mirror of
https://github.com/brain-hackers/linux-brain.git
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12efc91591
commit 0adb24e03a upstream.
The change to flush_kernel_vmap_range() wasn't sufficient to avoid the
SMP stalls. The problem is some drivers call these routines with
interrupts disabled. Interrupts need to be enabled for flush_tlb_all()
and flush_cache_all() to work. This version adds checks to ensure
interrupts are not disabled before calling routines that need IPI
interrupts. When interrupts are disabled, we now drop into slower code.
The attached change fixes the ordering of cache and TLB flushes in
several cases. When we flush the cache using the existing PTE/TLB
entries, we need to flush the TLB after doing the cache flush. We don't
need to do this when we flush the entire instruction and data caches as
these flushes don't use the existing TLB entries. The same is true for
tmpalias region flushes.
The flush_kernel_vmap_range() and invalidate_kernel_vmap_range()
routines have been updated.
Secondly, we added a new purge_kernel_dcache_range_asm() routine to
pacache.S and use it in invalidate_kernel_vmap_range(). Nominally,
purges are faster than flushes as the cache lines don't have to be
written back to memory.
Hopefully, this is sufficient to resolve the remaining problems due to
cache speculation. So far, testing indicates that this is the case. I
did work up a patch using tmpalias flushes, but there is a performance
hit because we need the physical address for each page, and we also need
to sequence access to the tmpalias flush code. This increases the
probability of stalls.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org # 4.9+
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1315 lines
30 KiB
ArmAsm
1315 lines
30 KiB
ArmAsm
/*
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* PARISC TLB and cache flushing support
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* Copyright (C) 2000-2001 Hewlett-Packard (John Marvin)
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* Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org)
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* Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* NOTE: fdc,fic, and pdc instructions that use base register modification
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* should only use index and base registers that are not shadowed,
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* so that the fast path emulation in the non access miss handler
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* can be used.
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*/
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#ifdef CONFIG_64BIT
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.level 2.0w
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#else
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.level 2.0
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#endif
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#include <asm/psw.h>
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#include <asm/assembly.h>
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#include <asm/pgtable.h>
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#include <asm/cache.h>
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#include <asm/ldcw.h>
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#include <linux/linkage.h>
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.text
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.align 128
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ENTRY_CFI(flush_tlb_all_local)
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.proc
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.callinfo NO_CALLS
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.entry
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/*
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* The pitlbe and pdtlbe instructions should only be used to
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* flush the entire tlb. Also, there needs to be no intervening
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* tlb operations, e.g. tlb misses, so the operation needs
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* to happen in real mode with all interruptions disabled.
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*/
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/* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
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rsm PSW_SM_I, %r19 /* save I-bit state */
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load32 PA(1f), %r1
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nop
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nop
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nop
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nop
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nop
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rsm PSW_SM_Q, %r0 /* prep to load iia queue */
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mtctl %r0, %cr17 /* Clear IIASQ tail */
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mtctl %r0, %cr17 /* Clear IIASQ head */
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mtctl %r1, %cr18 /* IIAOQ head */
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ldo 4(%r1), %r1
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mtctl %r1, %cr18 /* IIAOQ tail */
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load32 REAL_MODE_PSW, %r1
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mtctl %r1, %ipsw
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rfi
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nop
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1: load32 PA(cache_info), %r1
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/* Flush Instruction Tlb */
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LDREG ITLB_SID_BASE(%r1), %r20
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LDREG ITLB_SID_STRIDE(%r1), %r21
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LDREG ITLB_SID_COUNT(%r1), %r22
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LDREG ITLB_OFF_BASE(%r1), %arg0
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LDREG ITLB_OFF_STRIDE(%r1), %arg1
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LDREG ITLB_OFF_COUNT(%r1), %arg2
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LDREG ITLB_LOOP(%r1), %arg3
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addib,COND(=) -1, %arg3, fitoneloop /* Preadjust and test */
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movb,<,n %arg3, %r31, fitdone /* If loop < 0, skip */
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copy %arg0, %r28 /* Init base addr */
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fitmanyloop: /* Loop if LOOP >= 2 */
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mtsp %r20, %sr1
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add %r21, %r20, %r20 /* increment space */
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copy %arg2, %r29 /* Init middle loop count */
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fitmanymiddle: /* Loop if LOOP >= 2 */
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addib,COND(>) -1, %r31, fitmanymiddle /* Adjusted inner loop decr */
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pitlbe %r0(%sr1, %r28)
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pitlbe,m %arg1(%sr1, %r28) /* Last pitlbe and addr adjust */
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addib,COND(>) -1, %r29, fitmanymiddle /* Middle loop decr */
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copy %arg3, %r31 /* Re-init inner loop count */
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movb,tr %arg0, %r28, fitmanyloop /* Re-init base addr */
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addib,COND(<=),n -1, %r22, fitdone /* Outer loop count decr */
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fitoneloop: /* Loop if LOOP = 1 */
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mtsp %r20, %sr1
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copy %arg0, %r28 /* init base addr */
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copy %arg2, %r29 /* init middle loop count */
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fitonemiddle: /* Loop if LOOP = 1 */
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addib,COND(>) -1, %r29, fitonemiddle /* Middle loop count decr */
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pitlbe,m %arg1(%sr1, %r28) /* pitlbe for one loop */
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addib,COND(>) -1, %r22, fitoneloop /* Outer loop count decr */
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add %r21, %r20, %r20 /* increment space */
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fitdone:
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/* Flush Data Tlb */
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LDREG DTLB_SID_BASE(%r1), %r20
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LDREG DTLB_SID_STRIDE(%r1), %r21
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LDREG DTLB_SID_COUNT(%r1), %r22
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LDREG DTLB_OFF_BASE(%r1), %arg0
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LDREG DTLB_OFF_STRIDE(%r1), %arg1
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LDREG DTLB_OFF_COUNT(%r1), %arg2
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LDREG DTLB_LOOP(%r1), %arg3
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addib,COND(=) -1, %arg3, fdtoneloop /* Preadjust and test */
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movb,<,n %arg3, %r31, fdtdone /* If loop < 0, skip */
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copy %arg0, %r28 /* Init base addr */
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fdtmanyloop: /* Loop if LOOP >= 2 */
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mtsp %r20, %sr1
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add %r21, %r20, %r20 /* increment space */
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copy %arg2, %r29 /* Init middle loop count */
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fdtmanymiddle: /* Loop if LOOP >= 2 */
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addib,COND(>) -1, %r31, fdtmanymiddle /* Adjusted inner loop decr */
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pdtlbe %r0(%sr1, %r28)
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pdtlbe,m %arg1(%sr1, %r28) /* Last pdtlbe and addr adjust */
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addib,COND(>) -1, %r29, fdtmanymiddle /* Middle loop decr */
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copy %arg3, %r31 /* Re-init inner loop count */
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movb,tr %arg0, %r28, fdtmanyloop /* Re-init base addr */
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addib,COND(<=),n -1, %r22,fdtdone /* Outer loop count decr */
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fdtoneloop: /* Loop if LOOP = 1 */
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mtsp %r20, %sr1
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copy %arg0, %r28 /* init base addr */
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copy %arg2, %r29 /* init middle loop count */
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fdtonemiddle: /* Loop if LOOP = 1 */
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addib,COND(>) -1, %r29, fdtonemiddle /* Middle loop count decr */
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pdtlbe,m %arg1(%sr1, %r28) /* pdtlbe for one loop */
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addib,COND(>) -1, %r22, fdtoneloop /* Outer loop count decr */
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add %r21, %r20, %r20 /* increment space */
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fdtdone:
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/*
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* Switch back to virtual mode
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*/
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/* pcxt_ssm_bug */
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rsm PSW_SM_I, %r0
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load32 2f, %r1
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nop
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nop
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nop
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nop
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nop
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rsm PSW_SM_Q, %r0 /* prep to load iia queue */
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mtctl %r0, %cr17 /* Clear IIASQ tail */
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mtctl %r0, %cr17 /* Clear IIASQ head */
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mtctl %r1, %cr18 /* IIAOQ head */
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ldo 4(%r1), %r1
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mtctl %r1, %cr18 /* IIAOQ tail */
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load32 KERNEL_PSW, %r1
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or %r1, %r19, %r1 /* I-bit to state on entry */
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mtctl %r1, %ipsw /* restore I-bit (entire PSW) */
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rfi
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nop
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2: bv %r0(%r2)
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nop
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.exit
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.procend
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ENDPROC_CFI(flush_tlb_all_local)
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.import cache_info,data
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ENTRY_CFI(flush_instruction_cache_local)
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.proc
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.callinfo NO_CALLS
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.entry
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load32 cache_info, %r1
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/* Flush Instruction Cache */
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LDREG ICACHE_BASE(%r1), %arg0
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LDREG ICACHE_STRIDE(%r1), %arg1
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LDREG ICACHE_COUNT(%r1), %arg2
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LDREG ICACHE_LOOP(%r1), %arg3
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rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
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mtsp %r0, %sr1
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addib,COND(=) -1, %arg3, fioneloop /* Preadjust and test */
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movb,<,n %arg3, %r31, fisync /* If loop < 0, do sync */
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fimanyloop: /* Loop if LOOP >= 2 */
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addib,COND(>) -1, %r31, fimanyloop /* Adjusted inner loop decr */
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fice %r0(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0) /* Last fice and addr adjust */
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movb,tr %arg3, %r31, fimanyloop /* Re-init inner loop count */
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addib,COND(<=),n -1, %arg2, fisync /* Outer loop decr */
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fioneloop: /* Loop if LOOP = 1 */
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/* Some implementations may flush with a single fice instruction */
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cmpib,COND(>>=),n 15, %arg2, fioneloop2
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fioneloop1:
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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fice,m %arg1(%sr1, %arg0)
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addib,COND(>) -16, %arg2, fioneloop1
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fice,m %arg1(%sr1, %arg0)
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/* Check if done */
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cmpb,COND(=),n %arg2, %r0, fisync /* Predict branch taken */
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fioneloop2:
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addib,COND(>) -1, %arg2, fioneloop2 /* Outer loop count decr */
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fice,m %arg1(%sr1, %arg0) /* Fice for one loop */
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fisync:
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sync
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mtsm %r22 /* restore I-bit */
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bv %r0(%r2)
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nop
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.exit
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.procend
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ENDPROC_CFI(flush_instruction_cache_local)
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.import cache_info, data
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ENTRY_CFI(flush_data_cache_local)
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.proc
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.callinfo NO_CALLS
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.entry
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load32 cache_info, %r1
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/* Flush Data Cache */
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LDREG DCACHE_BASE(%r1), %arg0
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LDREG DCACHE_STRIDE(%r1), %arg1
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LDREG DCACHE_COUNT(%r1), %arg2
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LDREG DCACHE_LOOP(%r1), %arg3
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rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
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mtsp %r0, %sr1
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addib,COND(=) -1, %arg3, fdoneloop /* Preadjust and test */
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movb,<,n %arg3, %r31, fdsync /* If loop < 0, do sync */
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fdmanyloop: /* Loop if LOOP >= 2 */
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addib,COND(>) -1, %r31, fdmanyloop /* Adjusted inner loop decr */
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fdce %r0(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0) /* Last fdce and addr adjust */
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movb,tr %arg3, %r31, fdmanyloop /* Re-init inner loop count */
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addib,COND(<=),n -1, %arg2, fdsync /* Outer loop decr */
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fdoneloop: /* Loop if LOOP = 1 */
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/* Some implementations may flush with a single fdce instruction */
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cmpib,COND(>>=),n 15, %arg2, fdoneloop2
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fdoneloop1:
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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fdce,m %arg1(%sr1, %arg0)
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addib,COND(>) -16, %arg2, fdoneloop1
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fdce,m %arg1(%sr1, %arg0)
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/* Check if done */
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cmpb,COND(=),n %arg2, %r0, fdsync /* Predict branch taken */
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fdoneloop2:
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addib,COND(>) -1, %arg2, fdoneloop2 /* Outer loop count decr */
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fdce,m %arg1(%sr1, %arg0) /* Fdce for one loop */
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fdsync:
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syncdma
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sync
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mtsm %r22 /* restore I-bit */
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bv %r0(%r2)
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nop
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.exit
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.procend
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ENDPROC_CFI(flush_data_cache_local)
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.align 16
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/* Macros to serialize TLB purge operations on SMP. */
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.macro tlb_lock la,flags,tmp
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#ifdef CONFIG_SMP
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#if __PA_LDCW_ALIGNMENT > 4
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load32 pa_tlb_lock + __PA_LDCW_ALIGNMENT-1, \la
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depi 0,31,__PA_LDCW_ALIGN_ORDER, \la
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#else
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load32 pa_tlb_lock, \la
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#endif
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rsm PSW_SM_I,\flags
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1: LDCW 0(\la),\tmp
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cmpib,<>,n 0,\tmp,3f
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2: ldw 0(\la),\tmp
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cmpb,<> %r0,\tmp,1b
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nop
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b,n 2b
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3:
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#endif
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.endm
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.macro tlb_unlock la,flags,tmp
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#ifdef CONFIG_SMP
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ldi 1,\tmp
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stw \tmp,0(\la)
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mtsm \flags
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#endif
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.endm
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/* Clear page using kernel mapping. */
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ENTRY_CFI(clear_page_asm)
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.proc
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.callinfo NO_CALLS
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.entry
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#ifdef CONFIG_64BIT
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/* Unroll the loop. */
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ldi (PAGE_SIZE / 128), %r1
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1:
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std %r0, 0(%r26)
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std %r0, 8(%r26)
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std %r0, 16(%r26)
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std %r0, 24(%r26)
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std %r0, 32(%r26)
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std %r0, 40(%r26)
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std %r0, 48(%r26)
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std %r0, 56(%r26)
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std %r0, 64(%r26)
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std %r0, 72(%r26)
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std %r0, 80(%r26)
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std %r0, 88(%r26)
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std %r0, 96(%r26)
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std %r0, 104(%r26)
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std %r0, 112(%r26)
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std %r0, 120(%r26)
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/* Note reverse branch hint for addib is taken. */
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addib,COND(>),n -1, %r1, 1b
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ldo 128(%r26), %r26
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#else
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/*
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* Note that until (if) we start saving the full 64-bit register
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* values on interrupt, we can't use std on a 32 bit kernel.
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*/
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ldi (PAGE_SIZE / 64), %r1
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1:
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stw %r0, 0(%r26)
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stw %r0, 4(%r26)
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stw %r0, 8(%r26)
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stw %r0, 12(%r26)
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stw %r0, 16(%r26)
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stw %r0, 20(%r26)
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stw %r0, 24(%r26)
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stw %r0, 28(%r26)
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stw %r0, 32(%r26)
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stw %r0, 36(%r26)
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stw %r0, 40(%r26)
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stw %r0, 44(%r26)
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stw %r0, 48(%r26)
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stw %r0, 52(%r26)
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stw %r0, 56(%r26)
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stw %r0, 60(%r26)
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addib,COND(>),n -1, %r1, 1b
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ldo 64(%r26), %r26
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|
#endif
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bv %r0(%r2)
|
|
nop
|
|
.exit
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|
|
.procend
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ENDPROC_CFI(clear_page_asm)
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|
|
/* Copy page using kernel mapping. */
|
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|
|
ENTRY_CFI(copy_page_asm)
|
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.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
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|
|
#ifdef CONFIG_64BIT
|
|
/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
|
|
* Unroll the loop by hand and arrange insn appropriately.
|
|
* Prefetch doesn't improve performance on rp3440.
|
|
* GCC probably can do this just as well...
|
|
*/
|
|
|
|
ldi (PAGE_SIZE / 128), %r1
|
|
|
|
1: ldd 0(%r25), %r19
|
|
ldd 8(%r25), %r20
|
|
|
|
ldd 16(%r25), %r21
|
|
ldd 24(%r25), %r22
|
|
std %r19, 0(%r26)
|
|
std %r20, 8(%r26)
|
|
|
|
ldd 32(%r25), %r19
|
|
ldd 40(%r25), %r20
|
|
std %r21, 16(%r26)
|
|
std %r22, 24(%r26)
|
|
|
|
ldd 48(%r25), %r21
|
|
ldd 56(%r25), %r22
|
|
std %r19, 32(%r26)
|
|
std %r20, 40(%r26)
|
|
|
|
ldd 64(%r25), %r19
|
|
ldd 72(%r25), %r20
|
|
std %r21, 48(%r26)
|
|
std %r22, 56(%r26)
|
|
|
|
ldd 80(%r25), %r21
|
|
ldd 88(%r25), %r22
|
|
std %r19, 64(%r26)
|
|
std %r20, 72(%r26)
|
|
|
|
ldd 96(%r25), %r19
|
|
ldd 104(%r25), %r20
|
|
std %r21, 80(%r26)
|
|
std %r22, 88(%r26)
|
|
|
|
ldd 112(%r25), %r21
|
|
ldd 120(%r25), %r22
|
|
ldo 128(%r25), %r25
|
|
std %r19, 96(%r26)
|
|
std %r20, 104(%r26)
|
|
|
|
std %r21, 112(%r26)
|
|
std %r22, 120(%r26)
|
|
|
|
/* Note reverse branch hint for addib is taken. */
|
|
addib,COND(>),n -1, %r1, 1b
|
|
ldo 128(%r26), %r26
|
|
|
|
#else
|
|
|
|
/*
|
|
* This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
|
|
* bundles (very restricted rules for bundling).
|
|
* Note that until (if) we start saving
|
|
* the full 64 bit register values on interrupt, we can't
|
|
* use ldd/std on a 32 bit kernel.
|
|
*/
|
|
ldw 0(%r25), %r19
|
|
ldi (PAGE_SIZE / 64), %r1
|
|
|
|
1:
|
|
ldw 4(%r25), %r20
|
|
ldw 8(%r25), %r21
|
|
ldw 12(%r25), %r22
|
|
stw %r19, 0(%r26)
|
|
stw %r20, 4(%r26)
|
|
stw %r21, 8(%r26)
|
|
stw %r22, 12(%r26)
|
|
ldw 16(%r25), %r19
|
|
ldw 20(%r25), %r20
|
|
ldw 24(%r25), %r21
|
|
ldw 28(%r25), %r22
|
|
stw %r19, 16(%r26)
|
|
stw %r20, 20(%r26)
|
|
stw %r21, 24(%r26)
|
|
stw %r22, 28(%r26)
|
|
ldw 32(%r25), %r19
|
|
ldw 36(%r25), %r20
|
|
ldw 40(%r25), %r21
|
|
ldw 44(%r25), %r22
|
|
stw %r19, 32(%r26)
|
|
stw %r20, 36(%r26)
|
|
stw %r21, 40(%r26)
|
|
stw %r22, 44(%r26)
|
|
ldw 48(%r25), %r19
|
|
ldw 52(%r25), %r20
|
|
ldw 56(%r25), %r21
|
|
ldw 60(%r25), %r22
|
|
stw %r19, 48(%r26)
|
|
stw %r20, 52(%r26)
|
|
ldo 64(%r25), %r25
|
|
stw %r21, 56(%r26)
|
|
stw %r22, 60(%r26)
|
|
ldo 64(%r26), %r26
|
|
addib,COND(>),n -1, %r1, 1b
|
|
ldw 0(%r25), %r19
|
|
#endif
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(copy_page_asm)
|
|
|
|
/*
|
|
* NOTE: Code in clear_user_page has a hard coded dependency on the
|
|
* maximum alias boundary being 4 Mb. We've been assured by the
|
|
* parisc chip designers that there will not ever be a parisc
|
|
* chip with a larger alias boundary (Never say never :-) ).
|
|
*
|
|
* Subtle: the dtlb miss handlers support the temp alias region by
|
|
* "knowing" that if a dtlb miss happens within the temp alias
|
|
* region it must have occurred while in clear_user_page. Since
|
|
* this routine makes use of processor local translations, we
|
|
* don't want to insert them into the kernel page table. Instead,
|
|
* we load up some general registers (they need to be registers
|
|
* which aren't shadowed) with the physical page numbers (preshifted
|
|
* for tlb insertion) needed to insert the translations. When we
|
|
* miss on the translation, the dtlb miss handler inserts the
|
|
* translation into the tlb using these values:
|
|
*
|
|
* %r26 physical page (shifted for tlb insert) of "to" translation
|
|
* %r23 physical page (shifted for tlb insert) of "from" translation
|
|
*/
|
|
|
|
/* Drop prot bits and convert to page addr for iitlbt and idtlbt */
|
|
#define PAGE_ADD_SHIFT (PAGE_SHIFT-12)
|
|
.macro convert_phys_for_tlb_insert20 phys
|
|
extrd,u \phys, 56-PAGE_ADD_SHIFT, 32-PAGE_ADD_SHIFT, \phys
|
|
#if _PAGE_SIZE_ENCODING_DEFAULT
|
|
depdi _PAGE_SIZE_ENCODING_DEFAULT, 63, (63-58), \phys
|
|
#endif
|
|
.endm
|
|
|
|
/*
|
|
* copy_user_page_asm() performs a page copy using mappings
|
|
* equivalent to the user page mappings. It can be used to
|
|
* implement copy_user_page() but unfortunately both the `from'
|
|
* and `to' pages need to be flushed through mappings equivalent
|
|
* to the user mappings after the copy because the kernel accesses
|
|
* the `from' page through the kmap kernel mapping and the `to'
|
|
* page needs to be flushed since code can be copied. As a
|
|
* result, this implementation is less efficient than the simpler
|
|
* copy using the kernel mapping. It only needs the `from' page
|
|
* to flushed via the user mapping. The kunmap routines handle
|
|
* the flushes needed for the kernel mapping.
|
|
*
|
|
* I'm still keeping this around because it may be possible to
|
|
* use it if more information is passed into copy_user_page().
|
|
* Have to do some measurements to see if it is worthwhile to
|
|
* lobby for such a change.
|
|
*
|
|
*/
|
|
|
|
ENTRY_CFI(copy_user_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
/* Convert virtual `to' and `from' addresses to physical addresses.
|
|
Move `from' physical address to non shadowed register. */
|
|
ldil L%(__PAGE_OFFSET), %r1
|
|
sub %r26, %r1, %r26
|
|
sub %r25, %r1, %r23
|
|
|
|
ldil L%(TMPALIAS_MAP_START), %r28
|
|
#ifdef CONFIG_64BIT
|
|
#if (TMPALIAS_MAP_START >= 0x80000000)
|
|
depdi 0, 31,32, %r28 /* clear any sign extension */
|
|
#endif
|
|
convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
|
|
convert_phys_for_tlb_insert20 %r23 /* convert phys addr to tlb insert format */
|
|
depd %r24,63,22, %r28 /* Form aliased virtual address 'to' */
|
|
depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
copy %r28, %r29
|
|
depdi 1, 41,1, %r29 /* Form aliased virtual address 'from' */
|
|
#else
|
|
extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
|
|
extrw,u %r23, 24,25, %r23 /* convert phys addr to tlb insert format */
|
|
depw %r24, 31,22, %r28 /* Form aliased virtual address 'to' */
|
|
depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
copy %r28, %r29
|
|
depwi 1, 9,1, %r29 /* Form aliased virtual address 'from' */
|
|
#endif
|
|
|
|
/* Purge any old translations */
|
|
|
|
#ifdef CONFIG_PA20
|
|
pdtlb,l %r0(%r28)
|
|
pdtlb,l %r0(%r29)
|
|
#else
|
|
tlb_lock %r20,%r21,%r22
|
|
pdtlb %r0(%r28)
|
|
pdtlb %r0(%r29)
|
|
tlb_unlock %r20,%r21,%r22
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT
|
|
/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
|
|
* Unroll the loop by hand and arrange insn appropriately.
|
|
* GCC probably can do this just as well.
|
|
*/
|
|
|
|
ldd 0(%r29), %r19
|
|
ldi (PAGE_SIZE / 128), %r1
|
|
|
|
1: ldd 8(%r29), %r20
|
|
|
|
ldd 16(%r29), %r21
|
|
ldd 24(%r29), %r22
|
|
std %r19, 0(%r28)
|
|
std %r20, 8(%r28)
|
|
|
|
ldd 32(%r29), %r19
|
|
ldd 40(%r29), %r20
|
|
std %r21, 16(%r28)
|
|
std %r22, 24(%r28)
|
|
|
|
ldd 48(%r29), %r21
|
|
ldd 56(%r29), %r22
|
|
std %r19, 32(%r28)
|
|
std %r20, 40(%r28)
|
|
|
|
ldd 64(%r29), %r19
|
|
ldd 72(%r29), %r20
|
|
std %r21, 48(%r28)
|
|
std %r22, 56(%r28)
|
|
|
|
ldd 80(%r29), %r21
|
|
ldd 88(%r29), %r22
|
|
std %r19, 64(%r28)
|
|
std %r20, 72(%r28)
|
|
|
|
ldd 96(%r29), %r19
|
|
ldd 104(%r29), %r20
|
|
std %r21, 80(%r28)
|
|
std %r22, 88(%r28)
|
|
|
|
ldd 112(%r29), %r21
|
|
ldd 120(%r29), %r22
|
|
std %r19, 96(%r28)
|
|
std %r20, 104(%r28)
|
|
|
|
ldo 128(%r29), %r29
|
|
std %r21, 112(%r28)
|
|
std %r22, 120(%r28)
|
|
ldo 128(%r28), %r28
|
|
|
|
/* conditional branches nullify on forward taken branch, and on
|
|
* non-taken backward branch. Note that .+4 is a backwards branch.
|
|
* The ldd should only get executed if the branch is taken.
|
|
*/
|
|
addib,COND(>),n -1, %r1, 1b /* bundle 10 */
|
|
ldd 0(%r29), %r19 /* start next loads */
|
|
|
|
#else
|
|
ldi (PAGE_SIZE / 64), %r1
|
|
|
|
/*
|
|
* This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
|
|
* bundles (very restricted rules for bundling). It probably
|
|
* does OK on PCXU and better, but we could do better with
|
|
* ldd/std instructions. Note that until (if) we start saving
|
|
* the full 64 bit register values on interrupt, we can't
|
|
* use ldd/std on a 32 bit kernel.
|
|
*/
|
|
|
|
1: ldw 0(%r29), %r19
|
|
ldw 4(%r29), %r20
|
|
ldw 8(%r29), %r21
|
|
ldw 12(%r29), %r22
|
|
stw %r19, 0(%r28)
|
|
stw %r20, 4(%r28)
|
|
stw %r21, 8(%r28)
|
|
stw %r22, 12(%r28)
|
|
ldw 16(%r29), %r19
|
|
ldw 20(%r29), %r20
|
|
ldw 24(%r29), %r21
|
|
ldw 28(%r29), %r22
|
|
stw %r19, 16(%r28)
|
|
stw %r20, 20(%r28)
|
|
stw %r21, 24(%r28)
|
|
stw %r22, 28(%r28)
|
|
ldw 32(%r29), %r19
|
|
ldw 36(%r29), %r20
|
|
ldw 40(%r29), %r21
|
|
ldw 44(%r29), %r22
|
|
stw %r19, 32(%r28)
|
|
stw %r20, 36(%r28)
|
|
stw %r21, 40(%r28)
|
|
stw %r22, 44(%r28)
|
|
ldw 48(%r29), %r19
|
|
ldw 52(%r29), %r20
|
|
ldw 56(%r29), %r21
|
|
ldw 60(%r29), %r22
|
|
stw %r19, 48(%r28)
|
|
stw %r20, 52(%r28)
|
|
stw %r21, 56(%r28)
|
|
stw %r22, 60(%r28)
|
|
ldo 64(%r28), %r28
|
|
|
|
addib,COND(>) -1, %r1,1b
|
|
ldo 64(%r29), %r29
|
|
#endif
|
|
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(copy_user_page_asm)
|
|
|
|
ENTRY_CFI(clear_user_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
tophys_r1 %r26
|
|
|
|
ldil L%(TMPALIAS_MAP_START), %r28
|
|
#ifdef CONFIG_64BIT
|
|
#if (TMPALIAS_MAP_START >= 0x80000000)
|
|
depdi 0, 31,32, %r28 /* clear any sign extension */
|
|
#endif
|
|
convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
|
|
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
|
|
depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#else
|
|
extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
|
|
depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
|
|
depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#endif
|
|
|
|
/* Purge any old translation */
|
|
|
|
#ifdef CONFIG_PA20
|
|
pdtlb,l %r0(%r28)
|
|
#else
|
|
tlb_lock %r20,%r21,%r22
|
|
pdtlb %r0(%r28)
|
|
tlb_unlock %r20,%r21,%r22
|
|
#endif
|
|
|
|
#ifdef CONFIG_64BIT
|
|
ldi (PAGE_SIZE / 128), %r1
|
|
|
|
/* PREFETCH (Write) has not (yet) been proven to help here */
|
|
/* #define PREFETCHW_OP ldd 256(%0), %r0 */
|
|
|
|
1: std %r0, 0(%r28)
|
|
std %r0, 8(%r28)
|
|
std %r0, 16(%r28)
|
|
std %r0, 24(%r28)
|
|
std %r0, 32(%r28)
|
|
std %r0, 40(%r28)
|
|
std %r0, 48(%r28)
|
|
std %r0, 56(%r28)
|
|
std %r0, 64(%r28)
|
|
std %r0, 72(%r28)
|
|
std %r0, 80(%r28)
|
|
std %r0, 88(%r28)
|
|
std %r0, 96(%r28)
|
|
std %r0, 104(%r28)
|
|
std %r0, 112(%r28)
|
|
std %r0, 120(%r28)
|
|
addib,COND(>) -1, %r1, 1b
|
|
ldo 128(%r28), %r28
|
|
|
|
#else /* ! CONFIG_64BIT */
|
|
ldi (PAGE_SIZE / 64), %r1
|
|
|
|
1: stw %r0, 0(%r28)
|
|
stw %r0, 4(%r28)
|
|
stw %r0, 8(%r28)
|
|
stw %r0, 12(%r28)
|
|
stw %r0, 16(%r28)
|
|
stw %r0, 20(%r28)
|
|
stw %r0, 24(%r28)
|
|
stw %r0, 28(%r28)
|
|
stw %r0, 32(%r28)
|
|
stw %r0, 36(%r28)
|
|
stw %r0, 40(%r28)
|
|
stw %r0, 44(%r28)
|
|
stw %r0, 48(%r28)
|
|
stw %r0, 52(%r28)
|
|
stw %r0, 56(%r28)
|
|
stw %r0, 60(%r28)
|
|
addib,COND(>) -1, %r1, 1b
|
|
ldo 64(%r28), %r28
|
|
#endif /* CONFIG_64BIT */
|
|
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(clear_user_page_asm)
|
|
|
|
ENTRY_CFI(flush_dcache_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%(TMPALIAS_MAP_START), %r28
|
|
#ifdef CONFIG_64BIT
|
|
#if (TMPALIAS_MAP_START >= 0x80000000)
|
|
depdi 0, 31,32, %r28 /* clear any sign extension */
|
|
#endif
|
|
convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
|
|
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
|
|
depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#else
|
|
extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
|
|
depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
|
|
depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#endif
|
|
|
|
/* Purge any old translation */
|
|
|
|
#ifdef CONFIG_PA20
|
|
pdtlb,l %r0(%r28)
|
|
#else
|
|
tlb_lock %r20,%r21,%r22
|
|
pdtlb %r0(%r28)
|
|
tlb_unlock %r20,%r21,%r22
|
|
#endif
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), r31
|
|
|
|
#ifdef CONFIG_64BIT
|
|
depdi,z 1, 63-PAGE_SHIFT,1, %r25
|
|
#else
|
|
depwi,z 1, 31-PAGE_SHIFT,1, %r25
|
|
#endif
|
|
add %r28, %r25, %r25
|
|
sub %r25, r31, %r25
|
|
|
|
|
|
1: fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
fdc,m r31(%r28)
|
|
cmpb,COND(<<) %r28, %r25,1b
|
|
fdc,m r31(%r28)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_dcache_page_asm)
|
|
|
|
ENTRY_CFI(flush_icache_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%(TMPALIAS_MAP_START), %r28
|
|
#ifdef CONFIG_64BIT
|
|
#if (TMPALIAS_MAP_START >= 0x80000000)
|
|
depdi 0, 31,32, %r28 /* clear any sign extension */
|
|
#endif
|
|
convert_phys_for_tlb_insert20 %r26 /* convert phys addr to tlb insert format */
|
|
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
|
|
depdi 0, 63,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#else
|
|
extrw,u %r26, 24,25, %r26 /* convert phys addr to tlb insert format */
|
|
depw %r25, 31,22, %r28 /* Form aliased virtual address 'to' */
|
|
depwi 0, 31,PAGE_SHIFT, %r28 /* Clear any offset bits */
|
|
#endif
|
|
|
|
/* Purge any old translation. Note that the FIC instruction
|
|
* may use either the instruction or data TLB. Given that we
|
|
* have a flat address space, it's not clear which TLB will be
|
|
* used. So, we purge both entries. */
|
|
|
|
#ifdef CONFIG_PA20
|
|
pdtlb,l %r0(%r28)
|
|
pitlb,l %r0(%sr4,%r28)
|
|
#else
|
|
tlb_lock %r20,%r21,%r22
|
|
pdtlb %r0(%r28)
|
|
pitlb %r0(%sr4,%r28)
|
|
tlb_unlock %r20,%r21,%r22
|
|
#endif
|
|
|
|
ldil L%icache_stride, %r1
|
|
ldw R%icache_stride(%r1), %r31
|
|
|
|
#ifdef CONFIG_64BIT
|
|
depdi,z 1, 63-PAGE_SHIFT,1, %r25
|
|
#else
|
|
depwi,z 1, 31-PAGE_SHIFT,1, %r25
|
|
#endif
|
|
add %r28, %r25, %r25
|
|
sub %r25, %r31, %r25
|
|
|
|
|
|
/* fic only has the type 26 form on PA1.1, requiring an
|
|
* explicit space specification, so use %sr4 */
|
|
1: fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
fic,m %r31(%sr4,%r28)
|
|
cmpb,COND(<<) %r28, %r25,1b
|
|
fic,m %r31(%sr4,%r28)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_icache_page_asm)
|
|
|
|
ENTRY_CFI(flush_kernel_dcache_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), %r23
|
|
|
|
#ifdef CONFIG_64BIT
|
|
depdi,z 1, 63-PAGE_SHIFT,1, %r25
|
|
#else
|
|
depwi,z 1, 31-PAGE_SHIFT,1, %r25
|
|
#endif
|
|
add %r26, %r25, %r25
|
|
sub %r25, %r23, %r25
|
|
|
|
|
|
1: fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
fdc,m %r23(%r26)
|
|
cmpb,COND(<<) %r26, %r25,1b
|
|
fdc,m %r23(%r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_kernel_dcache_page_asm)
|
|
|
|
ENTRY_CFI(purge_kernel_dcache_page_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), %r23
|
|
|
|
#ifdef CONFIG_64BIT
|
|
depdi,z 1, 63-PAGE_SHIFT,1, %r25
|
|
#else
|
|
depwi,z 1, 31-PAGE_SHIFT,1, %r25
|
|
#endif
|
|
add %r26, %r25, %r25
|
|
sub %r25, %r23, %r25
|
|
|
|
1: pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
pdc,m %r23(%r26)
|
|
cmpb,COND(<<) %r26, %r25, 1b
|
|
pdc,m %r23(%r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(purge_kernel_dcache_page_asm)
|
|
|
|
ENTRY_CFI(flush_user_dcache_range_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), %r23
|
|
ldo -1(%r23), %r21
|
|
ANDCM %r26, %r21, %r26
|
|
|
|
1: cmpb,COND(<<),n %r26, %r25, 1b
|
|
fdc,m %r23(%sr3, %r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_user_dcache_range_asm)
|
|
|
|
ENTRY_CFI(flush_kernel_dcache_range_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), %r23
|
|
ldo -1(%r23), %r21
|
|
ANDCM %r26, %r21, %r26
|
|
|
|
1: cmpb,COND(<<),n %r26, %r25,1b
|
|
fdc,m %r23(%r26)
|
|
|
|
sync
|
|
syncdma
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_kernel_dcache_range_asm)
|
|
|
|
ENTRY_CFI(purge_kernel_dcache_range_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%dcache_stride, %r1
|
|
ldw R%dcache_stride(%r1), %r23
|
|
ldo -1(%r23), %r21
|
|
ANDCM %r26, %r21, %r26
|
|
|
|
1: cmpb,COND(<<),n %r26, %r25,1b
|
|
pdc,m %r23(%r26)
|
|
|
|
sync
|
|
syncdma
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(purge_kernel_dcache_range_asm)
|
|
|
|
ENTRY_CFI(flush_user_icache_range_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%icache_stride, %r1
|
|
ldw R%icache_stride(%r1), %r23
|
|
ldo -1(%r23), %r21
|
|
ANDCM %r26, %r21, %r26
|
|
|
|
1: cmpb,COND(<<),n %r26, %r25,1b
|
|
fic,m %r23(%sr3, %r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_user_icache_range_asm)
|
|
|
|
ENTRY_CFI(flush_kernel_icache_page)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%icache_stride, %r1
|
|
ldw R%icache_stride(%r1), %r23
|
|
|
|
#ifdef CONFIG_64BIT
|
|
depdi,z 1, 63-PAGE_SHIFT,1, %r25
|
|
#else
|
|
depwi,z 1, 31-PAGE_SHIFT,1, %r25
|
|
#endif
|
|
add %r26, %r25, %r25
|
|
sub %r25, %r23, %r25
|
|
|
|
|
|
1: fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
fic,m %r23(%sr4, %r26)
|
|
cmpb,COND(<<) %r26, %r25, 1b
|
|
fic,m %r23(%sr4, %r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(flush_kernel_icache_page)
|
|
|
|
ENTRY_CFI(flush_kernel_icache_range_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
ldil L%icache_stride, %r1
|
|
ldw R%icache_stride(%r1), %r23
|
|
ldo -1(%r23), %r21
|
|
ANDCM %r26, %r21, %r26
|
|
|
|
1: cmpb,COND(<<),n %r26, %r25, 1b
|
|
fic,m %r23(%sr4, %r26)
|
|
|
|
sync
|
|
bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
.procend
|
|
ENDPROC_CFI(flush_kernel_icache_range_asm)
|
|
|
|
/* align should cover use of rfi in disable_sr_hashing_asm and
|
|
* srdis_done.
|
|
*/
|
|
.align 256
|
|
ENTRY_CFI(disable_sr_hashing_asm)
|
|
.proc
|
|
.callinfo NO_CALLS
|
|
.entry
|
|
|
|
/*
|
|
* Switch to real mode
|
|
*/
|
|
/* pcxt_ssm_bug */
|
|
rsm PSW_SM_I, %r0
|
|
load32 PA(1f), %r1
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
rsm PSW_SM_Q, %r0 /* prep to load iia queue */
|
|
mtctl %r0, %cr17 /* Clear IIASQ tail */
|
|
mtctl %r0, %cr17 /* Clear IIASQ head */
|
|
mtctl %r1, %cr18 /* IIAOQ head */
|
|
ldo 4(%r1), %r1
|
|
mtctl %r1, %cr18 /* IIAOQ tail */
|
|
load32 REAL_MODE_PSW, %r1
|
|
mtctl %r1, %ipsw
|
|
rfi
|
|
nop
|
|
|
|
1: cmpib,=,n SRHASH_PCXST, %r26,srdis_pcxs
|
|
cmpib,=,n SRHASH_PCXL, %r26,srdis_pcxl
|
|
cmpib,=,n SRHASH_PA20, %r26,srdis_pa20
|
|
b,n srdis_done
|
|
|
|
srdis_pcxs:
|
|
|
|
/* Disable Space Register Hashing for PCXS,PCXT,PCXT' */
|
|
|
|
.word 0x141c1a00 /* mfdiag %dr0, %r28 */
|
|
.word 0x141c1a00 /* must issue twice */
|
|
depwi 0,18,1, %r28 /* Clear DHE (dcache hash enable) */
|
|
depwi 0,20,1, %r28 /* Clear IHE (icache hash enable) */
|
|
.word 0x141c1600 /* mtdiag %r28, %dr0 */
|
|
.word 0x141c1600 /* must issue twice */
|
|
b,n srdis_done
|
|
|
|
srdis_pcxl:
|
|
|
|
/* Disable Space Register Hashing for PCXL */
|
|
|
|
.word 0x141c0600 /* mfdiag %dr0, %r28 */
|
|
depwi 0,28,2, %r28 /* Clear DHASH_EN & IHASH_EN */
|
|
.word 0x141c0240 /* mtdiag %r28, %dr0 */
|
|
b,n srdis_done
|
|
|
|
srdis_pa20:
|
|
|
|
/* Disable Space Register Hashing for PCXU,PCXU+,PCXW,PCXW+,PCXW2 */
|
|
|
|
.word 0x144008bc /* mfdiag %dr2, %r28 */
|
|
depdi 0, 54,1, %r28 /* clear DIAG_SPHASH_ENAB (bit 54) */
|
|
.word 0x145c1840 /* mtdiag %r28, %dr2 */
|
|
|
|
|
|
srdis_done:
|
|
/* Switch back to virtual mode */
|
|
rsm PSW_SM_I, %r0 /* prep to load iia queue */
|
|
load32 2f, %r1
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
nop
|
|
|
|
rsm PSW_SM_Q, %r0 /* prep to load iia queue */
|
|
mtctl %r0, %cr17 /* Clear IIASQ tail */
|
|
mtctl %r0, %cr17 /* Clear IIASQ head */
|
|
mtctl %r1, %cr18 /* IIAOQ head */
|
|
ldo 4(%r1), %r1
|
|
mtctl %r1, %cr18 /* IIAOQ tail */
|
|
load32 KERNEL_PSW, %r1
|
|
mtctl %r1, %ipsw
|
|
rfi
|
|
nop
|
|
|
|
2: bv %r0(%r2)
|
|
nop
|
|
.exit
|
|
|
|
.procend
|
|
ENDPROC_CFI(disable_sr_hashing_asm)
|
|
|
|
.end
|