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Kernel: Add typed_map<T>(PhysicalAddress) and use it in ACPI parsing

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There was a frequently occurring pattern of "map this physical address
into kernel VM, then read from it, then unmap it again".

This new typed_map() encapsulates that logic by giving you back a
typed pointer to the kind of structure you're interested in accessing.

It returns a TypedMapping<T> that can be used mostly like a pointer.
When destroyed, the TypedMapping object will unmap the memory. :^)
This commit is contained in:
Andreas Kling 2020-04-09 17:12:58 +02:00
parent 4644217094
commit f614f0e2cb
5 changed files with 140 additions and 98 deletions
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2
Kernel/Interrupts/InterruptManagement.cpp
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@ -127,7 +127,7 @@ RefPtr<IRQController> InterruptManagement::get_responsible_irq_controller(u8 int
PhysicalAddress InterruptManagement::search_for_madt()
{
dbg() << "Early access to ACPI tables for interrupt setup";
auto rsdp = ACPI::StaticParsing::search_rsdp();
auto rsdp = ACPI::StaticParsing::find_rsdp();
if (rsdp.is_null())
return {};
return ACPI::StaticParsing::search_table(rsdp, "APIC");