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#include <mm/page.h>
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#include <mm/page.h>
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#include <mm/frame.h>
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#include <mm/frame.h>
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#include <cpu.h>
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#include <cpu.h>
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#include <arch/i8259.h>
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#include <arch/i8259.h>
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#include <arch/asm.h>
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#include <arch/asm.h>
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#include <arch/bios/bios.h>
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#include <arch/acpi/madt.h>
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#include <arch/acpi/madt.h>
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/*
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/*
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 * Multi-Processor Specification detection code.
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 * Multi-Processor Specification detection code.
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 */
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 */
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    __address addr, frame;
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    __address addr, frame;
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    int cnt, n;
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    int cnt, n;
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    /*
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    /*
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     * First place to search the MP Floating Pointer Structure is the Extended
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     * BIOS Data Area. We have to read EBDA segment address from the BIOS Data
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     * Area. Unfortunatelly, this memory is in page 0, which has intentionally no
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     * mapping.
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     */
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    frame = frame_alloc(FRAME_KA);
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    map_page_to_frame(frame,0,PAGE_CACHEABLE,0);
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    addr = *((__u16 *) (frame + 0x40e)) * 16;
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    map_page_to_frame(frame,frame,PAGE_CACHEABLE,0);
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    frame_free(frame); 
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    /*
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     * EBDA can be undefined. In that case addr would be 0.
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     * EBDA can be undefined. In that case addr would be 0.
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     */
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     */
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    addr = ebda;
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    if (addr >= 0x1000) {
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    if (addr) {
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        cnt = 1024;
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        cnt = 1024;
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        while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) {
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        while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) {
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            if (mp_fs_check((__u8 *) addr))
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            if (mp_fs_check((__u8 *) addr))
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                goto fs_found;
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                goto fs_found;
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            addr++;
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            addr++;
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            cnt--;
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            cnt--;
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        }
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        }
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    }
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    }
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    else {
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    /*
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        /*
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     * Second place where the MP Floating Pointer Structure may live is the last
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         * Second place where the MP Floating Pointer Structure may live is the last
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     * kilobyte of base memory.
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         * kilobyte of base memory.
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     */
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         */
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    addr = 639*1024;
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        addr = 639*1024;
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    cnt = 1024;
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        cnt = 1024;
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    while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) {
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        while (addr = __u32_search(addr,cnt,FS_SIGNATURE)) {
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        if (mp_fs_check((__u8 *) addr))
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            if (mp_fs_check((__u8 *) addr))
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            goto fs_found;
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                goto fs_found;
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        addr++;
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            addr++;
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        cnt--;
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            cnt--;
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        }
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    }
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    }
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    /*
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    /*
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     * As the last resort, MP Floating Pointer Structure is searched in the BIOS
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     * As the last resort, MP Floating Pointer Structure is searched in the BIOS
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     * ROM.
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     * ROM.