ARM: bcm281xx: Add L2 cache enable code

- Adds a module to provide calls into secure monitor mode
- Uses this module to make secure monitor calls to enable L2 cache.

Updates from V1:
- Split DT portion into separate patch
- replace #ifdef-ed L2 code with "if".
- move init call to board init

Signed-off-by: Christian Daudt <csd@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/mach-bcm/board_bcm.c b/arch/arm/mach-bcm/board_bcm.c
index f0f9abafad29..28be74e8273c 100644
--- a/arch/arm/mach-bcm/board_bcm.c
+++ b/arch/arm/mach-bcm/board_bcm.c
@@ -19,16 +19,39 @@
 
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
+#include <asm/hardware/cache-l2x0.h>
 
 static void timer_init(void)
 {
 }
 
 
+#include "bcm_kona_smc.h"
+
+static int __init kona_l2_cache_init(void)
+{
+	if (!IS_ENABLED(CONFIG_CACHE_L2X0))
+		return 0;
+
+	bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
+
+	/*
+	 * The aux_val and aux_mask have no effect since L2 cache is already
+	 * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
+	 */
+	l2x0_of_init(0, ~0);
+
+	return 0;
+}
+
 static void __init board_init(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table, NULL,
 		&platform_bus);
+
+	bcm_kona_smc_init();
+
+	kona_l2_cache_init();
 }
 
 static const char * const bcm11351_dt_compat[] = { "bcm,bcm11351", NULL, };