8915e41b7b
The current API was assuming too much, in that it expected that arch-specific memory domain configuration is only maintained in some global area, and updates to domains that are not currently active have no effect. This was true when all memory domain state was tracked in page tables or MPU registers, but no longer works when arch-specific memory management information is stored in thread-specific areas. This is needed for: #13441 #13074 #15135 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
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* Copyright (c) 2016 Wind River Systems, Inc.
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* this file is only meant to be included by kernel_structs.h */
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#ifndef ZEPHYR_ARCH_X86_INCLUDE_IA32_KERNEL_ARCH_FUNC_H_
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#define ZEPHYR_ARCH_X86_INCLUDE_IA32_KERNEL_ARCH_FUNC_H_
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#ifndef _ASMLANGUAGE
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* stack alignment related macros: STACK_ALIGN_SIZE is defined above */
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#define STACK_ROUND_UP(x) ROUND_UP(x, STACK_ALIGN_SIZE)
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#define STACK_ROUND_DOWN(x) ROUND_DOWN(x, STACK_ALIGN_SIZE)
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extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE);
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#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
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/* Setup ultra-minimal serial driver for printk() */
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void z_x86_early_serial_init(void);
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#endif
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/**
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*
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* @brief Performs architecture-specific initialization
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*
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* This routine performs architecture-specific initialization of the kernel.
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* Trivial stuff is done inline; more complex initialization is done via
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* function calls.
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*
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* @return N/A
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*/
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static inline void kernel_arch_init(void)
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{
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_kernel.nested = 0;
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_kernel.irq_stack = Z_THREAD_STACK_BUFFER(_interrupt_stack) +
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CONFIG_ISR_STACK_SIZE;
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#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
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z_x86_early_serial_init();
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#endif
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#if CONFIG_X86_STACK_PROTECTION
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z_x86_mmu_set_flags(&z_x86_kernel_pdpt, _interrupt_stack, MMU_PAGE_SIZE,
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MMU_ENTRY_READ, MMU_PTE_RW_MASK);
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#endif
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}
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/**
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*
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* @brief Set the return value for the specified thread (inline)
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*
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* @param thread pointer to thread
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* @param value value to set as return value
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*
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* The register used to store the return value from a function call invocation
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* is set to @a value. It is assumed that the specified @a thread is pending, and
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* thus the threads context is stored in its TCS.
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*
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* @return N/A
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*/
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static ALWAYS_INLINE void
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z_set_thread_return_value(struct k_thread *thread, unsigned int value)
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{
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/* write into 'eax' slot created in z_swap() entry */
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*(unsigned int *)(thread->callee_saved.esp) = value;
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}
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extern void k_cpu_atomic_idle(unsigned int key);
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extern FUNC_NORETURN void z_x86_userspace_enter(k_thread_entry_t user_entry,
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void *p1, void *p2, void *p3,
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u32_t stack_end,
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u32_t stack_start);
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/* Helper macros needed to be passed to x86_update_mem_domain_pages */
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#define X86_MEM_DOMAIN_SET_PAGES (0U)
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#define X86_MEM_DOMAIN_RESET_PAGES (1U)
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extern void z_x86_mem_domain_pages_update(struct k_mem_domain *mem_domain,
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u32_t page_conf);
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#include <stddef.h> /* For size_t */
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#ifdef __cplusplus
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}
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#endif
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#define z_is_in_isr() (_kernel.nested != 0U)
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_ARCH_X86_INCLUDE_IA32_KERNEL_ARCH_FUNC_H_ */
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