exynos5250: Add function for configuring L2 cache

This adds a new function to configure L2 cache for the
exynos5250 and deprecates the old function.

Change-Id: I9562f3301aa1e2911dae3856ab57bb6beec2e224
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2949
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Tested-by: build bot (Jenkins)

src/cpu/samsung/exynos5250/Makefile.inc

@@ -9,12 +9,10 @@ bootblock-$(CONFIG_EARLY_CONSOLE) += clock_init.c
 bootblock-$(CONFIG_EARLY_CONSOLE) += clock.c
 bootblock-$(CONFIG_EARLY_CONSOLE) += soc.c
 bootblock-$(CONFIG_EARLY_CONSOLE) += uart.c
-bootblock-y += exynos_cache.c
 
 romstage-y += clock.c
 romstage-y += clock_init.c
 romstage-y += pinmux.c  # required by s3c24x0_i2c (exynos5-common) and uart.
-romstage-y += exynos_cache.c
 romstage-y += dmc_common.c
 romstage-y += dmc_init_ddr3.c
 romstage-y += power.c
@@ -24,7 +22,6 @@ romstage-$(CONFIG_EARLY_CONSOLE) += uart.c
 #ramstage-y += tzpc_init.c
 ramstage-y += clock.c
 ramstage-y += clock_init.c
-ramstage-y += exynos_cache.c
 ramstage-y += pinmux.c
 ramstage-y += power.c
 ramstage-y += soc.c

src/cpu/samsung/exynos5250/cpu.c

@@ -1,5 +1,7 @@
 #include <console/console.h>
 #include <device/device.h>
+#include <arch/cache.h>
+#include <cpu/samsung/exynos5250/cpu.h>
 
 #define RAM_BASE_KB (CONFIG_SYS_SDRAM_BASE >> 10)
 #define RAM_SIZE_KB (CONFIG_DRAM_SIZE_MB << 10UL)
@@ -33,3 +35,17 @@ struct chip_operations cpu_samsung_exynos5250_ops = {
 	CHIP_NAME("CPU Samsung Exynos 5250")
 	.enable_dev = enable_dev,
 };
+
+void exynos5250_config_l2_cache(void)
+{
+	uint32_t val;
+
+	/*
+	 * Bit    9 - L2 tag RAM setup (1 cycle)
+	 * Bits 8:6 - L2 tag RAM latency (3 cycles)
+	 * Bit    5 - L2 data RAM setup (1 cycle)
+	 * Bits 2:0 - L2 data RAM latency (3 cycles)
+	 */
+	val = (1 << 9) | (0x2 << 6) | (1 << 5) | (0x2);
+	write_l2ctlr(val);
+}

src/cpu/samsung/exynos5250/cpu.h

@@ -118,4 +118,6 @@
 /* helper function to map mmio address to peripheral id */
 enum periph_id exynos5_get_periph_id(unsigned base_addr);
 
+void exynos5250_config_l2_cache(void);
+
 #endif	/* _EXYNOS5250_CPU_H */

src/cpu/samsung/exynos5250/exynos_cache.c

@@ -1,80 +0,0 @@
-/*
- * Copyright (c) 2012 Samsung Electronics.
- * Arun Mankuzhi <arun.m@samsung.com>
- *
- * 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., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <system.h>
-
-#include <armv7.h>
-
-enum l2_cache_params {
-	CACHE_TAG_RAM_SETUP = (1<<9),
-	CACHE_DATA_RAM_SETUP = (1<<5),
-	CACHE_TAG_RAM_LATENCY = (2<<6),
-	CACHE_DATA_RAM_LATENCY = (2<<0)
-};
-
-/*
- * Set L2 cache parameters
- */
-static void exynos5_set_l2cache_params(void)
-{
-	unsigned int val = 0;
-
-	asm volatile("mrc p15, 1, %0, c9, c0, 2\n" : "=r"(val));
-
-	val |= CACHE_TAG_RAM_SETUP |
-		CACHE_DATA_RAM_SETUP |
-		CACHE_TAG_RAM_LATENCY |
-		CACHE_DATA_RAM_LATENCY;
-
-	asm volatile("mcr p15, 1, %0, c9, c0, 2\n" : : "r"(val));
-}
-
-/*
- * Sets L2 cache related parameters before enabling data cache
- */
-void v7_outer_cache_enable(void)
-{
-	exynos5_set_l2cache_params();
-}
-
-/* stubs so we don't need weak symbols in cache_v7.c */
-void v7_outer_cache_disable(void)
-{
-}
-
-void v7_outer_cache_flush_all(void)
-{
-}
-
-void v7_outer_cache_inval_all(void)
-{
-}
-
-void v7_outer_cache_flush_range(u32 start, u32 end)
-{
-}
-
-void v7_outer_cache_inval_range(u32 start, u32 end)
-{
-}