Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[pandora-kernel.git] / arch / ia64 / kernel / minstate.h

diff --git a/arch/ia64/kernel/minstate.h b/arch/ia64/kernel/minstate.h
index 7c548ac..292e214 100644 (file)
--- a/arch/ia64/kernel/minstate.h
+++ b/arch/ia64/kernel/minstate.h
@@ -2,6 +2,7 @@
 #include <asm/cache.h>
 
 #include "entry.h"
+#include "paravirt_inst.h"
 
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 /* read ar.itc in advance, and use it before leaving bank 0 */
@@ -15,6 +16,9 @@
 #define ACCOUNT_SYS_ENTER
 #endif
 
+.section ".data.patch.rse", "a"
+.previous
+
 /*
  * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
  * the minimum state necessary that allows us to turn psr.ic back
@@ -40,16 +44,16 @@
  * Note that psr.ic is NOT turned on by this macro.  This is so that
  * we can pass interruption state as arguments to a handler.
  */
-#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA)                                                      \
+#define IA64_NATIVE_DO_SAVE_MIN(__COVER,SAVE_IFS,EXTRA,WORKAROUND)                             \
        mov r16=IA64_KR(CURRENT);       /* M */                                                 \
        mov r27=ar.rsc;                 /* M */                                                 \
        mov r20=r1;                     /* A */                                                 \
        mov r25=ar.unat;                /* M */                                                 \
-       mov r29=cr.ipsr;                /* M */                                                 \
+       MOV_FROM_IPSR(p0,r29);          /* M */                                                 \
        mov r26=ar.pfs;                 /* I */                                                 \
-       mov r28=cr.iip;                 /* M */                                                 \
+       MOV_FROM_IIP(r28);                      /* M */                                         \
        mov r21=ar.fpsr;                /* M */                                                 \
-       COVER;                          /* B;; (or nothing) */                                  \
+       __COVER;                                /* B;; (or nothing) */                          \
        ;;                                                                                      \
        adds r16=IA64_TASK_THREAD_ON_USTACK_OFFSET,r16;                                         \
        ;;                                                                                      \
@@ -87,6 +91,7 @@
        tbit.nz p15,p0=r29,IA64_PSR_I_BIT;                                                      \
        mov r29=b0                                                                              \
        ;;                                                                                      \
+       WORKAROUND;                                                                             \
        adds r16=PT(R8),r1;     /* initialize first base pointer */                             \
        adds r17=PT(R9),r1;     /* initialize second base pointer */                            \
 (pKStk)        mov r18=r0;             /* make sure r18 isn't NaT */                                   \
@@ -206,6 +211,40 @@
        st8 [r25]=r10;          /* ar.ssd */    \
        ;;
 
-#define SAVE_MIN_WITH_COVER    DO_SAVE_MIN(cover, mov r30=cr.ifs,)
-#define SAVE_MIN_WITH_COVER_R19        DO_SAVE_MIN(cover, mov r30=cr.ifs, mov r15=r19)
-#define SAVE_MIN               DO_SAVE_MIN(     , mov r30=r0, )
+#define RSE_WORKAROUND                         \
+(pUStk) extr.u r17=r18,3,6;                    \
+(pUStk)        sub r16=r18,r22;                        \
+[1:](pKStk)    br.cond.sptk.many 1f;           \
+       .xdata4 ".data.patch.rse",1b-.          \
+       ;;                                      \
+       cmp.ge p6,p7 = 33,r17;                  \
+       ;;                                      \
+(p6)   mov r17=0x310;                          \
+(p7)   mov r17=0x308;                          \
+       ;;                                      \
+       cmp.leu p1,p0=r16,r17;                  \
+(p1)   br.cond.sptk.many 1f;                   \
+       dep.z r17=r26,0,62;                     \
+       movl r16=2f;                            \
+       ;;                                      \
+       mov ar.pfs=r17;                         \
+       dep r27=r0,r27,16,14;                   \
+       mov b0=r16;                             \
+       ;;                                      \
+       br.ret.sptk b0;                         \
+       ;;                                      \
+2:                                             \
+       mov ar.rsc=r0                           \
+       ;;                                      \
+       flushrs;                                \
+       ;;                                      \
+       mov ar.bspstore=r22                     \
+       ;;                                      \
+       mov r18=ar.bsp;                         \
+       ;;                                      \
+1:                                             \
+       .pred.rel "mutex", pKStk, pUStk
+
+#define SAVE_MIN_WITH_COVER    DO_SAVE_MIN(COVER, mov r30=cr.ifs, , RSE_WORKAROUND)
+#define SAVE_MIN_WITH_COVER_R19        DO_SAVE_MIN(COVER, mov r30=cr.ifs, mov r15=r19, RSE_WORKAROUND)
+#define SAVE_MIN                       DO_SAVE_MIN(     , mov r30=r0, , )