RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 08:27:46 +00:00
Code Issues Activity Actions

Kernel: Map PCI devices only once during boot

Browse source 
Instead of mapping a 4KB region to access device configuration space
each time we call one of the PCI helpers, just map them once during
the boot process.
Then, if we request to access one of those devices, we can ask the
PCI subsystem to give us the virtual address where the device's
configuration space is mapped.
This commit is contained in:
Liav A 2020-10-31 22:24:01 +02:00 • committed by Andreas Kling
parent 0aeef47abd
commit 6131048a5f
4 changed files with 95 additions and 60 deletions
Download patch file Download diff file Expand all files Collapse all files

5
Kernel/PCI/Access.h
View file

@ -63,6 +63,11 @@ public:
protected:
virtual void enumerate_hardware(Function<void(Address, ID)>) = 0;
u8 early_read8_field(Address address, u32 field);
u16 early_read16_field(Address address, u32 field);
u32 early_read32_field(Address address, u32 field);
u16 early_read_type(Address address);
Access();
Vector<PhysicalID> m_physical_ids;
};