32 lines
1.2 KiB
C
32 lines
1.2 KiB
C
#ifndef KERNEL_X86_64_THREAD_H_
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#define KERNEL_X86_64_THREAD_H_
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#include <kernel/sched.h>
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struct ml_cpu_context;
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/* switch from one thread to another. the stack of the `to` thread must have
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* been prepared in one of two ways:
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* 1) a previous call to ml_thread_switch where it was the `from` thread.
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* 2) a call to ml_thread_prepare_kernel_context
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* the switch occurs entirely with kernel mode. a further return from an
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* interrupt context is then used to return to usermode if necessary.
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*/
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extern void ml_thread_switch(struct thread *from, struct thread *to);
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/* perform the initial transition to userspace. the stack must be prepared using
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* ml_thread_prepare_user_context before this function can be used */
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extern void ml_thread_switch_user(void);
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/* prepare the stack so that ml_thread_switch can jump to the specified IP/SP */
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extern void ml_thread_prepare_kernel_context(uintptr_t ip, uintptr_t *sp);
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/* prepare the stack so that ml_thread_switch_user can jump to usermode
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* with the specified IP/user SP */
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extern kern_status_t ml_thread_prepare_user_context(
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virt_addr_t ip,
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virt_addr_t user_sp,
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virt_addr_t *kernel_sp,
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const uintptr_t *args,
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size_t nr_args);
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#endif
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