X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm926ejs%2Fcache.c;h=2839c863e82c790f2345332f8b7eb23033d96bab;hb=cad04990715f7eaecd45196e84cf10e9e3248dae;hp=441564203bd99868435aea3099ff3788a955109d;hpb=2f3427ccb915c6f6774f0bcebb67c648dc25dcfd;p=u-boot

diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
index 441564203b..2839c863e8 100644
--- a/arch/arm/cpu/arm926ejs/cache.c
+++ b/arch/arm/cpu/arm926ejs/cache.c
@@ -2,55 +2,72 @@
  * (C) Copyright 2011
  * Ilya Yanok, EmCraft Systems
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc.
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 #include <linux/types.h>
 #include <common.h>
 
 #ifndef CONFIG_SYS_DCACHE_OFF
-static inline void dcache_noop(void)
-{
-	if (dcache_status()) {
-		puts("WARNING: cache operations are not implemented!\n"
-		     "WARNING: disabling D-Cache now, you can re-enable it"
-		     "later with 'dcache on' command\n");
-		dcache_disable();
-	}
-}
+
+#ifndef CONFIG_SYS_CACHELINE_SIZE
+#define CONFIG_SYS_CACHELINE_SIZE	32
+#endif
 
 void invalidate_dcache_all(void)
 {
-	dcache_noop();
+	asm volatile("mcr p15, 0, %0, c7, c6, 0\n" : : "r"(0));
 }
 
 void flush_dcache_all(void)
 {
-	dcache_noop();
+	asm volatile(
+		"0:"
+		"mrc p15, 0, r15, c7, c14, 3\n"
+		"bne 0b\n"
+		"mcr p15, 0, %0, c7, c10, 4\n"
+		 : : "r"(0) : "memory"
+	);
+}
+
+static int check_cache_range(unsigned long start, unsigned long stop)
+{
+	int ok = 1;
+
+	if (start & (CONFIG_SYS_CACHELINE_SIZE - 1))
+		ok = 0;
+
+	if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1))
+		ok = 0;
+
+	if (!ok)
+		debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n",
+			start, stop);
+
+	return ok;
 }
 
 void invalidate_dcache_range(unsigned long start, unsigned long stop)
 {
-	dcache_noop();
+	if (!check_cache_range(start, stop))
+		return;
+
+	while (start < stop) {
+		asm volatile("mcr p15, 0, %0, c7, c6, 1\n" : : "r"(start));
+		start += CONFIG_SYS_CACHELINE_SIZE;
+	}
 }
 
 void flush_dcache_range(unsigned long start, unsigned long stop)
 {
-	dcache_noop();
+	if (!check_cache_range(start, stop))
+		return;
+
+	while (start < stop) {
+		asm volatile("mcr p15, 0, %0, c7, c14, 1\n" : : "r"(start));
+		start += CONFIG_SYS_CACHELINE_SIZE;
+	}
+
+	asm volatile("mcr p15, 0, %0, c7, c10, 4\n" : : "r"(0));
 }
 #else /* #ifndef CONFIG_SYS_DCACHE_OFF */
 void invalidate_dcache_all(void)
@@ -60,16 +77,14 @@ void invalidate_dcache_all(void)
 void flush_dcache_all(void)
 {
 }
+#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
 
-void invalidate_dcache_range(unsigned long start, unsigned long stop)
-{
-}
+/*
+ * Stub implementations for l2 cache operations
+ */
 
-void flush_dcache_range(unsigned long start, unsigned long stop)
-{
-}
+__weak void l2_cache_disable(void) {}
 
-void  flush_cache(unsigned long start, unsigned long size)
-{
-}
-#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
+#if defined CONFIG_SYS_THUMB_BUILD
+__weak void invalidate_l2_cache(void) {}
+#endif