1 files changed, 6 insertions, 105 deletions

diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 7ebb73665e9d..2b21ec499285 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -137,7 +137,7 @@ _GLOBAL(__secondary_hold)
         ori     r24,r24,MSR_RI
         mtmsrd  r24                     /* RI on */
 
-        /* Grab our linux cpu number */
+        /* Grab our physical cpu number */
         mr      r24,r3
 
         /* Tell the master cpu we're here */
@@ -151,12 +151,7 @@ _GLOBAL(__secondary_hold)
         cmpdi   0,r4,1
         bne     100b
 
-#ifdef CONFIG_HMT
-        SET_REG_IMMEDIATE(r4, .hmt_init)
-        mtctr   r4
-        bctr
-#else
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
         LOAD_REG_IMMEDIATE(r4, .pSeries_secondary_smp_init)
         mtctr   r4
         mr      r3,r24
@@ -164,7 +159,6 @@ _GLOBAL(__secondary_hold)
 #else
         BUG_OPCODE
 #endif
-#endif
 
 /* This value is used to mark exception frames on the stack. */
         .section ".toc","aw"
@@ -319,7 +313,6 @@ exception_marker:
 label##_pSeries:                                        \
         HMT_MEDIUM;                                     \
         mtspr   SPRN_SPRG1,r13;         /* save r13 */  \
-        RUNLATCH_ON(r13);                               \
         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
 
 #define STD_EXCEPTION_ISERIES(n, label, area)           \
@@ -327,7 +320,6 @@ label##_pSeries:					\
 label##_iSeries:                                        \
         HMT_MEDIUM;                                     \
         mtspr   SPRN_SPRG1,r13;         /* save r13 */  \
-        RUNLATCH_ON(r13);                               \
         EXCEPTION_PROLOG_ISERIES_1(area);               \
         EXCEPTION_PROLOG_ISERIES_2;                     \
         b       label##_common
@@ -337,7 +329,6 @@ label##_iSeries:					\
 label##_iSeries:                                                        \
         HMT_MEDIUM;                                                     \
         mtspr   SPRN_SPRG1,r13;         /* save r13 */                  \
-        RUNLATCH_ON(r13);                                               \
         EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN);                         \
         lbz     r10,PACAPROCENABLED(r13);                               \
         cmpwi   0,r10,0;                                                \
@@ -390,6 +381,7 @@ label##_common:						\
 label##_common:                                         \
         EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN);      \
         DISABLE_INTS;                                   \
+        bl      .ppc64_runlatch_on;                     \
         addi    r3,r1,STACK_FRAME_OVERHEAD;             \
         bl      hdlr;                                   \
         b       .ret_from_except_lite
@@ -407,7 +399,6 @@ __start_interrupts:
 _machine_check_pSeries:
         HMT_MEDIUM
         mtspr   SPRN_SPRG1,r13          /* save r13 */
-        RUNLATCH_ON(r13)
         EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
         . = 0x300
@@ -434,7 +425,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
 data_access_slb_pSeries:
         HMT_MEDIUM
         mtspr   SPRN_SPRG1,r13
-        RUNLATCH_ON(r13)
         mfspr   r13,SPRN_SPRG3          /* get paca address into r13 */
         std     r3,PACA_EXSLB+EX_R3(r13)
         mfspr   r3,SPRN_DAR
@@ -460,7 +450,6 @@ data_access_slb_pSeries:
 instruction_access_slb_pSeries:
         HMT_MEDIUM
         mtspr   SPRN_SPRG1,r13
-        RUNLATCH_ON(r13)
         mfspr   r13,SPRN_SPRG3          /* get paca address into r13 */
         std     r3,PACA_EXSLB+EX_R3(r13)
         mfspr   r3,SPRN_SRR0            /* SRR0 is faulting address */
@@ -491,7 +480,6 @@ instruction_access_slb_pSeries:
         .globl  system_call_pSeries
 system_call_pSeries:
         HMT_MEDIUM
-        RUNLATCH_ON(r9)
         mr      r9,r13
         mfmsr   r10
         mfspr   r13,SPRN_SPRG3
@@ -575,7 +563,6 @@ slb_miss_user_pseries:
 system_reset_fwnmi:
         HMT_MEDIUM
         mtspr   SPRN_SPRG1,r13          /* save r13 */
-        RUNLATCH_ON(r13)
         EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, system_reset_common)
 
         .globl machine_check_fwnmi
@@ -583,7 +570,6 @@ system_reset_fwnmi:
 machine_check_fwnmi:
         HMT_MEDIUM
         mtspr   SPRN_SPRG1,r13          /* save r13 */
-        RUNLATCH_ON(r13)
         EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common)
 
 #ifdef CONFIG_PPC_ISERIES
@@ -894,7 +880,6 @@ unrecov_fer:
         .align  7
         .globl data_access_common
 data_access_common:
-        RUNLATCH_ON(r10)                /* It wont fit in the 0x300 handler */
         mfspr   r10,SPRN_DAR
         std     r10,PACA_EXGEN+EX_DAR(r13)
         mfspr   r10,SPRN_DSISR
@@ -1042,6 +1027,7 @@ hardware_interrupt_common:
         EXCEPTION_PROLOG_COMMON(0x500, PACA_EXGEN)
 hardware_interrupt_entry:
         DISABLE_INTS
+        bl      .ppc64_runlatch_on
         addi    r3,r1,STACK_FRAME_OVERHEAD
         bl      .do_IRQ
         b       .ret_from_except_lite
@@ -1816,22 +1802,6 @@ _STATIC(start_here_multiplatform)
         ori     r6,r6,MSR_RI
         mtmsrd  r6                      /* RI on */
 
-#ifdef CONFIG_HMT
-        /* Start up the second thread on cpu 0 */
-        mfspr   r3,SPRN_PVR
-        srwi    r3,r3,16
-        cmpwi   r3,0x34                 /* Pulsar  */
-        beq     90f
-        cmpwi   r3,0x36                 /* Icestar */
-        beq     90f
-        cmpwi   r3,0x37                 /* SStar   */
-        beq     90f
-        b       91f                     /* HMT not supported */
-90:     li      r3,0
-        bl      .hmt_start_secondary
-91:
-#endif
-
         /* The following gets the stack and TOC set up with the regs */
         /* pointing to the real addr of the kernel stack.  This is   */
         /* all done to support the C function call below which sets  */
@@ -1945,77 +1915,8 @@ _STATIC(start_here_common)
 
         bl .start_kernel
 
-_GLOBAL(hmt_init)
-#ifdef CONFIG_HMT
-        LOAD_REG_IMMEDIATE(r5, hmt_thread_data)
-        mfspr   r7,SPRN_PVR
-        srwi    r7,r7,16
-        cmpwi   r7,0x34                 /* Pulsar  */
-        beq     90f
-        cmpwi   r7,0x36                 /* Icestar */
-        beq     91f
-        cmpwi   r7,0x37                 /* SStar   */
-        beq     91f
-        b       101f
-90:     mfspr   r6,SPRN_PIR
-        andi.   r6,r6,0x1f
-        b       92f
-91:     mfspr   r6,SPRN_PIR
-        andi.   r6,r6,0x3ff
-92:     sldi    r4,r24,3
-        stwx    r6,r5,r4
-        bl      .hmt_start_secondary
-        b       101f
-
-__hmt_secondary_hold:
-        LOAD_REG_IMMEDIATE(r5, hmt_thread_data)
-        clrldi  r5,r5,4
-        li      r7,0
-        mfspr   r6,SPRN_PIR
-        mfspr   r8,SPRN_PVR
-        srwi    r8,r8,16
-        cmpwi   r8,0x34
-        bne     93f
-        andi.   r6,r6,0x1f
-        b       103f
-93:     andi.   r6,r6,0x3f
-
-103:    lwzx    r8,r5,r7
-        cmpw    r8,r6
-        beq     104f
-        addi    r7,r7,8
-        b       103b
-
-104:    addi    r7,r7,4
-        lwzx    r9,r5,r7
-        mr      r24,r9
-101:
-#endif
-        mr      r3,r24
-        b       .pSeries_secondary_smp_init
-
-#ifdef CONFIG_HMT
-_GLOBAL(hmt_start_secondary)
-        LOAD_REG_IMMEDIATE(r4,__hmt_secondary_hold)
-        clrldi  r4,r4,4
-        mtspr   SPRN_NIADORM, r4
-        mfspr   r4, SPRN_MSRDORM
-        li      r5, -65
-        and     r4, r4, r5
-        mtspr   SPRN_MSRDORM, r4
-        lis     r4,0xffef
-        ori     r4,r4,0x7403
-        mtspr   SPRN_TSC, r4
-        li      r4,0x1f4
-        mtspr   SPRN_TST, r4
-        mfspr   r4, SPRN_HID0
-        ori     r4, r4, 0x1
-        mtspr   SPRN_HID0, r4
-        mfspr   r4, SPRN_CTRLF
-        oris    r4, r4, 0x40
-        mtspr   SPRN_CTRLT, r4
-        blr
-#endif
+        /* Not reached */
+        BUG_OPCODE
 
 /*
  * We put a few things here that have to be page-aligned.