diff options
Diffstat (limited to 'plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S')
| -rw-r--r-- | plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S b/plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S new file mode 100644 index 0000000..65aab52 --- /dev/null +++ b/plat/xilinx/zynqmp/aarch64/zynqmp_helpers.S @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2013-2020, Arm Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <asm_macros.S> +#include <drivers/arm/gicv2.h> +#include <platform_def.h> + + .globl plat_secondary_cold_boot_setup + .globl plat_is_my_cpu_primary + .globl zynqmp_calc_core_pos + .globl plat_my_core_pos + .globl platform_mem_init + + /* ----------------------------------------------------- + * 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. + * TODO: Should we read the PSYS register to make sure + * that the request has gone through. + * ----------------------------------------------------- + */ +func plat_secondary_cold_boot_setup + mrs x0, mpidr_el1 + + /* Deactivate the gic cpu interface */ + ldr x1, =BASE_GICC_BASE + mov w0, #(IRQ_BYP_DIS_GRP1 | FIQ_BYP_DIS_GRP1) + orr w0, w0, #(IRQ_BYP_DIS_GRP0 | FIQ_BYP_DIS_GRP0) + str w0, [x1, #GICC_CTLR] + + /* + * There is no sane reason to come out of this wfi. This + * cpu will be powered on and reset by the cpu_on pm api + */ + dsb sy +1: + no_ret plat_panic_handler +endfunc plat_secondary_cold_boot_setup + +func plat_is_my_cpu_primary + mov x9, x30 + bl plat_my_core_pos + cmp x0, #ZYNQMP_PRIMARY_CPU + cset x0, eq + ret x9 +endfunc plat_is_my_cpu_primary + + /* ----------------------------------------------------- + * unsigned int plat_my_core_pos(void) + * This function uses the zynqmp_calc_core_pos() + * definition to get the index of the calling CPU. + * ----------------------------------------------------- + */ +func plat_my_core_pos + mrs x0, mpidr_el1 + b zynqmp_calc_core_pos +endfunc plat_my_core_pos + + /* ----------------------------------------------------- + * unsigned int zynqmp_calc_core_pos(u_register_t mpidr) + * Helper function to calculate the core position. + * With this function: CorePos = (ClusterId * 4) + + * CoreId + * ----------------------------------------------------- + */ +func zynqmp_calc_core_pos + and x1, x0, #MPIDR_CPU_MASK + and x0, x0, #MPIDR_CLUSTER_MASK + add x0, x1, x0, LSR #6 + ret +endfunc zynqmp_calc_core_pos + + /* --------------------------------------------------------------------- + * We don't need to carry out any memory initialization on ARM + * platforms. The Secure RAM is accessible straight away. + * --------------------------------------------------------------------- + */ +func platform_mem_init + ret +endfunc platform_mem_init |