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authorAnatolij Gustschin <agust@denx.de>2012-04-02 06:18:00 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-04-16 14:53:58 +0200
commit219872c8fe890cd280cf54f27df86504bb17d277 (patch)
tree605a49912a56cbda4c85965c11eb746c9a0a104f /arch/arm/cpu
parentf4ac6cb6af107ce62754dd3bfc7ff31a92e7e2c8 (diff)
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ARM1136: add cache flush and invalidate operations
Since commit 5c1ad3e6f8ae578bbe30e09652f1531e9bc22031 (net: fec_mxc: allow use with cache enabled) the FEC_MXC driver uses flush_dcache_range() and invalidate_dcache_range() functions. This driver is also configured for ARM1136 based 'flea3' and 'mx35pdk' boards which currently do not build as there are no ARM1136 specific flush_dcache_range() and invalidate_dcache_range() functions. Add various ARM1136 cache functions to fix building for 'flea3' and 'mx35pdk'. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Stefano Babic <sbabic@denx.de> Cc: Fabio Estevam <fabio.estevam@freescale.com> CC: Mike Frysinger <vapier@gentoo.org> CC: Marek Vasut <marex@denx.de> Acked-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/arm1136/cpu.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm1136/cpu.c b/arch/arm/cpu/arm1136/cpu.c
index 2b91631..f2e30b5 100644
--- a/arch/arm/cpu/arm1136/cpu.c
+++ b/arch/arm/cpu/arm1136/cpu.c
@@ -75,3 +75,98 @@ static void cache_flush(void)
asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */
asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */
}
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+
+#ifndef CONFIG_SYS_CACHELINE_SIZE
+#define CONFIG_SYS_CACHELINE_SIZE 32
+#endif
+
+void invalidate_dcache_all(void)
+{
+ asm ("mcr p15, 0, %0, c7, c6, 0" : : "r" (0));
+}
+
+void flush_dcache_all(void)
+{
+ asm ("mcr p15, 0, %0, c7, c10, 0" : : "r" (0));
+ asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
+}
+
+static inline int bad_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)
+{
+ if (bad_cache_range(start, stop))
+ return;
+
+ while (start < stop) {
+ asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
+ start += CONFIG_SYS_CACHELINE_SIZE;
+ }
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+ if (bad_cache_range(start, stop))
+ return;
+
+ while (start < stop) {
+ asm ("mcr p15, 0, %0, c7, c14, 1" : : "r" (start));
+ start += CONFIG_SYS_CACHELINE_SIZE;
+ }
+
+ asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0));
+}
+
+void flush_cache(unsigned long start, unsigned long size)
+{
+ flush_dcache_range(start, start + size);
+}
+
+void enable_caches(void)
+{
+#ifndef CONFIG_SYS_ICACHE_OFF
+ icache_enable();
+#endif
+#ifndef CONFIG_SYS_DCACHE_OFF
+ dcache_enable();
+#endif
+}
+
+#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
+void invalidate_dcache_all(void)
+{
+}
+
+void flush_dcache_all(void)
+{
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_cache(unsigned long start, unsigned long size)
+{
+}
+#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */