1/* Xen-specific pieces of head.S, intended to be included in the right 2 place in head.S */ 3 4#ifdef CONFIG_XEN 5 6#include <linux/elfnote.h> 7#include <linux/init.h> 8 9#include <asm/boot.h> 10#include <asm/asm.h> 11#include <asm/page_types.h> 12 13#include <xen/interface/elfnote.h> 14#include <xen/interface/features.h> 15#include <xen/interface/xen.h> 16#include <xen/interface/xen-mca.h> 17#include <asm/xen/interface.h> 18 19 __INIT 20ENTRY(startup_xen) 21 cld 22 23 /* Clear .bss */ 24 xor %eax,%eax 25 mov $__bss_start, %_ASM_DI 26 mov $__bss_stop, %_ASM_CX 27 sub %_ASM_DI, %_ASM_CX 28 shr $__ASM_SEL(2, 3), %_ASM_CX 29 rep __ASM_SIZE(stos) 30 31 mov %_ASM_SI, xen_start_info 32 mov $init_thread_union+THREAD_SIZE, %_ASM_SP 33 34 jmp xen_start_kernel 35 36 __FINIT 37 38.pushsection .text 39 .balign PAGE_SIZE 40ENTRY(hypercall_page) 41 .skip PAGE_SIZE 42 43#define HYPERCALL(n) \ 44 .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \ 45 .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32 46#include <asm/xen-hypercalls.h> 47#undef HYPERCALL 48 49.popsection 50 51 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") 52 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") 53 ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") 54#ifdef CONFIG_X86_32 55 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) 56#else 57 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) 58 /* Map the p2m table to a 512GB-aligned user address. */ 59 ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad PGDIR_SIZE) 60#endif 61 ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) 62 ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) 63 ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, 64 .ascii "!writable_page_tables|pae_pgdir_above_4gb") 65 ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, 66 .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0)) 67 ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") 68 ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") 69 ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, 70 .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) 71 ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) 72 ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) 73 ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) 74 ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) 75 76#endif /*CONFIG_XEN */ 77