888
edits
Changes
→KernelLdr_LoadKernel
Next, it initializes the MMU with a basic identity mapping for Kernel + KernelLdr.
Next, it initializes the MMU with a basic identity mapping for Kernel + KernelLdr.
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<pre>
// TODO: Fill this out with pseudocode.
// Set page table region
page_table_region = ini1_end_address;
page_table_region_size = 0x200000;
g_InitialPageAllocator.Initialize(page_table_region);
// Initialize new page table, eventually ends up in TTBR1_EL1.
KInitialPageTable ttbr1_page_table(&g_InitialPageAllocator);
// Setup MMU with initial identity mapping.
KernelLdr_MapInitialIdentityMapping(&ttbr1_page_table, kernel_base, rw_end_offset, page_table_region, page_table_region_size, &g_InitialPageAllocator);
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</pre>
<pre>
<pre>
return final_virtual_kernel_base - original_kernel_base;
return final_virtual_kernel_base - original_kernel_base;
</pre>
== KernelLdr_MapInitialIdentityMapping ==
Signature is like
void KernelLdr_MapInitialIdentityMapping(KInitialPageTable *ttbr1_page_table, uintptr_t kernel_base, uintptr_t kernel_size, uintptr_t page_tables_base, uintptr_t page_tables_size, InitialPageAllocator *allocator);
<pre>
// TODO: Fill this out with pseudocode.
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</pre>