3f75373584
Different architecture are doing this in custom ways and using different naming conventions, unify this interface and make it part of the arch implementation for SMP. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
82 lines
1.6 KiB
C
82 lines
1.6 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 <zephyr/linker/linker-defs.h>
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extern void z_arm64_mm_init(bool is_primary_core);
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__weak void z_arm64_mm_init(bool is_primary_core) { }
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/*
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* These simple memset/memcpy alternatives are necessary as the optimized
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* ones depend on the MMU to be active (see commit c5b898743a20).
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*/
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void z_early_memset(void *dst, int c, size_t n)
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{
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uint8_t *d = dst;
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while (n--) {
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*d++ = c;
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}
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}
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void z_early_memcpy(void *dst, const void *src, size_t n)
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{
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uint8_t *d = dst;
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const uint8_t *s = src;
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while (n--) {
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*d++ = *s++;
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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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*/
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void z_prep_c(void)
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{
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/* Initialize tpidrro_el0 with our struct _cpu instance address */
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write_tpidrro_el0((uintptr_t)&_kernel.cpus[0]);
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z_bss_zero();
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z_data_copy();
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#ifdef CONFIG_ARM64_SAFE_EXCEPTION_STACK
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/* After bss clean, _kernel.cpus is in bss section */
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z_arm64_safe_exception_stack_init();
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#endif
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z_arm64_mm_init(true);
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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_MAX_NUM_CPUS > 1
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extern FUNC_NORETURN void arch_secondary_cpu_init(void);
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void z_arm64_secondary_prep_c(void)
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{
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arch_secondary_cpu_init();
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CODE_UNREACHABLE;
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}
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#endif
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