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#ifdef CONFIG_XEN_PV 20 __INIT 21ENTRY(startup_xen) 22 cld 23 24 /* Clear .bss */ 25 xor %eax,%eax 26 mov $__bss_start, %_ASM_DI 27 mov $__bss_stop, %_ASM_CX 28 sub %_ASM_DI, %_ASM_CX 29 shr $__ASM_SEL(2, 3), %_ASM_CX 30 rep __ASM_SIZE(stos) 31 32 mov %_ASM_SI, xen_start_info 33 mov $init_thread_union+THREAD_SIZE, %_ASM_SP 34 35 jmp xen_start_kernel 36 37 __FINIT 38#endif 39 40.pushsection .text 41 .balign PAGE_SIZE 42ENTRY(hypercall_page) 43 .skip PAGE_SIZE 44 45#define HYPERCALL(n) \ 46 .equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \ 47 .type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32 48#include <asm/xen-hypercalls.h> 49#undef HYPERCALL 50 51.popsection 52 53 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") 54 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") 55 ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") 56#ifdef CONFIG_X86_32 57 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET) 58#else 59 ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map) 60 /* Map the p2m table to a 512GB-aligned user address. */ 61 ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad (PUD_SIZE * PTRS_PER_PUD)) 62#endif 63#ifdef CONFIG_XEN_PV 64 ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen) 65#endif 66 ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page) 67 ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, 68 .ascii "!writable_page_tables|pae_pgdir_above_4gb") 69 ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, 70 .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0)) 71 ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes") 72 ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic") 73 ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, 74 .quad _PAGE_PRESENT; .quad _PAGE_PRESENT) 75 ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1) 76 ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1) 77 ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START) 78 ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0) 79 80#endif /*CONFIG_XEN */ 81