projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 4f0234f4 DM |
1 | /* hvtramp.S: Hypervisor start-cpu trampoline code. |
| 2 | * | |
| b4f4372f | 3 | * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> |
| 4f0234f4 DM |
4 | */ |
| 5 | ||
| 0f7f22d9 | 6 | |
| 4f0234f4 DM |
7 | #include <asm/thread_info.h> |
| 8 | #include <asm/hypervisor.h> | |
| 9 | #include <asm/scratchpad.h> | |
| 10 | #include <asm/spitfire.h> | |
| 11 | #include <asm/hvtramp.h> | |
| 12 | #include <asm/pstate.h> | |
| 13 | #include <asm/ptrace.h> | |
| 41120551 | 14 | #include <asm/head.h> |
| 4f0234f4 | 15 | #include <asm/asi.h> |
| b4f4372f | 16 | #include <asm/pil.h> |
| 4f0234f4 | 17 | |
| 4f0234f4 DM |
18 | .align 8 |
| 19 | .globl hv_cpu_startup, hv_cpu_startup_end | |
| 20 | ||
| 21 | /* This code executes directly out of the hypervisor | |
| 22 | * with physical addressing (va==pa). %o0 contains | |
| 23 | * our client argument which for Linux points to | |
| 24 | * a descriptor data structure which defines the | |
| 25 | * MMU entries we need to load up. | |
| 26 | * | |
| 27 | * After we set things up we enable the MMU and call | |
| 28 | * into the kernel. | |
| 29 | * | |
| 30 | * First setup basic privileged cpu state. | |
| 31 | */ | |
| 32 | hv_cpu_startup: | |
| 41120551 | 33 | SET_GL(0) |
| b4f4372f | 34 | wrpr %g0, PIL_NORMAL_MAX, %pil |
| 4f0234f4 DM |
35 | wrpr %g0, 0, %canrestore |
| 36 | wrpr %g0, 0, %otherwin | |
| 37 | wrpr %g0, 6, %cansave | |
| 38 | wrpr %g0, 6, %cleanwin | |
| 39 | wrpr %g0, 0, %cwp | |
| 40 | wrpr %g0, 0, %wstate | |
| 41 | wrpr %g0, 0, %tl | |
| 42 | ||
| 43 | sethi %hi(sparc64_ttable_tl0), %g1 | |
| 44 | wrpr %g1, %tba | |
| 45 | ||
| 46 | mov %o0, %l0 | |
| 47 | ||
| 48 | lduw [%l0 + HVTRAMP_DESCR_CPU], %g1 | |
| 49 | mov SCRATCHPAD_CPUID, %g2 | |
| 50 | stxa %g1, [%g2] ASI_SCRATCHPAD | |
| 51 | ||
| 52 | ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_VA], %g2 | |
| 53 | stxa %g2, [%g0] ASI_SCRATCHPAD | |
| 54 | ||
| 55 | mov 0, %l1 | |
| 56 | lduw [%l0 + HVTRAMP_DESCR_NUM_MAPPINGS], %l2 | |
| 57 | add %l0, HVTRAMP_DESCR_MAPS, %l3 | |
| 58 | ||
| 59 | 1: ldx [%l3 + HVTRAMP_MAPPING_VADDR], %o0 | |
| 60 | clr %o1 | |
| 61 | ldx [%l3 + HVTRAMP_MAPPING_TTE], %o2 | |
| 62 | mov HV_MMU_IMMU | HV_MMU_DMMU, %o3 | |
| 63 | mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 | |
| 64 | ta HV_FAST_TRAP | |
| 65 | ||
| 66 | brnz,pn %o0, 80f | |
| 67 | nop | |
| 68 | ||
| 69 | add %l1, 1, %l1 | |
| 70 | cmp %l1, %l2 | |
| 71 | blt,a,pt %xcc, 1b | |
| 72 | add %l3, HVTRAMP_MAPPING_SIZE, %l3 | |
| 73 | ||
| 74 | ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_PA], %o0 | |
| 75 | mov HV_FAST_MMU_FAULT_AREA_CONF, %o5 | |
| 76 | ta HV_FAST_TRAP | |
| 77 | ||
| 78 | brnz,pn %o0, 80f | |
| 79 | nop | |
| 80 | ||
| 81 | wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate | |
| 82 | ||
| 83 | ldx [%l0 + HVTRAMP_DESCR_THREAD_REG], %l6 | |
| 84 | ||
| 85 | mov 1, %o0 | |
| 86 | set 1f, %o1 | |
| 87 | mov HV_FAST_MMU_ENABLE, %o5 | |
| 88 | ta HV_FAST_TRAP | |
| 89 | ||
| 90 | ba,pt %xcc, 80f | |
| 91 | nop | |
| 92 | ||
| 93 | 1: | |
| 94 | wr %g0, 0, %fprs | |
| 95 | wr %g0, ASI_P, %asi | |
| 96 | ||
| 97 | mov PRIMARY_CONTEXT, %g7 | |
| 98 | stxa %g0, [%g7] ASI_MMU | |
| 99 | membar #Sync | |
| 100 | ||
| 101 | mov SECONDARY_CONTEXT, %g7 | |
| 102 | stxa %g0, [%g7] ASI_MMU | |
| 103 | membar #Sync | |
| 104 | ||
| 105 | mov %l6, %g6 | |
| 106 | ldx [%g6 + TI_TASK], %g4 | |
| 107 | ||
| 108 | mov 1, %g5 | |
| 109 | sllx %g5, THREAD_SHIFT, %g5 | |
| 110 | sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5 | |
| 111 | add %g6, %g5, %sp | |
| 4f0234f4 DM |
112 | |
| 113 | call init_irqwork_curcpu | |
| 114 | nop | |
| 115 | call hard_smp_processor_id | |
| 116 | nop | |
| 117 | ||
| b434e719 DM |
118 | call sun4v_register_mondo_queues |
| 119 | nop | |
| 4f0234f4 DM |
120 | |
| 121 | call init_cur_cpu_trap | |
| 122 | mov %g6, %o0 | |
| 123 | ||
| 124 | wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate | |
| 125 | ||
| 126 | call smp_callin | |
| 127 | nop | |
| 87fa05ae | 128 | |
| 4f0234f4 DM |
129 | call cpu_panic |
| 130 | nop | |
| 131 | ||
| 132 | 80: ba,pt %xcc, 80b | |
| 133 | nop | |
| 134 | ||
| 135 | .align 8 | |
| 136 | hv_cpu_startup_end: |