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Kernel: Add bar_address_mask to mask the last 4 bits of a BAR address

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Create a bar_address_mask constant to mask the last 4 bits of a BAR
address instead of hand coding the mask all over the kernel.
This commit is contained in:
Pankaj Raghav 2023-04-24 12:32:12 +02:00 • committed by Jelle Raaijmakers
parent 20d517f1da
commit 83b87a5ade
Notes: sideshowbarker 2024-07-17 00:37:23 +09:00
8 changed files with 14 additions and 15 deletions
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4
Kernel/Graphics/Intel/NativeGraphicsAdapter.cpp
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@ -47,8 +47,8 @@ ErrorOr<void> IntelNativeGraphicsAdapter::initialize_adapter()
dmesgln_pci(*this, "framebuffer @ {}", PhysicalAddress(PCI::get_BAR2(device_identifier())));
using MMIORegion = IntelDisplayConnectorGroup::MMIORegion;
MMIORegion first_region { MMIORegion::BARAssigned::BAR0, PhysicalAddress(PCI::get_BAR0(device_identifier()) & 0xfffffff0), bar0_space_size };
MMIORegion second_region { MMIORegion::BARAssigned::BAR2, PhysicalAddress(PCI::get_BAR2(device_identifier()) & 0xfffffff0), bar2_space_size };
MMIORegion first_region { MMIORegion::BARAssigned::BAR0, PhysicalAddress(PCI::get_BAR0(device_identifier()) & PCI::bar_address_mask), bar0_space_size };
MMIORegion second_region { MMIORegion::BARAssigned::BAR2, PhysicalAddress(PCI::get_BAR2(device_identifier()) & PCI::bar_address_mask), bar2_space_size };
PCI::enable_bus_mastering(device_identifier());
PCI::enable_io_space(device_identifier());