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Kernel: Change Region allocation helpers

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We now can create a cacheable Region, so when map() is called, if a
Region is cacheable then all the virtual memory space being allocated
to it will be marked as not cache disabled.

In addition to that, OS components can create a Region that will be
mapped to a specific physical address by using the appropriate helper
method.
This commit is contained in:
Liav A 2020-01-09 23:29:31 +02:00 • committed by Andreas Kling
parent b913e30011
commit d2b41010c5
7 changed files with 77 additions and 56 deletions
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3
Kernel/Process.cpp
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@ -1313,9 +1313,8 @@ extern "C" void asm_signal_trampoline_end(void);
void create_signal_trampolines()
{
InterruptDisabler disabler;
// NOTE: We leak this region.
auto* trampoline_region = MM.allocate_user_accessible_kernel_region(PAGE_SIZE, "Signal trampolines", Region::Access::Read | Region::Access::Write | Region::Access::Execute).leak_ptr();
auto* trampoline_region = MM.allocate_user_accessible_kernel_region(PAGE_SIZE, "Signal trampolines", Region::Access::Read | Region::Access::Write | Region::Access::Execute, false).leak_ptr();
g_return_to_ring3_from_signal_trampoline = trampoline_region->vaddr();
u8* trampoline = (u8*)asm_signal_trampoline;