diff options
Diffstat (limited to 'plat/arm/css/common')
| -rw-r--r-- | plat/arm/css/common/aarch32/css_helpers.S | 102 | ||||
| -rw-r--r-- | plat/arm/css/common/aarch64/css_helpers.S | 120 | ||||
| -rw-r--r-- | plat/arm/css/common/css_bl1_setup.c | 22 | ||||
| -rw-r--r-- | plat/arm/css/common/css_bl2_setup.c | 86 | ||||
| -rw-r--r-- | plat/arm/css/common/css_bl2u_setup.c | 56 | ||||
| -rw-r--r-- | plat/arm/css/common/css_common.mk | 97 | ||||
| -rw-r--r-- | plat/arm/css/common/css_pm.c | 415 | ||||
| -rw-r--r-- | plat/arm/css/common/css_topology.c | 48 | ||||
| -rw-r--r-- | plat/arm/css/common/sp_min/css_sp_min.mk | 22 |
9 files changed, 968 insertions, 0 deletions
diff --git a/plat/arm/css/common/aarch32/css_helpers.S b/plat/arm/css/common/aarch32/css_helpers.S new file mode 100644 index 0000000..d47e13d --- /dev/null +++ b/plat/arm/css/common/aarch32/css_helpers.S @@ -0,0 +1,102 @@ +/* + * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <cpu_macros.S> +#include <platform_def.h> + + .weak plat_secondary_cold_boot_setup + .weak plat_get_my_entrypoint + .globl css_calc_core_pos_swap_cluster + .weak plat_is_my_cpu_primary + + /* --------------------------------------------------------------------- + * void plat_secondary_cold_boot_setup(void); + * In the normal boot flow, cold-booting secondary + * CPUs is not yet implemented and they panic. + * --------------------------------------------------------------------- + */ +func plat_secondary_cold_boot_setup + /* TODO: Implement secondary CPU cold boot setup on CSS platforms */ +cb_panic: + b cb_panic +endfunc plat_secondary_cold_boot_setup + + /* --------------------------------------------------------------------- + * uintptr_t plat_get_my_entrypoint (void); + * + * Main job of this routine is to distinguish between a cold and a warm + * boot. On CSS platforms, this distinction is based on the contents of + * the Trusted Mailbox. It is initialised to zero by the SCP before the + * AP cores are released from reset. Therefore, a zero mailbox means + * it's a cold reset. + * + * This functions returns the contents of the mailbox, i.e.: + * - 0 for a cold boot; + * - the warm boot entrypoint for a warm boot. + * --------------------------------------------------------------------- + */ +func plat_get_my_entrypoint + ldr r0, =PLAT_ARM_TRUSTED_MAILBOX_BASE + ldr r0, [r0] + bx lr +endfunc plat_get_my_entrypoint + + /* ----------------------------------------------------------- + * unsigned int css_calc_core_pos_swap_cluster(u_register_t mpidr) + * Utility function to calculate the core position by + * swapping the cluster order. This is necessary in order to + * match the format of the boot information passed by the SCP + * and read in plat_is_my_cpu_primary below. + * ----------------------------------------------------------- + */ +func css_calc_core_pos_swap_cluster + and r1, r0, #MPIDR_CPU_MASK + and r0, r0, #MPIDR_CLUSTER_MASK + eor r0, r0, #(1 << MPIDR_AFFINITY_BITS) // swap cluster order + add r0, r1, r0, LSR #6 + bx lr +endfunc css_calc_core_pos_swap_cluster + + /* ----------------------------------------------------- + * unsigned int plat_is_my_cpu_primary (void); + * + * Find out whether the current cpu is the primary + * cpu (applicable ony after a cold boot) + * ----------------------------------------------------- + */ +#if CSS_USE_SCMI_SDS_DRIVER +func plat_is_my_cpu_primary + mov r10, lr + bl plat_my_core_pos + mov r4, r0 + bl sds_get_primary_cpu_id + /* Check for error */ + mov r1, #0xffffffff + cmp r0, r1 + beq 1f + cmp r0, r4 + moveq r0, #1 + movne r0, #0 + bx r10 +1: + no_ret plat_panic_handler +endfunc plat_is_my_cpu_primary +#else +func plat_is_my_cpu_primary + mov r10, lr + bl plat_my_core_pos + ldr r1, =SCP_BOOT_CFG_ADDR + ldr r1, [r1] + ubfx r1, r1, #PLAT_CSS_PRIMARY_CPU_SHIFT, \ + #PLAT_CSS_PRIMARY_CPU_BIT_WIDTH + cmp r0, r1 + moveq r0, #1 + movne r0, #0 + bx r10 +endfunc plat_is_my_cpu_primary +#endif diff --git a/plat/arm/css/common/aarch64/css_helpers.S b/plat/arm/css/common/aarch64/css_helpers.S new file mode 100644 index 0000000..01669be --- /dev/null +++ b/plat/arm/css/common/aarch64/css_helpers.S @@ -0,0 +1,120 @@ +/* + * Copyright (c) 2013-2017, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <cpu_macros.S> +#include <platform_def.h> + + .weak plat_secondary_cold_boot_setup + .weak plat_get_my_entrypoint + .globl css_calc_core_pos_swap_cluster + .weak plat_is_my_cpu_primary + + /* --------------------------------------------------------------------- + * void plat_secondary_cold_boot_setup(void); + * + * In the normal boot flow, cold-booting secondary CPUs is not yet + * implemented and they panic. + * + * When booting an EL3 payload, secondary CPUs are placed in a holding + * pen, waiting for their mailbox to be populated. Note that all CPUs + * share the same mailbox ; therefore, populating it will release all + * CPUs from their holding pen. If finer-grained control is needed then + * this should be handled in the code that secondary CPUs jump to. + * --------------------------------------------------------------------- + */ +func plat_secondary_cold_boot_setup +#ifndef EL3_PAYLOAD_BASE + /* TODO: Implement secondary CPU cold boot setup on CSS platforms */ +cb_panic: + b cb_panic +#else + mov_imm x0, PLAT_ARM_TRUSTED_MAILBOX_BASE + + /* Wait until the mailbox gets populated */ +poll_mailbox: + ldr x1, [x0] + cbz x1, 1f + br x1 +1: + wfe + b poll_mailbox +#endif /* EL3_PAYLOAD_BASE */ +endfunc plat_secondary_cold_boot_setup + + /* --------------------------------------------------------------------- + * uintptr_t plat_get_my_entrypoint (void); + * + * Main job of this routine is to distinguish between a cold and a warm + * boot. On CSS platforms, this distinction is based on the contents of + * the Trusted Mailbox. It is initialised to zero by the SCP before the + * AP cores are released from reset. Therefore, a zero mailbox means + * it's a cold reset. + * + * This functions returns the contents of the mailbox, i.e.: + * - 0 for a cold boot; + * - the warm boot entrypoint for a warm boot. + * --------------------------------------------------------------------- + */ +func plat_get_my_entrypoint + mov_imm x0, PLAT_ARM_TRUSTED_MAILBOX_BASE + ldr x0, [x0] + ret +endfunc plat_get_my_entrypoint + + /* ----------------------------------------------------------- + * unsigned int css_calc_core_pos_swap_cluster(u_register_t mpidr) + * Utility function to calculate the core position by + * swapping the cluster order. This is necessary in order to + * match the format of the boot information passed by the SCP + * and read in plat_is_my_cpu_primary below. + * ----------------------------------------------------------- + */ +func css_calc_core_pos_swap_cluster + and x1, x0, #MPIDR_CPU_MASK + and x0, x0, #MPIDR_CLUSTER_MASK + eor x0, x0, #(1 << MPIDR_AFFINITY_BITS) // swap cluster order + add x0, x1, x0, LSR #6 + ret +endfunc css_calc_core_pos_swap_cluster + + /* ----------------------------------------------------- + * unsigned int plat_is_my_cpu_primary (void); + * + * Find out whether the current cpu is the primary + * cpu (applicable ony after a cold boot) + * ----------------------------------------------------- + */ +#if CSS_USE_SCMI_SDS_DRIVER +func plat_is_my_cpu_primary + mov x9, x30 + bl plat_my_core_pos + mov x4, x0 + bl sds_get_primary_cpu_id + /* Check for error */ + mov x1, #0xffffffff + cmp x0, x1 + b.eq 1f + cmp x0, x4 + cset w0, eq + ret x9 +1: + no_ret plat_panic_handler +endfunc plat_is_my_cpu_primary +#else +func plat_is_my_cpu_primary + mov x9, x30 + bl plat_my_core_pos + mov_imm x1, SCP_BOOT_CFG_ADDR + ldr x1, [x1] + ubfx x1, x1, #PLAT_CSS_PRIMARY_CPU_SHIFT, \ + #PLAT_CSS_PRIMARY_CPU_BIT_WIDTH + cmp x0, x1 + cset w0, eq + ret x9 +endfunc plat_is_my_cpu_primary +#endif diff --git a/plat/arm/css/common/css_bl1_setup.c b/plat/arm/css/common/css_bl1_setup.c new file mode 100644 index 0000000..596cc3d --- /dev/null +++ b/plat/arm/css/common/css_bl1_setup.c @@ -0,0 +1,22 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common/bl_common.h> +#include <common/debug.h> +#include <plat/arm/common/plat_arm.h> +#include <plat/arm/soc/common/soc_css.h> +#include <plat/common/platform.h> + +void bl1_platform_setup(void) +{ + arm_bl1_platform_setup(); + /* + * Do ARM CSS SoC security setup. + * BL1 needs to enable normal world access to memory. + */ + soc_css_security_setup(); +} + diff --git a/plat/arm/css/common/css_bl2_setup.c b/plat/arm/css/common/css_bl2_setup.c new file mode 100644 index 0000000..002c6eb --- /dev/null +++ b/plat/arm/css/common/css_bl2_setup.c @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <string.h> + +#include <common/bl_common.h> +#include <common/debug.h> +#include <drivers/arm/css/css_scp.h> +#include <lib/mmio.h> +#include <lib/utils.h> +#include <plat/arm/common/plat_arm.h> +#include <platform_def.h> + +/* Weak definition may be overridden in specific CSS based platform */ +#pragma weak plat_arm_bl2_handle_scp_bl2 + +/******************************************************************************* + * Transfer SCP_BL2 from Trusted RAM using the SCP Download protocol. + * Return 0 on success, -1 otherwise. + ******************************************************************************/ +int plat_arm_bl2_handle_scp_bl2(image_info_t *scp_bl2_image_info) +{ + int ret; + + INFO("BL2: Initiating SCP_BL2 transfer to SCP\n"); + + ret = css_scp_boot_image_xfer((void *)scp_bl2_image_info->image_base, + scp_bl2_image_info->image_size); + + if (ret == 0) + ret = css_scp_boot_ready(); + + if (ret == 0) + INFO("BL2: SCP_BL2 transferred to SCP\n"); + else + ERROR("BL2: SCP_BL2 transfer failure\n"); + + return ret; +} + +#if !CSS_USE_SCMI_SDS_DRIVER +# if defined(EL3_PAYLOAD_BASE) || JUNO_AARCH32_EL3_RUNTIME + +/* + * We need to override some of the platform functions when booting an EL3 + * payload or SP_MIN on Juno AArch32. This needs to be done only for + * SCPI/BOM SCP systems as in case of SDS, the structures remain in memory and + * don't need to be overwritten. + */ + +static unsigned int scp_boot_config; + +void bl2_early_platform_setup2(u_register_t arg0, u_register_t arg1, + u_register_t arg2, u_register_t arg3) +{ + arm_bl2_early_platform_setup((uintptr_t)arg0, (meminfo_t *)arg1); + + /* Save SCP Boot config before it gets overwritten by SCP_BL2 loading */ + scp_boot_config = mmio_read_32(SCP_BOOT_CFG_ADDR); + VERBOSE("BL2: Saved SCP Boot config = 0x%x\n", scp_boot_config); +} + +void bl2_platform_setup(void) +{ + arm_bl2_platform_setup(); + + /* + * Before releasing the AP cores out of reset, the SCP writes some data + * at the beginning of the Trusted SRAM. It is is overwritten before + * reaching this function. We need to restore this data, as if the + * target had just come out of reset. This implies: + * - zeroing the first 128 bytes of Trusted SRAM using zeromem instead + * of zero_normalmem since this is device memory. + * - restoring the SCP boot configuration. + */ + VERBOSE("BL2: Restoring SCP reset data in Trusted SRAM\n"); + zeromem((void *) ARM_SHARED_RAM_BASE, 128); + mmio_write_32(SCP_BOOT_CFG_ADDR, scp_boot_config); +} + +# endif /* EL3_PAYLOAD_BASE */ + +#endif /* CSS_USE_SCMI_SDS_DRIVER */ diff --git a/plat/arm/css/common/css_bl2u_setup.c b/plat/arm/css/common/css_bl2u_setup.c new file mode 100644 index 0000000..15cf4f6 --- /dev/null +++ b/plat/arm/css/common/css_bl2u_setup.c @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common/bl_common.h> +#include <common/debug.h> +#include <drivers/arm/css/css_scp.h> +#include <plat/arm/common/plat_arm.h> +#include <plat/common/platform.h> + +/* Weak definition may be overridden in specific CSS based platform */ +#pragma weak bl2u_plat_handle_scp_bl2u + +/* Data structure which holds the SCP_BL2U image info for BL2U */ +static image_info_t scp_bl2u_image_info; + +/******************************************************************************* + * BL1 can pass platform dependent information to BL2U in x1. + * In case of ARM CSS platforms x1 contains SCP_BL2U image info. + * In case of ARM FVP platforms x1 is not used. + * In both cases, x0 contains the extents of the memory available to BL2U + ******************************************************************************/ +void bl2u_early_platform_setup(meminfo_t *mem_layout, void *plat_info) +{ + if (!plat_info) + panic(); + + arm_bl2u_early_platform_setup(mem_layout, plat_info); + + scp_bl2u_image_info = *(image_info_t *)plat_info; +} + +/******************************************************************************* + * Transfer SCP_BL2U from Trusted RAM using the SCP Download protocol. + ******************************************************************************/ +int bl2u_plat_handle_scp_bl2u(void) +{ + int ret; + + INFO("BL2U: Initiating SCP_BL2U transfer to SCP\n"); + + ret = css_scp_boot_image_xfer((void *)scp_bl2u_image_info.image_base, + scp_bl2u_image_info.image_size); + + if (ret == 0) + ret = css_scp_boot_ready(); + + if (ret == 0) + INFO("BL2U: SCP_BL2U transferred to SCP\n"); + else + ERROR("BL2U: SCP_BL2U transfer failure\n"); + + return ret; +} diff --git a/plat/arm/css/common/css_common.mk b/plat/arm/css/common/css_common.mk new file mode 100644 index 0000000..1e4851c --- /dev/null +++ b/plat/arm/css/common/css_common.mk @@ -0,0 +1,97 @@ +# +# Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# + + +# By default, SCP images are needed by CSS platforms. +CSS_LOAD_SCP_IMAGES ?= 1 + +# By default, SCMI driver is disabled for CSS platforms +CSS_USE_SCMI_SDS_DRIVER ?= 0 + +PLAT_INCLUDES += -Iinclude/plat/arm/css/common/aarch64 + + +PLAT_BL_COMMON_SOURCES += plat/arm/css/common/${ARCH}/css_helpers.S + +BL1_SOURCES += plat/arm/css/common/css_bl1_setup.c + +BL2_SOURCES += plat/arm/css/common/css_bl2_setup.c + +BL2U_SOURCES += plat/arm/css/common/css_bl2u_setup.c + +BL31_SOURCES += plat/arm/css/common/css_pm.c \ + plat/arm/css/common/css_topology.c + +ifeq (${CSS_USE_SCMI_SDS_DRIVER},0) +BL31_SOURCES += drivers/arm/css/mhu/css_mhu.c \ + drivers/arm/css/scp/css_pm_scpi.c \ + drivers/arm/css/scpi/css_scpi.c +else +BL31_SOURCES += drivers/arm/css/mhu/css_mhu_doorbell.c \ + drivers/arm/css/scmi/scmi_ap_core_proto.c \ + drivers/arm/css/scmi/scmi_common.c \ + drivers/arm/css/scmi/scmi_pwr_dmn_proto.c \ + drivers/arm/css/scmi/scmi_sys_pwr_proto.c \ + drivers/delay_timer/delay_timer.c \ + drivers/arm/css/scp/css_pm_scmi.c +endif + +# Process CSS_LOAD_SCP_IMAGES flag +$(eval $(call assert_boolean,CSS_LOAD_SCP_IMAGES)) +$(eval $(call add_define,CSS_LOAD_SCP_IMAGES)) + +ifeq (${CSS_LOAD_SCP_IMAGES},1) + NEED_SCP_BL2 := yes + ifneq (${TRUSTED_BOARD_BOOT},0) + $(eval $(call TOOL_ADD_IMG,scp_bl2u,--scp-fwu-cfg,FWU_)) + endif + + ifeq (${CSS_USE_SCMI_SDS_DRIVER},1) + BL2U_SOURCES += drivers/arm/css/scp/css_sds.c \ + drivers/arm/css/sds/sds.c + + BL2_SOURCES += drivers/arm/css/scp/css_sds.c \ + drivers/arm/css/sds/sds.c + else + BL2U_SOURCES += drivers/arm/css/mhu/css_mhu.c \ + drivers/arm/css/scp/css_bom_bootloader.c \ + drivers/arm/css/scpi/css_scpi.c + + BL2_SOURCES += drivers/arm/css/mhu/css_mhu.c \ + drivers/arm/css/scp/css_bom_bootloader.c \ + drivers/arm/css/scpi/css_scpi.c + # Enable option to detect whether the SCP ROM firmware in use predates version + # 1.7.0 and therefore, is incompatible. + CSS_DETECT_PRE_1_7_0_SCP := 1 + + # Process CSS_DETECT_PRE_1_7_0_SCP flag + $(eval $(call assert_boolean,CSS_DETECT_PRE_1_7_0_SCP)) + $(eval $(call add_define,CSS_DETECT_PRE_1_7_0_SCP)) + endif +endif + +ifeq (${CSS_USE_SCMI_SDS_DRIVER},1) + PLAT_BL_COMMON_SOURCES += drivers/arm/css/sds/${ARCH}/sds_helpers.S +endif + +# Process CSS_USE_SCMI_SDS_DRIVER flag +$(eval $(call assert_boolean,CSS_USE_SCMI_SDS_DRIVER)) +$(eval $(call add_define,CSS_USE_SCMI_SDS_DRIVER)) + +# Process CSS_NON_SECURE_UART flag +# This undocumented build option is only to enable debug access to the UART +# from non secure code, which is useful on some platforms. +# Default (obviously) is off. +CSS_NON_SECURE_UART := 0 +$(eval $(call assert_boolean,CSS_NON_SECURE_UART)) +$(eval $(call add_define,CSS_NON_SECURE_UART)) + +# Process CSS_SYSTEM_GRACEFUL_RESET flag +# This build option can be used on CSS platforms that require all the CPUs +# to execute the CPU specific power down sequence to complete a warm reboot +# sequence in which only the CPUs are power cycled. +CSS_SYSTEM_GRACEFUL_RESET := 0 +$(eval $(call add_define,CSS_SYSTEM_GRACEFUL_RESET)) diff --git a/plat/arm/css/common/css_pm.c b/plat/arm/css/common/css_pm.c new file mode 100644 index 0000000..9b2639c --- /dev/null +++ b/plat/arm/css/common/css_pm.c @@ -0,0 +1,415 @@ +/* + * Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> + +#include <platform_def.h> + +#include <arch_helpers.h> +#include <bl31/interrupt_mgmt.h> +#include <common/debug.h> +#include <drivers/arm/css/css_scp.h> +#include <lib/cassert.h> +#include <plat/arm/common/plat_arm.h> + +#include <plat/common/platform.h> + +#include <plat/arm/css/common/css_pm.h> + +/* Allow CSS platforms to override `plat_arm_psci_pm_ops` */ +#pragma weak plat_arm_psci_pm_ops + +#if ARM_RECOM_STATE_ID_ENC +/* + * The table storing the valid idle power states. Ensure that the + * array entries are populated in ascending order of state-id to + * enable us to use binary search during power state validation. + * The table must be terminated by a NULL entry. + */ +const unsigned int arm_pm_idle_states[] = { + /* State-id - 0x001 */ + arm_make_pwrstate_lvl2(ARM_LOCAL_STATE_RUN, ARM_LOCAL_STATE_RUN, + ARM_LOCAL_STATE_RET, ARM_PWR_LVL0, PSTATE_TYPE_STANDBY), + /* State-id - 0x002 */ + arm_make_pwrstate_lvl2(ARM_LOCAL_STATE_RUN, ARM_LOCAL_STATE_RUN, + ARM_LOCAL_STATE_OFF, ARM_PWR_LVL0, PSTATE_TYPE_POWERDOWN), + /* State-id - 0x022 */ + arm_make_pwrstate_lvl2(ARM_LOCAL_STATE_RUN, ARM_LOCAL_STATE_OFF, + ARM_LOCAL_STATE_OFF, ARM_PWR_LVL1, PSTATE_TYPE_POWERDOWN), +#if PLAT_MAX_PWR_LVL > ARM_PWR_LVL1 + /* State-id - 0x222 */ + arm_make_pwrstate_lvl2(ARM_LOCAL_STATE_OFF, ARM_LOCAL_STATE_OFF, + ARM_LOCAL_STATE_OFF, ARM_PWR_LVL2, PSTATE_TYPE_POWERDOWN), +#endif + 0, +}; +#endif /* __ARM_RECOM_STATE_ID_ENC__ */ + +/* + * All the power management helpers in this file assume at least cluster power + * level is supported. + */ +CASSERT(PLAT_MAX_PWR_LVL >= ARM_PWR_LVL1, + assert_max_pwr_lvl_supported_mismatch); + +/* + * Ensure that the PLAT_MAX_PWR_LVL is not greater than CSS_SYSTEM_PWR_DMN_LVL + * assumed by the CSS layer. + */ +CASSERT(PLAT_MAX_PWR_LVL <= CSS_SYSTEM_PWR_DMN_LVL, + assert_max_pwr_lvl_higher_than_css_sys_lvl); + +/******************************************************************************* + * Handler called when a power domain is about to be turned on. The + * level and mpidr determine the affinity instance. + ******************************************************************************/ +int css_pwr_domain_on(u_register_t mpidr) +{ + css_scp_on(mpidr); + + return PSCI_E_SUCCESS; +} + +static void css_pwr_domain_on_finisher_common( + const psci_power_state_t *target_state) +{ + assert(CSS_CORE_PWR_STATE(target_state) == ARM_LOCAL_STATE_OFF); + + /* + * Perform the common cluster specific operations i.e enable coherency + * if this cluster was off. + */ + if (CSS_CLUSTER_PWR_STATE(target_state) == ARM_LOCAL_STATE_OFF) + plat_arm_interconnect_enter_coherency(); +} + +/******************************************************************************* + * Handler called when a power level has just been powered on after + * being turned off earlier. The target_state encodes the low power state that + * each level has woken up from. This handler would never be invoked with + * the system power domain uninitialized as either the primary would have taken + * care of it as part of cold boot or the first core awakened from system + * suspend would have already initialized it. + ******************************************************************************/ +void css_pwr_domain_on_finish(const psci_power_state_t *target_state) +{ + /* Assert that the system power domain need not be initialized */ + assert(css_system_pwr_state(target_state) == ARM_LOCAL_STATE_RUN); + + css_pwr_domain_on_finisher_common(target_state); +} + +/******************************************************************************* + * Handler called when a power domain has just been powered on and the cpu + * and its cluster are fully participating in coherent transaction on the + * interconnect. Data cache must be enabled for CPU at this point. + ******************************************************************************/ +void css_pwr_domain_on_finish_late(const psci_power_state_t *target_state) +{ + /* Program the gic per-cpu distributor or re-distributor interface */ + plat_arm_gic_pcpu_init(); + + /* Enable the gic cpu interface */ + plat_arm_gic_cpuif_enable(); + + /* Setup the CPU power down request interrupt for secondary core(s) */ + css_setup_cpu_pwr_down_intr(); +} + +/******************************************************************************* + * Common function called while turning a cpu off or suspending it. It is called + * from css_off() or css_suspend() when these functions in turn are called for + * power domain at the highest power level which will be powered down. It + * performs the actions common to the OFF and SUSPEND calls. + ******************************************************************************/ +static void css_power_down_common(const psci_power_state_t *target_state) +{ + /* Prevent interrupts from spuriously waking up this cpu */ + plat_arm_gic_cpuif_disable(); + + /* Turn redistributor off */ + plat_arm_gic_redistif_off(); + + /* Cluster is to be turned off, so disable coherency */ + if (CSS_CLUSTER_PWR_STATE(target_state) == ARM_LOCAL_STATE_OFF) { + plat_arm_interconnect_exit_coherency(); + +#if HW_ASSISTED_COHERENCY + uint32_t reg; + + /* + * If we have determined this core to be the last man standing and we + * intend to power down the cluster proactively, we provide a hint to + * the power controller that cluster power is not required when all + * cores are powered down. + * Note that this is only an advisory to power controller and is supported + * by SoCs with DynamIQ Shared Units only. + */ + reg = read_clusterpwrdn(); + + /* Clear and set bit 0 : Cluster power not required */ + reg &= ~DSU_CLUSTER_PWR_MASK; + reg |= DSU_CLUSTER_PWR_OFF; + write_clusterpwrdn(reg); +#endif + } +} + +/******************************************************************************* + * Handler called when a power domain is about to be turned off. The + * target_state encodes the power state that each level should transition to. + ******************************************************************************/ +void css_pwr_domain_off(const psci_power_state_t *target_state) +{ + assert(CSS_CORE_PWR_STATE(target_state) == ARM_LOCAL_STATE_OFF); + css_power_down_common(target_state); + css_scp_off(target_state); +} + +/******************************************************************************* + * Handler called when a power domain is about to be suspended. The + * target_state encodes the power state that each level should transition to. + ******************************************************************************/ +void css_pwr_domain_suspend(const psci_power_state_t *target_state) +{ + /* + * CSS currently supports retention only at cpu level. Just return + * as nothing is to be done for retention. + */ + if (CSS_CORE_PWR_STATE(target_state) == ARM_LOCAL_STATE_RET) + return; + + + assert(CSS_CORE_PWR_STATE(target_state) == ARM_LOCAL_STATE_OFF); + css_power_down_common(target_state); + + /* Perform system domain state saving if issuing system suspend */ + if (css_system_pwr_state(target_state) == ARM_LOCAL_STATE_OFF) { + arm_system_pwr_domain_save(); + + /* Power off the Redistributor after having saved its context */ + plat_arm_gic_redistif_off(); + } + + css_scp_suspend(target_state); +} + +/******************************************************************************* + * Handler called when a power domain has just been powered on after + * having been suspended earlier. The target_state encodes the low power state + * that each level has woken up from. + * TODO: At the moment we reuse the on finisher and reinitialize the secure + * context. Need to implement a separate suspend finisher. + ******************************************************************************/ +void css_pwr_domain_suspend_finish( + const psci_power_state_t *target_state) +{ + /* Return as nothing is to be done on waking up from retention. */ + if (CSS_CORE_PWR_STATE(target_state) == ARM_LOCAL_STATE_RET) + return; + + /* Perform system domain restore if woken up from system suspend */ + if (css_system_pwr_state(target_state) == ARM_LOCAL_STATE_OFF) + /* + * At this point, the Distributor must be powered on to be ready + * to have its state restored. The Redistributor will be powered + * on as part of gicv3_rdistif_init_restore. + */ + arm_system_pwr_domain_resume(); + + css_pwr_domain_on_finisher_common(target_state); + + /* Enable the gic cpu interface */ + plat_arm_gic_cpuif_enable(); +} + +/******************************************************************************* + * Handlers to shutdown/reboot the system + ******************************************************************************/ +void __dead2 css_system_off(void) +{ + css_scp_sys_shutdown(); +} + +void __dead2 css_system_reset(void) +{ + css_scp_sys_reboot(); +} + +/******************************************************************************* + * Handler called when the CPU power domain is about to enter standby. + ******************************************************************************/ +void css_cpu_standby(plat_local_state_t cpu_state) +{ + unsigned int scr; + + assert(cpu_state == ARM_LOCAL_STATE_RET); + + scr = read_scr_el3(); + /* + * Enable the Non secure interrupt to wake the CPU. + * In GICv3 affinity routing mode, the non secure group1 interrupts use + * the PhysicalFIQ at EL3 whereas in GICv2, it uses the PhysicalIRQ. + * Enabling both the bits works for both GICv2 mode and GICv3 affinity + * routing mode. + */ + write_scr_el3(scr | SCR_IRQ_BIT | SCR_FIQ_BIT); + isb(); + dsb(); + wfi(); + + /* + * Restore SCR to the original value, synchronisation of scr_el3 is + * done by eret while el3_exit to save some execution cycles. + */ + write_scr_el3(scr); +} + +/******************************************************************************* + * Handler called to return the 'req_state' for system suspend. + ******************************************************************************/ +void css_get_sys_suspend_power_state(psci_power_state_t *req_state) +{ + unsigned int i; + + /* + * System Suspend is supported only if the system power domain node + * is implemented. + */ + assert(PLAT_MAX_PWR_LVL == CSS_SYSTEM_PWR_DMN_LVL); + + for (i = ARM_PWR_LVL0; i <= PLAT_MAX_PWR_LVL; i++) + req_state->pwr_domain_state[i] = ARM_LOCAL_STATE_OFF; +} + +/******************************************************************************* + * Handler to query CPU/cluster power states from SCP + ******************************************************************************/ +int css_node_hw_state(u_register_t mpidr, unsigned int power_level) +{ + return css_scp_get_power_state(mpidr, power_level); +} + +/* + * The system power domain suspend is only supported only via + * PSCI SYSTEM_SUSPEND API. PSCI CPU_SUSPEND request to system power domain + * will be downgraded to the lower level. + */ +static int css_validate_power_state(unsigned int power_state, + psci_power_state_t *req_state) +{ + int rc; + rc = arm_validate_power_state(power_state, req_state); + + /* + * Ensure that we don't overrun the pwr_domain_state array in the case + * where the platform supported max power level is less than the system + * power level + */ + +#if (PLAT_MAX_PWR_LVL == CSS_SYSTEM_PWR_DMN_LVL) + + /* + * Ensure that the system power domain level is never suspended + * via PSCI CPU SUSPEND API. Currently system suspend is only + * supported via PSCI SYSTEM SUSPEND API. + */ + + req_state->pwr_domain_state[CSS_SYSTEM_PWR_DMN_LVL] = + ARM_LOCAL_STATE_RUN; +#endif + + return rc; +} + +/* + * Custom `translate_power_state_by_mpidr` handler for CSS. Unlike in the + * `css_validate_power_state`, we do not downgrade the system power + * domain level request in `power_state` as it will be used to query the + * PSCI_STAT_COUNT/RESIDENCY at the system power domain level. + */ +static int css_translate_power_state_by_mpidr(u_register_t mpidr, + unsigned int power_state, + psci_power_state_t *output_state) +{ + return arm_validate_power_state(power_state, output_state); +} + +/* + * Setup the SGI interrupt that will be used trigger the execution of power + * down sequence for all the secondary cores. This interrupt is setup to be + * handled in EL3 context at a priority defined by the platform. + */ +void css_setup_cpu_pwr_down_intr(void) +{ +#if CSS_SYSTEM_GRACEFUL_RESET + plat_ic_set_interrupt_type(CSS_CPU_PWR_DOWN_REQ_INTR, INTR_TYPE_EL3); + plat_ic_set_interrupt_priority(CSS_CPU_PWR_DOWN_REQ_INTR, + PLAT_REBOOT_PRI); + plat_ic_enable_interrupt(CSS_CPU_PWR_DOWN_REQ_INTR); +#endif +} + +/* + * For a graceful shutdown/reboot, each CPU in the system should do their power + * down sequence. On a PSCI shutdown/reboot request, only one CPU gets an + * opportunity to do the powerdown sequence. To achieve graceful reset, of all + * cores in the system, the CPU gets the opportunity raise warm reboot SGI to + * rest of the CPUs which are online. Add handler for the reboot SGI where the + * rest of the CPU execute the powerdown sequence. + */ +int css_reboot_interrupt_handler(uint32_t intr_raw, uint32_t flags, + void *handle, void *cookie) +{ + assert(intr_raw == CSS_CPU_PWR_DOWN_REQ_INTR); + + /* Deactivate warm reboot SGI */ + plat_ic_end_of_interrupt(CSS_CPU_PWR_DOWN_REQ_INTR); + + /* + * Disable GIC CPU interface to prevent pending interrupt from waking + * up the AP from WFI. + */ + plat_arm_gic_cpuif_disable(); + plat_arm_gic_redistif_off(); + + psci_pwrdown_cpu(PLAT_MAX_PWR_LVL); + + dmbsy(); + + wfi(); + return 0; +} + +/******************************************************************************* + * Export the platform handlers via plat_arm_psci_pm_ops. The ARM Standard + * platform will take care of registering the handlers with PSCI. + ******************************************************************************/ +plat_psci_ops_t plat_arm_psci_pm_ops = { + .pwr_domain_on = css_pwr_domain_on, + .pwr_domain_on_finish = css_pwr_domain_on_finish, + .pwr_domain_on_finish_late = css_pwr_domain_on_finish_late, + .pwr_domain_off = css_pwr_domain_off, + .cpu_standby = css_cpu_standby, + .pwr_domain_suspend = css_pwr_domain_suspend, + .pwr_domain_suspend_finish = css_pwr_domain_suspend_finish, + .system_off = css_system_off, + .system_reset = css_system_reset, + .validate_power_state = css_validate_power_state, + .validate_ns_entrypoint = arm_validate_psci_entrypoint, + .translate_power_state_by_mpidr = css_translate_power_state_by_mpidr, + .get_node_hw_state = css_node_hw_state, + .get_sys_suspend_power_state = css_get_sys_suspend_power_state, + +#if defined(PLAT_ARM_MEM_PROT_ADDR) + .mem_protect_chk = arm_psci_mem_protect_chk, + .read_mem_protect = arm_psci_read_mem_protect, + .write_mem_protect = arm_nor_psci_write_mem_protect, +#endif +#if CSS_USE_SCMI_SDS_DRIVER + .system_reset2 = css_system_reset2, +#endif +}; diff --git a/plat/arm/css/common/css_topology.c b/plat/arm/css/common/css_topology.c new file mode 100644 index 0000000..8aca744 --- /dev/null +++ b/plat/arm/css/common/css_topology.c @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> + +#include <plat/arm/common/plat_arm.h> +#include <plat/common/platform.h> + +#if ARM_PLAT_MT +#pragma weak plat_arm_get_cpu_pe_count +#endif + +/****************************************************************************** + * This function implements a part of the critical interface between the psci + * generic layer and the platform that allows the former to query the platform + * to convert an MPIDR to a unique linear index. An error code (-1) is + * returned in case the MPIDR is invalid. + *****************************************************************************/ +int plat_core_pos_by_mpidr(u_register_t mpidr) +{ + if (arm_check_mpidr(mpidr) == 0) { +#if ARM_PLAT_MT + assert((read_mpidr_el1() & MPIDR_MT_MASK) != 0); + + /* + * The DTB files don't provide the MT bit in the mpidr argument + * so set it manually before calculating core position + */ + mpidr |= MPIDR_MT_MASK; +#endif + return plat_arm_calc_core_pos(mpidr); + } + return -1; +} + +#if ARM_PLAT_MT +/****************************************************************************** + * This function returns the PE count within the physical cpu corresponding to + * `mpidr`. Now one cpu only have one thread, so just return 1. + *****************************************************************************/ +unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr) +{ + return 1; +} +#endif /* ARM_PLAT_MT */ diff --git a/plat/arm/css/common/sp_min/css_sp_min.mk b/plat/arm/css/common/sp_min/css_sp_min.mk new file mode 100644 index 0000000..ae489fd --- /dev/null +++ b/plat/arm/css/common/sp_min/css_sp_min.mk @@ -0,0 +1,22 @@ +# +# Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# + +# SP MIN source files common to CSS platforms +BL32_SOURCES += plat/arm/css/common/css_pm.c \ + plat/arm/css/common/css_topology.c + +ifeq (${CSS_USE_SCMI_SDS_DRIVER},0) +BL32_SOURCES += drivers/arm/css/mhu/css_mhu.c \ + drivers/arm/css/scp/css_pm_scpi.c \ + drivers/arm/css/scpi/css_scpi.c +else +BL32_SOURCES += drivers/arm/css/mhu/css_mhu_doorbell.c \ + drivers/arm/css/scp/css_pm_scmi.c \ + drivers/delay_timer/delay_timer.c \ + drivers/arm/css/scmi/scmi_common.c \ + drivers/arm/css/scmi/scmi_pwr_dmn_proto.c \ + drivers/arm/css/scmi/scmi_sys_pwr_proto.c +endif |