Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx> --- arch/ia64/xen/xenivt.S | 59 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 59 insertions(+), 0 deletions(-) create mode 100644 arch/ia64/xen/xenivt.S diff --git a/arch/ia64/xen/xenivt.S b/arch/ia64/xen/xenivt.S new file mode 100644 index 0000000..99bb37a --- /dev/null +++ b/arch/ia64/xen/xenivt.S @@ -0,0 +1,59 @@ +/* + * arch/ia64/xen/ivt.S + * + * Copyright (C) 2005 Hewlett-Packard Co + * Dan Magenheimer <dan.magenheimer@xxxxxx> + * + * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * pv_ops. + */ + +#include <asm/asmmacro.h> +#include <asm/kregs.h> +#include <asm/pgtable.h> + +#define __IA64_ASM_PARAVIRTUALIZED_XEN +#include "inst_xen.h" +#include "xenminstate.h" +#include "../kernel/minstate.h" + + .section .text,"ax" +GLOBAL_ENTRY(xen_event_callback) + mov r31=pr // prepare to save predicates + ;; + SAVE_MIN_WITH_COVER // uses r31; defines r2 and r3 + ;; + movl r3=XSI_PSR_IC + mov r14=1 + ;; + st4 [r3]=r14 + ;; + adds r3=8,r2 // set up second base pointer for SAVE_REST + srlz.i // ensure everybody knows psr.ic is back on + ;; + SAVE_REST + ;; +1: + alloc r14=ar.pfs,0,0,1,0 // must be first in an insn group + add out0=16,sp // pass pointer to pt_regs as first arg + ;; + br.call.sptk.many b0=xen_evtchn_do_upcall + ;; + movl r20=XSI_PSR_I_ADDR + ;; + ld8 r20=[r20] + ;; + adds r20=-1,r20 // vcpu_info->evtchn_upcall_pending + ;; + ld1 r20=[r20] + ;; + cmp.ne p6,p0=r20,r0 // if there are pending events, + (p6) br.spnt.few 1b // call evtchn_do_upcall again. + br.sptk.many ia64_leave_kernel +END(xen_event_callback) + +GLOBAL_ENTRY(xen_bsw1) + XEN_BSW_1(r14) + br.ret.sptk.many b0 +END(xen_bsw1) -- 1.5.3 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
