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Map TSS using RMM

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This commit is contained in:
Jeremy Soller
2021-05-07 09:13:25 -06:00
parent 77f6887fbc
commit 8130e4752b
1 changed files with 22 additions and 17 deletions
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39
src/arch/aarch64/paging/mod.rs
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@@ -74,7 +74,7 @@ unsafe fn init_mair() {
}
/// Map TSS
unsafe fn map_tss(cpu_id: usize, mapper: &mut Mapper) -> PageFlushAll<RmmA> {
unsafe fn map_tss(cpu_id: usize) {
extern "C" {
/// The starting byte of the thread data segment
static mut __tdata_start: u8;
@@ -90,14 +90,18 @@ unsafe fn map_tss(cpu_id: usize, mapper: &mut Mapper) -> PageFlushAll<RmmA> {
let start = crate::KERNEL_PERCPU_OFFSET + crate::KERNEL_PERCPU_SIZE * cpu_id;
let end = start + size;
let mut mapper = crate::rmm::mapper_current();
let flush_all = PageFlushAll::new();
let start_page = Page::containing_address(VirtualAddress::new(start));
let end_page = Page::containing_address(VirtualAddress::new(end - 1));
for page in Page::range_inclusive(start_page, end_page) {
let result = mapper.map(page, PageFlags::new().write(true));
let result = mapper.map(
page.start_address(),
PageFlags::new().write(true)
).expect("Failed to map TSS page");
flush_all.consume(result);
}
flush_all
flush_all.flush();
}
/// Copy tdata, clear tbss, set TCB self pointer
@@ -169,14 +173,23 @@ pub unsafe fn init(
static mut __bss_end: u8;
}
println!("INIT MAIR START");
init_mair();
println!("INIT MAIR COMPLETE");
let mut active_table = ActivePageTable::new_unlocked(TableKind::Kernel);
println!("ACTIVE TABLE START");
let active_table = ActivePageTable::new_unlocked(TableKind::Kernel);
println!("ACTIVE TABLE COMPLETE");
let flush_all = map_tss(cpu_id, &mut active_table);
flush_all.flush();
println!("MAP TSS START");
map_tss(cpu_id);
println!("MAP TSS COMPLETE");
return (active_table, init_tcb(cpu_id));
println!("INIT TCB START");
let tcb = init_tcb(cpu_id);
println!("INIT_TCB COMPLETE");
return (active_table, tcb);
}
pub unsafe fn init_ap(
@@ -189,20 +202,12 @@ pub unsafe fn init_ap(
let mut new_table = InactivePageTable::from_address(bsp_table);
let mut temporary_page = TemporaryPage::new(Page::containing_address(VirtualAddress::new(
crate::KERNEL_TMP_MISC_OFFSET,
)));
active_table.with(&mut new_table, &mut temporary_page, |mapper| {
let flush_all = map_tss(cpu_id, mapper);
// The flush can be ignored as this is not the active table. See later active_table.switch
flush_all.ignore();
});
// This switches the active table, which is setup by the bootloader, to a correct table
// setup by the lambda above. This will also flush the TLB
active_table.switch(new_table);
map_tss(cpu_id);
init_tcb(cpu_id)
}