[U-Boot] [PATCH v3 4/7] ARM: vf610: Enable caches

Sanchayan Maity
2015-04-15T10:54:25Z

From: Stefan Agner <stefan@agner.ch>

Enables caches which provides a rather huge speedup of the boot loader.
Also mark the on-chip RAM as cachable since this is the area U-Boot runs
from.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
---
arch/arm/cpu/armv7/vf610/generic.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/arch/arm/cpu/armv7/vf610/generic.c b/arch/arm/cpu/armv7/vf610/generic.c
index 3bdc221..1bb9b8e 100644
--- a/arch/arm/cpu/armv7/vf610/generic.c
+++ b/arch/arm/cpu/armv7/vf610/generic.c
@@ -342,3 +342,19 @@ int get_clocks(void)
#endif
return 0;
}
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+#if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
+ enum dcache_option option = DCACHE_WRITETHROUGH;
+#else
+ enum dcache_option option = DCACHE_WRITEBACK;
+#endif
+ dcache_enable();
+ icache_enable();
+
+ /* Enable caching on OCRAM */
+ mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR, IRAM_SIZE, option);
+}
+#endif
--
2.3.5