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827322c139
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.
43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/GPU/Console/ContiguousFramebufferConsole.h>
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#include <Kernel/Devices/TTY/ConsoleManagement.h>
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namespace Kernel::Graphics {
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NonnullLockRefPtr<ContiguousFramebufferConsole> ContiguousFramebufferConsole::initialize(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
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{
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return adopt_lock_ref(*new ContiguousFramebufferConsole(framebuffer_address, width, height, pitch));
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}
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ContiguousFramebufferConsole::ContiguousFramebufferConsole(PhysicalAddress framebuffer_address, size_t width, size_t height, size_t pitch)
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: GenericFramebufferConsole(width, height, pitch)
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, m_framebuffer_address(framebuffer_address)
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{
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set_resolution(width, height, pitch);
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}
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void ContiguousFramebufferConsole::set_resolution(size_t width, size_t height, size_t pitch)
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{
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m_width = width;
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m_height = height;
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m_pitch = pitch;
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size_t size = Memory::page_round_up(pitch * height).release_value_but_fixme_should_propagate_errors();
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dbgln("Framebuffer Console: taking {} bytes", size);
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auto region_or_error = MM.allocate_mmio_kernel_region(m_framebuffer_address, size, "Framebuffer Console"sv, Memory::Region::Access::ReadWrite, Memory::Region::Cacheable::Yes);
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VERIFY(!region_or_error.is_error());
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m_framebuffer_region = region_or_error.release_value();
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// Just to start cleanly, we clean the entire framebuffer
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memset(m_framebuffer_region->vaddr().as_ptr(), 0, pitch * height);
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ConsoleManagement::the().resolution_was_changed();
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}
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}
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