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From 3592cd3db82e5b010df590079f1e310b5d317248 Mon Sep 17 00:00:00 2001
From: Kurt Mahan <kmahan@freescale.com>
Date: Mon, 3 Dec 2007 23:03:07 -0700
Subject: [PATCH] Rewrite Coldfire cache code.
LTIBName: mcfv4e-cache-base-update
Signed-off-by: Kurt Mahan <kmahan@freescale.com>
---
arch/m68k/coldfire/cache.c | 196 +-------------
arch/m68k/coldfire/head.S | 6 +-
arch/m68k/coldfire/signal.c | 4 +-
arch/m68k/kernel/sys_m68k.c | 16 ++
arch/m68k/mm/cache.c | 31 +---
arch/m68k/mm/memory.c | 76 +-----
include/asm-m68k/cf_cacheflush.h | 525 +++++++++++++++++++++++++++++---------
include/asm-m68k/cfcache.h | 95 ++++----
8 files changed, 495 insertions(+), 454 deletions(-)
--- a/arch/m68k/coldfire/cache.c
+++ b/arch/m68k/coldfire/cache.c
@@ -1,7 +1,8 @@
/*
- * linux/arch/m68k/coldifre/cache.c
+ * linux/arch/m68k/coldfire/cache.c
*
* Matt Waddel Matt.Waddel@freescale.com
+ * Kurt Mahan kmahan@freescale.com
* Copyright Freescale Semiconductor, Inc. 2007
*
* This program is free software; you can redistribute it and/or modify
@@ -15,191 +16,13 @@
#include <asm/coldfire.h>
#include <asm/system.h>
-#define _DCACHE_SIZE (2*16384)
-#define _ICACHE_SIZE (2*16384)
-
-#define _SET_SHIFT 4
-
-/*
- * Masks for cache sizes. Programming note: because the set size is a
- * power of two, the mask is also the last address in the set.
- */
-
-#define _DCACHE_SET_MASK ((_DCACHE_SIZE/64-1)<<_SET_SHIFT)
-#define _ICACHE_SET_MASK ((_ICACHE_SIZE/64-1)<<_SET_SHIFT)
-#define LAST_DCACHE_ADDR _DCACHE_SET_MASK
-#define LAST_ICACHE_ADDR _ICACHE_SET_MASK
-
-/************************************************************
- * Routine to cleanly flush the cache, pushing all lines and
- * invalidating them.
- *
- * The is the flash-resident version, used after copying the .text
- * segment from flash to ram.
- *************************************************************/
-void FLASHDcacheFlushInvalidate(void)
- __attribute__ ((section (".text_loader")));
-
-void FLASHDcacheFlushInvalidate()
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = 0;
- end_set = (unsigned long)LAST_DCACHE_ADDR;
-
- for (set = start_set; set < end_set; set += (0x10 - 3))
- asm volatile("cpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)" : : "a" (set));
-}
-
-/************************************************************
- * Routine to cleanly flush the cache, pushing all lines and
- * invalidating them.
- *
- *************************************************************/
-void DcacheFlushInvalidate()
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = 0;
- end_set = (unsigned long)LAST_DCACHE_ADDR;
-
- for (set = start_set; set < end_set; set += (0x10 - 3))
- asm volatile("cpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)" : : "a" (set));
-}
-
-
-
-/******************************************************************************
- * Routine to cleanly flush the a block of cache, pushing all relevant lines
- * and invalidating them.
- *
- ******************************************************************************/
-void DcacheFlushInvalidateCacheBlock(void *start, unsigned long size)
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- /* if size is bigger than the cache can store
- * set the size to the maximum amount
- */
-
- if (size > LAST_DCACHE_ADDR)
- size = LAST_DCACHE_ADDR;
-
- start_set = ((unsigned long)start) & _DCACHE_SET_MASK;
- end_set = ((unsigned long)(start+size-1)) & _DCACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_DCACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%dc,(%0)" : : "a" (set));
-}
-
-
-void IcacheInvalidateCacheBlock(void *start, unsigned long size)
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- /* if size is bigger than the cache can store
- * set the size to the maximum ammount
- */
-
- if (size > LAST_ICACHE_ADDR)
- size = LAST_ICACHE_ADDR;
-
- start_set = ((unsigned long)start) & _ICACHE_SET_MASK;
- end_set = ((unsigned long)(start+size-1)) & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
-}
-
-
-/********************************************************************
- * Disable the data cache completely
- ********************************************************************/
-void DcacheDisable(void)
-{
- int newValue;
- unsigned long flags;
-
- local_save_flags(flags);
- local_irq_disable();
-
- DcacheFlushInvalidate(); /* begin by flushing the cache */
- newValue = CACHE_DISABLE_MODE; /* disable it */
- cacr_set(newValue);
- local_irq_restore(flags);
-}
-
-/********************************************************************
- * Unconditionally enable the data cache
- ********************************************************************/
-void DcacheEnable(void)
-{
- cacr_set(CACHE_INITIAL_MODE);
-}
-
-
+/* Cache Control Reg shadow reg */
unsigned long shadow_cacr;
+/**
+ * cacr_set - Set the Cache Control Register
+ * @x Value to set
+ */
void cacr_set(unsigned long x)
{
shadow_cacr = x;
@@ -209,6 +32,11 @@ void cacr_set(unsigned long x)
: "r" (shadow_cacr));
}
+/**
+ * cacr_get - Get the current value of the Cache Control Register
+ *
+ * @return CACR value
+ */
unsigned long cacr_get(void)
{
return shadow_cacr;
--- a/arch/m68k/coldfire/head.S
+++ b/arch/m68k/coldfire/head.S
@@ -244,7 +244,7 @@ ENTRY(__start)
/* Setup initial stack pointer */
movel #0x40001000,%sp
-/* Clear usp */
+/* Setup usp */
subl %a0,%a0
movel %a0,%usp
@@ -252,6 +252,10 @@ ENTRY(__start)
movec %d0, %rambar1
movew #0x2700,%sr
+/* reset cache */
+ movel #(CF_CACR_ICINVA + CF_CACR_DCINVA),%d0
+ movecl %d0,%cacr
+
movel #(MMU_BASE+1),%d0
movecl %d0,%mmubar
movel #MMUOR_CA,%a0 /* Clear tlb entries */
--- a/arch/m68k/coldfire/signal.c
+++ b/arch/m68k/coldfire/signal.c
@@ -37,6 +37,7 @@
#include <asm/cf_pgtable.h>
#include <asm/traps.h>
#include <asm/ucontext.h>
+#include <asm/cacheflush.h>
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
@@ -605,10 +606,9 @@ static inline int rt_setup_ucontext(stru
return err;
}
-extern void IcacheInvalidateCacheBlock(void *, unsigned long);
static inline void push_cache(unsigned long vaddr)
{
- IcacheInvalidateCacheBlock((void *)vaddr, 8);
+ cf_cache_push(__pa(vaddr), 8);
}
static inline void __user *
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -29,6 +29,9 @@
#include <asm/traps.h>
#include <asm/page.h>
#include <asm/unistd.h>
+#ifdef CONFIG_COLDFIRE
+#include <asm/cacheflush.h>
+#endif
/*
* sys_pipe() is the normal C calling standard for creating
@@ -257,6 +260,7 @@ asmlinkage int sys_ipc (uint call, int f
return -EINVAL;
}
+#ifndef CONFIG_COLDFIRE
/* Convert virtual (user) address VADDR to physical address PADDR */
#define virt_to_phys_040(vaddr) \
({ \
@@ -580,6 +584,7 @@ cache_flush_060 (unsigned long addr, int
}
return 0;
}
+#endif /* CONFIG_COLDFIRE */
/* sys_cacheflush -- flush (part of) the processor cache. */
asmlinkage int
@@ -612,6 +617,7 @@ sys_cacheflush (unsigned long addr, int
goto out;
}
+#ifndef CONFIG_COLDFIRE
if (CPU_IS_020_OR_030) {
if (scope == FLUSH_SCOPE_LINE && len < 256) {
unsigned long cacr;
@@ -656,6 +662,16 @@ sys_cacheflush (unsigned long addr, int
ret = cache_flush_060 (addr, scope, cache, len);
}
}
+#else /* CONFIG_COLDFIRE */
+ if ((cache & FLUSH_CACHE_INSN) && (cache & FLUSH_CACHE_DATA))
+ flush_bcache();
+ else if (cache & FLUSH_CACHE_INSN)
+ flush_icache();
+ else
+ flush_dcache();
+
+ ret = 0;
+#endif /* CONFIG_COLDFIRE */
out:
unlock_kernel();
return ret;
--- a/arch/m68k/mm/cache.c
+++ b/arch/m68k/mm/cache.c
@@ -81,36 +81,7 @@ static unsigned long virt_to_phys_slow(u
void flush_icache_range(unsigned long address, unsigned long endaddr)
{
#ifdef CONFIG_COLDFIRE
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = address & _ICACHE_SET_MASK;
- end_set = endaddr & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile ("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile ("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
-
+ cf_icache_flush_range(address, endaddr);
#else /* !CONFIG_COLDFIRE */
if (CPU_IS_040_OR_060) {
--- a/arch/m68k/mm/memory.c
+++ b/arch/m68k/mm/memory.c
@@ -127,6 +127,7 @@ int free_pointer_table (pmd_t *ptable)
return 0;
}
+#ifndef CONFIG_COLDFIRE
/* invalidate page in both caches */
static inline void clear040(unsigned long paddr)
{
@@ -173,6 +174,7 @@ static inline void pushcl040(unsigned lo
clear040(paddr);
local_irq_restore(flags);
}
+#endif /* CONFIG_COLDFIRE */
/*
* 040: Hit every page containing an address in the range paddr..paddr+len-1.
@@ -203,38 +205,10 @@ static inline void pushcl040(unsigned lo
void cache_clear (unsigned long paddr, int len)
{
- if (CPU_IS_CFV4E) {
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = paddr & _ICACHE_SET_MASK;
- end_set = (paddr+len-1) & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-
- } else if (CPU_IS_040_OR_060) {
+#ifdef CONFIG_COLDFIRE
+ cf_cache_clear(paddr, len);
+#else
+ if (CPU_IS_040_OR_060) {
int tmp;
/*
@@ -268,6 +242,7 @@ void cache_clear (unsigned long paddr, i
if(mach_l2_flush)
mach_l2_flush(0);
#endif
+#endif /* CONFIG_COLDFIRE */
}
EXPORT_SYMBOL(cache_clear);
@@ -281,38 +256,10 @@ EXPORT_SYMBOL(cache_clear);
void cache_push (unsigned long paddr, int len)
{
- if (CPU_IS_CFV4E) {
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = paddr & _ICACHE_SET_MASK;
- end_set = (paddr+len-1) & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-
- } else if (CPU_IS_040_OR_060) {
+#ifdef CONFIG_COLDFIRE
+ cf_cache_push(paddr, len);
+#else
+ if (CPU_IS_040_OR_060) {
int tmp = PAGE_SIZE;
/*
@@ -352,6 +299,7 @@ void cache_push (unsigned long paddr, in
if(mach_l2_flush)
mach_l2_flush(1);
#endif
+#endif /* CONFIG_COLDFIRE */
}
EXPORT_SYMBOL(cache_push);
--- a/include/asm-m68k/cf_cacheflush.h
+++ b/include/asm-m68k/cf_cacheflush.h
@@ -1,160 +1,439 @@
+/*
+ * include/asm-m68k/cf_cacheflush.h - Coldfire Cache
+ *
+ * Based on include/asm-m68k/cacheflush.h
+ *
+ * Coldfire pieces by:
+ * Kurt Mahan kmahan@freescale.com
+ *
+ * Copyright Freescale Semiconductor, Inc. 2007
+ *
+ * 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 of the License, or (at your
+ * option) any later version.
+ */
#ifndef M68K_CF_CACHEFLUSH_H
#define M68K_CF_CACHEFLUSH_H
#include <asm/cfcache.h>
/*
- * Cache handling functions
+ * Coldfire Cache Model
+ *
+ * The Coldfire processors use a Harvard architecture cache configured
+ * as four-way set associative. The cache does not implement bus snooping
+ * so cache coherency with other masters must be maintained in software.
+ *
+ * The cache is managed via the CPUSHL instruction in conjunction with
+ * bits set in the CACR (cache control register). Currently the code
+ * uses the CPUSHL enhancement which adds the ability to
+ * invalidate/clear/push a cacheline by physical address. This feature
+ * is designated in the Hardware Configuration Register [D1-CPES].
+ *
+ * CACR Bits:
+ * DPI[28] cpushl invalidate disable for d-cache
+ * IDPI[12] cpushl invalidate disable for i-cache
+ * SPA[14] cpushl search by physical address
+ * IVO[20] cpushl invalidate only
+ *
+ * Random Terminology:
+ * * invalidate = reset the cache line's valid bit
+ * * push = generate a line-sized store of the data if its contents are marked
+ * as modifed (the modified flag is cleared after the store)
+ * * clear = push + invalidate
*/
-#define flush_icache() \
-({ \
- unsigned long set; \
- unsigned long start_set; \
- unsigned long end_set; \
- \
- start_set = 0; \
- end_set = (unsigned long)LAST_DCACHE_ADDR; \
- \
- for (set = start_set; set <= end_set; set += (0x10 - 3)) \
- asm volatile("cpushl %%ic,(%0)\n" \
- "\taddq%.l #1,%0\n" \
- "\tcpushl %%ic,(%0)\n" \
- "\taddq%.l #1,%0\n" \
- "\tcpushl %%ic,(%0)\n" \
- "\taddq%.l #1,%0\n" \
- "\tcpushl %%ic,(%0)" : : "a" (set)); \
-})
+/**
+ * flush_icache - Flush all of the instruction cache
+ */
+static inline void flush_icache(void)
+{
+ asm volatile("nop\n"
+ "moveq%.l #0,%%d0\n"
+ "moveq%.l #0,%%d1\n"
+ "move%.l %%d0,%%a0\n"
+ "1:\n"
+ "cpushl %%ic,(%%a0)\n"
+ "add%.l #0x0010,%%a0\n"
+ "addq%.l #1,%%d1\n"
+ "cmpi%.l %0,%%d1\n"
+ "bne 1b\n"
+ "moveq%.l #0,%%d1\n"
+ "addq%.l #1,%%d0\n"
+ "move%.l %%d0,%%a0\n"
+ "cmpi%.l #4,%%d0\n"
+ "bne 1b\n"
+ : : "i" (CACHE_SETS)
+ : "a0", "d0", "d1");
+}
-/*
- * invalidate the cache for the specified memory range.
- * It starts at the physical address specified for
- * the given number of bytes.
+/**
+ * flush_dcache - Flush all of the data cache
*/
-extern void cache_clear(unsigned long paddr, int len);
-/*
- * push any dirty cache in the specified memory range.
- * It starts at the physical address specified for
- * the given number of bytes.
+static inline void flush_dcache(void)
+{
+ asm volatile("nop\n"
+ "moveq%.l #0,%%d0\n"
+ "moveq%.l #0,%%d1\n"
+ "move%.l %%d0,%%a0\n"
+ "1:\n"
+ "cpushl %%dc,(%%a0)\n"
+ "add%.l #0x0010,%%a0\n"
+ "addq%.l #1,%%d1\n"
+ "cmpi%.l %0,%%d1\n"
+ "bne 1b\n"
+ "moveq%.l #0,%%d1\n"
+ "addq%.l #1,%%d0\n"
+ "move%.l %%d0,%%a0\n"
+ "cmpi%.l #4,%%d0\n"
+ "bne 1b\n"
+ : : "i" (CACHE_SETS)
+ : "a0", "d0", "d1");
+}
+
+/**
+ * flush_bcache - Flush all of both caches
*/
-extern void cache_push(unsigned long paddr, int len);
+static inline void flush_bcache(void)
+{
+ asm volatile("nop\n"
+ "moveq%.l #0,%%d0\n"
+ "moveq%.l #0,%%d1\n"
+ "move%.l %%d0,%%a0\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "add%.l #0x0010,%%a0\n"
+ "addq%.l #1,%%d1\n"
+ "cmpi%.l %0,%%d1\n"
+ "bne 1b\n"
+ "moveq%.l #0,%%d1\n"
+ "addq%.l #1,%%d0\n"
+ "move%.l %%d0,%%a0\n"
+ "cmpi%.l #4,%%d0\n"
+ "bne 1b\n"
+ : : "i" (CACHE_SETS)
+ : "a0", "d0", "d1");
+}
-/*
- * push and invalidate pages in the specified user virtual
- * memory range.
+/**
+ * cf_cache_clear - invalidate cache
+ * @paddr: starting physical address
+ * @len: number of bytes
+ *
+ * Invalidate cache lines starting at paddr for len bytes.
+ * Those lines are not pushed.
+ */
+static inline void cf_cache_clear(unsigned long paddr, int len)
+{
+ /* number of lines */
+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
+
+ /* align on set boundary */
+ paddr &= 0xfffffff0;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%d0\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "subq%.l #1,%%d0\n"
+ "bne%.b 1b\n"
+ "movec %2,%%cacr\n"
+ : : "a" (paddr), "r" (len),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA+CF_CACR_IVO)
+ : "a0", "d0");
+}
+
+/**
+ * cf_cache_push - Push dirty cache out with no invalidate
+ * @paddr: starting physical address
+ * @len: number of bytes
+ *
+ * Push the any dirty lines starting at paddr for len bytes.
+ * Those lines are not invalidated.
+ */
+static inline void cf_cache_push(unsigned long paddr, int len)
+{
+ /* number of lines */
+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
+
+ /* align on set boundary */
+ paddr &= 0xfffffff0;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%d0\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "subq%.l #1,%%d0\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : : "a" (paddr), "r" (len),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA+CF_CACR_DPI+CF_CACR_IDPI)
+ : "a0", "d0");
+}
+
+/**
+ * cf_cache_flush - Push dirty cache out and invalidate
+ * @paddr: starting physical address
+ * @len: number of bytes
+ *
+ * Push the any dirty lines starting at paddr for len bytes and
+ * invalidate those lines.
+ */
+static inline void cf_cache_flush(unsigned long paddr, int len)
+{
+ /* number of lines */
+ len = (len + (CACHE_LINE_SIZE-1)) / CACHE_LINE_SIZE;
+
+ /* align on set boundary */
+ paddr &= 0xfffffff0;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%d0\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "subq%.l #1,%%d0\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : : "a" (paddr), "r" (len),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA)
+ : "a0", "d0");
+}
+
+/**
+ * cf_cache_flush_range - Push dirty data/inst cache in range out and invalidate
+ * @vstart - starting virtual address
+ * @vend: ending virtual address
+ *
+ * Push the any dirty data/instr lines starting at paddr for len bytes and
+ * invalidate those lines.
+ */
+static inline void cf_cache_flush_range(unsigned long vstart, unsigned long vend)
+{
+ int len;
+
+ /* align on set boundary */
+ vstart &= 0xfffffff0;
+ vend = PAGE_ALIGN((vend + (CACHE_LINE_SIZE-1))) & 0xfffffff0;
+ len = vend - vstart;
+ vstart = __pa(vstart);
+ vend = vstart + len;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%a1\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "cmpa%.l %%a0,%%a1\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : /* no return */
+ : "a" (vstart), "a" (vend),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA)
+ : "a0", "a1", "d0");
+}
+
+/**
+ * cf_dcache_flush_range - Push dirty data cache in range out and invalidate
+ * @vstart - starting virtual address
+ * @vend: ending virtual address
+ *
+ * Push the any dirty data lines starting at paddr for len bytes and
+ * invalidate those lines.
+ */
+static inline void cf_dcache_flush_range(unsigned long vstart, unsigned long vend)
+{
+ /* align on set boundary */
+ vstart &= 0xfffffff0;
+ vend = (vend + (CACHE_LINE_SIZE-1)) & 0xfffffff0;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%a1\n"
+ "1:\n"
+ "cpushl %%dc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "cmpa%.l %%a0,%%a1\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : /* no return */
+ : "a" (__pa(vstart)), "a" (__pa(vend)),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA)
+ : "a0", "a1", "d0");
+}
+
+/**
+ * cf_icache_flush_range - Push dirty inst cache in range out and invalidate
+ * @vstart - starting virtual address
+ * @vend: ending virtual address
+ *
+ * Push the any dirty instr lines starting at paddr for len bytes and
+ * invalidate those lines. This should just be an invalidate since you
+ * shouldn't be able to have dirty instruction cache.
*/
-extern void cache_push_v(unsigned long vaddr, int len);
+static inline void cf_icache_flush_range(unsigned long vstart, unsigned long vend)
+{
+ /* align on set boundary */
+ vstart &= 0xfffffff0;
+ vend = (vend + (CACHE_LINE_SIZE-1)) & 0xfffffff0;
+
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%a0\n"
+ "move%.l %1,%%a1\n"
+ "1:\n"
+ "cpushl %%ic,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "cmpa%.l %%a0,%%a1\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : /* no return */
+ : "a" (__pa(vstart)), "a" (__pa(vend)),
+ "r" (shadow_cacr),
+ "i" (CF_CACR_SPA)
+ : "a0", "a1", "d0");
+}
-/* This is needed whenever the virtual mapping of the current
- process changes. */
+/**
+ * flush_cache_mm - Flush an mm_struct
+ * @mm: mm_struct to flush
+ */
+static inline void flush_cache_mm(struct mm_struct *mm)
+{
+ if (mm == current->mm)
+ flush_bcache();
+}
+#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-#define flush_cache_all() do { } while (0)
-#define flush_cache_mm(mm) do { } while (0)
-#define flush_cache_range(mm, a, b) do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
-
-#define flush_dcache_range(paddr, len) do { } while (0)
-
-/* Push the page at kernel virtual address and clear the icache */
-/* use cpush %bc instead of cpush %dc, cinv %ic */
-#define flush_page_to_ram(page) __flush_page_to_ram((void *) page_address(page))
-extern inline void __flush_page_to_ram(void *address)
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
- unsigned long addr = (unsigned long) address;
-
- addr &= ~(PAGE_SIZE - 1); /* round down to page start address */
-
- start_set = addr & _ICACHE_SET_MASK;
- end_set = (addr + PAGE_SIZE-1) & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%bc,(%0)" : : "a" (set));
-}
-
-#define flush_dcache_page(page) do { } while (0)
-#define flush_icache_page(vma, pg) do { } while (0)
-#define flush_icache_user_range(adr, len) do { } while (0)
-/* NL */
-#define flush_icache_user_page(vma, page, addr, len) do { } while (0)
-
-/* Push n pages at kernel virtual address and clear the icache */
-/* use cpush %bc instead of cpush %dc, cinv %ic */
-extern inline void flush_icache_range(unsigned long address,
- unsigned long endaddr)
-{
- unsigned long set;
- unsigned long start_set;
- unsigned long end_set;
-
- start_set = address & _ICACHE_SET_MASK;
- end_set = endaddr & _ICACHE_SET_MASK;
-
- if (start_set > end_set) {
- /* from the begining to the lowest address */
- for (set = 0; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
-
- /* next loop will finish the cache ie pass the hole */
- end_set = LAST_ICACHE_ADDR;
- }
- for (set = start_set; set <= end_set; set += (0x10 - 3))
- asm volatile("cpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)\n"
- "\taddq%.l #1,%0\n"
- "\tcpushl %%ic,(%0)" : : "a" (set));
+/**
+ * flush_cache_range - Flush a cache range
+ * @vma: vma struct
+ * @start: Starting address
+ * @end: Ending address
+ *
+ * flush_cache_range must be a macro to avoid a dependency on
+ * linux/mm.h which includes this file.
+ */
+static inline void flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end)
+{
+ if (vma->vm_mm == current->mm)
+ cf_cache_flush_range(start, end);
}
+/**
+ * flush_cache_page - Flush a page of the cache
+ * @vma: vma struct
+ * @vmaddr:
+ * @pfn: page numer
+ *
+ * flush_cache_page must be a macro to avoid a dependency on
+ * linux/mm.h which includes this file.
+ */
+static inline void flush_cache_page(struct vm_area_struct *vma,
+ unsigned long vmaddr, unsigned long pfn)
+{
+ if (vma->vm_mm == current->mm)
+ cf_cache_flush_range(vmaddr, vmaddr+PAGE_SIZE);
+}
+
+/**
+ * __flush_page_to_ram - Push a page out of the cache
+ * @vaddr: Virtual address at start of page
+ *
+ * Push the page at kernel virtual address *vaddr* and clear
+ * the icache.
+ */
+static inline void __flush_page_to_ram(void *vaddr)
+{
+ asm volatile("nop\n"
+ "move%.l %2,%%d0\n"
+ "or%.l %3,%%d0\n"
+ "movec %%d0,%%cacr\n"
+ "move%.l %0,%%d0\n"
+ "and%.l #0xfffffff0,%%d0\n"
+ "move%.l %%d0,%%a0\n"
+ "move%.l %1,%%d0\n"
+ "1:\n"
+ "cpushl %%bc,(%%a0)\n"
+ "lea 0x10(%%a0),%%a0\n"
+ "subq%.l #1,%%d0\n"
+ "bne.b 1b\n"
+ "movec %2,%%cacr\n"
+ : : "a" (__pa(vaddr)), "i" (PAGE_SIZE / CACHE_LINE_SIZE),
+ "r" (shadow_cacr), "i" (CF_CACR_SPA)
+ : "a0", "d0");
+}
+
+/*
+ * Various defines for the kernel.
+ */
+
+extern void cache_clear(unsigned long paddr, int len);
+extern void cache_push(unsigned long paddr, int len);
+extern void flush_icache_range(unsigned long address, unsigned long endaddr);
+
+#define flush_cache_all() flush_bcache()
+#define flush_cache_vmap(start, end) flush_bcache()
+#define flush_cache_vunmap(start, end) flush_bcache()
+
+#define flush_dcache_range(vstart, vend) cf_dcache_flush_range(vstart, vend)
+#define flush_dcache_page(page) __flush_page_to_ram(page_address(page))
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+#define flush_icache_page(vma, page) __flush_page_to_ram(page_address(page))
+
+/**
+ * copy_to_user_page - Copy memory to user page
+ */
static inline void copy_to_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr,
void *dst, void *src, int len)
{
memcpy(dst, src, len);
- flush_icache_user_page(vma, page, vaddr, len);
+ cf_cache_flush(page_to_phys(page), PAGE_SIZE);
}
+
+/**
+ * copy_from_user_page - Copy memory from user page
+ */
static inline void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr,
void *dst, void *src, int len)
{
+ cf_cache_flush(page_to_phys(page), PAGE_SIZE);
memcpy(dst, src, len);
}
-#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-#define flush_cache_vmap(start, end) flush_cache_all()
-#define flush_cache_vunmap(start, end) flush_cache_all()
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
#endif /* M68K_CF_CACHEFLUSH_H */
--- a/include/asm-m68k/cfcache.h
+++ b/include/asm-m68k/cfcache.h
@@ -1,19 +1,32 @@
/*
- * include/asm-m68k/cfcache.h
+ * include/asm-m68k/cfcache.h - Coldfire Cache Controller
+ *
+ * Kurt Mahan kmahan@freescale.com
+ *
+ * Copyright Freescale Semiconductor, Inc. 2007
+ *
+ * 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 of the License, or (at your
+ * option) any later version.
*/
#ifndef CF_CFCACHE_H
#define CF_CFCACHE_H
+/*
+ * CACR Cache Control Register
+ */
#define CF_CACR_DEC (0x80000000) /* Data Cache Enable */
#define CF_CACR_DW (0x40000000) /* Data default Write-protect */
#define CF_CACR_DESB (0x20000000) /* Data Enable Store Buffer */
-#define CF_CACR_DDPI (0x10000000) /* Data Disable CPUSHL Invalidate */
+#define CF_CACR_DPI (0x10000000) /* Data Disable CPUSHL Invalidate */
#define CF_CACR_DHLCK (0x08000000) /* 1/2 Data Cache Lock Mode */
#define CF_CACR_DDCM_00 (0x00000000) /* Cacheable writethrough imprecise */
#define CF_CACR_DDCM_01 (0x02000000) /* Cacheable copyback */
#define CF_CACR_DDCM_10 (0x04000000) /* Noncacheable precise */
#define CF_CACR_DDCM_11 (0x06000000) /* Noncacheable imprecise */
#define CF_CACR_DCINVA (0x01000000) /* Data Cache Invalidate All */
+#define CF_CACR_DDSP (0x00800000) /* Data default supervisor-protect */
#define CF_CACR_IVO (0x00100000) /* Invalidate only */
#define CF_CACR_BEC (0x00080000) /* Branch Cache Enable */
#define CF_CACR_BCINVA (0x00040000) /* Branch Cache Invalidate All */
@@ -24,61 +37,43 @@
#define CF_CACR_IHLCK (0x00000800) /* 1/2 Instruction Cache Lock Mode */
#define CF_CACR_IDCM (0x00000400) /* Noncacheable Instr default mode */
#define CF_CACR_ICINVA (0x00000100) /* Instr Cache Invalidate All */
+#define CF_CACR_IDSP (0x00000080) /* Ins default supervisor-protect */
#define CF_CACR_EUSP (0x00000020) /* Switch stacks in user mode */
-#define DCACHE_LINE_SIZE 0x0010 /* bytes per line */
-#define DCACHE_WAY_SIZE 0x2000 /* words per cache block */
-#define CACHE_DISABLE_MODE (CF_CACR_DCINVA+CF_CACR_BCINVA+CF_CACR_ICINVA)
-#ifdef CONFIG_M5445X_DISABLE_CACHE
-/* disable cache for testing rev0 silicon */
-#define CACHE_INITIAL_MODE (CF_CACR_EUSP)
-#else
-#define CACHE_INITIAL_MODE (CF_CACR_DEC+CF_CACR_BEC+CF_CACR_IEC+CF_CACR_EUSP)
-#endif
-
-#define _DCACHE_SIZE (2*16384)
-#define _ICACHE_SIZE (2*16384)
-
-#define _SET_SHIFT 4
-
+#ifdef CONFIG_M54455
/*
- * Masks for cache sizes. Programming note: because the set size is a
- * power of two, the mask is also the last address in the set.
- * This may need to be #ifdef for other Coldfire processors.
+ * M5445x Cache Configuration
+ * - cache line size is 16 bytes
+ * - cache is 4-way set associative
+ * - each cache has 256 sets (64k / 16bytes / 4way)
+ * - I-Cache size is 16KB
+ * - D-Cache size is 16KB
*/
+#define ICACHE_SIZE 0x4000 /* instruction - 16k */
+#define DCACHE_SIZE 0x4000 /* data - 16k */
-#define _DCACHE_SET_MASK ((_DCACHE_SIZE/64-1)<<_SET_SHIFT)
-#define _ICACHE_SET_MASK ((_ICACHE_SIZE/64-1)<<_SET_SHIFT)
-#define LAST_DCACHE_ADDR _DCACHE_SET_MASK
-#define LAST_ICACHE_ADDR _ICACHE_SET_MASK
-
+#define CACHE_LINE_SIZE 0x0010 /* 16 bytes */
+#define CACHE_SETS 0x0100 /* 256 sets */
+#define CACHE_WAYS 0x0004 /* 4 way */
+
+#define CACHE_DISABLE_MODE (CF_CACR_DCINVA+ \
+ CF_CACR_BCINVA+ \
+ CF_CACR_ICINVA)
+
+#ifndef CONFIG_M5445X_DISABLE_CACHE
+#define CACHE_INITIAL_MODE (CF_CACR_DEC+ \
+ CF_CACR_BEC+ \
+ CF_CACR_IEC+ \
+ CF_CACR_EUSP)
+#else
+/* cache disabled for testing */
+#define CACHE_INITIAL_MODE (CF_CACR_EUSP)
+#endif /* CONFIG_M5445X_DISABLE_CACHE */
+#endif /* CONFIG_M54455 */
#ifndef __ASSEMBLY__
-extern void DcacheFlushInvalidate(void);
-
-extern void DcacheDisable(void);
-extern void DcacheEnable(void);
-
-/******************************************************************************/
-/*** Unimplemented Cache functionality ***/
-/******************************************************************************/
-#define preDcacheInvalidateBlockMark()
-#define postDcacheInvalidateBlockMark()
-#define DcacheZeroBlock(p, l) fast_bzero((char *)(p), (long)(l))
-#define loadDcacheInvalidateBlock() ASSERT(!"Not Implemented on V4e")
-#define IcacheInvalidateBlock() ASSERT(!"Not Implemented on V4e")
-
-/******************************************************************************/
-/*** Redundant Cache functionality on ColdFire ***/
-/******************************************************************************/
-#define DcacheInvalidateBlock(p, l) DcacheFlushInvalidateCacheBlock(p, l)
-#define DcacheFlushCacheBlock(p, l) DcacheFlushInvalidateCacheBlock(p, l)
-#define DcacheFlushBlock(p, l) DcacheFlushInvalidateCacheBlock(p, l)
-
-extern void DcacheFlushInvalidateCacheBlock(void *start, unsigned long size);
-extern void FLASHDcacheFlushInvalidate(void);
-
+extern unsigned long shadow_cacr;
extern void cacr_set(unsigned long x);
#endif /* !__ASSEMBLY__ */
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