diff options
Diffstat (limited to 'arch/ia64/kernel/entry.S')
| -rw-r--r-- | arch/ia64/kernel/entry.S | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S index 3c331c464b4..b0be4a28017 100644 --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -710,6 +710,16 @@ ENTRY(ia64_leave_syscall) (pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk #endif .work_processed_syscall: +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + adds r2=PT(LOADRS)+16,r12 +(pUStk) mov.m r22=ar.itc // fetch time at leave + adds r18=TI_FLAGS+IA64_TASK_SIZE,r13 + ;; +(p6) ld4 r31=[r18] // load current_thread_info()->flags + ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs" + adds r3=PT(AR_BSPSTORE)+16,r12 // deferred + ;; +#else adds r2=PT(LOADRS)+16,r12 adds r3=PT(AR_BSPSTORE)+16,r12 adds r18=TI_FLAGS+IA64_TASK_SIZE,r13 @@ -718,6 +728,7 @@ ENTRY(ia64_leave_syscall) ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs" nop.i 0 ;; +#endif mov r16=ar.bsp // M2 get existing backing store pointer ld8 r18=[r2],PT(R9)-PT(B6) // load b6 (p6) and r15=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE? @@ -737,12 +748,21 @@ ENTRY(ia64_leave_syscall) ld8 r29=[r2],16 // M0|1 load cr.ipsr ld8 r28=[r3],16 // M0|1 load cr.iip +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +(pUStk) add r14=TI_AC_LEAVE+IA64_TASK_SIZE,r13 + ;; + ld8 r30=[r2],16 // M0|1 load cr.ifs + ld8 r25=[r3],16 // M0|1 load ar.unat +(pUStk) add r15=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 + ;; +#else mov r22=r0 // A clear r22 ;; ld8 r30=[r2],16 // M0|1 load cr.ifs ld8 r25=[r3],16 // M0|1 load ar.unat (pUStk) add r14=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13 ;; +#endif ld8 r26=[r2],PT(B0)-PT(AR_PFS) // M0|1 load ar.pfs (pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled nop 0 @@ -759,7 +779,11 @@ ENTRY(ia64_leave_syscall) ld8.fill r1=[r3],16 // M0|1 load r1 (pUStk) mov r17=1 // A ;; +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +(pUStk) st1 [r15]=r17 // M2|3 +#else (pUStk) st1 [r14]=r17 // M2|3 +#endif ld8.fill r13=[r3],16 // M0|1 mov f8=f0 // F clear f8 ;; @@ -775,12 +799,22 @@ ENTRY(ia64_leave_syscall) shr.u r18=r19,16 // I0|1 get byte size of existing "dirty" partition cover // B add current frame into dirty partition & set cr.ifs ;; +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + mov r19=ar.bsp // M2 get new backing store pointer + st8 [r14]=r22 // M save time at leave + mov f10=f0 // F clear f10 + + mov r22=r0 // A clear r22 + movl r14=__kernel_syscall_via_epc // X + ;; +#else mov r19=ar.bsp // M2 get new backing store pointer mov f10=f0 // F clear f10 nop.m 0 movl r14=__kernel_syscall_via_epc // X ;; +#endif mov.m ar.csd=r0 // M2 clear ar.csd mov.m ar.ccv=r0 // M2 clear ar.ccv mov b7=r14 // I0 clear b7 (hint with __kernel_syscall_via_epc) @@ -913,10 +947,18 @@ GLOBAL_ENTRY(ia64_leave_kernel) adds r16=PT(CR_IPSR)+16,r12 adds r17=PT(CR_IIP)+16,r12 +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + .pred.rel.mutex pUStk,pKStk +(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled +(pUStk) mov.m r22=ar.itc // M fetch time at leave + nop.i 0 + ;; +#else (pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled nop.i 0 nop.i 0 ;; +#endif ld8 r29=[r16],16 // load cr.ipsr ld8 r28=[r17],16 // load cr.iip ;; @@ -938,15 +980,37 @@ GLOBAL_ENTRY(ia64_leave_kernel) ;; ld8.fill r12=[r16],16 ld8.fill r13=[r17],16 +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +(pUStk) adds r3=TI_AC_LEAVE+IA64_TASK_SIZE,r18 +#else (pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 +#endif ;; ld8 r20=[r16],16 // ar.fpsr ld8.fill r15=[r17],16 +#ifdef CONFIG_VIRT_CPU_ACCOUNTING +(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 // deferred +#endif ;; ld8.fill r14=[r16],16 ld8.fill r2=[r17] (pUStk) mov r17=1 ;; +#ifdef CONFIG_VIRT_CPU_ACCOUNTING + // mmi_ : ld8 st1 shr;; mmi_ : st8 st1 shr;; + // mib : mov add br -> mib : ld8 add br + // bbb_ : br nop cover;; mbb_ : mov br cover;; + // + // no one require bsp in r16 if (pKStk) branch is selected. +(pUStk) st8 [r3]=r22 // save time at leave +(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack + shr.u r18=r19,16 // get byte size of existing "dirty" partition + ;; + ld8.fill r3=[r16] // deferred + LOAD_PHYS_STACK_REG_SIZE(r17) +(pKStk) br.cond.dpnt skip_rbs_switch + mov r16=ar.bsp // get existing backing store pointer +#else ld8.fill r3=[r16] (pUStk) st1 [r18]=r17 // restore current->thread.on_ustack shr.u r18=r19,16 // get byte size of existing "dirty" partition @@ -954,6 +1018,7 @@ GLOBAL_ENTRY(ia64_leave_kernel) mov r16=ar.bsp // get existing backing store pointer LOAD_PHYS_STACK_REG_SIZE(r17) (pKStk) br.cond.dpnt skip_rbs_switch +#endif /* * Restore user backing store. |