blob: 0a817351c1fa3682ad94129fb3fbe3b68c40bf83 [file] [log] [blame]
/*
* Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <platform_def.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"
/*******************************************************************************
* Lock to control access to the console
******************************************************************************/
spinlock_t console_lock;
/*******************************************************************************
* 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 tsp_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];
/*******************************************************************************
* The TSP memory footprint starts at address BL32_BASE and ends with the
* linker symbol __BL32_END__. Use these addresses to compute the TSP image
* size.
******************************************************************************/
#define BL32_TOTAL_LIMIT BL32_END
#define BL32_TOTAL_SIZE (BL32_TOTAL_LIMIT - (unsigned long) BL32_BASE)
static tsp_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;
tsp_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, TSP_ARG0, arg0);
write_sp_arg(pcpu_smc_args, TSP_ARG1, arg1);
write_sp_arg(pcpu_smc_args, TSP_ARG2, arg2);
write_sp_arg(pcpu_smc_args, TSP_ARG3, arg3);
write_sp_arg(pcpu_smc_args, TSP_ARG4, arg4);
write_sp_arg(pcpu_smc_args, TSP_ARG5, arg5);
write_sp_arg(pcpu_smc_args, TSP_ARG6, arg6);
write_sp_arg(pcpu_smc_args, TSP_ARG7, arg7);
return pcpu_smc_args;
}
/*******************************************************************************
* Setup function for TSP.
******************************************************************************/
void tsp_setup(void)
{
/* Perform early platform-specific setup */
tsp_early_platform_setup();
/*
* Update pointer authentication key before the MMU is enabled. It is
* saved in the rodata section, that can be writen before enabling the
* MMU. This function must be called after the console is initialized
* in the early platform setup.
*/
bl_handle_pauth();
/* Perform late platform-specific setup */
tsp_plat_arch_setup();
}
/*******************************************************************************
* TSP main entry point where it gets the opportunity to initialize its secure
* state/applications. Once the state is initialized, it must return to the
* SPD with a pointer to the 'tsp_vector_table' jump table.
******************************************************************************/
uint64_t tsp_main(void)
{
NOTICE("TSP: %s\n", version_string);
NOTICE("TSP: %s\n", build_message);
INFO("TSP: Total memory base : 0x%lx\n", (unsigned long) BL32_BASE);
INFO("TSP: Total memory size : 0x%lx bytes\n", BL32_TOTAL_SIZE);
uint32_t linear_id = plat_my_core_pos();
/* Initialize the platform */
tsp_platform_setup();
/* Initialize secure/applications state here */
tsp_generic_timer_start();
/* Update this cpu's statistics */
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
tsp_stats[linear_id].cpu_on_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu on requests\n",
read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count,
tsp_stats[linear_id].cpu_on_count);
spin_unlock(&console_lock);
#endif
return (uint64_t) &tsp_vector_table;
}
/*******************************************************************************
* This function performs any remaining book keeping in the test secure payload
* after this cpu's architectural state has been setup in response to an earlier
* psci cpu_on request.
******************************************************************************/
tsp_args_t *tsp_cpu_on_main(void)
{
uint32_t linear_id = plat_my_core_pos();
/* Initialize secure/applications state here */
tsp_generic_timer_start();
/* Update this cpu's statistics */
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
tsp_stats[linear_id].cpu_on_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx turned on\n", read_mpidr());
INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu on requests\n",
read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count,
tsp_stats[linear_id].cpu_on_count);
spin_unlock(&console_lock);
#endif
/* Indicate to the SPD that we have completed turned ourselves on */
return set_smc_args(TSP_ON_DONE, 0, 0, 0, 0, 0, 0, 0);
}
/*******************************************************************************
* This function performs any remaining book keeping in the test secure payload
* before this cpu is turned off in response to a psci cpu_off request.
******************************************************************************/
tsp_args_t *tsp_cpu_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();
/*
* This cpu is being turned off, so disable the timer to prevent the
* secure timer interrupt from interfering with power down. A pending
* interrupt will be lost but we do not care as we are turning off.
*/
tsp_generic_timer_stop();
/* Update this cpu's statistics */
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
tsp_stats[linear_id].cpu_off_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx off request\n", read_mpidr());
INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu off requests\n",
read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count,
tsp_stats[linear_id].cpu_off_count);
spin_unlock(&console_lock);
#endif
/* Indicate to the SPD that we have completed this request */
return set_smc_args(TSP_OFF_DONE, 0, 0, 0, 0, 0, 0, 0);
}
/*******************************************************************************
* This function performs any book keeping in the test secure payload before
* this cpu's architectural state is saved in response to an earlier psci
* cpu_suspend request.
******************************************************************************/
tsp_args_t *tsp_cpu_suspend_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();
/*
* Save the time context and disable it to prevent the secure timer
* interrupt from interfering with wakeup from the suspend state.
*/
tsp_generic_timer_save();
tsp_generic_timer_stop();
/* Update this cpu's statistics */
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
tsp_stats[linear_id].cpu_suspend_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu suspend requests\n",
read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count,
tsp_stats[linear_id].cpu_suspend_count);
spin_unlock(&console_lock);
#endif
/* Indicate to the SPD that we have completed this request */
return set_smc_args(TSP_SUSPEND_DONE, 0, 0, 0, 0, 0, 0, 0);
}
/*******************************************************************************
* This function performs any book keeping in the test secure payload after this
* cpu's architectural state has been restored after wakeup from an earlier psci
* cpu_suspend request.
******************************************************************************/
tsp_args_t *tsp_cpu_resume_main(uint64_t max_off_pwrlvl,
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();
/* Restore the generic timer context */
tsp_generic_timer_restore();
/* Update this cpu's statistics */
tsp_stats[linear_id].smc_count++;
tsp_stats[linear_id].eret_count++;
tsp_stats[linear_id].cpu_resume_count++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
INFO("TSP: cpu 0x%lx resumed. maximum off power level %lld\n",
read_mpidr(), max_off_pwrlvl);
INFO("TSP: cpu 0x%lx: %d smcs, %d erets %d cpu suspend requests\n",
read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count,
tsp_stats[linear_id].cpu_suspend_count);
spin_unlock(&console_lock);
#endif
/* Indicate to the SPD that we have completed this request */
return set_smc_args(TSP_RESUME_DONE, 0, 0, 0, 0, 0, 0, 0);
}
/*******************************************************************************
* 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)
******************************************************************************/
tsp_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++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
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);
spin_unlock(&console_lock);
#endif
/* 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)
******************************************************************************/
tsp_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++;
#if LOG_LEVEL >= LOG_LEVEL_INFO
spin_lock(&console_lock);
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);
spin_unlock(&console_lock);
#endif
/* 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 fast smc handler. The secure monitor jumps to this function by
* doing the ERET after populating X0-X7 registers. The arguments are received
* in the function arguments in order. Once the service is rendered, this
* function returns to Secure Monitor by raising SMC.
******************************************************************************/
tsp_args_t *tsp_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)
{
uint64_t results[2];
uint64_t service_args[2];
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 received %s smc 0x%llx\n", read_mpidr(),
((func >> 31) & 1) == 1 ? "fast" : "yielding",
func);
INFO("TSP: cpu 0x%lx: %d smcs, %d erets\n", read_mpidr(),
tsp_stats[linear_id].smc_count,
tsp_stats[linear_id].eret_count);
/* Render secure services and obtain results here */
results[0] = arg1;
results[1] = arg2;
/*
* Request a service back from dispatcher/secure monitor. This call
* return and thereafter resume execution
*/
tsp_get_magic(service_args);
#if CTX_INCLUDE_MTE_REGS
/*
* Write a dummy value to an MTE register, to simulate usage in the
* secure world
*/
write_gcr_el1(0x99);
#endif
/* Determine the function to perform based on the function ID */
switch (TSP_BARE_FID(func)) {
case TSP_ADD:
results[0] += service_args[0];
results[1] += service_args[1];
break;
case TSP_SUB:
results[0] -= service_args[0];
results[1] -= service_args[1];
break;
case TSP_MUL:
results[0] *= service_args[0];
results[1] *= service_args[1];
break;
case TSP_DIV:
results[0] /= service_args[0] ? service_args[0] : 1;
results[1] /= service_args[1] ? service_args[1] : 1;
break;
default:
break;
}
return set_smc_args(func, 0,
results[0],
results[1],
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.
******************************************************************************/
tsp_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);
}