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/** @file
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/** @file
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 */
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 */
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#include <arch/mm/page.h>
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#include <arch/mm/page.h>
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#include <genarch/mm/page_pt.h>
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#include <genarch/mm/page_pt.h>
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#include <genarch/drivers/ega/ega.h>
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#include <genarch/drivers/legacy/ia32/io.h>
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#include <arch/mm/frame.h>
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#include <arch/mm/frame.h>
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#include <mm/frame.h>
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#include <mm/frame.h>
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#include <mm/page.h>
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#include <mm/page.h>
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#include <mm/as.h>
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#include <mm/as.h>
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#include <arch/types.h>
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#include <arch/types.h>
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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <debug.h>
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#include <debug.h>
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#include <memstr.h>
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#include <memstr.h>
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#include <print.h>
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#include <print.h>
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#include <interrupt.h>
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#include <interrupt.h>
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#include <ddi/ddi.h>
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/** Physical memory area for devices. */
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static parea_t dev_area;
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static parea_t ega_area;
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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 flags;
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    int flags;
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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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         * PA2KA(identity) mapping for all frames until last_frame.
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         * PA2KA(identity) mapping for all frames until last_frame.
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            flags = PAGE_CACHEABLE | PAGE_WRITE;
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            flags = PAGE_CACHEABLE | PAGE_WRITE;
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            if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
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            if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
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                flags |= PAGE_GLOBAL;
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                flags |= PAGE_GLOBAL;
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            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
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            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, 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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    } 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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    paging_on();
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    paging_on();
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}
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}
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uintptr_t hw_map(uintptr_t physaddr, size_t size)
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uintptr_t hw_map(uintptr_t physaddr, size_t size)
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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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}
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void hw_area(void)
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{
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    dev_area.pbase = end_frame;
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    dev_area.frames = SIZE2FRAMES(0xffffffff - end_frame);
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    ddi_parea_register(&dev_area);
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    ega_area.pbase = EGA_VIDEORAM;
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    ega_area.frames = SIZE2FRAMES(EGA_VRAM_SIZE);
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    ddi_parea_register(&ega_area);
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}
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void page_fault(int n __attribute__((unused)), istate_t *istate)
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void page_fault(int n __attribute__((unused)), istate_t *istate)
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{
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{
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    uintptr_t page;
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    uintptr_t page;
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    pf_access_t access;
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    pf_access_t access;
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