diff options
| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2009-03-04 21:05:39 +0900 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2009-03-26 10:50:32 -0700 |
| commit | 496203b15b7249599712525c2b6aafe231b4628d (patch) | |
| tree | ee8c5dbe02b820ac208fe6f3b7982a49a502cc28 /arch/ia64/include/asm/xen/inst.h | |
| parent | 94752a794ddfdef65289a16627faefa7e2e62d58 (diff) | |
ia64/pv_ops/xen: paravirtualize read/write ar.itc and ar.itm
paravirtualize ar.itc and ar.itm in order to support save/restore.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include/asm/xen/inst.h')
| -rw-r--r-- | arch/ia64/include/asm/xen/inst.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/xen/inst.h b/arch/ia64/include/asm/xen/inst.h index e8e01b28d2a..90537dc15ef 100644 --- a/arch/ia64/include/asm/xen/inst.h +++ b/arch/ia64/include/asm/xen/inst.h @@ -113,6 +113,27 @@ .endm #define MOV_FROM_PSR(pred, reg, clob) __MOV_FROM_PSR pred, reg, clob +/* assuming ar.itc is read with interrupt disabled. */ +#define MOV_FROM_ITC(pred, pred_clob, reg, clob) \ +(pred) movl clob = XSI_ITC_OFFSET; \ + ;; \ +(pred) ld8 clob = [clob]; \ +(pred) mov reg = ar.itc; \ + ;; \ +(pred) add reg = reg, clob; \ + ;; \ +(pred) movl clob = XSI_ITC_LAST; \ + ;; \ +(pred) ld8 clob = [clob]; \ + ;; \ +(pred) cmp.geu.unc pred_clob, p0 = clob, reg; \ + ;; \ +(pred_clob) add reg = 1, clob; \ + ;; \ +(pred) movl clob = XSI_ITC_LAST; \ + ;; \ +(pred) st8 [clob] = reg + #define MOV_TO_IFA(reg, clob) \ movl clob = XSI_IFA; \ |