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>
68 lines
1.2 KiB
C
68 lines
1.2 KiB
C
/*
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* Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file
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* @brief Full C support initialization
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*
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* Initialization of full C support: zero the .bss and call z_cstart().
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*
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* Stack is available in this module, but not the global data/bss until their
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* initialization is performed.
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*/
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#include <kernel_internal.h>
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#include <linker/linker-defs.h>
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extern FUNC_NORETURN void z_cstart(void);
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#ifdef CONFIG_ARM_MMU
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extern void z_arm64_mmu_init(void);
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#else
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static inline void z_arm64_mmu_init(void) { }
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#endif
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static inline void z_arm64_bss_zero(void)
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{
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uint64_t *p = (uint64_t *)__bss_start;
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uint64_t *end = (uint64_t *)__bss_end;
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while (p < end) {
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*p++ = 0;
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}
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}
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/**
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*
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* @brief Prepare to and run C code
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*
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* This routine prepares for the execution of and runs C code.
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*
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* @return N/A
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*/
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void z_arm64_prep_c(void)
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{
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z_arm64_bss_zero();
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#ifdef CONFIG_XIP
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z_data_copy();
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#endif
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z_arm64_mmu_init();
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z_arm64_interrupt_init();
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z_cstart();
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CODE_UNREACHABLE;
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}
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#if CONFIG_MP_NUM_CPUS > 1
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extern FUNC_NORETURN void z_arm64_secondary_start(void);
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void z_arm64_secondary_prep_c(void)
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{
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z_arm64_secondary_start();
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CODE_UNREACHABLE;
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}
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#endif
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