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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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