| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * trampoline.S: Jump start slave processors on sparc64. |
| * |
| * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
| */ |
| |
| |
| #include <linux/pgtable.h> |
| #include <asm/head.h> |
| #include <asm/asi.h> |
| #include <asm/lsu.h> |
| #include <asm/dcr.h> |
| #include <asm/dcu.h> |
| #include <asm/pstate.h> |
| #include <asm/page.h> |
| #include <asm/spitfire.h> |
| #include <asm/processor.h> |
| #include <asm/thread_info.h> |
| #include <asm/mmu.h> |
| #include <asm/hypervisor.h> |
| #include <asm/cpudata.h> |
| |
| .data |
| .align 8 |
| call_method: |
| .asciz "call-method" |
| .align 8 |
| itlb_load: |
| .asciz "SUNW,itlb-load" |
| .align 8 |
| dtlb_load: |
| .asciz "SUNW,dtlb-load" |
| |
| #define TRAMP_STACK_SIZE 1024 |
| .align 16 |
| tramp_stack: |
| .skip TRAMP_STACK_SIZE |
| |
| .align 8 |
| .globl sparc64_cpu_startup, sparc64_cpu_startup_end |
| sparc64_cpu_startup: |
| BRANCH_IF_SUN4V(g1, niagara_startup) |
| BRANCH_IF_CHEETAH_BASE(g1, g5, cheetah_startup) |
| BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1, g5, cheetah_plus_startup) |
| |
| ba,pt %xcc, spitfire_startup |
| nop |
| |
| cheetah_plus_startup: |
| /* Preserve OBP chosen DCU and DCR register settings. */ |
| ba,pt %xcc, cheetah_generic_startup |
| nop |
| |
| cheetah_startup: |
| mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1 |
| wr %g1, %asr18 |
| |
| sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5 |
| or %g5, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g5 |
| sllx %g5, 32, %g5 |
| or %g5, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g5 |
| stxa %g5, [%g0] ASI_DCU_CONTROL_REG |
| membar #Sync |
| /* fallthru */ |
| |
| cheetah_generic_startup: |
| mov TSB_EXTENSION_P, %g3 |
| stxa %g0, [%g3] ASI_DMMU |
| stxa %g0, [%g3] ASI_IMMU |
| membar #Sync |
| |
| mov TSB_EXTENSION_S, %g3 |
| stxa %g0, [%g3] ASI_DMMU |
| membar #Sync |
| |
| mov TSB_EXTENSION_N, %g3 |
| stxa %g0, [%g3] ASI_DMMU |
| stxa %g0, [%g3] ASI_IMMU |
| membar #Sync |
| /* fallthru */ |
| |
| niagara_startup: |
| /* Disable STICK_INT interrupts. */ |
| sethi %hi(0x80000000), %g5 |
| sllx %g5, 32, %g5 |
| wr %g5, %asr25 |
| |
| ba,pt %xcc, startup_continue |
| nop |
| |
| spitfire_startup: |
| mov (LSU_CONTROL_IC | LSU_CONTROL_DC | LSU_CONTROL_IM | LSU_CONTROL_DM), %g1 |
| stxa %g1, [%g0] ASI_LSU_CONTROL |
| membar #Sync |
| |
| startup_continue: |
| mov %o0, %l0 |
| BRANCH_IF_SUN4V(g1, niagara_lock_tlb) |
| |
| sethi %hi(0x80000000), %g2 |
| sllx %g2, 32, %g2 |
| wr %g2, 0, %tick_cmpr |
| |
| /* Call OBP by hand to lock KERNBASE into i/d tlbs. |
| * We lock 'num_kernel_image_mappings' consequetive entries. |
| */ |
| sethi %hi(prom_entry_lock), %g2 |
| 1: ldstub [%g2 + %lo(prom_entry_lock)], %g1 |
| brnz,pn %g1, 1b |
| nop |
| |
| /* Get onto temporary stack which will be in the locked |
| * kernel image. |
| */ |
| sethi %hi(tramp_stack), %g1 |
| or %g1, %lo(tramp_stack), %g1 |
| add %g1, TRAMP_STACK_SIZE, %g1 |
| sub %g1, STACKFRAME_SZ + STACK_BIAS + 256, %sp |
| flushw |
| |
| /* Setup the loop variables: |
| * %l3: VADDR base |
| * %l4: TTE base |
| * %l5: Loop iterator, iterates from 0 to 'num_kernel_image_mappings' |
| * %l6: Number of TTE entries to map |
| * %l7: Highest TTE entry number, we count down |
| */ |
| sethi %hi(KERNBASE), %l3 |
| sethi %hi(kern_locked_tte_data), %l4 |
| ldx [%l4 + %lo(kern_locked_tte_data)], %l4 |
| clr %l5 |
| sethi %hi(num_kernel_image_mappings), %l6 |
| lduw [%l6 + %lo(num_kernel_image_mappings)], %l6 |
| |
| mov 15, %l7 |
| BRANCH_IF_ANY_CHEETAH(g1,g5,2f) |
| |
| mov 63, %l7 |
| 2: |
| |
| 3: |
| /* Lock into I-MMU */ |
| sethi %hi(call_method), %g2 |
| or %g2, %lo(call_method), %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 5, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| sethi %hi(itlb_load), %g2 |
| or %g2, %lo(itlb_load), %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x18] |
| sethi %hi(prom_mmu_ihandle_cache), %g2 |
| lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x20] |
| |
| /* Each TTE maps 4MB, convert index to offset. */ |
| sllx %l5, 22, %g1 |
| |
| add %l3, %g1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x28] ! VADDR |
| add %l4, %g1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x30] ! TTE |
| |
| /* TTE index is highest minus loop index. */ |
| sub %l7, %l5, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x38] |
| |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| /* Lock into D-MMU */ |
| sethi %hi(call_method), %g2 |
| or %g2, %lo(call_method), %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 5, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| sethi %hi(dtlb_load), %g2 |
| or %g2, %lo(dtlb_load), %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x18] |
| sethi %hi(prom_mmu_ihandle_cache), %g2 |
| lduw [%g2 + %lo(prom_mmu_ihandle_cache)], %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x20] |
| |
| /* Each TTE maps 4MB, convert index to offset. */ |
| sllx %l5, 22, %g1 |
| |
| add %l3, %g1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x28] ! VADDR |
| add %l4, %g1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x30] ! TTE |
| |
| /* TTE index is highest minus loop index. */ |
| sub %l7, %l5, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x38] |
| |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| add %l5, 1, %l5 |
| cmp %l5, %l6 |
| bne,pt %xcc, 3b |
| nop |
| |
| sethi %hi(prom_entry_lock), %g2 |
| stb %g0, [%g2 + %lo(prom_entry_lock)] |
| |
| ba,pt %xcc, after_lock_tlb |
| nop |
| |
| niagara_lock_tlb: |
| sethi %hi(KERNBASE), %l3 |
| sethi %hi(kern_locked_tte_data), %l4 |
| ldx [%l4 + %lo(kern_locked_tte_data)], %l4 |
| clr %l5 |
| sethi %hi(num_kernel_image_mappings), %l6 |
| lduw [%l6 + %lo(num_kernel_image_mappings)], %l6 |
| |
| 1: |
| mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 |
| sllx %l5, 22, %g2 |
| add %l3, %g2, %o0 |
| clr %o1 |
| add %l4, %g2, %o2 |
| mov HV_MMU_IMMU, %o3 |
| ta HV_FAST_TRAP |
| |
| mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 |
| sllx %l5, 22, %g2 |
| add %l3, %g2, %o0 |
| clr %o1 |
| add %l4, %g2, %o2 |
| mov HV_MMU_DMMU, %o3 |
| ta HV_FAST_TRAP |
| |
| add %l5, 1, %l5 |
| cmp %l5, %l6 |
| bne,pt %xcc, 1b |
| nop |
| |
| after_lock_tlb: |
| wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate |
| wr %g0, 0, %fprs |
| |
| wr %g0, ASI_P, %asi |
| |
| mov PRIMARY_CONTEXT, %g7 |
| |
| 661: stxa %g0, [%g7] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g0, [%g7] ASI_MMU |
| .previous |
| |
| membar #Sync |
| mov SECONDARY_CONTEXT, %g7 |
| |
| 661: stxa %g0, [%g7] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g0, [%g7] ASI_MMU |
| .previous |
| |
| membar #Sync |
| |
| /* Everything we do here, until we properly take over the |
| * trap table, must be done with extreme care. We cannot |
| * make any references to %g6 (current thread pointer), |
| * %g4 (current task pointer), or %g5 (base of current cpu's |
| * per-cpu area) until we properly take over the trap table |
| * from the firmware and hypervisor. |
| * |
| * Get onto temporary stack which is in the locked kernel image. |
| */ |
| sethi %hi(tramp_stack), %g1 |
| or %g1, %lo(tramp_stack), %g1 |
| add %g1, TRAMP_STACK_SIZE, %g1 |
| sub %g1, STACKFRAME_SZ + STACK_BIAS + 256, %sp |
| mov 0, %fp |
| |
| /* Put garbage in these registers to trap any access to them. */ |
| set 0xdeadbeef, %g4 |
| set 0xdeadbeef, %g5 |
| set 0xdeadbeef, %g6 |
| |
| call init_irqwork_curcpu |
| nop |
| |
| sethi %hi(tlb_type), %g3 |
| lduw [%g3 + %lo(tlb_type)], %g2 |
| cmp %g2, 3 |
| bne,pt %icc, 1f |
| nop |
| |
| call hard_smp_processor_id |
| nop |
| |
| call sun4v_register_mondo_queues |
| nop |
| |
| 1: call init_cur_cpu_trap |
| ldx [%l0], %o0 |
| |
| /* Start using proper page size encodings in ctx register. */ |
| sethi %hi(sparc64_kern_pri_context), %g3 |
| ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 |
| mov PRIMARY_CONTEXT, %g1 |
| |
| 661: stxa %g2, [%g1] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g1] ASI_MMU |
| .previous |
| |
| membar #Sync |
| |
| wrpr %g0, 0, %wstate |
| |
| sethi %hi(prom_entry_lock), %g2 |
| 1: ldstub [%g2 + %lo(prom_entry_lock)], %g1 |
| brnz,pn %g1, 1b |
| nop |
| |
| /* As a hack, put &init_thread_union into %g6. |
| * prom_world() loads from here to restore the %asi |
| * register. |
| */ |
| sethi %hi(init_thread_union), %g6 |
| or %g6, %lo(init_thread_union), %g6 |
| |
| sethi %hi(is_sun4v), %o0 |
| lduw [%o0 + %lo(is_sun4v)], %o0 |
| brz,pt %o0, 2f |
| nop |
| |
| TRAP_LOAD_TRAP_BLOCK(%g2, %g3) |
| add %g2, TRAP_PER_CPU_FAULT_INFO, %g2 |
| stxa %g2, [%g0] ASI_SCRATCHPAD |
| |
| /* Compute physical address: |
| * |
| * paddr = kern_base + (mmfsa_vaddr - KERNBASE) |
| */ |
| sethi %hi(KERNBASE), %g3 |
| sub %g2, %g3, %g2 |
| sethi %hi(kern_base), %g3 |
| ldx [%g3 + %lo(kern_base)], %g3 |
| add %g2, %g3, %o1 |
| sethi %hi(sparc64_ttable_tl0), %o0 |
| |
| set prom_set_trap_table_name, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 2, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 0, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| stx %o0, [%sp + 2047 + 128 + 0x18] |
| stx %o1, [%sp + 2047 + 128 + 0x20] |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| ba,pt %xcc, 3f |
| nop |
| |
| 2: sethi %hi(sparc64_ttable_tl0), %o0 |
| set prom_set_trap_table_name, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 0, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| stx %o0, [%sp + 2047 + 128 + 0x18] |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| 3: sethi %hi(prom_entry_lock), %g2 |
| stb %g0, [%g2 + %lo(prom_entry_lock)] |
| |
| ldx [%l0], %g6 |
| ldx [%g6 + TI_TASK], %g4 |
| |
| mov 1, %g5 |
| sllx %g5, THREAD_SHIFT, %g5 |
| sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5 |
| add %g6, %g5, %sp |
| |
| rdpr %pstate, %o1 |
| or %o1, PSTATE_IE, %o1 |
| wrpr %o1, 0, %pstate |
| |
| call smp_callin |
| nop |
| |
| call cpu_panic |
| nop |
| 1: b,a,pt %xcc, 1b |
| |
| .align 8 |
| sparc64_cpu_startup_end: |
