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Kernel: MMU::get() is now MMU::kernel

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MMU is can now be locked with RecursiveSpinLock.

Scheduler now has get_current_tid() that works before the Scheduler
is initialized. This allows RecursiveSpinLock usage early on.
This commit is contained in:
Bananymous
2023-05-28 16:18:18 +03:00
parent a2ee543fa1
commit 869de7283f
11 changed files with 100 additions and 63 deletions
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14
kernel/kernel/ACPI.cpp
View File

@@ -105,8 +105,8 @@ namespace Kernel
if (rsdp->revision >= 2)
{
const XSDT* xsdt = (const XSDT*)rsdp->xsdt_address;
MMU::get().identity_map_page((uintptr_t)xsdt, MMU::Flags::Present);
BAN::ScopeGuard _([xsdt] { MMU::get().unmap_page((uintptr_t)xsdt); });
MMU::kernel().identity_map_page((uintptr_t)xsdt, MMU::Flags::Present);
BAN::ScopeGuard _([xsdt] { MMU::kernel().unmap_page((uintptr_t)xsdt); });
if (memcmp(xsdt->signature, "XSDT", 4) != 0)
return BAN::Error::from_error_code(ErrorCode::ACPI_RootInvalid);
@@ -120,8 +120,8 @@ namespace Kernel
else
{
const RSDT* rsdt = (const RSDT*)(uintptr_t)rsdp->rsdt_address;
MMU::get().identity_map_page((uintptr_t)rsdt, MMU::Flags::Present);
BAN::ScopeGuard _([rsdt] { MMU::get().unmap_page((uintptr_t)rsdt); });
MMU::kernel().identity_map_page((uintptr_t)rsdt, MMU::Flags::Present);
BAN::ScopeGuard _([rsdt] { MMU::kernel().unmap_page((uintptr_t)rsdt); });
if (memcmp(rsdt->signature, "RSDT", 4) != 0)
return BAN::Error::from_error_code(ErrorCode::ACPI_RootInvalid);
@@ -133,13 +133,13 @@ namespace Kernel
m_entry_count = (rsdt->length - sizeof(SDTHeader)) / 4;
}
MMU::get().identity_map_range(m_header_table, m_entry_count * m_entry_size, MMU::Flags::Present);
MMU::kernel().identity_map_range(m_header_table, m_entry_count * m_entry_size, MMU::Flags::Present);
for (uint32_t i = 0; i < m_entry_count; i++)
{
auto* header = get_header_from_index(i);
MMU::get().identity_map_page((uintptr_t)header, MMU::Flags::Present);
MMU::get().identity_map_range((uintptr_t)header, header->length, MMU::Flags::Present);
MMU::kernel().identity_map_page((uintptr_t)header, MMU::Flags::Present);
MMU::kernel().identity_map_range((uintptr_t)header, header->length, MMU::Flags::Present);
}
return {};

4
kernel/kernel/APIC.cpp
View File

@@ -146,10 +146,10 @@ APIC* APIC::create()
return nullptr;
}
MMU::get().identity_map_page(apic->m_local_apic, MMU::Flags::ReadWrite | MMU::Flags::Present);
MMU::kernel().identity_map_page(apic->m_local_apic, MMU::Flags::ReadWrite | MMU::Flags::Present);
for (auto& io_apic : apic->m_io_apics)
{
MMU::get().identity_map_page(io_apic.address, MMU::Flags::ReadWrite | MMU::Flags::Present);
MMU::kernel().identity_map_page(io_apic.address, MMU::Flags::ReadWrite | MMU::Flags::Present);
io_apic.max_redirs = io_apic.read(IOAPIC_MAX_REDIRS);
}

2
kernel/kernel/Process.cpp
View File

@@ -130,7 +130,7 @@ namespace Kernel
ASSERT(m_general_allocator == nullptr);
if (m_mmu)
{
MMU::get().load();
MMU::kernel().load();
delete m_mmu;
}
for (auto paddr : m_allocated_pages)

12
kernel/kernel/Scheduler.cpp
View File

@@ -52,16 +52,24 @@ namespace Kernel
return m_current_thread ? *m_current_thread->thread : *m_idle_thread;
}
pid_t Scheduler::current_tid()
{
if (s_instance == nullptr)
return 0;
return Scheduler::get().current_thread().tid();
}
void Scheduler::reschedule()
{
VERIFY_CLI();
ASSERT(InterruptController::get().is_in_service(PIT_IRQ));
InterruptController::get().eoi(PIT_IRQ);
if (PIT::ms_since_boot() <= m_last_reschedule)
return;
m_last_reschedule = PIT::ms_since_boot();
wake_threads();
if (save_current_thread())
@@ -174,7 +182,7 @@ namespace Kernel
GDT::set_tss_stack(current.interrupt_stack_base() + current.interrupt_stack_size());
}
else
MMU::get().load();
MMU::kernel().load();
switch (current.state())
{

8
kernel/kernel/SpinLock.cpp
View File

@@ -1,5 +1,5 @@
#include <kernel/Scheduler.h>
#include <kernel/SpinLock.h>
#include <kernel/Thread.h>
namespace Kernel
{
@@ -25,7 +25,7 @@ namespace Kernel
void RecursiveSpinLock::lock()
{
// FIXME: is this thread safe?
if (m_locker == Thread::current().tid())
if (m_locker == Scheduler::current_tid())
{
m_lock_depth++;
}
@@ -33,13 +33,15 @@ namespace Kernel
{
m_lock.lock();
ASSERT(m_locker == 0);
m_locker = Thread::current().tid();
m_locker = Scheduler::current_tid();
m_lock_depth = 1;
}
}
void RecursiveSpinLock::unlock()
{
ASSERT(m_lock_depth > 0);
m_lock_depth--;
if (m_lock_depth == 0)
{

4
kernel/kernel/Terminal/VesaTerminalDriver.cpp
View File

@@ -36,7 +36,7 @@ VesaTerminalDriver* VesaTerminalDriver::create()
return nullptr;
}
MMU::get().identity_map_range(framebuffer.addr, framebuffer.pitch * framebuffer.height, MMU::Flags::UserSupervisor | MMU::Flags::ReadWrite | MMU::Flags::Present);
MMU::kernel().identity_map_range(framebuffer.addr, framebuffer.pitch * framebuffer.height, MMU::Flags::UserSupervisor | MMU::Flags::ReadWrite | MMU::Flags::Present);
auto* driver = new VesaTerminalDriver(
framebuffer.width,
@@ -53,7 +53,7 @@ VesaTerminalDriver* VesaTerminalDriver::create()
VesaTerminalDriver::~VesaTerminalDriver()
{
MMU::get().unmap_range(m_address, m_pitch * m_height);
MMU::kernel().unmap_range(m_address, m_pitch * m_height);
}
void VesaTerminalDriver::set_pixel(uint32_t offset, Color color)