This patch adds L2 Cache support for OMAP4. External L2 cache
is used in OMPA4
Signed-off-by: Santosh Shilimkar <santosh.shilim...@ti.com>
---
arch/arm/mach-omap2/board-4430sdp.c | 30 ++++++++++++++++++++++++++++
arch/arm/mm/Kconfig | 2 +-
arch/arm/plat-omap/include/plat/omap44xx.h | 1 +
3 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/board-4430sdp.c
b/arch/arm/mach-omap2/board-4430sdp.c
index 0c6be6b..ceb2490 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -28,6 +28,7 @@
#include <plat/control.h>
#include <plat/timer-gp.h>
#include <asm/hardware/gic.h>
+#include <asm/hardware/cache-l2x0.h>
static struct platform_device sdp4430_lcd_device = {
.name = "sdp4430_lcd",
@@ -49,6 +50,35 @@ static struct omap_lcd_config sdp4430_lcd_config __initdata
= {
static struct omap_board_config_kernel sdp4430_config[] __initdata = {
{ OMAP_TAG_LCD, &sdp4430_lcd_config },
};
+#ifdef CONFIG_CACHE_L2X0
+static int __init omap_l2_cache_init(void)
+{
+ void __iomem *l2cache_base;
+
+ /* Static mapping, never released */
+ l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
+ BUG_ON(!l2cache_base);
+
+ /* Enable L2 Cache using secure api
+ * Save/Restore relevant registers
+ */
+ __asm__ __volatile__(
+ "stmfd r13!, {r0-r12, r14}\n"
+ "mov r0, #1\n"
+ "ldr r12, =0x102\n"
+ "dsb\n"
+ "smc\n"
+ "ldmfd r13!, {r0-r12, r14}");
+
+ /* 32KB way size, 16-way associativity,
+ * parity disabled
+ */
+ l2x0_init(l2cache_base, 0x0e050000, 0xc0000fff);
+
+ return 0;
+}
+early_initcall(omap_l2_cache_init);
+#endif
static void __init gic_init_irq(void)
{
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index dd4698c..b146ae2 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -758,7 +758,7 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
config CACHE_L2X0
bool "Enable the L2x0 outer cache controller"
depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP ||
MACH_REALVIEW_PB1176 || \
- REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 ||
MACH_REALVIEW_PBX || ARCH_NOMADIK
+ REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 ||
MACH_REALVIEW_PBX || ARCH_NOMADIK || ARCH_OMAP4
default y
select OUTER_CACHE
help
diff --git a/arch/arm/plat-omap/include/plat/omap44xx.h
b/arch/arm/plat-omap/include/plat/omap44xx.h
index e52902a..9b7870c 100644
--- a/arch/arm/plat-omap/include/plat/omap44xx.h
+++ b/arch/arm/plat-omap/include/plat/omap44xx.h
@@ -38,6 +38,7 @@
#define OMAP44XX_GIC_CPU_BASE 0x48240100
#define OMAP44XX_SCU_BASE 0x48240000
#define OMAP44XX_LOCAL_TWD_BASE 0x48240600
+#define OMAP44XX_L2CACHE_BASE 0x48242000
#define OMAP44XX_WKUPGEN_BASE 0x48281000
#define OMAP44XX_MAILBOX_BASE (L4_44XX_BASE + 0xF4000)
--
1.6.0.4
--
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