diff options
Diffstat (limited to 'plat/intel/soc/common/aarch64/plat_helpers.S')
| -rw-r--r-- | plat/intel/soc/common/aarch64/plat_helpers.S | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/plat/intel/soc/common/aarch64/plat_helpers.S b/plat/intel/soc/common/aarch64/plat_helpers.S new file mode 100644 index 0000000..213fd3c --- /dev/null +++ b/plat/intel/soc/common/aarch64/plat_helpers.S @@ -0,0 +1,150 @@ +/* + * Copyright (c) 2019, 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> +#include <el3_common_macros.S> + + .globl plat_secondary_cold_boot_setup + .globl platform_is_primary_cpu + .globl plat_is_my_cpu_primary + .globl plat_my_core_pos + .globl plat_crash_console_init + .globl plat_crash_console_putc + .globl plat_crash_console_flush + .globl platform_mem_init + .globl plat_secondary_cpus_bl31_entry + + .globl plat_get_my_entrypoint + + /* ----------------------------------------------------- + * void plat_secondary_cold_boot_setup (void); + * + * This function performs any platform specific actions + * needed for a secondary cpu after a cold reset e.g + * mark the cpu's presence, mechanism to place it in a + * holding pen etc. + * ----------------------------------------------------- + */ +func plat_secondary_cold_boot_setup + /* Wait until the it gets reset signal from rstmgr gets populated */ +poll_mailbox: + wfi + mov_imm x0, PLAT_SEC_ENTRY + ldr x1, [x0] + mov_imm x2, PLAT_CPUID_RELEASE + ldr x3, [x2] + mrs x4, mpidr_el1 + and x4, x4, #0xff + cmp x3, x4 + b.ne poll_mailbox + br x1 +endfunc plat_secondary_cold_boot_setup + +func platform_is_primary_cpu + and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) + cmp x0, #PLAT_PRIMARY_CPU + cset x0, eq + ret +endfunc platform_is_primary_cpu + +func plat_is_my_cpu_primary + mrs x0, mpidr_el1 + b platform_is_primary_cpu +endfunc plat_is_my_cpu_primary + +func plat_my_core_pos + mrs x0, mpidr_el1 + and x1, x0, #MPIDR_CPU_MASK + and x0, x0, #MPIDR_CLUSTER_MASK + add x0, x1, x0, LSR #6 + ret +endfunc plat_my_core_pos + +func warm_reset_req + str xzr, [x4] + bl plat_is_my_cpu_primary + cbz x0, cpu_in_wfi + mov_imm x1, PLAT_SEC_ENTRY + str xzr, [x1] + mrs x1, rmr_el3 + orr x1, x1, #0x02 + msr rmr_el3, x1 + isb + dsb sy +cpu_in_wfi: + wfi + b cpu_in_wfi +endfunc warm_reset_req + +func plat_get_my_entrypoint + ldr x4, =L2_RESET_DONE_REG + ldr x5, [x4] + ldr x1, =L2_RESET_DONE_STATUS + cmp x1, x5 + b.eq warm_reset_req + mov_imm x1, PLAT_SEC_ENTRY + ldr x0, [x1] + ret +endfunc plat_get_my_entrypoint + + + /* --------------------------------------------- + * int plat_crash_console_init(void) + * Function to initialize the crash console + * without a C Runtime to print crash report. + * Clobber list : x0, x1, x2 + * --------------------------------------------- + */ +func plat_crash_console_init + mov_imm x0, CRASH_CONSOLE_BASE + mov_imm x1, PLAT_UART_CLOCK + mov_imm x2, PLAT_BAUDRATE + b console_16550_core_init +endfunc plat_crash_console_init + + /* --------------------------------------------- + * int plat_crash_console_putc(void) + * Function to print a character on the crash + * console without a C Runtime. + * Clobber list : x1, x2 + * --------------------------------------------- + */ +func plat_crash_console_putc + mov_imm x1, CRASH_CONSOLE_BASE + b console_16550_core_putc +endfunc plat_crash_console_putc + +func plat_crash_console_flush + mov_imm x0, CRASH_CONSOLE_BASE + b console_16550_core_flush +endfunc plat_crash_console_flush + + + /* -------------------------------------------------------- + * void platform_mem_init (void); + * + * Any memory init, relocation to be done before the + * platform boots. Called very early in the boot process. + * -------------------------------------------------------- + */ +func platform_mem_init + mov x0, #0 + ret +endfunc platform_mem_init + +func plat_secondary_cpus_bl31_entry + el3_entrypoint_common \ + _init_sctlr=0 \ + _warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \ + _secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \ + _init_memory=1 \ + _init_c_runtime=1 \ + _exception_vectors=runtime_exceptions \ + _pie_fixup_size=BL31_LIMIT - BL31_BASE +endfunc plat_secondary_cpus_bl31_entry |