Kernel/aarch64: Add {panic,dbgln}_without_mmu

And use it the code that will be part of the early boot process.

The PANIC macro and dbgln functions cannot be used as it accesses global
variables, which in the early boot process do not work, since the MMU is
not yet enabled.

1 files changed, 8 insertions, 5 deletions

diff --git a/Kernel/Arch/aarch64/MMU.cpp b/Kernel/Arch/aarch64/MMU.cpp
index 4d6ea8ac36..53e00af0be 100644
--- a/Kernel/Arch/aarch64/MMU.cpp
+++ b/Kernel/Arch/aarch64/MMU.cpp
@@ -46,17 +46,17 @@ public:
         , m_current(start)
     {
         if (m_start >= m_end) {
-            PANIC("Invalid memory range passed to PageBumpAllocator");
+            panic_without_mmu("Invalid memory range passed to PageBumpAllocator"sv);
         }
         if ((FlatPtr)m_start % PAGE_TABLE_SIZE != 0 || (FlatPtr)m_end % PAGE_TABLE_SIZE != 0) {
-            PANIC("Memory range passed into PageBumpAllocator not aligned to PAGE_TABLE_SIZE");
+            panic_without_mmu("Memory range passed into PageBumpAllocator not aligned to PAGE_TABLE_SIZE"sv);
         }
     }
 
     u64* take_page()
     {
         if (m_current == m_end) {
-            PANIC("Prekernel pagetable memory exhausted");
+            panic_without_mmu("Prekernel pagetable memory exhausted"sv);
         }
 
         u64* page = m_current;
@@ -221,8 +221,11 @@ static u64* get_page_directory(u64* root_table, VirtualAddress virtual_addr)
 
 static void setup_kernel_page_directory(u64* root_table)
 {
-    boot_pd_kernel = PhysicalAddress((PhysicalPtr)get_page_directory(root_table, VirtualAddress { kernel_mapping_base }));
-    VERIFY(!boot_pd_kernel.is_null());
+    auto kernel_page_directory = (PhysicalPtr)get_page_directory(root_table, VirtualAddress { kernel_mapping_base });
+    if (!kernel_page_directory)
+        panic_without_mmu("Could not find kernel page directory!"sv);
+
+    boot_pd_kernel = PhysicalAddress(kernel_page_directory);
 }
 
 void init_page_tables()