THREAD_SIZE),%esp
37 xorl %eax,%eax # call CPUID with 0 -> return vendor ID
39 movl %eax,X86_CPUID # save CPUID level
40 movl %ebx,X86_VENDOR_ID # lo 4 chars
41 movl %edx,X86_VENDOR_ID+4 # next 4 chars
42 movl %ecx,X86_VENDOR_ID+8 # last 4 chars
44 movl $1,%eax # Use the CPUID instruction to get CPU type
46 movb %al,%cl # save reg for future use
47 andb $0x0f,%ah # mask processor family
49 andb $0xf0,%al # mask model
52 andb $0x0f,%cl # mask mask revision
54 movl %edx,X86_CAPABILITY
58 xorl %eax,%eax # Clear FS/GS and LDT
61 cld # gcc2 wants the direction flag cleared at all times
65 jmp L6 # main should never return here, but
66 # just in case, we know what happens.
68 #define HYPERCALL_PAGE_OFFSET 0x1000
69 .org HYPERCALL_PAGE_OFFSET
74 * Real beginning of normal "text" segment
82 .section ".bss.page_aligned","w"
83 ENTRY(empty_zero_page)
87 * This starts the data section.
92 * The Global Descriptor Table contains 28 quadwords, per-CPU.
95 .quad 0x0000000000000000 /* NULL descriptor */
96 .quad 0x0000000000000000 /* 0x0b reserved */
97 .quad 0x0000000000000000 /* 0x13 reserved */
98 .quad 0x0000000000000000 /* 0x1b reserved */
99 .quad 0x0000000000000000 /* 0x20 unused */
100 .quad 0x0000000000000000 /* 0x28 unused */
101 .quad 0x0000000000000000 /* 0x33 TLS entry 1 */
102 .quad 0x0000000000000000 /* 0x3b TLS entry 2 */
103 .quad 0x0000000000000000 /* 0x43 TLS entry 3 */
104 .quad 0x0000000000000000 /* 0x4b reserved */
105 .quad 0x0000000000000000 /* 0x53 reserved */
106 .quad 0x0000000000000000 /* 0x5b reserved */
108 .quad 0x00cf9a000000ffff /* 0x60 kernel 4GB code at 0x00000000 */
109 .quad 0x00cf92000000ffff /* 0x68 kernel 4GB data at 0x00000000 */
110 .quad 0x00cffa000000ffff /* 0x73 user 4GB code at 0x00000000 */
111 .quad 0x00cff2000000ffff /* 0x7b user 4GB data at 0x00000000 */
113 .quad 0x0000000000000000 /* 0x80 TSS descriptor */
114 .quad 0x0000000000000000 /* 0x88 LDT descriptor */
117 * Segments used for calling PnP BIOS have byte granularity.
118 * They code segments and data segments have fixed 64k limits,
119 * the transfer segment sizes are set at run time.
121 .quad 0x0000000000000000 /* 0x90 32-bit code */
122 .quad 0x0000000000000000 /* 0x98 16-bit code */
123 .quad 0x0000000000000000 /* 0xa0 16-bit data */
124 .quad 0x0000000000000000 /* 0xa8 16-bit data */
125 .quad 0x0000000000000000 /* 0xb0 16-bit data */
128 * The APM segments have byte granularity and their bases
129 * are set at run time. All have 64k limits.
131 .quad 0x0000000000000000 /* 0xb8 APM CS code */
132 .quad 0x0000000000000000 /* 0xc0 APM CS 16 code (16 bit) */
133 .quad 0x0000000000000000 /* 0xc8 APM DS data */
135 .quad 0x0000000000000000 /* 0xd0 - ESPFIX 16-bit SS */
136 .quad 0x0000000000000000 /* 0xd8 - unused */
137 .quad 0x0000000000000000 /* 0xe0 - unused */
138 .quad 0x0000000000000000 /* 0xe8 - unused */
139 .quad 0x0000000000000000 /* 0xf0 - unused */
140 .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */
142 #ifdef CONFIG_XEN_COMPAT_030002
144 * __xen_guest information
147 .if (\value) < 0 || (\value) >= 0x10
148 utoa (((\value)>>4)&0x0fffffff)
150 .if ((\value) & 0xf) < 10
151 .byte '0' + ((\value) & 0xf)
153 .byte 'A' + ((\value) & 0xf) - 10
158 .ascii "GUEST_OS=linux,GUEST_VER=2.6"
159 .ascii ",XEN_VER=xen-3.0"
160 .ascii ",VIRT_BASE=0x"
162 .ascii ",ELF_PADDR_OFFSET=0x"
164 .ascii ",VIRT_ENTRY=0x"
165 utoa (__PAGE_OFFSET + __PHYSICAL_START + VIRT_ENTRY_OFFSET)
166 .ascii ",HYPERCALL_PAGE=0x"
167 utoa ((__PHYSICAL_START+HYPERCALL_PAGE_OFFSET)>>PAGE_SHIFT)
168 .ascii ",FEATURES=writable_page_tables"
169 .ascii "|writable_descriptor_tables"
170 .ascii "|auto_translated_physmap"
171 .ascii "|pae_pgdir_above_4gb"
172 .ascii "|supervisor_mode_kernel"
173 #ifdef CONFIG_X86_PAE
174 .ascii ",PAE=yes[extended-cr3]"
178 .ascii ",LOADER=generic"
180 #endif /* CONFIG_XEN_COMPAT_030002 */
183 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux")
184 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6")
185 ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0")
186 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long, __PAGE_OFFSET)
187 #ifdef CONFIG_XEN_COMPAT_030002
188 ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, __PAGE_OFFSET)
190 ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .long, 0)
191 #endif /* !CONFIG_XEN_COMPAT_030002 */
192 ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .long, startup_32)
193 ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .long, hypercall_page)
194 ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
195 #ifdef CONFIG_X86_PAE
196 ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes")
198 ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "no")
200 ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic")