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