diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 49 |
1 files changed, 20 insertions, 29 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 0a0b5310f54a..6ba675b0cf7d 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -69,24 +69,20 @@ BEGIN_FTR_SECTION bne .Ltabort_syscall END_FTR_SECTION_IFSET(CPU_FTR_TM) #endif - andi. r10,r12,MSR_PR mr r10,r1 - addi r1,r1,-INT_FRAME_SIZE - beq- 1f ld r1,PACAKSAVE(r13) -1: std r10,0(r1) + std r10,0(r1) std r11,_NIP(r1) std r12,_MSR(r1) std r0,GPR0(r1) std r10,GPR1(r1) - beq 2f /* if from kernel mode */ #ifdef CONFIG_PPC_FSL_BOOK3E START_BTB_FLUSH_SECTION BTB_FLUSH(r10) END_BTB_FLUSH_SECTION #endif ACCOUNT_CPU_USER_ENTRY(r13, r10, r11) -2: std r2,GPR2(r1) + std r2,GPR2(r1) std r3,GPR3(r1) mfcr r2 std r4,GPR4(r1) @@ -122,14 +118,13 @@ END_BTB_FLUSH_SECTION #if defined(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) && defined(CONFIG_PPC_SPLPAR) BEGIN_FW_FTR_SECTION - beq 33f - /* if from user, see if there are any DTL entries to process */ + /* see if there are any DTL entries to process */ ld r10,PACALPPACAPTR(r13) /* get ptr to VPA */ ld r11,PACA_DTL_RIDX(r13) /* get log read index */ addi r10,r10,LPPACA_DTLIDX LDX_BE r10,0,r10 /* get log write index */ - cmpd cr1,r11,r10 - beq+ cr1,33f + cmpd r11,r10 + beq+ 33f bl accumulate_stolen_time REST_GPR(0,r1) REST_4GPRS(3,r1) @@ -203,6 +198,7 @@ system_call: /* label this so stack traces look sane */ mtctr r12 bctrl /* Call handler */ + /* syscall_exit can exit to kernel mode, via ret_from_kernel_thread */ .Lsyscall_exit: std r3,RESULT(r1) @@ -216,11 +212,6 @@ system_call: /* label this so stack traces look sane */ ld r12, PACA_THREAD_INFO(r13) ld r8,_MSR(r1) -#ifdef CONFIG_PPC_BOOK3S - /* No MSR:RI on BookE */ - andi. r10,r8,MSR_RI - beq- .Lunrecov_restore -#endif /* * This is a few instructions into the actual syscall exit path (which actually @@ -546,6 +537,7 @@ flush_count_cache: /* Save LR into r9 */ mflr r9 + // Flush the link stack .rept 64 bl .+4 .endr @@ -555,6 +547,11 @@ flush_count_cache: .balign 32 /* Restore LR */ 1: mtlr r9 + + // If we're just flushing the link stack, return here +3: nop + patch_site 3b patch__flush_link_stack_return + li r9,0x7fff mtctr r9 @@ -600,8 +597,7 @@ _GLOBAL(_switch) std r0,16(r1) stdu r1,-SWITCH_FRAME_SIZE(r1) /* r3-r13 are caller saved -- Cort */ - SAVE_8GPRS(14, r1) - SAVE_10GPRS(22, r1) + SAVE_NVGPRS(r1) std r0,_NIP(r1) /* Return to switch caller */ mfcr r23 std r23,_CCR(r1) @@ -725,8 +721,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) mtcrf 0xFF,r6 /* r3-r13 are destroyed -- Cort */ - REST_8GPRS(14, r1) - REST_10GPRS(22, r1) + REST_NVGPRS(r1) /* convert old thread to its task_struct for return value */ addi r3,r3,-THREAD @@ -849,7 +844,7 @@ resume_kernel: bne- 0b 1: -#ifdef CONFIG_PREEMPT +#ifdef CONFIG_PREEMPTION /* Check if we need to preempt */ andi. r0,r4,_TIF_NEED_RESCHED beq+ restore @@ -880,7 +875,7 @@ resume_kernel: li r10,MSR_RI mtmsrd r10,1 /* Update machine state */ #endif /* CONFIG_PPC_BOOK3E */ -#endif /* CONFIG_PREEMPT */ +#endif /* CONFIG_PREEMPTION */ .globl fast_exc_return_irq fast_exc_return_irq: @@ -1158,8 +1153,7 @@ _GLOBAL(enter_rtas) */ SAVE_GPR(2, r1) /* Save the TOC */ SAVE_GPR(13, r1) /* Save paca */ - SAVE_8GPRS(14, r1) /* Save the non-volatiles */ - SAVE_10GPRS(22, r1) /* ditto */ + SAVE_NVGPRS(r1) /* Save the non-volatiles */ mfcr r4 std r4,_CCR(r1) @@ -1266,8 +1260,7 @@ rtas_restore_regs: /* relocation is on at this point */ REST_GPR(2, r1) /* Restore the TOC */ REST_GPR(13, r1) /* Restore paca */ - REST_8GPRS(14, r1) /* Restore the non-volatiles */ - REST_10GPRS(22, r1) /* ditto */ + REST_NVGPRS(r1) /* Restore the non-volatiles */ GET_PACA(r13) @@ -1301,8 +1294,7 @@ _GLOBAL(enter_prom) */ SAVE_GPR(2, r1) SAVE_GPR(13, r1) - SAVE_8GPRS(14, r1) - SAVE_10GPRS(22, r1) + SAVE_NVGPRS(r1) mfcr r10 mfmsr r11 std r10,_CCR(r1) @@ -1346,8 +1338,7 @@ _GLOBAL(enter_prom) /* Restore other registers */ REST_GPR(2, r1) REST_GPR(13, r1) - REST_8GPRS(14, r1) - REST_10GPRS(22, r1) + REST_NVGPRS(r1) ld r4,_CCR(r1) mtcr r4 |
