3539c2fbb3
Split ARM and ARM64 architectures. Details: - CONFIG_ARM64 is decoupled from CONFIG_ARM (not a subset anymore) - Arch and include AArch64 files are in a dedicated directory (arch/arm64 and include/arch/arm64) - AArch64 boards and SoC are moved to soc/arm64 and boards/arm64 - AArch64-specific DTS files are moved to dts/arm64 - The A72 support for the bcm_vk/viper board is moved in the boards/bcm_vk/viper directory Signed-off-by: Carlo Caione <ccaione@baylibre.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
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* Copyright (c) 2020 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <kernel_structs.h>
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#include <kernel_internal.h>
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#include <kernel_tls.h>
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#include <app_memory/app_memdomain.h>
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#include <sys/util.h>
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size_t arch_tls_stack_setup(struct k_thread *new_thread, char *stack_ptr)
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{
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/*
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* TLS area for ARM has some data fields following by
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* thread data and bss. These fields are supposed to be
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* used by toolchain and OS TLS code to aid in locating
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* the TLS data/bss. Zephyr currently has no use for
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* this so we can simply skip these. However, since GCC
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* is generating code assuming these fields are there,
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* we simply skip them when setting the TLS pointer.
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*/
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/*
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* Since we are populating things backwards,
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* setup the TLS data/bss area first.
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*/
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stack_ptr -= z_tls_data_size();
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z_tls_copy(stack_ptr);
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/* Skip two pointers due to toolchain */
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stack_ptr -= sizeof(uintptr_t) * 2;
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/*
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* Set thread TLS pointer which is used in
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* context switch to point to TLS area.
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*/
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new_thread->tls = POINTER_TO_UINT(stack_ptr);
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return (z_tls_data_size() + (sizeof(uintptr_t) * 2));
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}
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