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Kernel/aarch64: Use the correct MMIO base address in the MMU

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Caoimhe 2023-05-26 14:04:32 +01:00 committed by Andrew Kaster
parent b0eff23a46
commit 360b8b166f
Notes: sideshowbarker 2024-07-17 10:10:18 +09:00 
Author: https://github.com/caoimhebyrne
Commit: https://github.com/SerenityOS/serenity/commit/360b8b166f
Pull-request: https://github.com/SerenityOS/serenity/pull/19058
Reviewed-by: https://github.com/BertalanD ✅
Reviewed-by: https://github.com/nico ✅
Reviewed-by: https://github.com/supercomputer7 ✅
1 changed files with 7 additions and 7 deletions
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14
Kernel/Arch/aarch64/MMU.cpp
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@ -32,11 +32,6 @@ namespace Kernel::Memory {
constexpr u32 START_OF_NORMAL_MEMORY = 0x00000000;
constexpr u32 END_OF_NORMAL_MEMORY = 0x3EFFFFFF;
// TODO: We should change the RPi drivers to use the MemoryManager to map physical memory,
// instead of mapping the complete MMIO region beforehand.
constexpr u32 START_OF_MMIO_MEMORY = 0x3F000000;
constexpr u32 END_OF_MMIO_MEMORY = 0x3F000000 + 0x00FFFFFF;
ALWAYS_INLINE static u64* descriptor_to_pointer(FlatPtr descriptor)
{
return (u64*)(descriptor & DESCRIPTOR_MASK);
@ -160,11 +155,16 @@ static void build_mappings(PageBumpAllocator& allocator, u64* root_table)
u64 normal_memory_flags = ACCESS_FLAG | PAGE_DESCRIPTOR | INNER_SHAREABLE | NORMAL_MEMORY;
u64 device_memory_flags = ACCESS_FLAG | PAGE_DESCRIPTOR | OUTER_SHAREABLE | DEVICE_MEMORY;
// TODO: We should change the RPi drivers to use the MemoryManager to map physical memory,
// instead of mapping the complete MMIO region beforehand.
auto mmio_base = RPi::MMIO::the().peripheral_base_address().get();
auto mmio_end = RPi::MMIO::the().peripheral_end_address().get();
// Align the identity mapping of the kernel image to 2 MiB, the rest of the memory is initially not mapped.
auto start_of_kernel_range = VirtualAddress((FlatPtr)start_of_kernel_image & ~(FlatPtr)0x1fffff);
auto end_of_kernel_range = VirtualAddress(((FlatPtr)end_of_kernel_image & ~(FlatPtr)0x1fffff) + 0x200000 - 1);
auto start_of_mmio_range = VirtualAddress(START_OF_MMIO_MEMORY + KERNEL_MAPPING_BASE);
auto end_of_mmio_range = VirtualAddress(END_OF_MMIO_MEMORY + KERNEL_MAPPING_BASE);
auto start_of_mmio_range = VirtualAddress(mmio_base + KERNEL_MAPPING_BASE);
auto end_of_mmio_range = VirtualAddress(mmio_end + KERNEL_MAPPING_BASE);
auto start_of_physical_kernel_range = PhysicalAddress(start_of_kernel_range.get()).offset(-KERNEL_MAPPING_BASE);
auto start_of_physical_mmio_range = PhysicalAddress(start_of_mmio_range.get()).offset(-KERNEL_MAPPING_BASE);