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Diffstat (limited to '')
| -rw-r--r-- | bl32/tsp/tsp_common.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/bl32/tsp/tsp_common.c b/bl32/tsp/tsp_common.c new file mode 100644 index 0000000..908b4ff --- /dev/null +++ b/bl32/tsp/tsp_common.c @@ -0,0 +1,156 @@ +/* + * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <inttypes.h> +#include <stdint.h> + +#include <arch_features.h> +#include <arch_helpers.h> +#include <bl32/tsp/tsp.h> +#include <common/bl_common.h> +#include <common/debug.h> +#include <lib/spinlock.h> +#include <plat/common/platform.h> +#include <platform_tsp.h> +#include "tsp_private.h" + +#include <platform_def.h> + +/******************************************************************************* + * Per cpu data structure to populate parameters for an SMC in C code and use + * a pointer to this structure in assembler code to populate x0-x7. + ******************************************************************************/ +static smc_args_t tsp_smc_args[PLATFORM_CORE_COUNT]; + +/******************************************************************************* + * Per cpu data structure to keep track of TSP activity + ******************************************************************************/ +work_statistics_t tsp_stats[PLATFORM_CORE_COUNT]; + +smc_args_t *set_smc_args(uint64_t arg0, + uint64_t arg1, + uint64_t arg2, + uint64_t arg3, + uint64_t arg4, + uint64_t arg5, + uint64_t arg6, + uint64_t arg7) +{ + uint32_t linear_id; + smc_args_t *pcpu_smc_args; + + /* + * Return to Secure Monitor by raising an SMC. The results of the + * service are passed as an arguments to the SMC. + */ + linear_id = plat_my_core_pos(); + pcpu_smc_args = &tsp_smc_args[linear_id]; + write_sp_arg(pcpu_smc_args, SMC_ARG0, arg0); + write_sp_arg(pcpu_smc_args, SMC_ARG1, arg1); + write_sp_arg(pcpu_smc_args, SMC_ARG2, arg2); + write_sp_arg(pcpu_smc_args, SMC_ARG3, arg3); + write_sp_arg(pcpu_smc_args, SMC_ARG4, arg4); + write_sp_arg(pcpu_smc_args, SMC_ARG5, arg5); + write_sp_arg(pcpu_smc_args, SMC_ARG6, arg6); + write_sp_arg(pcpu_smc_args, SMC_ARG7, arg7); + + return pcpu_smc_args; +} + +/******************************************************************************* + * Setup function for TSP. + ******************************************************************************/ +void tsp_setup(void) +{ + /* Perform early platform-specific setup. */ + tsp_early_platform_setup(); + + /* Perform late platform-specific setup. */ + tsp_plat_arch_setup(); + +#if ENABLE_PAUTH + /* + * Assert that the ARMv8.3-PAuth registers are present or an access + * fault will be triggered when they are being saved or restored. + */ + assert(is_armv8_3_pauth_present()); +#endif /* ENABLE_PAUTH */ +} + +/******************************************************************************* + * This function performs any remaining bookkeeping in the test secure payload + * before the system is switched off (in response to a psci SYSTEM_OFF request). + ******************************************************************************/ +smc_args_t *tsp_system_off_main(uint64_t arg0, + uint64_t arg1, + uint64_t arg2, + uint64_t arg3, + uint64_t arg4, + uint64_t arg5, + uint64_t arg6, + uint64_t arg7) +{ + uint32_t linear_id = plat_my_core_pos(); + + /* Update this cpu's statistics. */ + tsp_stats[linear_id].smc_count++; + tsp_stats[linear_id].eret_count++; + + INFO("TSP: cpu 0x%lx SYSTEM_OFF request\n", read_mpidr()); + INFO("TSP: cpu 0x%lx: %d smcs, %d erets requests\n", read_mpidr(), + tsp_stats[linear_id].smc_count, + tsp_stats[linear_id].eret_count); + + /* Indicate to the SPD that we have completed this request. */ + return set_smc_args(TSP_SYSTEM_OFF_DONE, 0, 0, 0, 0, 0, 0, 0); +} + +/******************************************************************************* + * This function performs any remaining bookkeeping in the test secure payload + * before the system is reset (in response to a psci SYSTEM_RESET request). + ******************************************************************************/ +smc_args_t *tsp_system_reset_main(uint64_t arg0, + uint64_t arg1, + uint64_t arg2, + uint64_t arg3, + uint64_t arg4, + uint64_t arg5, + uint64_t arg6, + uint64_t arg7) +{ + uint32_t linear_id = plat_my_core_pos(); + + /* Update this cpu's statistics. */ + tsp_stats[linear_id].smc_count++; + tsp_stats[linear_id].eret_count++; + + INFO("TSP: cpu 0x%lx SYSTEM_RESET request\n", read_mpidr()); + INFO("TSP: cpu 0x%lx: %d smcs, %d erets requests\n", read_mpidr(), + tsp_stats[linear_id].smc_count, + tsp_stats[linear_id].eret_count); + + /* Indicate to the SPD that we have completed this request. */ + return set_smc_args(TSP_SYSTEM_RESET_DONE, 0, 0, 0, 0, 0, 0, 0); +} + +/******************************************************************************* + * TSP smc abort handler. This function is called when aborting a preempted + * yielding SMC request. It should cleanup all resources owned by the SMC + * handler such as locks or dynamically allocated memory so following SMC + * request are executed in a clean environment. + ******************************************************************************/ +smc_args_t *tsp_abort_smc_handler(uint64_t func, + uint64_t arg1, + uint64_t arg2, + uint64_t arg3, + uint64_t arg4, + uint64_t arg5, + uint64_t arg6, + uint64_t arg7) +{ + return set_smc_args(TSP_ABORT_DONE, 0, 0, 0, 0, 0, 0, 0); +} |