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linux/arch/parisc/kernel/pacache.S
Helge Deller 2fd8303816 [PARISC] Further work for multiple page sizes 
More work towards supporing multiple page sizes on 64-bit. Convert
some assumptions that 64bit uses 3 level page tables into testing
PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups
to assembler.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2006-04-21 22:20:34 +00:00

1094 lines
24 KiB
ArmAsm
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/*
* PARISC TLB and cache flushing support
* Copyright (C) 2000-2001 Hewlett-Packard (John Marvin)
* Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org)
* Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org)
*
* 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; either version 2, or (at your option)
* any later version.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* NOTE: fdc,fic, and pdc instructions that use base register modification
* should only use index and base registers that are not shadowed,
* so that the fast path emulation in the non access miss handler
* can be used.
*/
#ifdef CONFIG_64BIT
#define ADDIB addib,*
#define CMPB cmpb,*
#define ANDCM andcm,*
.level 2.0w
#else
#define ADDIB addib,
#define CMPB cmpb,
#define ANDCM andcm
.level 2.0
#endif
#include <linux/config.h>
#include <asm/psw.h>
#include <asm/assembly.h>
#include <asm/pgtable.h>
#include <asm/cache.h>
.text
.align 128
.export flush_tlb_all_local,code
flush_tlb_all_local:
.proc
.callinfo NO_CALLS
.entry
/*
* The pitlbe and pdtlbe instructions should only be used to
* flush the entire tlb. Also, there needs to be no intervening
* tlb operations, e.g. tlb misses, so the operation needs
* to happen in real mode with all interruptions disabled.
*/
/* pcxt_ssm_bug - relied upon translation! PA 2.0 Arch. F-4 and F-5 */
rsm PSW_SM_I, %r19 /* save I-bit state */
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: load32 PA(cache_info), %r1
/* Flush Instruction Tlb */
LDREG ITLB_SID_BASE(%r1), %r20
LDREG ITLB_SID_STRIDE(%r1), %r21
LDREG ITLB_SID_COUNT(%r1), %r22
LDREG ITLB_OFF_BASE(%r1), %arg0
LDREG ITLB_OFF_STRIDE(%r1), %arg1
LDREG ITLB_OFF_COUNT(%r1), %arg2
LDREG ITLB_LOOP(%r1), %arg3
ADDIB= -1, %arg3, fitoneloop /* Preadjust and test */
movb,<,n %arg3, %r31, fitdone /* If loop < 0, skip */
copy %arg0, %r28 /* Init base addr */
fitmanyloop: /* Loop if LOOP >= 2 */
mtsp %r20, %sr1
add %r21, %r20, %r20 /* increment space */
copy %arg2, %r29 /* Init middle loop count */
fitmanymiddle: /* Loop if LOOP >= 2 */
ADDIB> -1, %r31, fitmanymiddle /* Adjusted inner loop decr */
pitlbe 0(%sr1, %r28)
pitlbe,m %arg1(%sr1, %r28) /* Last pitlbe and addr adjust */
ADDIB> -1, %r29, fitmanymiddle /* Middle loop decr */
copy %arg3, %r31 /* Re-init inner loop count */
movb,tr %arg0, %r28, fitmanyloop /* Re-init base addr */
ADDIB<=,n -1, %r22, fitdone /* Outer loop count decr */
fitoneloop: /* Loop if LOOP = 1 */
mtsp %r20, %sr1
copy %arg0, %r28 /* init base addr */
copy %arg2, %r29 /* init middle loop count */
fitonemiddle: /* Loop if LOOP = 1 */
ADDIB> -1, %r29, fitonemiddle /* Middle loop count decr */
pitlbe,m %arg1(%sr1, %r28) /* pitlbe for one loop */
ADDIB> -1, %r22, fitoneloop /* Outer loop count decr */
add %r21, %r20, %r20 /* increment space */
fitdone:
/* Flush Data Tlb */
LDREG DTLB_SID_BASE(%r1), %r20
LDREG DTLB_SID_STRIDE(%r1), %r21
LDREG DTLB_SID_COUNT(%r1), %r22
LDREG DTLB_OFF_BASE(%r1), %arg0
LDREG DTLB_OFF_STRIDE(%r1), %arg1
LDREG DTLB_OFF_COUNT(%r1), %arg2
LDREG DTLB_LOOP(%r1), %arg3
ADDIB= -1, %arg3, fdtoneloop /* Preadjust and test */
movb,<,n %arg3, %r31, fdtdone /* If loop < 0, skip */
copy %arg0, %r28 /* Init base addr */
fdtmanyloop: /* Loop if LOOP >= 2 */
mtsp %r20, %sr1
add %r21, %r20, %r20 /* increment space */
copy %arg2, %r29 /* Init middle loop count */
fdtmanymiddle: /* Loop if LOOP >= 2 */
ADDIB> -1, %r31, fdtmanymiddle /* Adjusted inner loop decr */
pdtlbe 0(%sr1, %r28)
pdtlbe,m %arg1(%sr1, %r28) /* Last pdtlbe and addr adjust */
ADDIB> -1, %r29, fdtmanymiddle /* Middle loop decr */
copy %arg3, %r31 /* Re-init inner loop count */
movb,tr %arg0, %r28, fdtmanyloop /* Re-init base addr */
ADDIB<=,n -1, %r22,fdtdone /* Outer loop count decr */
fdtoneloop: /* Loop if LOOP = 1 */
mtsp %r20, %sr1
copy %arg0, %r28 /* init base addr */
copy %arg2, %r29 /* init middle loop count */
fdtonemiddle: /* Loop if LOOP = 1 */
ADDIB> -1, %r29, fdtonemiddle /* Middle loop count decr */
pdtlbe,m %arg1(%sr1, %r28) /* pdtlbe for one loop */
ADDIB> -1, %r22, fdtoneloop /* Outer loop count decr */
add %r21, %r20, %r20 /* increment space */
fdtdone:
/*
* Switch back to virtual mode
*/
/* pcxt_ssm_bug */
rsm PSW_SM_I, %r0
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
or %r1, %r19, %r1 /* I-bit to state on entry */
mtctl %r1, %ipsw /* restore I-bit (entire PSW) */
rfi
nop
2: bv %r0(%r2)
nop
.exit
.procend
.export flush_instruction_cache_local,code
.import cache_info,data
flush_instruction_cache_local:
.proc
.callinfo NO_CALLS
.entry
mtsp %r0, %sr1
load32 cache_info, %r1
/* Flush Instruction Cache */
LDREG ICACHE_BASE(%r1), %arg0
LDREG ICACHE_STRIDE(%r1), %arg1
LDREG ICACHE_COUNT(%r1), %arg2
LDREG ICACHE_LOOP(%r1), %arg3
rsm PSW_SM_I, %r22 /* No mmgt ops during loop*/
ADDIB= -1, %arg3, fioneloop /* Preadjust and test */
movb,<,n %arg3, %r31, fisync /* If loop < 0, do sync */
fimanyloop: /* Loop if LOOP >= 2 */
ADDIB> -1, %r31, fimanyloop /* Adjusted inner loop decr */
fice %r0(%sr1, %arg0)
fice,m %arg1(%sr1, %arg0) /* Last fice and addr adjust */
movb,tr %arg3, %r31, fimanyloop /* Re-init inner loop count */
ADDIB<=,n -1, %arg2, fisync /* Outer loop decr */
fioneloop: /* Loop if LOOP = 1 */
ADDIB> -1, %arg2, fioneloop /* Outer loop count decr */
fice,m %arg1(%sr1, %arg0) /* Fice for one loop */
fisync:
sync
mtsm %r22 /* restore I-bit */
bv %r0(%r2)
nop
.exit
.procend
.export flush_data_cache_local, code
.import cache_info, data
flush_data_cache_local:
.proc
.callinfo NO_CALLS
.entry
mtsp %r0, %sr1
load32 cache_info, %r1
/* Flush Data Cache */
LDREG DCACHE_BASE(%r1), %arg0
LDREG DCACHE_STRIDE(%r1), %arg1
LDREG DCACHE_COUNT(%r1), %arg2
LDREG DCACHE_LOOP(%r1), %arg3
rsm PSW_SM_I, %r22
ADDIB= -1, %arg3, fdoneloop /* Preadjust and test */
movb,<,n %arg3, %r31, fdsync /* If loop < 0, do sync */
fdmanyloop: /* Loop if LOOP >= 2 */
ADDIB> -1, %r31, fdmanyloop /* Adjusted inner loop decr */
fdce %r0(%sr1, %arg0)
fdce,m %arg1(%sr1, %arg0) /* Last fdce and addr adjust */
movb,tr %arg3, %r31, fdmanyloop /* Re-init inner loop count */
ADDIB<=,n -1, %arg2, fdsync /* Outer loop decr */
fdoneloop: /* Loop if LOOP = 1 */
ADDIB> -1, %arg2, fdoneloop /* Outer loop count decr */
fdce,m %arg1(%sr1, %arg0) /* Fdce for one loop */
fdsync:
syncdma
sync
mtsm %r22 /* restore I-bit */
bv %r0(%r2)
nop
.exit
.procend
.export copy_user_page_asm,code
.align 16
copy_user_page_asm:
.proc
.callinfo NO_CALLS
.entry
#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(%r25), %r19
ldi ASM_PAGE_SIZE_DIV128, %r1
ldw 64(%r25), %r0 /* prefetch 1 cacheline ahead */
ldw 128(%r25), %r0 /* prefetch 2 */
1: ldd 8(%r25), %r20
ldw 192(%r25), %r0 /* prefetch 3 */
ldw 256(%r25), %r0 /* prefetch 4 */
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
std %r19, 96(%r26)
std %r20, 104(%r26)
ldo 128(%r25), %r25
std %r21, 112(%r26)
std %r22, 120(%r26)
ldo 128(%r26), %r26
/* 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>,n -1, %r1, 1b /* bundle 10 */
ldd 0(%r25), %r19 /* start next loads */
#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 ASM_PAGE_SIZE_DIV64, %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>,n -1, %r1, 1b
ldw 0(%r25), %r19
#endif
bv %r0(%r2)
nop
.exit
.procend
/*
* 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
*/
#if 0
/*
* We can't do this since copy_user_page is used to bring in
* file data that might have instructions. Since the data would
* then need to be flushed out so the i-fetch can see it, it
* makes more sense to just copy through the kernel translation
* and flush it.
*
* 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.
*/
.export copy_user_page_asm,code
copy_user_page_asm:
.proc
.callinfo NO_CALLS
.entry
ldil L%(__PAGE_OFFSET), %r1
sub %r26, %r1, %r26
sub %r25, %r1, %r23 /* move physical addr into non shadowed reg */
ldil L%(TMPALIAS_MAP_START), %r28
/* FIXME for different page sizes != 4k */
#ifdef CONFIG_64BIT
extrd,u %r26,56,32, %r26 /* convert phys addr to tlb insert format */
extrd,u %r23,56,32, %r23 /* convert phys addr to tlb insert format */
depd %r24,63,22, %r28 /* Form aliased virtual address 'to' */
depdi 0, 63,12, %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, 31,12, %r28 /* Clear any offset bits */
copy %r28, %r29
depwi 1, 9,1, %r29 /* Form aliased virtual address 'from' */
#endif
/* Purge any old translations */
pdtlb 0(%r28)
pdtlb 0(%r29)
ldi 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> -1, %r1,1b
ldo 64(%r29), %r29
bv %r0(%r2)
nop
.exit
.procend
#endif
.export __clear_user_page_asm,code
__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 */
/* FIXME: page size dependend */
#endif
extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
depdi 0, 63,12, %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, 31,12, %r28 /* Clear any offset bits */
#endif
/* Purge any old translation */
pdtlb 0(%r28)
#ifdef CONFIG_64BIT
ldi ASM_PAGE_SIZE_DIV128, %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> -1, %r1, 1b
ldo 128(%r28), %r28
#else /* ! CONFIG_64BIT */
ldi ASM_PAGE_SIZE_DIV64, %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> -1, %r1, 1b
ldo 64(%r28), %r28
#endif /* CONFIG_64BIT */
bv %r0(%r2)
nop
.exit
.procend
.export flush_kernel_dcache_page_asm
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<< %r26, %r25,1b
fdc,m %r23(%r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export flush_user_dcache_page
flush_user_dcache_page:
.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(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
fdc,m %r23(%sr3, %r26)
CMPB<< %r26, %r25,1b
fdc,m %r23(%sr3, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export flush_user_icache_page
flush_user_icache_page:
.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: fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
fic,m %r23(%sr3, %r26)
CMPB<< %r26, %r25,1b
fic,m %r23(%sr3, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export purge_kernel_dcache_page
purge_kernel_dcache_page:
.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<< %r26, %r25, 1b
pdc,m %r23(%r26)
sync
bv %r0(%r2)
nop
.exit
.procend
#if 0
/* Currently not used, but it still is a possible alternate
* solution.
*/
.export flush_alias_page
flush_alias_page:
.proc
.callinfo NO_CALLS
.entry
tophys_r1 %r26
ldil L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
extrd,u %r26, 56,32, %r26 /* convert phys addr to tlb insert format */
depd %r25, 63,22, %r28 /* Form aliased virtual address 'to' */
depdi 0, 63,12, %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, 31,12, %r28 /* Clear any offset bits */
#endif
/* Purge any old translation */
pdtlb 0(%r28)
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
#ifdef CONFIG_64BIT
depdi,z 1, 63-PAGE_SHIFT,1, %r29
#else
depwi,z 1, 31-PAGE_SHIFT,1, %r29
#endif
add %r28, %r29, %r29
sub %r29, %r23, %r29
1: fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
fdc,m %r23(%r28)
CMPB<< %r28, %r29, 1b
fdc,m %r23(%r28)
sync
bv %r0(%r2)
nop
.exit
.procend
#endif
.export flush_user_dcache_range_asm
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<<,n %r26, %r25, 1b
fdc,m %r23(%sr3, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export flush_kernel_dcache_range_asm
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<<,n %r26, %r25,1b
fdc,m %r23(%r26)
sync
syncdma
bv %r0(%r2)
nop
.exit
.procend
.export flush_user_icache_range_asm
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<<,n %r26, %r25,1b
fic,m %r23(%sr3, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export flush_kernel_icache_page
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<< %r26, %r25, 1b
fic,m %r23(%sr4, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
.export flush_kernel_icache_range_asm
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<<,n %r26, %r25, 1b
fic,m %r23(%sr4, %r26)
sync
bv %r0(%r2)
nop
.exit
.procend
/* align should cover use of rfi in disable_sr_hashing_asm and
* srdis_done.
*/
.align 256
.export disable_sr_hashing_asm,code
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
.end
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