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06b09f34ed
* update * 添加rt调度器的rust初步实现 * 完善rt调度逻辑 * 调试rt调度器 * 修改sched的返回值 * cargo fmt 格式化 * 删除无用代码，修补rt bug * 删除无用的代码，和重复的逻辑 * 软中断bugfix * 删除一些代码 * 添加kthread_run_rt文档 * 解决sphinix警告_static目录不存在的问题 Co-authored-by: longjin <longjin@RinGoTek.cn>
29 lines
734 B
Rust
29 lines
734 B
Rust
pub mod barrier;
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use crate::include::bindings::bindings::process_control_block;
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use core::arch::asm;
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use core::ptr::read_volatile;
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use self::barrier::mfence;
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/// @brief 切换进程的页表
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///
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/// @param 下一个进程的pcb。将会把它的页表切换进来。
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///
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/// @return 下一个进程的pcb(把它return的目的主要是为了归还所有权)
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#[inline(always)]
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#[allow(dead_code)]
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pub fn switch_mm(
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next_pcb: &'static mut process_control_block,
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) -> &'static mut process_control_block {
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mfence();
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// kdebug!("to get pml4t");
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let pml4t = unsafe { read_volatile(&next_pcb.mm.as_ref().unwrap().pgd) };
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unsafe {
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asm!("mov cr3, {}", in(reg) pml4t);
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}
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mfence();
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return next_pcb;
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}
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