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Diffstat (limited to 'arch/parisc/kernel/pacache.S')
| -rw-r--r-- | arch/parisc/kernel/pacache.S | 1294 |
1 files changed, 1294 insertions, 0 deletions
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S new file mode 100644 index 000000000..b743a80ea --- /dev/null +++ b/arch/parisc/kernel/pacache.S @@ -0,0 +1,1294 @@ +/* + * 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 + .level 2.0w +#else + .level 2.0 +#endif + +#include <asm/psw.h> +#include <asm/assembly.h> +#include <asm/pgtable.h> +#include <asm/cache.h> +#include <linux/linkage.h> + + .text + .align 128 + +ENTRY(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,COND(=) -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,COND(>) -1, %r31, fitmanymiddle /* Adjusted inner loop decr */ + pitlbe 0(%sr1, %r28) + pitlbe,m %arg1(%sr1, %r28) /* Last pitlbe and addr adjust */ + addib,COND(>) -1, %r29, fitmanymiddle /* Middle loop decr */ + copy %arg3, %r31 /* Re-init inner loop count */ + + movb,tr %arg0, %r28, fitmanyloop /* Re-init base addr */ + addib,COND(<=),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,COND(>) -1, %r29, fitonemiddle /* Middle loop count decr */ + pitlbe,m %arg1(%sr1, %r28) /* pitlbe for one loop */ + + addib,COND(>) -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,COND(=) -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,COND(>) -1, %r31, fdtmanymiddle /* Adjusted inner loop decr */ + pdtlbe 0(%sr1, %r28) + pdtlbe,m %arg1(%sr1, %r28) /* Last pdtlbe and addr adjust */ + addib,COND(>) -1, %r29, fdtmanymiddle /* Middle loop decr */ + copy %arg3, %r31 /* Re-init inner loop count */ + + movb,tr %arg0, %r28, fdtmanyloop /* Re-init base addr */ + addib,COND(<=),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,COND(>) -1, %r29, fdtonemiddle /* Middle loop count decr */ + pdtlbe,m %arg1(%sr1, %r28) /* pdtlbe for one loop */ + + addib,COND(>) -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 +ENDPROC(flush_tlb_all_local) + + .import cache_info,data + +ENTRY(flush_instruction_cache_local) + .proc + .callinfo NO_CALLS + .entry + + 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*/ + mtsp %r0, %sr1 + addib,COND(=) -1, %arg3, fioneloop /* Preadjust and test */ + movb,<,n %arg3, %r31, fisync /* If loop < 0, do sync */ + +fimanyloop: /* Loop if LOOP >= 2 */ + addib,COND(>) -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,COND(<=),n -1, %arg2, fisync /* Outer loop decr */ + +fioneloop: /* Loop if LOOP = 1 */ + /* Some implementations may flush with a single fice instruction */ + cmpib,COND(>>=),n 15, %arg2, fioneloop2 + +fioneloop1: + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + fice,m %arg1(%sr1, %arg0) + addib,COND(>) -16, %arg2, fioneloop1 + fice,m %arg1(%sr1, %arg0) + + /* Check if done */ + cmpb,COND(=),n %arg2, %r0, fisync /* Predict branch taken */ + +fioneloop2: + addib,COND(>) -1, %arg2, fioneloop2 /* 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 +ENDPROC(flush_instruction_cache_local) + + + .import cache_info, data +ENTRY(flush_data_cache_local) + .proc + .callinfo NO_CALLS + .entry + + 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 /* No mmgt ops during loop*/ + mtsp %r0, %sr1 + addib,COND(=) -1, %arg3, fdoneloop /* Preadjust and test */ + movb,<,n %arg3, %r31, fdsync /* If loop < 0, do sync */ + +fdmanyloop: /* Loop if LOOP >= 2 */ + addib,COND(>) -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,COND(<=),n -1, %arg2, fdsync /* Outer loop decr */ + +fdoneloop: /* Loop if LOOP = 1 */ + /* Some implementations may flush with a single fdce instruction */ + cmpib,COND(>>=),n 15, %arg2, fdoneloop2 + +fdoneloop1: + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + fdce,m %arg1(%sr1, %arg0) + addib,COND(>) -16, %arg2, fdoneloop1 + fdce,m %arg1(%sr1, %arg0) + + /* Check if done */ + cmpb,COND(=),n %arg2, %r0, fdsync /* Predict branch taken */ + +fdoneloop2: + addib,COND(>) -1, %arg2, fdoneloop2 /* 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 +ENDPROC(flush_data_cache_local) + + .align 16 + +/* Macros to serialize TLB purge operations on SMP. */ + + .macro tlb_lock la,flags,tmp +#ifdef CONFIG_SMP + ldil L%pa_tlb_lock,%r1 + ldo R%pa_tlb_lock(%r1),\la + rsm PSW_SM_I,\flags +1: LDCW 0(\la),\tmp + cmpib,<>,n 0,\tmp,3f +2: ldw 0(\la),\tmp + cmpb,<> %r0,\tmp,1b + nop + b,n 2b +3: +#endif + .endm + + .macro tlb_unlock la,flags,tmp +#ifdef CONFIG_SMP + ldi 1,\tmp + stw \tmp,0(\la) + mtsm \flags +#endif + .endm + +/* Clear page using kernel mapping. */ + +ENTRY(clear_page_asm) + .proc + .callinfo NO_CALLS + .entry + +#ifdef CONFIG_64BIT + + /* Unroll the loop. */ + ldi (PAGE_SIZE / 128), %r1 + +1: + std %r0, 0(%r26) + std %r0, 8(%r26) + std %r0, 16(%r26) + std %r0, 24(%r26) + std %r0, 32(%r26) + std %r0, 40(%r26) + std %r0, 48(%r26) + std %r0, 56(%r26) + std %r0, 64(%r26) + std %r0, 72(%r26) + std %r0, 80(%r26) + std %r0, 88(%r26) + std %r0, 96(%r26) + std %r0, 104(%r26) + std %r0, 112(%r26) + std %r0, 120(%r26) + + /* Note reverse branch hint for addib is taken. */ + addib,COND(>),n -1, %r1, 1b + ldo 128(%r26), %r26 + +#else + + /* + * Note that until (if) we start saving the full 64-bit register + * values on interrupt, we can't use std on a 32 bit kernel. + */ + ldi (PAGE_SIZE / 64), %r1 + +1: + stw %r0, 0(%r26) + stw %r0, 4(%r26) + stw %r0, 8(%r26) + stw %r0, 12(%r26) + stw %r0, 16(%r26) + stw %r0, 20(%r26) + stw %r0, 24(%r26) + stw %r0, 28(%r26) + stw %r0, 32(%r26) + stw %r0, 36(%r26) + stw %r0, 40(%r26) + stw %r0, 44(%r26) + stw %r0, 48(%r26) + stw %r0, 52(%r26) + stw %r0, 56(%r26) + stw %r0, 60(%r26) + + addib,COND(>),n -1, %r1, 1b + ldo 64(%r26), %r26 +#endif + bv %r0(%r2) + nop + .exit + + .procend +ENDPROC(clear_page_asm) + +/* Copy page using kernel mapping. */ + +ENTRY(copy_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. + * 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(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 + + /* + * 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. + * + */ + +ENTRY(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 0(%r28) + pdtlb,l 0(%r29) +#else + tlb_lock %r20,%r21,%r22 + pdtlb 0(%r28) + pdtlb 0(%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(copy_user_page_asm) + +ENTRY(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 0(%r28) +#else + tlb_lock %r20,%r21,%r22 + pdtlb 0(%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(clear_user_page_asm) + +ENTRY(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 0(%r28) +#else + tlb_lock %r20,%r21,%r22 + pdtlb 0(%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 + +#ifdef CONFIG_PA20 + pdtlb,l 0(%r25) +#else + tlb_lock %r20,%r21,%r22 + pdtlb 0(%r25) + tlb_unlock %r20,%r21,%r22 +#endif + + bv %r0(%r2) + nop + .exit + + .procend +ENDPROC(flush_dcache_page_asm) + +ENTRY(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 */ + +#ifdef CONFIG_PA20 + pitlb,l %r0(%sr4,%r28) +#else + tlb_lock %r20,%r21,%r22 + pitlb (%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 + +#ifdef CONFIG_PA20 + pitlb,l %r0(%sr4,%r25) +#else + tlb_lock %r20,%r21,%r22 + pitlb (%sr4,%r25) + tlb_unlock %r20,%r21,%r22 +#endif + + bv %r0(%r2) + nop + .exit + + .procend +ENDPROC(flush_icache_page_asm) + +ENTRY(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(flush_kernel_dcache_page_asm) + +ENTRY(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(purge_kernel_dcache_page_asm) + +ENTRY(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(flush_user_dcache_range_asm) + +ENTRY(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(flush_kernel_dcache_range_asm) + +ENTRY(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(flush_user_icache_range_asm) + +ENTRY(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(flush_kernel_icache_page) + +ENTRY(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(flush_kernel_icache_range_asm) + + /* align should cover use of rfi in disable_sr_hashing_asm and + * srdis_done. + */ + .align 256 +ENTRY(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(disable_sr_hashing_asm) + + .end |