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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/parisc/kernel/pacache.S
downloadlinux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
linux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/parisc/kernel/pacache.S')
-rw-r--r--arch/parisc/kernel/pacache.S1086
1 files changed, 1086 insertions, 0 deletions
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
new file mode 100644
index 000000000000..77e03bc0f935
--- /dev/null
+++ b/arch/parisc/kernel/pacache.S
@@ -0,0 +1,1086 @@
+/*
+ * 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 __LP64__
+#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 <asm/assembly.h>
+#include <asm/psw.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.
+ */
+
+ /*
+ * Once again, we do the rfi dance ... some day we need examine
+ * all of our uses of this type of code and see what can be
+ * consolidated.
+ */
+
+ rsm PSW_SM_I, %r19 /* relied upon translation! PA 2.0 Arch. F-5 */
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+
+ rsm PSW_SM_Q, %r0 /* Turn off Q bit to load iia queue */
+ ldil L%REAL_MODE_PSW, %r1
+ ldo R%REAL_MODE_PSW(%r1), %r1
+ mtctl %r1, %cr22
+ mtctl %r0, %cr17 /* Clear IIASQ tail */
+ mtctl %r0, %cr17 /* Clear IIASQ head */
+ ldil L%PA(1f), %r1
+ ldo R%PA(1f)(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ head */
+ ldo 4(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ tail */
+ rfi
+ nop
+
+1: ldil L%PA(cache_info), %r1
+ ldo R%PA(cache_info)(%r1), %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 */
+
+ rsm PSW_SM_Q, %r0 /* clear Q bit to load iia queue */
+ ldil L%KERNEL_PSW, %r1
+ ldo R%KERNEL_PSW(%r1), %r1
+ or %r1, %r19, %r1 /* Set I bit if set on entry */
+ mtctl %r1, %cr22
+ mtctl %r0, %cr17 /* Clear IIASQ tail */
+ mtctl %r0, %cr17 /* Clear IIASQ head */
+ ldil L%(2f), %r1
+ ldo R%(2f)(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ head */
+ ldo 4(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ tail */
+ 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
+ ldil L%cache_info, %r1
+ ldo R%cache_info(%r1), %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 0(%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
+ 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
+ ldil L%cache_info, %r1
+ ldo R%cache_info(%r1), %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 0(%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
+ bv %r0(%r2)
+ nop
+ .exit
+
+ .procend
+
+ .export copy_user_page_asm,code
+ .align 16
+
+copy_user_page_asm:
+ .proc
+ .callinfo NO_CALLS
+ .entry
+
+#ifdef __LP64__
+ /* 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 32, %r1 /* PAGE_SIZE/128 == 32 */
+ 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
+
+ ADDIB> -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.
+ */
+ ldi 64, %r1 /* PAGE_SIZE/64 == 64 */
+
+1:
+ ldw 0(%r25), %r19
+ 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)
+ stw %r21, 56(%r26)
+ stw %r22, 60(%r26)
+ ldo 64(%r26), %r26
+ ADDIB> -1, %r1, 1b
+ ldo 64(%r25), %r25
+#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
+#ifdef __LP64__
+ 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 __LP64__
+#if (TMPALIAS_MAP_START >= 0x80000000)
+ depdi 0, 31,32, %r28 /* clear any sign extension */
+#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 __LP64__
+ ldi 32, %r1 /* PAGE_SIZE/128 == 32 */
+
+ /* 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 /* ! __LP64 */
+
+ ldi 64, %r1 /* PAGE_SIZE/64 == 64 */
+
+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 /* __LP64 */
+
+ bv %r0(%r2)
+ nop
+ .exit
+
+ .procend
+
+ .export flush_kernel_dcache_page
+
+flush_kernel_dcache_page:
+ .proc
+ .callinfo NO_CALLS
+ .entry
+
+ ldil L%dcache_stride, %r1
+ ldw R%dcache_stride(%r1), %r23
+
+#ifdef __LP64__
+ 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 __LP64__
+ 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 __LP64__
+ 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 __LP64__
+ 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 __LP64__
+ 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 __LP64__
+ 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 __LP64__
+ 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(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ fic,m %r23(%r26)
+ CMPB<< %r26, %r25, 1b
+ fic,m %r23(%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(%r26)
+
+ sync
+ bv %r0(%r2)
+ nop
+ .exit
+
+ .procend
+
+ .align 128
+
+ .export disable_sr_hashing_asm,code
+
+disable_sr_hashing_asm:
+ .proc
+ .callinfo NO_CALLS
+ .entry
+
+ /* Switch to real mode */
+
+ ssm 0, %r0 /* relied upon translation! */
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+
+ rsm (PSW_SM_Q|PSW_SM_I), %r0 /* disable Q&I to load the iia queue */
+ ldil L%REAL_MODE_PSW, %r1
+ ldo R%REAL_MODE_PSW(%r1), %r1
+ mtctl %r1, %cr22
+ mtctl %r0, %cr17 /* Clear IIASQ tail */
+ mtctl %r0, %cr17 /* Clear IIASQ head */
+ ldil L%PA(1f), %r1
+ ldo R%PA(1f)(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ head */
+ ldo 4(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ tail */
+ 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+ */
+
+ .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_Q, %r0 /* clear Q bit to load iia queue */
+ ldil L%KERNEL_PSW, %r1
+ ldo R%KERNEL_PSW(%r1), %r1
+ mtctl %r1, %cr22
+ mtctl %r0, %cr17 /* Clear IIASQ tail */
+ mtctl %r0, %cr17 /* Clear IIASQ head */
+ ldil L%(2f), %r1
+ ldo R%(2f)(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ head */
+ ldo 4(%r1), %r1
+ mtctl %r1, %cr18 /* IIAOQ tail */
+ rfi
+ nop
+
+2: bv %r0(%r2)
+ nop
+ .exit
+
+ .procend
+
+ .end