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Kernel: Remove ACPI::StaticParsing find_table code

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After the previous commit this went unused.
This commit is contained in:
Undefine authored and Sönke Holz committed 2026-10-21 19:03:12 +02:00
1 parent b854c700be
commit a44aa4baee
2 files changed
-74
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Kernel/Firmware/ACPI/StaticParsing.cpp
-70
View File
@@ -30,74 +30,4 @@ Optional<PhysicalAddress> find_rsdp()
return rsdp;
}
static bool match_table_signature(PhysicalAddress table_header, StringView signature)
{
VERIFY(signature.length() == 4);
auto check_in_region = [&](size_t length, auto&& callback) -> bool {
auto region = Memory::map_typed<u8 const>(table_header, length).release_value_but_fixme_should_propagate_errors();
return callback(region.ptr());
};
u32 length = 0;
auto check_signature_and_get_length = [&](u8 const* base) -> bool {
if (memcmp(reinterpret_cast<char const*>(base), signature.characters_without_null_termination(), 4) != 0)
return false;
length = ByteReader::load32(base + 4);
return true;
};
auto validate_checksum = [&](u8 const* base) -> bool {
u8 checksum = 0;
for (u32 i = 0; i < length; ++i)
checksum += base[i];
return checksum == 0;
};
return check_in_region(8, check_signature_and_get_length) && check_in_region(length, validate_checksum);
}
ErrorOr<Optional<PhysicalAddress>> search_table_in_xsdt(PhysicalAddress xsdt_address, StringView signature)
{
VERIFY(signature.length() == 4);
auto xsdt = TRY(Memory::map_typed<::ACPI::Structures::XSDT>(xsdt_address));
for (size_t i = 0; i < ((xsdt->h.length - sizeof(::ACPI::Structures::SDTHeader)) / sizeof(u64)); ++i) {
if (match_table_signature(PhysicalAddress((PhysicalPtr)xsdt->table_ptrs[i]), signature))
return PhysicalAddress((PhysicalPtr)xsdt->table_ptrs[i]);
}
return Optional<PhysicalAddress> {};
}
ErrorOr<Optional<PhysicalAddress>> find_table(PhysicalAddress rsdp_address, StringView signature)
{
VERIFY(signature.length() == 4);
auto rsdp = TRY(Memory::map_typed<::ACPI::Structures::RSDPDescriptor20>(rsdp_address));
if (rsdp->base.revision == 0)
return search_table_in_rsdt(PhysicalAddress(rsdp->base.rsdt_ptr), signature);
if (rsdp->base.revision >= 2) {
if (rsdp->xsdt_ptr)
return search_table_in_xsdt(PhysicalAddress(rsdp->xsdt_ptr), signature);
return search_table_in_rsdt(PhysicalAddress(rsdp->base.rsdt_ptr), signature);
}
VERIFY_NOT_REACHED();
}
ErrorOr<Optional<PhysicalAddress>> search_table_in_rsdt(PhysicalAddress rsdt_address, StringView signature)
{
VERIFY(signature.length() == 4);
auto rsdt = TRY(Memory::map_typed<::ACPI::Structures::RSDT>(rsdt_address));
for (u32 i = 0; i < ((rsdt->h.length - sizeof(::ACPI::Structures::SDTHeader)) / sizeof(u32)); i++) {
if (match_table_signature(PhysicalAddress((PhysicalPtr)rsdt->table_ptrs[i]), signature))
return PhysicalAddress((PhysicalPtr)rsdt->table_ptrs[i]);
}
return Optional<PhysicalAddress> {};
}
}
Kernel/Firmware/ACPI/StaticParsing.h
-4
View File
@@ -14,8 +14,4 @@
namespace Kernel::ACPI::StaticParsing {
Optional<PhysicalAddress> find_rsdp();
ErrorOr<Optional<PhysicalAddress>> find_table(PhysicalAddress rsdp, StringView signature);
ErrorOr<Optional<PhysicalAddress>> search_table_in_xsdt(PhysicalAddress xsdt, StringView signature);
ErrorOr<Optional<PhysicalAddress>> search_table_in_rsdt(PhysicalAddress rsdt, StringView signature);
}