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-rw-r--r--sys/powerpc/booke/support.S106
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-/*-
- * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#include "assym.s"
-
-#include <machine/param.h>
-#include <machine/asm.h>
-#include <machine/spr.h>
-#include <machine/psl.h>
-#include <machine/pte.h>
-#include <machine/trap.h>
-#include <machine/vmparam.h>
-#include <machine/tlb.h>
-
- .text
-/*
- * void remap_ccsrbar(vm_offset_t old_ccsrbar_va, vm_offset_t new_ccsrbar_va,
- * vm_offset_t new_ccsrbar_pa)
- *
- * r3 - old_ccsrbar_va
- * r4 - new_ccsrbar_va
- * r5 - new_ccsrbar_pa
- */
-ENTRY(remap_ccsrbar)
- /*
- * CCSRBAR updating sequence according
- * to section 4.3.1.1.1 of MPC8555E RM.
- */
-
- /* Read current value of CCSRBAR */
- lwz %r6, 0(%r3)
- isync
-
- /* Write new value */
- rlwinm %r6, %r5, 20, 12, 23
- stw %r6, 0(%r3)
-
- /*
- * Read from address that is outside of CCSRBAR space.
- * We have RAM locations available at KERNBASE.
- */
- lis %r7, KERNBASE@ha
- addi %r7, %r7, KERNBASE@l
- lwz %r6, 0(%r7)
- isync
-
- /* Read value of CCSRBAR from new location */
- lwz %r6, 0(%r4)
- isync
- blr
-
-/*
- * void switch_to_as0(void)
- */
-ENTRY(switch_to_as0)
- mflr %r5 /* Save LR */
-
- mfmsr %r3
- lis %r6, (PSL_IS | PSL_DS)@ha
- ori %r6, %r6, (PSL_IS | PSL_DS)@l
- not %r6, %r6
- and %r3, %r3, %r6 /* Clear IS/DS bits */
-
- bl 1f
-1: mflr %r4 /* Use current address */
- addi %r4, %r4, 20 /* Increment to instruction after rfi */
- mtspr SPR_SRR0, %r4
- mtspr SPR_SRR1, %r3
- rfi
-
- mtlr %r5 /* Restore LR */
- blr
-
-/*
- * void load_pid0(tlbtid_t)
- */
-ENTRY(load_pid0)
- mtspr SPR_PID0, %r3
- isync
- blr
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