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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:13:47 +0000 |
commit | 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 (patch) | |
tree | bcf648efac40ca6139842707f0eba5a4496a6dd2 /plat/arm/board/corstone700/common/corstone700_helpers.S | |
parent | Initial commit. (diff) | |
download | arm-trusted-firmware-upstream.tar.xz arm-trusted-firmware-upstream.zip |
Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | plat/arm/board/corstone700/common/corstone700_helpers.S | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/plat/arm/board/corstone700/common/corstone700_helpers.S b/plat/arm/board/corstone700/common/corstone700_helpers.S new file mode 100644 index 0000000..c713f4f --- /dev/null +++ b/plat/arm/board/corstone700/common/corstone700_helpers.S @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2019, Arm Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <asm_macros.S> +#include <platform_def.h> + + .globl plat_secondary_cold_boot_setup + .globl plat_get_my_entrypoint + .globl plat_is_my_cpu_primary + .globl plat_arm_calc_core_pos + + /* -------------------------------------------------------------------- + * void plat_secondary_cold_boot_setup (void); + * + * For AArch32, cold-booting secondary CPUs is not yet + * implemented and they panic. + * -------------------------------------------------------------------- + */ +func plat_secondary_cold_boot_setup +cb_panic: + b cb_panic +endfunc plat_secondary_cold_boot_setup + + /* --------------------------------------------------------------------- + * unsigned long plat_get_my_entrypoint (void); + * + * Main job of this routine is to distinguish between a cold and warm + * boot. On Corstone700, this information can be queried from the power + * controller. The Power Control SYS Status Register (PSYSR) indicates + * the wake-up reason for the CPU. + * + * For a cold boot, return 0. + * For a warm boot, Not yet supported. + * + * TODO: PSYSR is a common register and should be + * accessed using locks. Since it is not possible + * to use locks immediately after a cold reset + * we are relying on the fact that after a cold + * reset all cpus will read the same WK field + * --------------------------------------------------------------------- + */ +func plat_get_my_entrypoint + /* TODO support warm boot */ + /* Cold reset */ + mov r0, #0 + bx lr +endfunc plat_get_my_entrypoint + + /* ----------------------------------------------------- + * unsigned int plat_is_my_cpu_primary (void); + * + * Find out whether the current CPU is the primary + * CPU. + * ----------------------------------------------------- + */ +func plat_is_my_cpu_primary + ldcopr r0, MPIDR + ldr r1, =MPIDR_AFFINITY_MASK + and r0, r1 + cmp r0, #0 + moveq r0, #1 + movne r0, #0 + bx lr +endfunc plat_is_my_cpu_primary + + /* --------------------------------------------------------------------- + * unsigned int plat_arm_calc_core_pos(u_register_t mpidr) + * + * Function to calculate the core position on Corstone700. + * + * (ClusterId * MAX_CPUS_PER_CLUSTER * MAX_PE_PER_CPU) + + * (CPUId * MAX_PE_PER_CPU) + + * ThreadId + * + * which can be simplified as: + * + * ((ClusterId * MAX_CPUS_PER_CLUSTER + CPUId) * MAX_PE_PER_CPU) + * + ThreadId + * --------------------------------------------------------------------- + */ +func plat_arm_calc_core_pos + mov r3, r0 + + /* Extract individual affinity fields from MPIDR */ + ubfx r0, r3, #MPIDR_AFF0_SHIFT, #MPIDR_AFFINITY_BITS + ubfx r1, r3, #MPIDR_AFF1_SHIFT, #MPIDR_AFFINITY_BITS + ubfx r2, r3, #MPIDR_AFF2_SHIFT, #MPIDR_AFFINITY_BITS + + /* Compute linear position */ + mov r3, #CORSTONE700_MAX_CPUS_PER_CLUSTER + mla r1, r2, r3, r1 + mov r3, #CORSTONE700_MAX_PE_PER_CPU + mla r0, r1, r3, r0 + + bx lr +endfunc plat_arm_calc_core_pos |