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Kernel: RSDP location is now done with virtual addresses

This commit is contained in:
Bananymous 2023-05-31 00:34:21 +03:00
parent 1f2fd59ad5
commit 911922c6a3
1 changed files with 3 additions and 3 deletions
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6
kernel/kernel/ACPI.cpp
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@ -82,7 +82,7 @@ namespace Kernel
static const RSDP* locate_rsdp()
{
// Look in main BIOS area below 1 MB
for (uintptr_t addr = 0x000E0000; addr < 0x000FFFFF; addr += 16)
for (uintptr_t addr = P2V(0x000E0000); addr < P2V(0x000FFFFF); addr += 16)
if (is_rsdp(addr))
return (const RSDP*)addr;
return nullptr;
@ -120,8 +120,8 @@ namespace Kernel
else
{
const RSDT* rsdt = (const RSDT*)(uintptr_t)rsdp->rsdt_address;
PageTable::kernel().identity_map_page((uintptr_t)rsdt, PageTable::Flags::Present);
BAN::ScopeGuard _([rsdt] { PageTable::kernel().unmap_page((uintptr_t)rsdt); });
PageTable::kernel().identity_map_page((vaddr_t)rsdt, PageTable::Flags::Present);
BAN::ScopeGuard _([rsdt] { PageTable::kernel().unmap_page((vaddr_t)rsdt); });
if (memcmp(rsdt->signature, "RSDT", 4) != 0)
return BAN::Error::from_error_code(ErrorCode::ACPI_RootInvalid);