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-rw-r--r--arch/tile/mm/migrate_64.S167
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diff --git a/arch/tile/mm/migrate_64.S b/arch/tile/mm/migrate_64.S
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--- a/arch/tile/mm/migrate_64.S
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-/*
- * Copyright 2011 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- *
- * This routine is a helper for migrating the home of a set of pages to
- * a new cpu. See the documentation in homecache.c for more information.
- */
-
-#include <linux/linkage.h>
-#include <linux/threads.h>
-#include <asm/page.h>
-#include <asm/thread_info.h>
-#include <asm/types.h>
-#include <asm/asm-offsets.h>
-#include <hv/hypervisor.h>
-
- .text
-
-/*
- * First, some definitions that apply to all the code in the file.
- */
-
-/* Locals (caller-save) */
-#define r_tmp r10
-#define r_save_sp r11
-
-/* What we save where in the stack frame; must include all callee-saves. */
-#define FRAME_SP 8
-#define FRAME_R30 16
-#define FRAME_R31 24
-#define FRAME_R32 32
-#define FRAME_SIZE 40
-
-
-
-
-/*
- * On entry:
- *
- * r0 the new context PA to install (moved to r_context)
- * r1 PTE to use for context access (moved to r_access)
- * r2 ASID to use for new context (moved to r_asid)
- * r3 pointer to cpumask with just this cpu set in it (r_my_cpumask)
- */
-
-/* Arguments (caller-save) */
-#define r_context_in r0
-#define r_access_in r1
-#define r_asid_in r2
-#define r_my_cpumask r3
-
-/* Locals (callee-save); must not be more than FRAME_xxx above. */
-#define r_context r30
-#define r_access r31
-#define r_asid r32
-
-/*
- * Caller-save locals and frame constants are the same as
- * for homecache_migrate_stack_and_flush.
- */
-
-STD_ENTRY(flush_and_install_context)
- /*
- * Create a stack frame; we can't touch it once we flush the
- * cache until we install the new page table and flush the TLB.
- */
- {
- move r_save_sp, sp
- st sp, lr
- addi sp, sp, -FRAME_SIZE
- }
- addi r_tmp, sp, FRAME_SP
- {
- st r_tmp, r_save_sp
- addi r_tmp, sp, FRAME_R30
- }
- {
- st r_tmp, r30
- addi r_tmp, sp, FRAME_R31
- }
- {
- st r_tmp, r31
- addi r_tmp, sp, FRAME_R32
- }
- st r_tmp, r32
-
- /* Move some arguments to callee-save registers. */
- {
- move r_context, r_context_in
- move r_access, r_access_in
- }
- move r_asid, r_asid_in
-
- /* First, flush our L2 cache. */
- {
- move r0, zero /* cache_pa */
- moveli r1, hw2_last(HV_FLUSH_EVICT_L2) /* cache_control */
- }
- {
- shl16insli r1, r1, hw1(HV_FLUSH_EVICT_L2)
- move r2, r_my_cpumask /* cache_cpumask */
- }
- {
- shl16insli r1, r1, hw0(HV_FLUSH_EVICT_L2)
- move r3, zero /* tlb_va */
- }
- {
- move r4, zero /* tlb_length */
- move r5, zero /* tlb_pgsize */
- }
- {
- move r6, zero /* tlb_cpumask */
- move r7, zero /* asids */
- }
- {
- move r8, zero /* asidcount */
- jal _hv_flush_remote
- }
- bnez r0, 1f
-
- /* Now install the new page table. */
- {
- move r0, r_context
- move r1, r_access
- }
- {
- move r2, r_asid
- moveli r3, HV_CTX_DIRECTIO | CTX_PAGE_FLAG
- }
- jal _hv_install_context
- bnez r0, 1f
-
- /* Finally, flush the TLB. */
- {
- movei r0, 0 /* preserve_global */
- jal hv_flush_all
- }
-
-1: /* Restore the callee-saved registers and return. */
- addli lr, sp, FRAME_SIZE
- {
- ld lr, lr
- addli r_tmp, sp, FRAME_R30
- }
- {
- ld r30, r_tmp
- addli r_tmp, sp, FRAME_R31
- }
- {
- ld r31, r_tmp
- addli r_tmp, sp, FRAME_R32
- }
- {
- ld r32, r_tmp
- addi sp, sp, FRAME_SIZE
- }
- jrp lr
- STD_ENDPROC(flush_and_install_context)