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< / pre > < pre class = "rust" > < code > < span class = "doccomment" > //! batch subsystem< / span >
< span class = "kw" > use< / span > < span class = "ident" > < span class = "kw" > crate< / span > ::sync::UPSafeCell< / span > ;
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< span class = "kw" > use< / span > < span class = "ident" > < span class = "kw" > crate< / span > ::trap::TrapContext< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > core::arch::asm< / span > ;
< span class = "kw" > use< / span > < span class = "ident" > lazy_static< / span > ::< span class = "kw-2" > *< / span > ;
< span class = "kw" > const< / span > < span class = "ident" > USER_STACK_SIZE< / span > : < span class = "ident" > usize< / span > < span class = "op" > =< / span > < span class = "number" > 4096< / span > < span class = "op" > *< / span > < span class = "number" > 2< / span > ;
< span class = "kw" > const< / span > < span class = "ident" > KERNEL_STACK_SIZE< / span > : < span class = "ident" > usize< / span > < span class = "op" > =< / span > < span class = "number" > 4096< / span > < span class = "op" > *< / span > < span class = "number" > 2< / span > ;
< span class = "kw" > const< / span > < span class = "ident" > MAX_APP_NUM< / span > : < span class = "ident" > usize< / span > < span class = "op" > =< / span > < span class = "number" > 16< / span > ;
< span class = "kw" > const< / span > < span class = "ident" > APP_BASE_ADDRESS< / span > : < span class = "ident" > usize< / span > < span class = "op" > =< / span > < span class = "number" > 0x80400000< / span > ;
< span class = "kw" > const< / span > < span class = "ident" > APP_SIZE_LIMIT< / span > : < span class = "ident" > usize< / span > < span class = "op" > =< / span > < span class = "number" > 0x20000< / span > ;
< span class = "attribute" > #[< span class = "ident" > repr< / span > (< span class = "ident" > align< / span > (< span class = "number" > 4096< / span > ))]< / span >
< span class = "kw" > struct< / span > < span class = "ident" > KernelStack< / span > {
< span class = "ident" > data< / span > : [< span class = "ident" > u8< / span > ; < span class = "ident" > KERNEL_STACK_SIZE< / span > ],
}
< span class = "attribute" > #[< span class = "ident" > repr< / span > (< span class = "ident" > align< / span > (< span class = "number" > 4096< / span > ))]< / span >
< span class = "kw" > struct< / span > < span class = "ident" > UserStack< / span > {
< span class = "ident" > data< / span > : [< span class = "ident" > u8< / span > ; < span class = "ident" > USER_STACK_SIZE< / span > ],
}
< span class = "kw" > static< / span > < span class = "ident" > KERNEL_STACK< / span > : < span class = "ident" > KernelStack< / span > < span class = "op" > =< / span > < span class = "ident" > KernelStack< / span > {
< span class = "ident" > data< / span > : [< span class = "number" > 0< / span > ; < span class = "ident" > KERNEL_STACK_SIZE< / span > ],
};
< span class = "kw" > static< / span > < span class = "ident" > USER_STACK< / span > : < span class = "ident" > UserStack< / span > < span class = "op" > =< / span > < span class = "ident" > UserStack< / span > {
< span class = "ident" > data< / span > : [< span class = "number" > 0< / span > ; < span class = "ident" > USER_STACK_SIZE< / span > ],
};
< span class = "kw" > impl< / span > < span class = "ident" > KernelStack< / span > {
< span class = "kw" > fn< / span > < span class = "ident" > get_sp< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > ) -> < span class = "ident" > usize< / span > {
< span class = "self" > self< / span > .< span class = "ident" > data< / span > .< span class = "ident" > as_ptr< / span > () < span class = "kw" > as< / span > < span class = "ident" > usize< / span > < span class = "op" > +< / span > < span class = "ident" > KERNEL_STACK_SIZE< / span >
}
< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > push_context< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > , < span class = "ident" > cx< / span > : < span class = "ident" > TrapContext< / span > ) -> < span class = "kw-2" > & < / span > < span class = "lifetime" > ' static< / span > < span class = "kw-2" > mut< / span > < span class = "ident" > TrapContext< / span > {
< span class = "kw" > let< / span > < span class = "ident" > cx_ptr< / span > < span class = "op" > =< / span > (< span class = "self" > self< / span > .< span class = "ident" > get_sp< / span > () < span class = "op" > -< / span > < span class = "ident" > core::mem::size_of< / span > ::< span class = "op" > < < / span > < span class = "ident" > TrapContext< / span > < span class = "op" > > < / span > ()) < span class = "kw" > as< / span > < span class = "kw-2" > *mut< / span > < span class = "ident" > TrapContext< / span > ;
< span class = "kw" > unsafe< / span > {
< span class = "kw-2" > *< / span > < span class = "ident" > cx_ptr< / span > < span class = "op" > =< / span > < span class = "ident" > cx< / span > ;
}
< span class = "kw" > unsafe< / span > { < span class = "ident" > cx_ptr< / span > .< span class = "ident" > as_mut< / span > ().< span class = "ident" > unwrap< / span > () }
}
}
< span class = "kw" > impl< / span > < span class = "ident" > UserStack< / span > {
< span class = "kw" > fn< / span > < span class = "ident" > get_sp< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > ) -> < span class = "ident" > usize< / span > {
< span class = "self" > self< / span > .< span class = "ident" > data< / span > .< span class = "ident" > as_ptr< / span > () < span class = "kw" > as< / span > < span class = "ident" > usize< / span > < span class = "op" > +< / span > < span class = "ident" > USER_STACK_SIZE< / span >
}
}
< span class = "kw" > struct< / span > < span class = "ident" > AppManager< / span > {
< span class = "ident" > num_app< / span > : < span class = "ident" > usize< / span > ,
< span class = "ident" > current_app< / span > : < span class = "ident" > usize< / span > ,
< span class = "ident" > app_start< / span > : [< span class = "ident" > usize< / span > ; < span class = "ident" > MAX_APP_NUM< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > ],
}
< span class = "kw" > impl< / span > < span class = "ident" > AppManager< / span > {
< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > print_app_info< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > ) {
< span class = "macro" > println!< / span > (< span class = "string" > " [kernel] num_app = {}" < / span > , < span class = "self" > self< / span > .< span class = "ident" > num_app< / span > );
< span class = "kw" > for< / span > < span class = "ident" > i< / span > < span class = "kw" > in< / span > < span class = "number" > 0< / span > ..< span class = "self" > self< / span > .< span class = "ident" > num_app< / span > {
< span class = "macro" > println!< / span > (
< span class = "string" > " [kernel] app_{} [{:#x}, {:#x})" < / span > ,
< span class = "ident" > i< / span > ,
< span class = "self" > self< / span > .< span class = "ident" > app_start< / span > [< span class = "ident" > i< / span > ],
< span class = "self" > self< / span > .< span class = "ident" > app_start< / span > [< span class = "ident" > i< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > ]
);
}
}
< span class = "kw" > unsafe< / span > < span class = "kw" > fn< / span > < span class = "ident" > load_app< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > , < span class = "ident" > app_id< / span > : < span class = "ident" > usize< / span > ) {
< span class = "kw" > if< / span > < span class = "ident" > app_id< / span > < span class = "op" > > < / span > < span class = "op" > =< / span > < span class = "self" > self< / span > .< span class = "ident" > num_app< / span > {
< span class = "macro" > panic!< / span > (< span class = "string" > " All applications completed!" < / span > );
}
< span class = "macro" > println!< / span > (< span class = "string" > " [kernel] Loading app_{}" < / span > , < span class = "ident" > app_id< / span > );
< span class = "comment" > // clear icache< / span >
< span class = "macro" > asm!< / span > (< span class = "string" > " fence.i" < / span > );
< span class = "comment" > // clear app area< / span >
< span class = "ident" > core::slice::from_raw_parts_mut< / span > (< span class = "ident" > APP_BASE_ADDRESS< / span > < span class = "kw" > as< / span > < span class = "kw-2" > *mut< / span > < span class = "ident" > u8< / span > , < span class = "ident" > APP_SIZE_LIMIT< / span > ).< span class = "ident" > fill< / span > (< span class = "number" > 0< / span > );
< span class = "kw" > let< / span > < span class = "ident" > app_src< / span > < span class = "op" > =< / span > < span class = "ident" > core::slice::from_raw_parts< / span > (
< span class = "self" > self< / span > .< span class = "ident" > app_start< / span > [< span class = "ident" > app_id< / span > ] < span class = "kw" > as< / span > < span class = "kw-2" > *const< / span > < span class = "ident" > u8< / span > ,
< span class = "self" > self< / span > .< span class = "ident" > app_start< / span > [< span class = "ident" > app_id< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > ] < span class = "op" > -< / span > < span class = "self" > self< / span > .< span class = "ident" > app_start< / span > [< span class = "ident" > app_id< / span > ],
);
< span class = "kw" > let< / span > < span class = "ident" > app_dst< / span > < span class = "op" > =< / span > < span class = "ident" > core::slice::from_raw_parts_mut< / span > (< span class = "ident" > APP_BASE_ADDRESS< / span > < span class = "kw" > as< / span > < span class = "kw-2" > *mut< / span > < span class = "ident" > u8< / span > , < span class = "ident" > app_src< / span > .< span class = "ident" > len< / span > ());
< span class = "ident" > app_dst< / span > .< span class = "ident" > copy_from_slice< / span > (< span class = "ident" > app_src< / span > );
}
< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > get_current_app< / span > (< span class = "kw-2" > & < / span > < span class = "self" > self< / span > ) -> < span class = "ident" > usize< / span > {
< span class = "self" > self< / span > .< span class = "ident" > current_app< / span >
}
< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > move_to_next_app< / span > (< span class = "kw-2" > & mut< / span > < span class = "self" > self< / span > ) {
< span class = "self" > self< / span > .< span class = "ident" > current_app< / span > < span class = "op" > +< / span > < span class = "op" > =< / span > < span class = "number" > 1< / span > ;
}
}
< span class = "macro" > lazy_static!< / span > {
< span class = "kw" > static< / span > < span class = "kw-2" > ref< / span > < span class = "ident" > APP_MANAGER< / span > : < span class = "ident" > UPSafeCell< / span > < span class = "op" > < < / span > < span class = "ident" > AppManager< / span > < span class = "op" > > < / span > < span class = "op" > =< / span > < span class = "kw" > unsafe< / span > {
< span class = "ident" > UPSafeCell::new< / span > ({
< span class = "kw" > extern< / span > < span class = "string" > " C" < / span > {
< span class = "kw" > fn< / span > < span class = "ident" > _num_app< / span > ();
}
< span class = "kw" > let< / span > < span class = "ident" > num_app_ptr< / span > < span class = "op" > =< / span > < span class = "ident" > _num_app< / span > < span class = "kw" > as< / span > < span class = "ident" > usize< / span > < span class = "kw" > as< / span > < span class = "kw-2" > *const< / span > < span class = "ident" > usize< / span > ;
< span class = "kw" > let< / span > < span class = "ident" > num_app< / span > < span class = "op" > =< / span > < span class = "ident" > num_app_ptr< / span > .< span class = "ident" > read_volatile< / span > ();
< span class = "kw" > let< / span > < span class = "kw-2" > mut< / span > < span class = "ident" > app_start< / span > : [< span class = "ident" > usize< / span > ; < span class = "ident" > MAX_APP_NUM< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > ] < span class = "op" > =< / span > [< span class = "number" > 0< / span > ; < span class = "ident" > MAX_APP_NUM< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > ];
< span class = "kw" > let< / span > < span class = "ident" > app_start_raw< / span > : < span class = "kw-2" > & < / span > [< span class = "ident" > usize< / span > ] < span class = "op" > =< / span >
< span class = "ident" > core::slice::from_raw_parts< / span > (< span class = "ident" > num_app_ptr< / span > .< span class = "ident" > add< / span > (< span class = "number" > 1< / span > ), < span class = "ident" > num_app< / span > < span class = "op" > +< / span > < span class = "number" > 1< / span > );
< span class = "ident" > app_start< / span > [..< span class = "op" > =< / span > < span class = "ident" > num_app< / span > ].< span class = "ident" > copy_from_slice< / span > (< span class = "ident" > app_start_raw< / span > );
< span class = "ident" > AppManager< / span > {
< span class = "ident" > num_app< / span > ,
< span class = "ident" > current_app< / span > : < span class = "number" > 0< / span > ,
< span class = "ident" > app_start< / span > ,
}
})
};
}
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< span class = "doccomment" > /// init batch subsystem< / span >
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< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > init< / span > () {
< span class = "ident" > print_app_info< / span > ();
}
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< span class = "doccomment" > /// print apps info< / span >
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< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > print_app_info< / span > () {
< span class = "ident" > APP_MANAGER< / span > .< span class = "ident" > exclusive_access< / span > ().< span class = "ident" > print_app_info< / span > ();
}
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< span class = "doccomment" > /// run next app< / span >
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< span class = "kw" > pub< / span > < span class = "kw" > fn< / span > < span class = "ident" > run_next_app< / span > () -> < span class = "op" > !< / span > {
< span class = "kw" > let< / span > < span class = "kw-2" > mut< / span > < span class = "ident" > app_manager< / span > < span class = "op" > =< / span > < span class = "ident" > APP_MANAGER< / span > .< span class = "ident" > exclusive_access< / span > ();
< span class = "kw" > let< / span > < span class = "ident" > current_app< / span > < span class = "op" > =< / span > < span class = "ident" > app_manager< / span > .< span class = "ident" > get_current_app< / span > ();
< span class = "kw" > unsafe< / span > {
< span class = "ident" > app_manager< / span > .< span class = "ident" > load_app< / span > (< span class = "ident" > current_app< / span > );
}
< span class = "ident" > app_manager< / span > .< span class = "ident" > move_to_next_app< / span > ();
< span class = "ident" > drop< / span > (< span class = "ident" > app_manager< / span > );
< span class = "comment" > // before this we have to drop local variables related to resources manually< / span >
< span class = "comment" > // and release the resources< / span >
< span class = "kw" > extern< / span > < span class = "string" > " C" < / span > {
< span class = "kw" > fn< / span > < span class = "ident" > __restore< / span > (< span class = "ident" > cx_addr< / span > : < span class = "ident" > usize< / span > );
}
< span class = "kw" > unsafe< / span > {
< span class = "ident" > __restore< / span > (< span class = "ident" > KERNEL_STACK< / span > .< span class = "ident" > push_context< / span > (< span class = "ident" > TrapContext::app_init_context< / span > (
< span class = "ident" > APP_BASE_ADDRESS< / span > ,
< span class = "ident" > USER_STACK< / span > .< span class = "ident" > get_sp< / span > (),
)) < span class = "kw" > as< / span > < span class = "kw-2" > *const< / span > < span class = "kw" > _< / span > < span class = "kw" > as< / span > < span class = "ident" > usize< / span > );
}
< span class = "macro" > panic!< / span > (< span class = "string" > " Unreachable in batch::run_current_app!" < / span > );
}
< / code > < / pre > < / div >
< / section > < section id = "search" class = "content hidden" > < / section > < / div > < / main > < div id = "rustdoc-vars" data-root-path = "../../" data-current-crate = "os" data-themes = "ayu,dark,light" data-resource-suffix = "" data-rustdoc-version = "1.60.0-nightly (9ad5d82f8 2022-01-18)" > < / div >
< / body > < / html >
