1/* 2 * Support routines for Xen 3 * 4 * Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@hp.com> 5 */ 6 7#include <asm/processor.h> 8#include <asm/asmmacro.h> 9#include <asm/pgtable.h> 10#include <asm/system.h> 11#include <asm/paravirt.h> 12#include <asm/xen/privop.h> 13#include <linux/elfnote.h> 14#include <linux/init.h> 15#include <xen/interface/elfnote.h> 16 17 .section .data..read_mostly 18 .align 8 19 .global xen_domain_type 20xen_domain_type: 21 data4 XEN_NATIVE_ASM 22 .previous 23 24 __INIT 25ENTRY(startup_xen) 26 // Calculate load offset. 27 // The constant, LOAD_OFFSET, can't be used because the boot 28 // loader doesn't always load to the LMA specified by the vmlinux.lds. 29 mov r9=ip // must be the first instruction to make sure 30 // that r9 = the physical address of startup_xen. 31 // Usually r9 = startup_xen - LOAD_OFFSET 32 movl r8=startup_xen 33 ;; 34 sub r9=r9,r8 // Usually r9 = -LOAD_OFFSET. 35 36 mov r10=PARAVIRT_HYPERVISOR_TYPE_XEN 37 movl r11=_start 38 ;; 39 add r11=r11,r9 40 movl r8=hypervisor_type 41 ;; 42 add r8=r8,r9 43 mov b0=r11 44 ;; 45 st8 [r8]=r10 46 br.cond.sptk.many b0 47 ;; 48END(startup_xen) 49 50 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux") 51 ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6") 52 ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0") 53 ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, data8.ua startup_xen - LOAD_OFFSET) 54 55#define isBP p3 // are we the Bootstrap Processor? 56 57GLOBAL_ENTRY(xen_setup_hook) 58 mov r8=XEN_PV_DOMAIN_ASM 59(isBP) movl r9=xen_domain_type;; 60(isBP) st4 [r9]=r8 61 movl r10=xen_ivt;; 62 63 mov cr.iva=r10 64 65 /* Set xsi base. */ 66#define FW_HYPERCALL_SET_SHARED_INFO_VA 0x600 67(isBP) mov r2=FW_HYPERCALL_SET_SHARED_INFO_VA 68(isBP) movl r28=XSI_BASE;; 69(isBP) break 0x1000;; 70 71 /* setup pv_ops */ 72(isBP) mov r4=rp 73 ;; 74(isBP) br.call.sptk.many rp=xen_setup_pv_ops 75 ;; 76(isBP) mov rp=r4 77 ;; 78 79 br.ret.sptk.many rp 80 ;; 81END(xen_setup_hook) 82