diff --git a/include/lib/cpus/aarch64/cortex_a53.h b/include/lib/cpus/aarch64/cortex_a53.h index 6e71f9c..169d8f4 100644 --- a/include/lib/cpus/aarch64/cortex_a53.h +++ b/include/lib/cpus/aarch64/cortex_a53.h @@ -1,5 +1,5 @@ /* - * 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__ */ diff --git a/include/lib/cpus/aarch64/cortex_a57.h b/include/lib/cpus/aarch64/cortex_a57.h index 6128b16..c81259c 100644 --- a/include/lib/cpus/aarch64/cortex_a57.h +++ b/include/lib/cpus/aarch64/cortex_a57.h @@ -1,5 +1,5 @@ /* - * 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__ */ diff --git a/plat/nvidia/tegra/common/aarch64/tegra_helpers.S b/plat/nvidia/tegra/common/aarch64/tegra_helpers.S index 2979b32..d9f287c 100644 --- a/plat/nvidia/tegra/common/aarch64/tegra_helpers.S +++ b/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 diff --git a/plat/nvidia/tegra/soc/t210/platform_t210.mk b/plat/nvidia/tegra/soc/t210/platform_t210.mk index ca7718c..5001629 100644 --- a/plat/nvidia/tegra/soc/t210/platform_t210.mk +++ b/plat/nvidia/tegra/soc/t210/platform_t210.mk @@ -40,6 +40,12 @@ 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))