patch-2.4.19 linux-2.4.19/arch/mips/mm/r4xx0.c
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- Lines: 2714
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.18/arch/mips/mm/r4xx0.c
- Orig date:
Sun Sep 30 12:26:08 2001
diff -urN linux-2.4.18/arch/mips/mm/r4xx0.c linux-2.4.19/arch/mips/mm/r4xx0.c
@@ -1,2713 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * r4xx0.c: R4000 processor variant specific MMU/Cache routines.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- * Copyright (C) 1997, 1998, 1999, 2000 Ralf Baechle ralf@gnu.org
- *
- * To do:
- *
- * - this code is a overbloated pig
- * - many of the bug workarounds are not efficient at all, but at
- * least they are functional ...
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-
-#include <asm/bootinfo.h>
-#include <asm/cpu.h>
-#include <asm/bcache.h>
-#include <asm/io.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/mmu_context.h>
-
-/* CP0 hazard avoidance. */
-#define BARRIER __asm__ __volatile__(".set noreorder\n\t" \
- "nop; nop; nop; nop; nop; nop;\n\t" \
- ".set reorder\n\t")
-
-/* Primary cache parameters. */
-static int icache_size, dcache_size; /* Size in bytes */
-static int ic_lsize, dc_lsize; /* LineSize in bytes */
-
-/* Secondary cache (if present) parameters. */
-static unsigned int scache_size, sc_lsize; /* Again, in bytes */
-
-#include <asm/cacheops.h>
-#include <asm/r4kcache.h>
-
-#undef DEBUG_CACHE
-
-/*
- * Dummy cache handling routines for machines without boardcaches
- */
-static void no_sc_noop(void) {}
-
-static struct bcache_ops no_sc_ops = {
- (void *)no_sc_noop, (void *)no_sc_noop,
- (void *)no_sc_noop, (void *)no_sc_noop
-};
-
-struct bcache_ops *bcops = &no_sc_ops;
-
-/*
- * On processors with QED R4600 style two set assosicative cache
- * this is the bit which selects the way in the cache for the
- * indexed cachops.
- */
-#define icache_waybit (icache_size >> 1)
-#define dcache_waybit (dcache_size >> 1)
-
-/*
- * Zero an entire page. Basically a simple unrolled loop should do the
- * job but we want more performance by saving memory bus bandwidth. We
- * have five flavours of the routine available for:
- *
- * - 16byte cachelines and no second level cache
- * - 32byte cachelines second level cache
- * - a version which handles the buggy R4600 v1.x
- * - a version which handles the buggy R4600 v2.0
- * - Finally a last version without fancy cache games for the SC and MC
- * versions of R4000 and R4400.
- */
-
-static void r4k_clear_page_d16(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "cache\t%3,16(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "cache\t%3,-16(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D)
- :"$1","memory");
-}
-
-static void r4k_clear_page_d32(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D)
- :"$1","memory");
-}
-
-
-/*
- * This flavour of r4k_clear_page is for the R4600 V1.x. Cite from the
- * IDT R4600 V1.7 errata:
- *
- * 18. The CACHE instructions Hit_Writeback_Invalidate_D, Hit_Writeback_D,
- * Hit_Invalidate_D and Create_Dirty_Excl_D should only be
- * executed if there is no other dcache activity. If the dcache is
- * accessed for another instruction immeidately preceding when these
- * cache instructions are executing, it is possible that the dcache
- * tag match outputs used by these cache instructions will be
- * incorrect. These cache instructions should be preceded by at least
- * four instructions that are not any kind of load or store
- * instruction.
- *
- * This is not allowed: lw
- * nop
- * nop
- * nop
- * cache Hit_Writeback_Invalidate_D
- *
- * This is allowed: lw
- * nop
- * nop
- * nop
- * nop
- * cache Hit_Writeback_Invalidate_D
- */
-static void r4k_clear_page_r4600_v1(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tnop\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "cache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D)
- :"$1","memory");
-}
-
-/*
- * And this one is for the R4600 V2.0
- */
-static void r4k_clear_page_r4600_v2(void * page)
-{
- unsigned int flags;
-
- __save_and_cli(flags);
- *(volatile unsigned int *)KSEG1;
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D)
- :"$1","memory");
- __restore_flags(flags);
-}
-
-/*
- * The next 4 versions are optimized for all possible scache configurations
- * of the SC / MC versions of R4000 and R4400 ...
- *
- * Todo: For even better performance we should have a routine optimized for
- * every legal combination of dcache / scache linesize. When I (Ralf) tried
- * this the kernel crashed shortly after mounting the root filesystem. CPU
- * bug? Weirdo cache instruction semantics?
- */
-static void r4k_clear_page_s16(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "cache\t%3,16(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "cache\t%3,-16(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD)
- :"$1","memory");
-}
-
-static void r4k_clear_page_s32(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "cache\t%3,-32(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD)
- :"$1","memory");
-}
-
-static void r4k_clear_page_s64(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD)
- :"$1","memory");
-}
-
-static void r4k_clear_page_s128(void * page)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%2\n"
- "1:\tcache\t%3,(%0)\n\t"
- "sd\t$0,(%0)\n\t"
- "sd\t$0,8(%0)\n\t"
- "sd\t$0,16(%0)\n\t"
- "sd\t$0,24(%0)\n\t"
- "sd\t$0,32(%0)\n\t"
- "sd\t$0,40(%0)\n\t"
- "sd\t$0,48(%0)\n\t"
- "sd\t$0,56(%0)\n\t"
- "daddiu\t%0,128\n\t"
- "sd\t$0,-64(%0)\n\t"
- "sd\t$0,-56(%0)\n\t"
- "sd\t$0,-48(%0)\n\t"
- "sd\t$0,-40(%0)\n\t"
- "sd\t$0,-32(%0)\n\t"
- "sd\t$0,-24(%0)\n\t"
- "sd\t$0,-16(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sd\t$0,-8(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (page)
- :"0" (page),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD)
- :"$1","memory");
-}
-
-
-/*
- * This is still inefficient. We only can do better if we know the
- * virtual address where the copy will be accessed.
- */
-
-static void r4k_copy_page_d16(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "cache\t%9,16(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "cache\t%9,-16(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D));
-}
-
-static void r4k_copy_page_d32(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D));
-}
-
-/*
- * Again a special version for the R4600 V1.x
- */
-static void r4k_copy_page_r4600_v1(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tnop\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D));
-}
-
-static void r4k_copy_page_r4600_v2(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
- unsigned int flags;
-
- __save_and_cli(flags);
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tnop\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "nop\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_D));
- __restore_flags(flags);
-}
-
-/*
- * These are for R4000SC / R4400MC
- */
-static void r4k_copy_page_s16(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "cache\t%9,16(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "cache\t%9,-16(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD));
-}
-
-static void r4k_copy_page_s32(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "cache\t%9,32(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD));
-}
-
-static void r4k_copy_page_s64(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "daddiu\t%0,64\n\t"
- "daddiu\t%1,64\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD));
-}
-
-static void r4k_copy_page_s128(void * to, void * from)
-{
- unsigned long dummy1, dummy2;
- unsigned long reg1, reg2, reg3, reg4;
-
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- ".set\tmips3\n\t"
- "daddiu\t$1,%0,%8\n"
- "1:\tcache\t%9,(%0)\n\t"
- "lw\t%2,(%1)\n\t"
- "lw\t%3,4(%1)\n\t"
- "lw\t%4,8(%1)\n\t"
- "lw\t%5,12(%1)\n\t"
- "sw\t%2,(%0)\n\t"
- "sw\t%3,4(%0)\n\t"
- "sw\t%4,8(%0)\n\t"
- "sw\t%5,12(%0)\n\t"
- "lw\t%2,16(%1)\n\t"
- "lw\t%3,20(%1)\n\t"
- "lw\t%4,24(%1)\n\t"
- "lw\t%5,28(%1)\n\t"
- "sw\t%2,16(%0)\n\t"
- "sw\t%3,20(%0)\n\t"
- "sw\t%4,24(%0)\n\t"
- "sw\t%5,28(%0)\n\t"
- "lw\t%2,32(%1)\n\t"
- "lw\t%3,36(%1)\n\t"
- "lw\t%4,40(%1)\n\t"
- "lw\t%5,44(%1)\n\t"
- "sw\t%2,32(%0)\n\t"
- "sw\t%3,36(%0)\n\t"
- "sw\t%4,40(%0)\n\t"
- "sw\t%5,44(%0)\n\t"
- "lw\t%2,48(%1)\n\t"
- "lw\t%3,52(%1)\n\t"
- "lw\t%4,56(%1)\n\t"
- "lw\t%5,60(%1)\n\t"
- "sw\t%2,48(%0)\n\t"
- "sw\t%3,52(%0)\n\t"
- "sw\t%4,56(%0)\n\t"
- "sw\t%5,60(%0)\n\t"
- "daddiu\t%0,128\n\t"
- "daddiu\t%1,128\n\t"
- "lw\t%2,-64(%1)\n\t"
- "lw\t%3,-60(%1)\n\t"
- "lw\t%4,-56(%1)\n\t"
- "lw\t%5,-52(%1)\n\t"
- "sw\t%2,-64(%0)\n\t"
- "sw\t%3,-60(%0)\n\t"
- "sw\t%4,-56(%0)\n\t"
- "sw\t%5,-52(%0)\n\t"
- "lw\t%2,-48(%1)\n\t"
- "lw\t%3,-44(%1)\n\t"
- "lw\t%4,-40(%1)\n\t"
- "lw\t%5,-36(%1)\n\t"
- "sw\t%2,-48(%0)\n\t"
- "sw\t%3,-44(%0)\n\t"
- "sw\t%4,-40(%0)\n\t"
- "sw\t%5,-36(%0)\n\t"
- "lw\t%2,-32(%1)\n\t"
- "lw\t%3,-28(%1)\n\t"
- "lw\t%4,-24(%1)\n\t"
- "lw\t%5,-20(%1)\n\t"
- "sw\t%2,-32(%0)\n\t"
- "sw\t%3,-28(%0)\n\t"
- "sw\t%4,-24(%0)\n\t"
- "sw\t%5,-20(%0)\n\t"
- "lw\t%2,-16(%1)\n\t"
- "lw\t%3,-12(%1)\n\t"
- "lw\t%4,-8(%1)\n\t"
- "lw\t%5,-4(%1)\n\t"
- "sw\t%2,-16(%0)\n\t"
- "sw\t%3,-12(%0)\n\t"
- "sw\t%4,-8(%0)\n\t"
- "bne\t$1,%0,1b\n\t"
- "sw\t%5,-4(%0)\n\t"
- ".set\tmips0\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- :"=r" (dummy1), "=r" (dummy2),
- "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
- :"0" (to), "1" (from),
- "I" (PAGE_SIZE),
- "i" (Create_Dirty_Excl_SD));
-}
-
-
-/*
- * If you think for one second that this stuff coming up is a lot
- * of bulky code eating too many kernel cache lines. Think _again_.
- *
- * Consider:
- * 1) Taken branches have a 3 cycle penalty on R4k
- * 2) The branch itself is a real dead cycle on even R4600/R5000.
- * 3) Only one of the following variants of each type is even used by
- * the kernel based upon the cache parameters we detect at boot time.
- *
- * QED.
- */
-
-static inline void r4k_flush_cache_all_s16d16i16(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16(); blast_scache16();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s32d16i16(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16(); blast_scache32();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s64d16i16(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16(); blast_scache64();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s128d16i16(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16(); blast_scache128();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s32d32i32(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache32(); blast_icache32(); blast_scache32();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s64d32i32(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache32(); blast_icache32(); blast_scache64();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_s128d32i32(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache32(); blast_icache32(); blast_scache128();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_d16i16(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16();
- __restore_flags(flags);
-}
-
-static inline void r4k_flush_cache_all_d32i32(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_dcache32(); blast_icache32();
- __restore_flags(flags);
-}
-
-static void
-r4k_flush_cache_range_s16d16i16(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s16d16i16();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache16_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void
-r4k_flush_cache_range_s32d16i16(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s32d16i16();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache32_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_s64d16i16(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if(vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s64d16i16();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache64_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_s128d16i16(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s128d16i16();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache128_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_s32d32i32(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s32d32i32();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache32_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_s64d32i32(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s64d32i32();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache64_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_s128d32i32(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- struct vm_area_struct *vma;
- unsigned long flags;
-
- if (mm->context == 0)
- return;
-
- start &= PAGE_MASK;
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- vma = find_vma(mm, start);
- if (vma) {
- if (mm->context != current->active_mm->context) {
- r4k_flush_cache_all_s128d32i32();
- } else {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
-
- __save_and_cli(flags);
- while(start < end) {
- pgd = pgd_offset(mm, start);
- pmd = pmd_offset(pgd, start);
- pte = pte_offset(pmd, start);
-
- if(pte_val(*pte) & _PAGE_VALID)
- blast_scache128_page(start);
- start += PAGE_SIZE;
- }
- __restore_flags(flags);
- }
- }
-}
-
-static void r4k_flush_cache_range_d16i16(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- if (mm->context != 0) {
- unsigned long flags;
-
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- __save_and_cli(flags);
- blast_dcache16(); blast_icache16();
- __restore_flags(flags);
- }
-}
-
-static void r4k_flush_cache_range_d32i32(struct mm_struct *mm,
- unsigned long start,
- unsigned long end)
-{
- if (mm->context != 0) {
- unsigned long flags;
-
-#ifdef DEBUG_CACHE
- printk("crange[%d,%08lx,%08lx]", (int)mm->context, start, end);
-#endif
- __save_and_cli(flags);
- blast_dcache32(); blast_icache32();
- __restore_flags(flags);
- }
-}
-
-/*
- * On architectures like the Sparc, we could get rid of lines in
- * the cache created only by a certain context, but on the MIPS
- * (and actually certain Sparc's) we cannot.
- */
-static void r4k_flush_cache_mm_s16d16i16(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s16d16i16();
- }
-}
-
-static void r4k_flush_cache_mm_s32d16i16(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s32d16i16();
- }
-}
-
-static void r4k_flush_cache_mm_s64d16i16(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s64d16i16();
- }
-}
-
-static void r4k_flush_cache_mm_s128d16i16(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s128d16i16();
- }
-}
-
-static void r4k_flush_cache_mm_s32d32i32(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s32d32i32();
- }
-}
-
-static void r4k_flush_cache_mm_s64d32i32(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s64d32i32();
- }
-}
-
-static void r4k_flush_cache_mm_s128d32i32(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_s128d32i32();
- }
-}
-
-static void r4k_flush_cache_mm_d16i16(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_d16i16();
- }
-}
-
-static void r4k_flush_cache_mm_d32i32(struct mm_struct *mm)
-{
- if (mm->context != 0) {
-#ifdef DEBUG_CACHE
- printk("cmm[%d]", (int)mm->context);
-#endif
- r4k_flush_cache_all_d32i32();
- }
-}
-
-static void r4k_flush_cache_page_s16d16i16(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache16_page_indexed(page);
- blast_scache16_page_indexed(page);
- } else
- blast_scache16_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s32d16i16(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /* If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache16_page_indexed(page);
- blast_scache32_page_indexed(page);
- } else
- blast_scache32_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s64d16i16(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /* If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache16_page_indexed(page);
- blast_scache64_page_indexed(page);
- } else
- blast_scache64_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s128d16i16(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache16_page_indexed(page);
- blast_scache128_page_indexed(page);
- } else
- blast_scache128_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s32d32i32(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache32_page_indexed(page);
- blast_scache32_page_indexed(page);
- } else
- blast_scache32_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s64d32i32(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache32_page_indexed(page);
- blast_scache64_page_indexed(page);
- } else
- blast_scache64_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_s128d32i32(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm->context != current->active_mm->context) {
- /* Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (scache_size - 1)));
- blast_dcache32_page_indexed(page);
- blast_scache128_page_indexed(page);
- } else
- blast_scache128_page(page);
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_d16i16(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_VALID))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if (mm == current->active_mm) {
- blast_dcache16_page(page);
- } else {
- /* Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (dcache_size - 1)));
- blast_dcache16_page_indexed(page);
- }
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_d32i32(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_PRESENT))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) {
- blast_dcache32_page(page);
- } else {
- /*
- * Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (dcache_size - 1)));
- blast_dcache32_page_indexed(page);
- }
-out:
- __restore_flags(flags);
-}
-
-static void r4k_flush_cache_page_d32i32_r4600(struct vm_area_struct *vma,
- unsigned long page)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- /*
- * If ownes no valid ASID yet, cannot possibly have gotten
- * this page into the cache.
- */
- if (mm->context == 0)
- return;
-
-#ifdef DEBUG_CACHE
- printk("cpage[%d,%08lx]", (int)mm->context, page);
-#endif
- __save_and_cli(flags);
- page &= PAGE_MASK;
- pgdp = pgd_offset(mm, page);
- pmdp = pmd_offset(pgdp, page);
- ptep = pte_offset(pmdp, page);
-
- /*
- * If the page isn't marked valid, the page cannot possibly be
- * in the cache.
- */
- if (!(pte_val(*ptep) & _PAGE_PRESENT))
- goto out;
-
- /*
- * Doing flushes for another ASID than the current one is
- * too difficult since stupid R4k caches do a TLB translation
- * for every cache flush operation. So we do indexed flushes
- * in that case, which doesn't overly flush the cache too much.
- */
- if ((mm == current->active_mm) && (pte_val(*ptep) & _PAGE_VALID)) {
- blast_dcache32_page(page);
- } else {
- /* Do indexed flush, too much work to get the (possible)
- * tlb refills to work correctly.
- */
- page = (KSEG0 + (page & (dcache_size - 1)));
- blast_dcache32_page_indexed(page);
- blast_dcache32_page_indexed(page ^ dcache_waybit);
- }
-out:
- __restore_flags(flags);
-}
-
-/* If the addresses passed to these routines are valid, they are
- * either:
- *
- * 1) In KSEG0, so we can do a direct flush of the page.
- * 2) In KSEG2, and since every process can translate those
- * addresses all the time in kernel mode we can do a direct
- * flush.
- * 3) In KSEG1, no flush necessary.
- */
-static void r4k_flush_page_to_ram_s16(struct page *page)
-{
- blast_scache16_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_s32(struct page *page)
-{
- blast_scache32_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_s64(struct page *page)
-{
- blast_scache64_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_s128(struct page *page)
-{
- blast_scache128_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_d16(struct page *page)
-{
- blast_dcache16_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_d32(struct page *page)
-{
- blast_dcache32_page((unsigned long)page_address(page));
-}
-
-static void r4k_flush_page_to_ram_d32_r4600(struct page *page)
-{
- unsigned long flags;
-
- __save_and_cli(flags); /* For R4600 v1.7 bug. */
- blast_dcache32_page((unsigned long)page_address(page));
- __restore_flags(flags);
-}
-
-static void
-r4k_flush_icache_page_s(struct vm_area_struct *vma, struct page *page)
-{
- /*
- * We did an scache flush therefore PI is already clean.
- */
-}
-
-static void
-r4k_flush_icache_range(unsigned long start, unsigned long end)
-{
- flush_cache_all();
-}
-
-/*
- * Ok, this seriously sucks. We use them to flush a user page but don't
- * know the virtual address, so we have to blast away the whole icache
- * which is significantly more expensive than the real thing.
- */
-static void
-r4k_flush_icache_page_p(struct vm_area_struct *vma, struct page *page)
-{
- if (!(vma->vm_flags & VM_EXEC))
- return;
-
- flush_cache_all();
-}
-
-/*
- * Writeback and invalidate the primary cache dcache before DMA.
- *
- * R4600 v2.0 bug: "The CACHE instructions Hit_Writeback_Inv_D,
- * Hit_Writeback_D, Hit_Invalidate_D and Create_Dirty_Exclusive_D will only
- * operate correctly if the internal data cache refill buffer is empty. These
- * CACHE instructions should be separated from any potential data cache miss
- * by a load instruction to an uncached address to empty the response buffer."
- * (Revision 2.0 device errata from IDT available on http://www.idt.com/
- * in .pdf format.)
- */
-static void
-r4k_dma_cache_wback_inv_pc(unsigned long addr, unsigned long size)
-{
- unsigned long end, a;
- unsigned int flags;
-
- if (size >= dcache_size) {
- flush_cache_all();
- } else {
- /* Workaround for R4600 bug. See comment above. */
- __save_and_cli(flags);
- *(volatile unsigned long *)KSEG1;
-
- a = addr & ~(dc_lsize - 1);
- end = (addr + size) & ~(dc_lsize - 1);
- while (1) {
- flush_dcache_line(a); /* Hit_Writeback_Inv_D */
- if (a == end) break;
- a += dc_lsize;
- }
- __restore_flags(flags);
- }
- bc_wback_inv(addr, size);
-}
-
-static void
-r4k_dma_cache_wback_inv_sc(unsigned long addr, unsigned long size)
-{
- unsigned long end, a;
-
- if (size >= scache_size) {
- flush_cache_all();
- return;
- }
-
- a = addr & ~(sc_lsize - 1);
- end = (addr + size) & ~(sc_lsize - 1);
- while (1) {
- flush_scache_line(a); /* Hit_Writeback_Inv_SD */
- if (a == end) break;
- a += sc_lsize;
- }
-}
-
-static void
-r4k_dma_cache_inv_pc(unsigned long addr, unsigned long size)
-{
- unsigned long end, a;
- unsigned int flags;
-
- if (size >= dcache_size) {
- flush_cache_all();
- } else {
- /* Workaround for R4600 bug. See comment above. */
- __save_and_cli(flags);
- *(volatile unsigned long *)KSEG1;
-
- a = addr & ~(dc_lsize - 1);
- end = (addr + size) & ~(dc_lsize - 1);
- while (1) {
- flush_dcache_line(a); /* Hit_Writeback_Inv_D */
- if (a == end) break;
- a += dc_lsize;
- }
- __restore_flags(flags);
- }
-
- bc_inv(addr, size);
-}
-
-static void
-r4k_dma_cache_inv_sc(unsigned long addr, unsigned long size)
-{
- unsigned long end, a;
-
- if (size >= scache_size) {
- flush_cache_all();
- return;
- }
-
- a = addr & ~(sc_lsize - 1);
- end = (addr + size) & ~(sc_lsize - 1);
- while (1) {
- flush_scache_line(a); /* Hit_Writeback_Inv_SD */
- if (a == end) break;
- a += sc_lsize;
- }
-}
-
-static void
-r4k_dma_cache_wback(unsigned long addr, unsigned long size)
-{
- panic("r4k_dma_cache called - should not happen.\n");
-}
-
-/*
- * While we're protected against bad userland addresses we don't care
- * very much about what happens in that case. Usually a segmentation
- * fault will dump the process later on anyway ...
- */
-static void r4k_flush_cache_sigtramp(unsigned long addr)
-{
- __asm__ __volatile__("nop;nop;nop;nop"); /* R4600 V1.7 */
- protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
- protected_flush_icache_line(addr & ~(ic_lsize - 1));
-}
-
-static void r4600v20k_flush_cache_sigtramp(unsigned long addr)
-{
- unsigned int flags;
-
- __save_and_cli(flags);
-
- /* Clear internal cache refill buffer */
- *(volatile unsigned int *)KSEG1;
-
- protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
- protected_flush_icache_line(addr & ~(ic_lsize - 1));
-
- __restore_flags(flags);
-}
-
-#undef DEBUG_TLB
-#undef DEBUG_TLBUPDATE
-
-void flush_tlb_all(void)
-{
- unsigned long flags;
- unsigned long old_ctx;
- int entry;
-
-#ifdef DEBUG_TLB
- printk("[tlball]");
-#endif
-
- __save_and_cli(flags);
- /* Save old context and create impossible VPN2 value */
- old_ctx = (get_entryhi() & 0xff);
- set_entryhi(KSEG0);
- set_entrylo0(0);
- set_entrylo1(0);
- BARRIER;
-
- entry = get_wired();
-
- /* Blast 'em all away. */
- while(entry < mips_cpu.tlbsize) {
- set_index(entry);
- BARRIER;
- tlb_write_indexed();
- BARRIER;
- entry++;
- }
- BARRIER;
- set_entryhi(old_ctx);
- __restore_flags(flags);
-}
-
-void flush_tlb_mm(struct mm_struct *mm)
-{
- if (mm->context != 0) {
- unsigned long flags;
-
-#ifdef DEBUG_TLB
- printk("[tlbmm<%d>]", mm->context);
-#endif
- __save_and_cli(flags);
- get_new_mmu_context(mm, asid_cache);
- if (mm == current->active_mm)
- set_entryhi(mm->context & 0xff);
- __restore_flags(flags);
- }
-}
-
-void flush_tlb_range(struct mm_struct *mm, unsigned long start,
- unsigned long end)
-{
- if(mm->context != 0) {
- unsigned long flags;
- int size;
-
-#ifdef DEBUG_TLB
- printk("[tlbrange<%02x,%08lx,%08lx>]", (mm->context & 0xff),
- start, end);
-#endif
- __save_and_cli(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- size = (size + 1) >> 1;
- if(size <= mips_cpu.tlbsize/2) {
- int oldpid = (get_entryhi() & 0xff);
- int newpid = (mm->context & 0xff);
-
- start &= (PAGE_MASK << 1);
- end += ((PAGE_SIZE << 1) - 1);
- end &= (PAGE_MASK << 1);
- while(start < end) {
- int idx;
-
- set_entryhi(start | newpid);
- start += (PAGE_SIZE << 1);
- BARRIER;
- tlb_probe();
- BARRIER;
- idx = get_index();
- set_entrylo0(0);
- set_entrylo1(0);
- set_entryhi(KSEG0);
- BARRIER;
- if(idx < 0)
- continue;
- tlb_write_indexed();
- BARRIER;
- }
- set_entryhi(oldpid);
- } else {
- get_new_mmu_context(mm, asid_cache);
- if (mm == current->active_mm)
- set_entryhi(mm->context & 0xff);
- }
- __restore_flags(flags);
- }
-}
-
-void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
- if (vma->vm_mm->context != 0) {
- unsigned long flags;
- int oldpid, newpid, idx;
-
-#ifdef DEBUG_TLB
- printk("[tlbpage<%d,%08lx>]", vma->vm_mm->context, page);
-#endif
- newpid = (vma->vm_mm->context & 0xff);
- page &= (PAGE_MASK << 1);
- __save_and_cli(flags);
- oldpid = (get_entryhi() & 0xff);
- set_entryhi(page | newpid);
- BARRIER;
- tlb_probe();
- BARRIER;
- idx = get_index();
- set_entrylo0(0);
- set_entrylo1(0);
- set_entryhi(KSEG0);
- if(idx < 0)
- goto finish;
- BARRIER;
- tlb_write_indexed();
-
- finish:
- BARRIER;
- set_entryhi(oldpid);
- __restore_flags(flags);
- }
-}
-
-void pgd_init(unsigned long page)
-{
- unsigned long *p = (unsigned long *) page;
- int i;
-
- for(i = 0; i < USER_PTRS_PER_PGD; i+=8) {
- p[i + 0] = (unsigned long) invalid_pte_table;
- p[i + 1] = (unsigned long) invalid_pte_table;
- p[i + 2] = (unsigned long) invalid_pte_table;
- p[i + 3] = (unsigned long) invalid_pte_table;
- p[i + 4] = (unsigned long) invalid_pte_table;
- p[i + 5] = (unsigned long) invalid_pte_table;
- p[i + 6] = (unsigned long) invalid_pte_table;
- p[i + 7] = (unsigned long) invalid_pte_table;
- }
-}
-
-/* We will need multiple versions of update_mmu_cache(), one that just
- * updates the TLB with the new pte(s), and another which also checks
- * for the R4k "end of page" hardware bug and does the needy.
- */
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
-{
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- int idx, pid;
-
- /*
- * Handle debugger faulting in for debugee.
- */
- if (current->active_mm != vma->vm_mm)
- return;
-
- pid = get_entryhi() & 0xff;
-
-#ifdef DEBUG_TLB
- if((pid != (vma->vm_mm->context & 0xff)) || (vma->vm_mm->context == 0)) {
- printk("update_mmu_cache: Wheee, bogus tlbpid mmpid=%d tlbpid=%d\n",
- (int) (vma->vm_mm->context & 0xff), pid);
- }
-#endif
-
- __save_and_cli(flags);
- address &= (PAGE_MASK << 1);
- set_entryhi(address | (pid));
- pgdp = pgd_offset(vma->vm_mm, address);
- BARRIER;
- tlb_probe();
- BARRIER;
- pmdp = pmd_offset(pgdp, address);
- idx = get_index();
- ptep = pte_offset(pmdp, address);
- BARRIER;
- set_entrylo0(pte_val(*ptep++) >> 6);
- set_entrylo1(pte_val(*ptep) >> 6);
- set_entryhi(address | (pid));
- BARRIER;
- if(idx < 0) {
- tlb_write_random();
- } else {
- tlb_write_indexed();
- }
- BARRIER;
- set_entryhi(pid);
- BARRIER;
- __restore_flags(flags);
-}
-
-#if 0
-static void r4k_update_mmu_cache_hwbug(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
-{
- unsigned long flags;
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- int idx;
-
- __save_and_cli(flags);
- address &= (PAGE_MASK << 1);
- set_entryhi(address | (get_entryhi() & 0xff));
- pgdp = pgd_offset(vma->vm_mm, address);
- tlb_probe();
- pmdp = pmd_offset(pgdp, address);
- idx = get_index();
- ptep = pte_offset(pmdp, address);
- set_entrylo0(pte_val(*ptep++) >> 6);
- set_entrylo1(pte_val(*ptep) >> 6);
- BARRIER;
- if(idx < 0)
- tlb_write_random();
- else
- tlb_write_indexed();
- BARRIER;
- __restore_flags(flags);
-}
-#endif
-
-void show_regs(struct pt_regs * regs)
-{
- /* Saved main processor registers. */
- printk("$0 : %08lx %08lx %08lx %08lx\n",
- 0UL, regs->regs[1], regs->regs[2], regs->regs[3]);
- printk("$4 : %08lx %08lx %08lx %08lx\n",
- regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
- printk("$8 : %08lx %08lx %08lx %08lx\n",
- regs->regs[8], regs->regs[9], regs->regs[10], regs->regs[11]);
- printk("$12: %08lx %08lx %08lx %08lx\n",
- regs->regs[12], regs->regs[13], regs->regs[14], regs->regs[15]);
- printk("$16: %08lx %08lx %08lx %08lx\n",
- regs->regs[16], regs->regs[17], regs->regs[18], regs->regs[19]);
- printk("$20: %08lx %08lx %08lx %08lx\n",
- regs->regs[20], regs->regs[21], regs->regs[22], regs->regs[23]);
- printk("$24: %08lx %08lx\n",
- regs->regs[24], regs->regs[25]);
- printk("$28: %08lx %08lx %08lx %08lx\n",
- regs->regs[28], regs->regs[29], regs->regs[30], regs->regs[31]);
-
- /* Saved cp0 registers. */
- printk("epc : %08lx %s\nStatus: %08lx\nCause : %08lx\n",
- regs->cp0_epc, print_tainted(), regs->cp0_status, regs->cp0_cause);
-}
-
-void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
- unsigned long entryhi, unsigned long pagemask)
-{
- unsigned long flags;
- unsigned long wired;
- unsigned long old_pagemask;
- unsigned long old_ctx;
-
- __save_and_cli(flags);
- /* Save old context and create impossible VPN2 value */
- old_ctx = (get_entryhi() & 0xff);
- old_pagemask = get_pagemask();
- wired = get_wired();
- set_wired (wired + 1);
- set_index (wired);
- BARRIER;
- set_pagemask (pagemask);
- set_entryhi(entryhi);
- set_entrylo0(entrylo0);
- set_entrylo1(entrylo1);
- BARRIER;
- tlb_write_indexed();
- BARRIER;
-
- set_entryhi(old_ctx);
- BARRIER;
- set_pagemask (old_pagemask);
- flush_tlb_all();
- __restore_flags(flags);
-}
-
-/* Detect and size the various r4k caches. */
-static void __init probe_icache(unsigned long config)
-{
- switch (mips_cpu.cputype) {
- case CPU_VR41XX:
- icache_size = 1 << (10 + ((config >> 9) & 7));
- break;
- default:
- icache_size = 1 << (12 + ((config >> 9) & 7));
- break;
- }
- ic_lsize = 16 << ((config >> 5) & 1);
-
- printk("Primary instruction cache %dkb, linesize %d bytes.\n",
- icache_size >> 10, ic_lsize);
-}
-
-static void __init probe_dcache(unsigned long config)
-{
- switch (mips_cpu.cputype) {
- case CPU_VR41XX:
- dcache_size = 1 << (10 + ((config >> 6) & 7));
- break;
- default:
- dcache_size = 1 << (12 + ((config >> 6) & 7));
- break;
- }
- dc_lsize = 16 << ((config >> 4) & 1);
-
- printk("Primary data cache %dkb, linesize %d bytes.\n",
- dcache_size >> 10, dc_lsize);
-}
-
-
-/* If you even _breathe_ on this function, look at the gcc output
- * and make sure it does not pop things on and off the stack for
- * the cache sizing loop that executes in KSEG1 space or else
- * you will crash and burn badly. You have been warned.
- */
-static int __init probe_scache(unsigned long config)
-{
- extern unsigned long stext;
- unsigned long flags, addr, begin, end, pow2;
- int tmp;
-
- tmp = ((config >> 17) & 1);
- if(tmp)
- return 0;
- tmp = ((config >> 22) & 3);
- switch(tmp) {
- case 0:
- sc_lsize = 16;
- break;
- case 1:
- sc_lsize = 32;
- break;
- case 2:
- sc_lsize = 64;
- break;
- case 3:
- sc_lsize = 128;
- break;
- }
-
- begin = (unsigned long) &stext;
- begin &= ~((4 * 1024 * 1024) - 1);
- end = begin + (4 * 1024 * 1024);
-
- /* This is such a bitch, you'd think they would make it
- * easy to do this. Away you daemons of stupidity!
- */
- __save_and_cli(flags);
-
- /* Fill each size-multiple cache line with a valid tag. */
- pow2 = (64 * 1024);
- for(addr = begin; addr < end; addr = (begin + pow2)) {
- unsigned long *p = (unsigned long *) addr;
- __asm__ __volatile__("nop" : : "r" (*p)); /* whee... */
- pow2 <<= 1;
- }
-
- /* Load first line with zero (therefore invalid) tag. */
- set_taglo(0);
- set_taghi(0);
- __asm__ __volatile__("nop; nop; nop; nop;"); /* avoid the hazard */
- __asm__ __volatile__("\n\t.set noreorder\n\t"
- ".set mips3\n\t"
- "cache 8, (%0)\n\t"
- ".set mips0\n\t"
- ".set reorder\n\t" : : "r" (begin));
- __asm__ __volatile__("\n\t.set noreorder\n\t"
- ".set mips3\n\t"
- "cache 9, (%0)\n\t"
- ".set mips0\n\t"
- ".set reorder\n\t" : : "r" (begin));
- __asm__ __volatile__("\n\t.set noreorder\n\t"
- ".set mips3\n\t"
- "cache 11, (%0)\n\t"
- ".set mips0\n\t"
- ".set reorder\n\t" : : "r" (begin));
-
- /* Now search for the wrap around point. */
- pow2 = (128 * 1024);
- tmp = 0;
- for(addr = (begin + (128 * 1024)); addr < (end); addr = (begin + pow2)) {
- __asm__ __volatile__("\n\t.set noreorder\n\t"
- ".set mips3\n\t"
- "cache 7, (%0)\n\t"
- ".set mips0\n\t"
- ".set reorder\n\t" : : "r" (addr));
- __asm__ __volatile__("nop; nop; nop; nop;"); /* hazard... */
- if(!get_taglo())
- break;
- pow2 <<= 1;
- }
- __restore_flags(flags);
- addr -= begin;
- printk("Secondary cache sized at %dK linesize %d bytes.\n",
- (int) (addr >> 10), sc_lsize);
- scache_size = addr;
- return 1;
-}
-
-static void __init setup_noscache_funcs(void)
-{
- unsigned int prid;
-
- switch(dc_lsize) {
- case 16:
- _clear_page = r4k_clear_page_d16;
- _copy_page = r4k_copy_page_d16;
- _flush_cache_all = r4k_flush_cache_all_d16i16;
- _flush_cache_mm = r4k_flush_cache_mm_d16i16;
- _flush_cache_range = r4k_flush_cache_range_d16i16;
- _flush_cache_page = r4k_flush_cache_page_d16i16;
- _flush_page_to_ram = r4k_flush_page_to_ram_d16;
- break;
- case 32:
- prid = read_32bit_cp0_register(CP0_PRID) & 0xfff0;
- if (prid == 0x2010) { /* R4600 V1.7 */
- _clear_page = r4k_clear_page_r4600_v1;
- _copy_page = r4k_copy_page_r4600_v1;
- _flush_page_to_ram = r4k_flush_page_to_ram_d32_r4600;
- } else if (prid == 0x2020) { /* R4600 V2.0 */
- _clear_page = r4k_clear_page_r4600_v2;
- _copy_page = r4k_copy_page_r4600_v2;
- _flush_page_to_ram = r4k_flush_page_to_ram_d32;
- } else {
- _clear_page = r4k_clear_page_d32;
- _copy_page = r4k_copy_page_d32;
- _flush_page_to_ram = r4k_flush_page_to_ram_d32;
- }
- _flush_cache_all = r4k_flush_cache_all_d32i32;
- _flush_cache_mm = r4k_flush_cache_mm_d32i32;
- _flush_cache_range = r4k_flush_cache_range_d32i32;
- _flush_cache_page = r4k_flush_cache_page_d32i32;
- break;
- }
- ___flush_cache_all = _flush_cache_all;
-
- _flush_icache_page = r4k_flush_icache_page_p;
-
- _dma_cache_wback_inv = r4k_dma_cache_wback_inv_pc;
- _dma_cache_wback = r4k_dma_cache_wback;
- _dma_cache_inv = r4k_dma_cache_inv_pc;
-}
-
-static void __init setup_scache_funcs(void)
-{
- switch(sc_lsize) {
- case 16:
- switch(dc_lsize) {
- case 16:
- _flush_cache_all = r4k_flush_cache_all_s16d16i16;
- _flush_cache_mm = r4k_flush_cache_mm_s16d16i16;
- _flush_cache_range = r4k_flush_cache_range_s16d16i16;
- _flush_cache_page = r4k_flush_cache_page_s16d16i16;
- break;
- case 32:
- panic("Invalid cache configuration detected");
- };
- _flush_page_to_ram = r4k_flush_page_to_ram_s16;
- _clear_page = r4k_clear_page_s16;
- _copy_page = r4k_copy_page_s16;
- break;
- case 32:
- switch(dc_lsize) {
- case 16:
- _flush_cache_all = r4k_flush_cache_all_s32d16i16;
- _flush_cache_mm = r4k_flush_cache_mm_s32d16i16;
- _flush_cache_range = r4k_flush_cache_range_s32d16i16;
- _flush_cache_page = r4k_flush_cache_page_s32d16i16;
- break;
- case 32:
- _flush_cache_all = r4k_flush_cache_all_s32d32i32;
- _flush_cache_mm = r4k_flush_cache_mm_s32d32i32;
- _flush_cache_range = r4k_flush_cache_range_s32d32i32;
- _flush_cache_page = r4k_flush_cache_page_s32d32i32;
- break;
- };
- _flush_page_to_ram = r4k_flush_page_to_ram_s32;
- _clear_page = r4k_clear_page_s32;
- _copy_page = r4k_copy_page_s32;
- break;
- case 64:
- switch(dc_lsize) {
- case 16:
- _flush_cache_all = r4k_flush_cache_all_s64d16i16;
- _flush_cache_mm = r4k_flush_cache_mm_s64d16i16;
- _flush_cache_range = r4k_flush_cache_range_s64d16i16;
- _flush_cache_page = r4k_flush_cache_page_s64d16i16;
- break;
- case 32:
- _flush_cache_all = r4k_flush_cache_all_s64d32i32;
- _flush_cache_mm = r4k_flush_cache_mm_s64d32i32;
- _flush_cache_range = r4k_flush_cache_range_s64d32i32;
- _flush_cache_page = r4k_flush_cache_page_s64d32i32;
- break;
- };
- _flush_page_to_ram = r4k_flush_page_to_ram_s64;
- _clear_page = r4k_clear_page_s64;
- _copy_page = r4k_copy_page_s64;
- break;
- case 128:
- switch(dc_lsize) {
- case 16:
- _flush_cache_all = r4k_flush_cache_all_s128d16i16;
- _flush_cache_mm = r4k_flush_cache_mm_s128d16i16;
- _flush_cache_range = r4k_flush_cache_range_s128d16i16;
- _flush_cache_page = r4k_flush_cache_page_s128d16i16;
- break;
- case 32:
- _flush_cache_all = r4k_flush_cache_all_s128d32i32;
- _flush_cache_mm = r4k_flush_cache_mm_s128d32i32;
- _flush_cache_range = r4k_flush_cache_range_s128d32i32;
- _flush_cache_page = r4k_flush_cache_page_s128d32i32;
- break;
- };
- _flush_page_to_ram = r4k_flush_page_to_ram_s128;
- _clear_page = r4k_clear_page_s128;
- _copy_page = r4k_copy_page_s128;
- break;
- }
- ___flush_cache_all = _flush_cache_all;
- _flush_icache_page = r4k_flush_icache_page_s;
- _dma_cache_wback_inv = r4k_dma_cache_wback_inv_sc;
- _dma_cache_wback = r4k_dma_cache_wback;
- _dma_cache_inv = r4k_dma_cache_inv_sc;
-}
-
-typedef int (*probe_func_t)(unsigned long);
-
-static inline void __init setup_scache(unsigned int config)
-{
- probe_func_t probe_scache_kseg1;
- int sc_present = 0;
-
- /* Maybe the cpu knows about a l2 cache? */
- probe_scache_kseg1 = (probe_func_t) (KSEG1ADDR(&probe_scache));
- sc_present = probe_scache_kseg1(config);
-
- if (sc_present) {
- setup_scache_funcs();
- return;
- }
-
- setup_noscache_funcs();
-}
-
-void __init ld_mmu_r4xx0(void)
-{
- unsigned long config = read_32bit_cp0_register(CP0_CONFIG);
-
- printk("CPU revision is: %08x\n", read_32bit_cp0_register(CP0_PRID));
-
-#ifdef CONFIG_MIPS_UNCACHED
- change_cp0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
-#else
- change_cp0_config(CONF_CM_CMASK, CONF_CM_CACHABLE_NONCOHERENT);
-#endif
-
- probe_icache(config);
- probe_dcache(config);
- setup_scache(config);
-
- switch(mips_cpu.cputype) {
- case CPU_R4600: /* QED style two way caches? */
- case CPU_R4700:
- case CPU_R5000:
- case CPU_NEVADA:
- _flush_cache_page = r4k_flush_cache_page_d32i32_r4600;
- }
-
- _flush_cache_sigtramp = r4k_flush_cache_sigtramp;
- _flush_icache_range = r4k_flush_icache_range; /* Ouch */
- if ((read_32bit_cp0_register(CP0_PRID) & 0xfff0) == 0x2020) {
- _flush_cache_sigtramp = r4600v20k_flush_cache_sigtramp;
- }
-
- __flush_cache_all();
- write_32bit_cp0_register(CP0_WIRED, 0);
-
- /*
- * You should never change this register:
- * - On R4600 1.7 the tlbp never hits for pages smaller than
- * the value in the c0_pagemask register.
- * - The entire mm handling assumes the c0_pagemask register to
- * be set for 4kb pages.
- */
- set_pagemask(PM_4K);
- flush_tlb_all();
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)