fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-02-23 08:06:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Stop allocating physical pages for mapped MMIO regions

Browse Source 
As MMIO is placed at fixed physical addressed, and does not need to be
backed by real RAM physical pages, there's no need to use PhysicalPage
instances to track their pages.
This results in slightly reduced allocations, but more importantly
makes MMIO addresses which end up after the normal RAM ranges work,
like 64-bit PCI BARs usually are.
This commit is contained in:
Idan Horowitz
2024-05-10 23:16:01 +03:00
committed by Andrew Kaster
parent d0555f3176
commit 827322c139
21 changed files with 136 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Kernel/Devices/GPU/Console/ContiguousFramebufferConsole.cpp
View File

@@ -29,7 +29,7 @@ void ContiguousFramebufferConsole::set_resolution(size_t width, size_t height, s
size_t size = Memory::page_round_up(pitch * height).release_value_but_fixme_should_propagate_errors();
dbgln("Framebuffer Console: taking {} bytes", size);
auto region_or_error = MM.allocate_kernel_region(m_framebuffer_address, size, "Framebuffer Console"sv, Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::Yes);
auto region_or_error = MM.allocate_mmio_kernel_region(m_framebuffer_address, size, "Framebuffer Console"sv, Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::Yes);
VERIFY(!region_or_error.is_error());
m_framebuffer_region = region_or_error.release_value();