Merge pull request #371 from vwadekar/retention-entry-v3

Retention entry v3

include/lib/cpus/aarch64/cortex_a53.h

 /*
- * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -34,6 +34,15 @@
 /* Cortex-A53 midr for revision 0 */
 #define CORTEX_A53_MIDR 0x410FD030
 
+/* Retention timer tick definitions */
+#define RETENTION_ENTRY_TICKS_2		0x1
+#define RETENTION_ENTRY_TICKS_8		0x2
+#define RETENTION_ENTRY_TICKS_32	0x3
+#define RETENTION_ENTRY_TICKS_64	0x4
+#define RETENTION_ENTRY_TICKS_128	0x5
+#define RETENTION_ENTRY_TICKS_256	0x6
+#define RETENTION_ENTRY_TICKS_512	0x7
+
 /*******************************************************************************
  * CPU Extended Control register specific definitions.
  ******************************************************************************/
@@ -41,6 +50,12 @@
 
 #define CPUECTLR_SMP_BIT		(1 << 6)
 
+#define CPUECTLR_CPU_RET_CTRL_SHIFT	0
+#define CPUECTLR_CPU_RET_CTRL_MASK	(0x7 << CPUECTLR_CPU_RET_CTRL_SHIFT)
+
+#define CPUECTLR_FPU_RET_CTRL_SHIFT	3
+#define CPUECTLR_FPU_RET_CTRL_MASK	(0x7 << CPUECTLR_FPU_RET_CTRL_SHIFT)
+
 /*******************************************************************************
  * CPU Auxiliary Control register specific definitions.
  ******************************************************************************/
@@ -56,4 +71,12 @@
 #define L2ACTLR_ENABLE_UNIQUECLEAN	(1 << 14)
 #define L2ACTLR_DISABLE_CLEAN_PUSH	(1 << 3)
 
+/*******************************************************************************
+ * L2 Extended Control register specific definitions.
+ ******************************************************************************/
+#define L2ECTLR_EL1			S3_1_C11_C0_3	/* Instruction def. */
+
+#define L2ECTLR_RET_CTRL_SHIFT		0
+#define L2ECTLR_RET_CTRL_MASK		(0x7 << L2ECTLR_RET_CTRL_SHIFT)
+
 #endif /* __CORTEX_A53_H__ */

include/lib/cpus/aarch64/cortex_a57.h

 /*
- * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2015, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -34,6 +34,15 @@
 /* Cortex-A57 midr for revision 0 */
 #define CORTEX_A57_MIDR 0x410FD070
 
+/* Retention timer tick definitions */
+#define RETENTION_ENTRY_TICKS_2		0x1
+#define RETENTION_ENTRY_TICKS_8		0x2
+#define RETENTION_ENTRY_TICKS_32	0x3
+#define RETENTION_ENTRY_TICKS_64	0x4
+#define RETENTION_ENTRY_TICKS_128	0x5
+#define RETENTION_ENTRY_TICKS_256	0x6
+#define RETENTION_ENTRY_TICKS_512	0x7
+
 /*******************************************************************************
  * CPU Extended Control register specific definitions.
  ******************************************************************************/
@@ -44,6 +53,9 @@
 #define CPUECTLR_L2_IPFTCH_DIST_MASK	(0x3 << 35)
 #define CPUECTLR_L2_DPFTCH_DIST_MASK	(0x3 << 32)
 
+#define CPUECTLR_CPU_RET_CTRL_SHIFT	0
+#define CPUECTLR_CPU_RET_CTRL_MASK	(0x7 << CPUECTLR_CPU_RET_CTRL_SHIFT)
+
 /*******************************************************************************
  * CPU Auxiliary Control register specific definitions.
  ******************************************************************************/
@@ -63,4 +75,12 @@
 #define L2_DATA_RAM_LATENCY_3_CYCLES	0x2
 #define L2_TAG_RAM_LATENCY_3_CYCLES	0x2
 
+/*******************************************************************************
+ * L2 Extended Control register specific definitions.
+ ******************************************************************************/
+#define L2ECTLR_EL1			S3_1_C11_C0_3	/* Instruction def. */
+
+#define L2ECTLR_RET_CTRL_SHIFT		0
+#define L2ECTLR_RET_CTRL_MASK		(0x7 << L2ECTLR_RET_CTRL_SHIFT)
+
 #endif /* __CORTEX_A57_H__ */

plat/nvidia/tegra/common/aarch64/tegra_helpers.S

@@ -57,6 +57,28 @@
 	 */
 .macro	cpu_init_common
 
+#if ENABLE_L2_DYNAMIC_RETENTION
+	/* ---------------------------
+	 * Enable processor retention
+	 * ---------------------------
+	*/
+	mrs	x0, L2ECTLR_EL1
+	mov	x1, #RETENTION_ENTRY_TICKS_512 << L2ECTLR_RET_CTRL_SHIFT
+	bic	x0, x0, #L2ECTLR_RET_CTRL_MASK
+	orr	x0, x0, x1
+	msr	L2ECTLR_EL1, x0
+	isb
+#endif
+
+#if ENABLE_CPU_DYNAMIC_RETENTION
+	mrs	x0, CPUECTLR_EL1
+	mov	x1, #RETENTION_ENTRY_TICKS_512 << CPUECTLR_CPU_RET_CTRL_SHIFT
+	bic	x0, x0, #CPUECTLR_CPU_RET_CTRL_MASK
+	orr	x0, x0, x1
+	msr	CPUECTLR_EL1, x0
+	isb
+#endif
+
 #if ENABLE_NS_L2_CPUECTRL_RW_ACCESS
 	/* -------------------------------------------------------
 	 * Enable L2 and CPU ECTLR RW access from non-secure world

plat/nvidia/tegra/soc/t210/platform_t210.mk

@@ -40,6 +40,12 @@ $(eval $(call add_define,ERRATA_TEGRA_INVALIDATE_BTB_AT_BOOT))
 ENABLE_NS_L2_CPUECTRL_RW_ACCESS		:= 1
 $(eval $(call add_define,ENABLE_NS_L2_CPUECTRL_RW_ACCESS))
 
+ENABLE_L2_DYNAMIC_RETENTION		:= 1
+$(eval $(call add_define,ENABLE_L2_DYNAMIC_RETENTION))
+
+ENABLE_CPU_DYNAMIC_RETENTION		:= 1
+$(eval $(call add_define,ENABLE_CPU_DYNAMIC_RETENTION))
+
 PLATFORM_CLUSTER_COUNT			:= 2
 $(eval $(call add_define,PLATFORM_CLUSTER_COUNT))