Bananymous
/
banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Kernel: Actually map FACS (and global lock)

This commit is contained in:
Bananymous 2024-04-17 02:14:56 +03:00
parent 49b7467840
commit 0ad7025a17
1 changed files with 17 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
kernel/kernel/ACPI/ACPI.cpp
View File

@ -65,7 +65,6 @@ acpi_release_global_lock:
{
if (!s_global_lock)
return;
derrorln("Acquiring ACPI global lock");
ASSERT(acpi_acquire_global_lock(s_global_lock));
}
@ -73,7 +72,6 @@ acpi_release_global_lock:
{
if (!s_global_lock)
return;
derrorln("Releasing ACPI global lock");
ASSERT(!acpi_release_global_lock(s_global_lock));
}
@ -129,7 +127,23 @@ acpi_release_global_lock:
if (facs_addr)
{
auto* facs = reinterpret_cast<FACS*>(facs_addr);
size_t facs_size;
PageTable::with_fast_page(facs_addr & PAGE_ADDR_MASK, [&] {
facs_size = PageTable::fast_page_as<SDTHeader>(facs_addr % PAGE_SIZE).length;
});
size_t needed_pages = range_page_count(facs_addr, facs_size);
vaddr_t facs_vaddr = PageTable::kernel().reserve_free_contiguous_pages(needed_pages, KERNEL_OFFSET);
ASSERT(facs_vaddr);
PageTable::kernel().map_range_at(
facs_addr & PAGE_ADDR_MASK,
facs_vaddr,
needed_pages * PAGE_SIZE,
PageTable::Flags::ReadWrite | PageTable::Flags::Present
);
auto* facs = reinterpret_cast<FACS*>(facs_vaddr + (facs_addr % PAGE_SIZE));
s_global_lock = &facs->global_lock;
}
}