diff options
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 52 |
1 files changed, 33 insertions, 19 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 6ff3cf50608..e9963d9f335 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -132,7 +132,7 @@ _GLOBAL(__secondary_hold) bne 100b #if defined(CONFIG_SMP) || defined(CONFIG_KEXEC) - LOAD_REG_IMMEDIATE(r4, .pSeries_secondary_smp_init) + LOAD_REG_IMMEDIATE(r4, .generic_secondary_smp_init) mtctr r4 mr r3,r24 bctr @@ -1484,19 +1484,17 @@ fwnmi_data_area: . = 0x8000 /* - * On pSeries, secondary processors spin in the following code. + * On pSeries and most other platforms, secondary processors spin + * in the following code. * At entry, r3 = this processor's number (physical cpu id) */ -_GLOBAL(pSeries_secondary_smp_init) +_GLOBAL(generic_secondary_smp_init) mr r24,r3 /* turn on 64-bit mode */ bl .enable_64b_mode isync - /* Copy some CPU settings from CPU 0 */ - bl .__restore_cpu_setup - /* Set up a paca value for this processor. Since we have the * physical cpu id in r24, we need to search the pacas to find * which logical id maps to our physical one. @@ -1522,15 +1520,28 @@ _GLOBAL(pSeries_secondary_smp_init) /* start. */ sync - /* Create a temp kernel stack for use before relocation is on. */ +#ifndef CONFIG_SMP + b 3b /* Never go on non-SMP */ +#else + cmpwi 0,r23,0 + beq 3b /* Loop until told to go */ + + /* See if we need to call a cpu state restore handler */ + LOAD_REG_IMMEDIATE(r23, cur_cpu_spec) + ld r23,0(r23) + ld r23,CPU_SPEC_RESTORE(r23) + cmpdi 0,r23,0 + beq 4f + ld r23,0(r23) + mtctr r23 + bctrl + +4: /* Create a temp kernel stack for use before relocation is on. */ ld r1,PACAEMERGSP(r13) subi r1,r1,STACK_FRAME_OVERHEAD - cmpwi 0,r23,0 -#ifdef CONFIG_SMP - bne .__secondary_start + b .__secondary_start #endif - b 3b /* Loop until told to go */ #ifdef CONFIG_PPC_ISERIES _STATIC(__start_initialization_iSeries) @@ -1611,7 +1622,16 @@ _GLOBAL(__start_initialization_multiplatform) bl .enable_64b_mode /* Setup some critical 970 SPRs before switching MMU off */ - bl .__970_cpu_preinit + mfspr r0,SPRN_PVR + srwi r0,r0,16 + cmpwi r0,0x39 /* 970 */ + beq 1f + cmpwi r0,0x3c /* 970FX */ + beq 1f + cmpwi r0,0x44 /* 970MP */ + bne 2f +1: bl .__cpu_preinit_ppc970 +2: /* Switch off MMU if not already */ LOAD_REG_IMMEDIATE(r4, .__after_prom_start - KERNELBASE) @@ -1782,7 +1802,7 @@ _GLOBAL(pmac_secondary_start) isync /* Copy some CPU settings from CPU 0 */ - bl .__restore_cpu_setup + bl .__restore_cpu_ppc970 /* pSeries do that early though I don't think we really need it */ mfmsr r3 @@ -1932,12 +1952,6 @@ _STATIC(start_here_multiplatform) mr r5,r26 bl .identify_cpu - /* Save some low level config HIDs of CPU0 to be copied to - * other CPUs later on, or used for suspend/resume - */ - bl .__save_cpu_setup - sync - /* Do very early kernel initializations, including initial hash table, * stab and slb setup before we turn on relocation. */ |