mirror of
https://github.com/zephyrproject-rtos/zephyr
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a5eea17dda
This is a naive implementation which does "eager" context switching for floating-point context, which, of course, introduces performance concerns. Other approaches have security concerns, SMP implications, and impact the x86 arch and Zephyr project as a whole. Discussion is needed, so punting with the straightforward solution for now. Signed-off-by: Charles E. Youse <charles.youse@intel.com>
34 lines
1006 B
C
34 lines
1006 B
C
/*
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* Copyright (c) 2019 Intel Corporation
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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 <ksched.h>
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#include <kernel_structs.h>
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#include <kernel_internal.h>
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extern void x86_sse_init(struct k_thread *); /* in locore.S */
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void z_new_thread(struct k_thread *thread, k_thread_stack_t *stack,
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size_t stack_size, k_thread_entry_t entry,
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void *parameter1, void *parameter2, void *parameter3,
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int priority, unsigned int options)
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{
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Z_ASSERT_VALID_PRIO(priority, entry);
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z_new_thread_init(thread, Z_THREAD_STACK_BUFFER(stack),
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stack_size, priority, options);
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thread->callee_saved.rsp = (long) Z_THREAD_STACK_BUFFER(stack);
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thread->callee_saved.rsp += (stack_size - 8); /* fake RIP for ABI */
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thread->callee_saved.rip = (long) z_thread_entry;
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thread->callee_saved.rflags = EFLAGS_INITIAL;
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thread->arch.rdi = (long) entry;
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thread->arch.rsi = (long) parameter1;
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thread->arch.rdx = (long) parameter2;
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thread->arch.rcx = (long) parameter3;
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x86_sse_init(thread);
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}
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