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void page_arch_init(void)
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void page_arch_init(void)
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{
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{
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    uintptr_t cur;
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    uintptr_t cur;
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    int i;
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    int i;
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    int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL;
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    int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL | PAGE_WRITE;
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    if (config.cpu_active == 1) {
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    if (config.cpu_active == 1) {
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        page_mapping_operations = &pt_mapping_operations;
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        page_mapping_operations = &pt_mapping_operations;
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        /*
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        /*
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                page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);
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                page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags);
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        }
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        }
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        exc_register(14, "page_fault", (iroutine) page_fault);
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        exc_register(14, "page_fault", (iroutine) page_fault);
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        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
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        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
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    }
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    else {
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    } else
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        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
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        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
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    }
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}
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}
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/** Identity page mapper
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/** Identity page mapper
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 *
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 *
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        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
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        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
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    uintptr_t virtaddr = PA2KA(last_frame);
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    uintptr_t virtaddr = PA2KA(last_frame);
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    pfn_t i;
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    pfn_t i;
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    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
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    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
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        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
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        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_WRITE);
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    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
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    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
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    return virtaddr;
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    return virtaddr;
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}
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}