| Isaku Yamahata | 080104c | 2008-10-17 11:17:58 +0900 | [diff] [blame] | 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> |
| Isaku Yamahata | 080104c | 2008-10-17 11:17:58 +0900 | [diff] [blame] | 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 | |
| Denys Vlasenko | 54cb27a | 2010-02-20 01:03:44 +0100 | [diff] [blame] | 16 | .section .data..read_mostly |
| Isaku Yamahata | 080104c | 2008-10-17 11:17:58 +0900 | [diff] [blame] | 17 | .align 8 |
| 18 | .global xen_domain_type |
| 19 | xen_domain_type: |
| 20 | data4 XEN_NATIVE_ASM |
| 21 | .previous |
| 22 | |
| 23 | __INIT |
| 24 | ENTRY(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 | ;; |
| 47 | END(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 | |
| Isaku Yamahata | 080104c | 2008-10-17 11:17:58 +0900 | [diff] [blame] | 56 | GLOBAL_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 | ;; |
| 80 | END(xen_setup_hook) |