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#include 

#include 

#include 

#include 

#include "i915_drv.h"

#include "intel_drv.h"

#include 

struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags)

{

    struct file *filep;

    int count;

    filep = __builtin_malloc(sizeof(*filep));

    if(unlikely(filep == NULL))

        return ERR_PTR(-ENOMEM);

    count = size / PAGE_SIZE;

    filep->pages = kzalloc(sizeof(struct page *) * count, 0);

    if(unlikely(filep->pages == NULL))

    {

        kfree(filep);

        return ERR_PTR(-ENOMEM);

    };

    filep->count     = count;

    filep->allocated = 0;

    filep->vma       = NULL;

//    printf("%s file %p pages %p count %d\n",

//              __FUNCTION__,filep, filep->pages, count);

    return filep;

}

struct page *shmem_read_mapping_page_gfp(struct file *filep,

                                         pgoff_t index, gfp_t gfp)

{

    struct page *page;

    if(unlikely(index >= filep->count))

        return ERR_PTR(-EINVAL);

    page = filep->pages[index];

    if(unlikely(page == NULL))

    {

        page = (struct page *)AllocPage();

        if(unlikely(page == NULL))

            return ERR_PTR(-ENOMEM);

        filep->pages[index] = page;

//        printf("file %p index %d page %x\n", filep, index, page);

//        delay(1);

    };

    return page;

};

unsigned long vm_mmap(struct file *file, unsigned long addr,

         unsigned long len, unsigned long prot,

         unsigned long flag, unsigned long offset)

{

    char *mem, *ptr;

    int i;

    if (unlikely(offset + PAGE_ALIGN(len) < offset))

        return -EINVAL;

    if (unlikely(offset & ~PAGE_MASK))

        return -EINVAL;

    mem = UserAlloc(len);

    if(unlikely(mem == NULL))

        return -ENOMEM;

    for(i = offset, ptr = mem; i < offset+len; i+= 4096, ptr+= 4096)

    {

        struct page *page;

        page = shmem_read_mapping_page_gfp(file, i/PAGE_SIZE,0);

        if (unlikely(IS_ERR(page)))

            goto err;

        MapPage(ptr, (addr_t)page, PG_SHARED|PG_UW);

    }

    return (unsigned long)mem;

err:

    UserFree(mem);

    return -ENOMEM;

};

void shmem_file_delete(struct file *filep)

{

//    printf("%s file %p pages %p count %d\n",

//            __FUNCTION__, filep, filep->pages, filep->count);

    if(filep->pages)

        kfree(filep->pages);

}

static void *check_bytes8(const u8 *start, u8 value, unsigned int bytes)

{

        while (bytes) {

                if (*start != value)

                        return (void *)start;

                start++;

                bytes--;

        }

        return NULL;

}

/**

 * memchr_inv - Find an unmatching character in an area of memory.

 * @start: The memory area

 * @c: Find a character other than c

 * @bytes: The size of the area.

 *

 * returns the address of the first character other than @c, or %NULL

 * if the whole buffer contains just @c.

 */

void *memchr_inv(const void *start, int c, size_t bytes)

{

        u8 value = c;

        u64 value64;

        unsigned int words, prefix;

        if (bytes <= 16)

                return check_bytes8(start, value, bytes);

        value64 = value;

#if defined(ARCH_HAS_FAST_MULTIPLIER) && BITS_PER_LONG == 64

        value64 *= 0x0101010101010101;

#elif defined(ARCH_HAS_FAST_MULTIPLIER)

        value64 *= 0x01010101;

        value64 |= value64 << 32;

#else

        value64 |= value64 << 8;

        value64 |= value64 << 16;

        value64 |= value64 << 32;

#endif

        prefix = (unsigned long)start % 8;

        if (prefix) {

                u8 *r;

                prefix = 8 - prefix;

                r = check_bytes8(start, value, prefix);

                if (r)

                        return r;

                start += prefix;

                bytes -= prefix;

        }

        words = bytes / 8;

        while (words) {

                if (*(u64 *)start != value64)

                        return check_bytes8(start, value, 8);

                start += 8;

                words--;

        }

        return check_bytes8(start, value, bytes % 8);

}

int dma_map_sg(struct device *dev, struct scatterlist *sglist,

                           int nelems, int dir)

{

    struct scatterlist *s;

    int i;

    for_each_sg(sglist, s, nelems, i) {

        s->dma_address = (dma_addr_t)sg_phys(s);

#ifdef CONFIG_NEED_SG_DMA_LENGTH

        s->dma_length  = s->length;

#endif

    }

    return nelems;

}

#define _U  0x01    /* upper */

#define _L  0x02    /* lower */

#define _D  0x04    /* digit */

#define _C  0x08    /* cntrl */

#define _P  0x10    /* punct */

#define _S  0x20    /* white space (space/lf/tab) */

#define _X  0x40    /* hex digit */

#define _SP 0x80    /* hard space (0x20) */

extern const unsigned char _ctype[];

#define __ismask(x) (_ctype[(int)(unsigned char)(x)])

#define isalnum(c)  ((__ismask(c)&(_U|_L|_D)) != 0)

#define isalpha(c)  ((__ismask(c)&(_U|_L)) != 0)

#define iscntrl(c)  ((__ismask(c)&(_C)) != 0)

#define isdigit(c)  ((__ismask(c)&(_D)) != 0)

#define isgraph(c)  ((__ismask(c)&(_P|_U|_L|_D)) != 0)

#define islower(c)  ((__ismask(c)&(_L)) != 0)

#define isprint(c)  ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)

#define ispunct(c)  ((__ismask(c)&(_P)) != 0)

/* Note: isspace() must return false for %NUL-terminator */

#define isspace(c)  ((__ismask(c)&(_S)) != 0)

#define isupper(c)  ((__ismask(c)&(_U)) != 0)

#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)

#define isascii(c) (((unsigned char)(c))<=0x7f)

#define toascii(c) (((unsigned char)(c))&0x7f)

static inline unsigned char __tolower(unsigned char c)

{

    if (isupper(c))

        c -= 'A'-'a';

    return c;

}

static inline unsigned char __toupper(unsigned char c)

{

    if (islower(c))

        c -= 'a'-'A';

    return c;

}

#define tolower(c) __tolower(c)

#define toupper(c) __toupper(c)

/*

 * Fast implementation of tolower() for internal usage. Do not use in your

 * code.

 */

static inline char _tolower(const char c)

{

    return c | 0x20;

}

//const char hex_asc[] = "0123456789abcdef";

/**

 * hex_to_bin - convert a hex digit to its real value

 * @ch: ascii character represents hex digit

 *

 * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad

 * input.

 */

int hex_to_bin(char ch)

{

    if ((ch >= '0') && (ch <= '9'))

        return ch - '0';

    ch = tolower(ch);

    if ((ch >= 'a') && (ch <= 'f'))

        return ch - 'a' + 10;

    return -1;

}

EXPORT_SYMBOL(hex_to_bin);

/**

 * hex2bin - convert an ascii hexadecimal string to its binary representation

 * @dst: binary result

 * @src: ascii hexadecimal string

 * @count: result length

 *

 * Return 0 on success, -1 in case of bad input.

 */

int hex2bin(u8 *dst, const char *src, size_t count)

{

    while (count--) {

        int hi = hex_to_bin(*src++);

        int lo = hex_to_bin(*src++);

        if ((hi < 0) || (lo < 0))

            return -1;

        *dst++ = (hi << 4) | lo;

    }

    return 0;

}

EXPORT_SYMBOL(hex2bin);

/**

 * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory

 * @buf: data blob to dump

 * @len: number of bytes in the @buf

 * @rowsize: number of bytes to print per line; must be 16 or 32

 * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)

 * @linebuf: where to put the converted data

 * @linebuflen: total size of @linebuf, including space for terminating NUL

 * @ascii: include ASCII after the hex output

 *

 * hex_dump_to_buffer() works on one "line" of output at a time, i.e.,

 * 16 or 32 bytes of input data converted to hex + ASCII output.

 *

 * Given a buffer of u8 data, hex_dump_to_buffer() converts the input data

 * to a hex + ASCII dump at the supplied memory location.

 * The converted output is always NUL-terminated.

 *

 * E.g.:

 *   hex_dump_to_buffer(frame->data, frame->len, 16, 1,

 *          linebuf, sizeof(linebuf), true);

 *

 * example output buffer:

 * 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f  @ABCDEFGHIJKLMNO

 */

void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,

            int groupsize, char *linebuf, size_t linebuflen,

            bool ascii)

{

    const u8 *ptr = buf;

    u8 ch;

    int j, lx = 0;

    int ascii_column;

    if (rowsize != 16 && rowsize != 32)

        rowsize = 16;

    if (!len)

        goto nil;

    if (len > rowsize)      /* limit to one line at a time */

        len = rowsize;

    if ((len % groupsize) != 0) /* no mixed size output */

        groupsize = 1;

    switch (groupsize) {

    case 8: {

        const u64 *ptr8 = buf;

        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)

            lx += scnprintf(linebuf + lx, linebuflen - lx,

                    "%s%16.16llx", j ? " " : "",

                    (unsigned long long)*(ptr8 + j));

        ascii_column = 17 * ngroups + 2;

        break;

    }

    case 4: {

        const u32 *ptr4 = buf;

        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)

            lx += scnprintf(linebuf + lx, linebuflen - lx,

                    "%s%8.8x", j ? " " : "", *(ptr4 + j));

        ascii_column = 9 * ngroups + 2;

        break;

    }

    case 2: {

        const u16 *ptr2 = buf;

        int ngroups = len / groupsize;

        for (j = 0; j < ngroups; j++)

            lx += scnprintf(linebuf + lx, linebuflen - lx,

                    "%s%4.4x", j ? " " : "", *(ptr2 + j));

        ascii_column = 5 * ngroups + 2;

        break;

    }

    default:

        for (j = 0; (j < len) && (lx + 3) <= linebuflen; j++) {

            ch = ptr[j];

            linebuf[lx++] = hex_asc_hi(ch);

            linebuf[lx++] = hex_asc_lo(ch);

            linebuf[lx++] = ' ';

        }

        if (j)

            lx--;

        ascii_column = 3 * rowsize + 2;

        break;

    }

    if (!ascii)

        goto nil;

    while (lx < (linebuflen - 1) && lx < (ascii_column - 1))

        linebuf[lx++] = ' ';

    for (j = 0; (j < len) && (lx + 2) < linebuflen; j++) {

        ch = ptr[j];

        linebuf[lx++] = (isascii(ch) && isprint(ch)) ? ch : '.';

    }

nil:

    linebuf[lx++] = '\0';

}

/**

 * print_hex_dump - print a text hex dump to syslog for a binary blob of data

 * @level: kernel log level (e.g. KERN_DEBUG)

 * @prefix_str: string to prefix each line with;

 *  caller supplies trailing spaces for alignment if desired

 * @prefix_type: controls whether prefix of an offset, address, or none

 *  is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)

 * @rowsize: number of bytes to print per line; must be 16 or 32

 * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)

 * @buf: data blob to dump

 * @len: number of bytes in the @buf

 * @ascii: include ASCII after the hex output

 *

 * Given a buffer of u8 data, print_hex_dump() prints a hex + ASCII dump

 * to the kernel log at the specified kernel log level, with an optional

 * leading prefix.

 *

 * print_hex_dump() works on one "line" of output at a time, i.e.,

 * 16 or 32 bytes of input data converted to hex + ASCII output.

 * print_hex_dump() iterates over the entire input @buf, breaking it into

 * "line size" chunks to format and print.

 *

 * E.g.:

 *   print_hex_dump(KERN_DEBUG, "raw data: ", DUMP_PREFIX_ADDRESS,

 *          16, 1, frame->data, frame->len, true);

 *

 * Example output using %DUMP_PREFIX_OFFSET and 1-byte mode:

 * 0009ab42: 40 41 42 43 44 45 46 47 48 49 4a 4b 4c 4d 4e 4f  @ABCDEFGHIJKLMNO

 * Example output using %DUMP_PREFIX_ADDRESS and 4-byte mode:

 * ffffffff88089af0: 73727170 77767574 7b7a7978 7f7e7d7c  pqrstuvwxyz{|}~.

 */

void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,

            int rowsize, int groupsize,

            const void *buf, size_t len, bool ascii)

{

    const u8 *ptr = buf;

    int i, linelen, remaining = len;

    unsigned char linebuf[32 * 3 + 2 + 32 + 1];

    if (rowsize != 16 && rowsize != 32)

        rowsize = 16;

    for (i = 0; i < len; i += rowsize) {

        linelen = min(remaining, rowsize);

        remaining -= rowsize;

        hex_dump_to_buffer(ptr + i, linelen, rowsize, groupsize,

                   linebuf, sizeof(linebuf), ascii);

        switch (prefix_type) {

        case DUMP_PREFIX_ADDRESS:

            printk("%s%s%p: %s\n",

                   level, prefix_str, ptr + i, linebuf);

            break;

        case DUMP_PREFIX_OFFSET:

            printk("%s%s%.8x: %s\n", level, prefix_str, i, linebuf);

            break;

        default:

            printk("%s%s%s\n", level, prefix_str, linebuf);

            break;

        }

    }

}

void print_hex_dump_bytes(const char *prefix_str, int prefix_type,

                          const void *buf, size_t len)

{

    print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, 16, 1,

                       buf, len, true);

}

void *kmemdup(const void *src, size_t len, gfp_t gfp)

{

    void *p;

    p = kmalloc(len, gfp);

    if (p)

        memcpy(p, src, len);

    return p;

}

#define KMAP_MAX    256

static struct mutex kmap_mutex;

static struct page* kmap_table[KMAP_MAX];

static int kmap_av;

static int kmap_first;

static void* kmap_base;

int kmap_init()

{

    kmap_base = AllocKernelSpace(KMAP_MAX*4096);

    if(kmap_base == NULL)

        return -1;

    kmap_av = KMAP_MAX;

    MutexInit(&kmap_mutex);

    return 0;

};

void *kmap(struct page *page)

{

    void *vaddr = NULL;

    int i;

    do

    {

        MutexLock(&kmap_mutex);

        if(kmap_av != 0)

        {

            for(i = kmap_first; i < KMAP_MAX; i++)

            {

                if(kmap_table[i] == NULL)

                {

                    kmap_av--;

                    kmap_first = i;

                    kmap_table[i] = page;

                    vaddr = kmap_base + (i<<12);

                    MapPage(vaddr,(addr_t)page,3);

                    break;

                };

            };

        };

        MutexUnlock(&kmap_mutex);

    }while(vaddr == NULL);

    return vaddr;

};

void *kmap_atomic(struct page *page) __attribute__ ((alias ("kmap")));

void kunmap(struct page *page)

{

    void *vaddr;

    int   i;

    MutexLock(&kmap_mutex);

    for(i = 0; i < KMAP_MAX; i++)

    {

        if(kmap_table[i] == page)

        {

            kmap_av++;

            if(i < kmap_first)

                kmap_first = i;

            kmap_table[i] = NULL;

            vaddr = kmap_base + (i<<12);

            MapPage(vaddr,0,0);

            break;

        };

    };

    MutexUnlock(&kmap_mutex);

};

void kunmap_atomic(void *vaddr)

{

    int i;

    MapPage(vaddr,0,0);

    i = (vaddr - kmap_base) >> 12;

    MutexLock(&kmap_mutex);

    kmap_av++;

    if(i < kmap_first)

        kmap_first = i;

    kmap_table[i] = NULL;

    MutexUnlock(&kmap_mutex);

}

size_t strlcat(char *dest, const char *src, size_t count)

{

        size_t dsize = strlen(dest);

        size_t len = strlen(src);

        size_t res = dsize + len;

        /* This would be a bug */

        BUG_ON(dsize >= count);

        dest += dsize;

        count -= dsize;

        if (len >= count)

                len = count-1;

        memcpy(dest, src, len);

        dest[len] = 0;

        return res;

}

EXPORT_SYMBOL(strlcat);

void msleep(unsigned int msecs)

{

    msecs /= 10;

    if(!msecs) msecs = 1;

     __asm__ __volatile__ (

     "call *__imp__Delay"

     ::"b" (msecs));

     __asm__ __volatile__ (

     "":::"ebx");

};

/* simple loop based delay: */

static void delay_loop(unsigned long loops)

{

        asm volatile(

                "       test %0,%0      \n"

                "       jz 3f           \n"

                "       jmp 1f          \n"

                ".align 16              \n"

                "1:     jmp 2f          \n"

                ".align 16              \n"

                "2:     dec %0          \n"

                "       jnz 2b          \n"

                "3:     dec %0          \n"

                : /* we don't need output */

                :"a" (loops)

        );

}

static void (*delay_fn)(unsigned long) = delay_loop;

void __delay(unsigned long loops)

{

        delay_fn(loops);

}

inline void __const_udelay(unsigned long xloops)

{

        int d0;

        xloops *= 4;

        asm("mull %%edx"

                : "=d" (xloops), "=&a" (d0)

                : "1" (xloops), ""

                (loops_per_jiffy * (HZ/4)));

        __delay(++xloops);

}

void __udelay(unsigned long usecs)

{

        __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */

}

unsigned int _sw_hweight32(unsigned int w)

{

#ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER

        w -= (w >> 1) & 0x55555555;

        w =  (w & 0x33333333) + ((w >> 2) & 0x33333333);

        w =  (w + (w >> 4)) & 0x0f0f0f0f;

        return (w * 0x01010101) >> 24;

#else

        unsigned int res = w - ((w >> 1) & 0x55555555);

        res = (res & 0x33333333) + ((res >> 2) & 0x33333333);

        res = (res + (res >> 4)) & 0x0F0F0F0F;

        res = res + (res >> 8);

        return (res + (res >> 16)) & 0x000000FF;

#endif

}

EXPORT_SYMBOL(_sw_hweight32);

void usleep_range(unsigned long min, unsigned long max)

{

    udelay(max);

}

EXPORT_SYMBOL(usleep_range);

static unsigned long round_jiffies_common(unsigned long j, int cpu,

                bool force_up)

{

        int rem;

        unsigned long original = j;

        /*

         * We don't want all cpus firing their timers at once hitting the

         * same lock or cachelines, so we skew each extra cpu with an extra

         * 3 jiffies. This 3 jiffies came originally from the mm/ code which

         * already did this.

         * The skew is done by adding 3*cpunr, then round, then subtract this

         * extra offset again.

         */

        j += cpu * 3;

        rem = j % HZ;

        /*

         * If the target jiffie is just after a whole second (which can happen

         * due to delays of the timer irq, long irq off times etc etc) then

         * we should round down to the whole second, not up. Use 1/4th second

         * as cutoff for this rounding as an extreme upper bound for this.

         * But never round down if @force_up is set.

         */

        if (rem < HZ/4 && !force_up) /* round down */

                j = j - rem;

        else /* round up */

                j = j - rem + HZ;

        /* now that we have rounded, subtract the extra skew again */

        j -= cpu * 3;

        /*

         * Make sure j is still in the future. Otherwise return the

         * unmodified value.

         */

        return time_is_after_jiffies(j) ? j : original;

}

unsigned long round_jiffies_up_relative(unsigned long j, int cpu)

{

        unsigned long j0 = jiffies;

        /* Use j0 because jiffies might change while we run */

        return round_jiffies_common(j + j0, 0, true) - j0;

}

EXPORT_SYMBOL_GPL(__round_jiffies_up_relative);

#include 

struct rcu_ctrlblk {

        struct rcu_head *rcucblist;     /* List of pending callbacks (CBs). */

        struct rcu_head **donetail;     /* ->next pointer of last "done" CB. */

        struct rcu_head **curtail;      /* ->next pointer of last CB. */

//        RCU_TRACE(long qlen);           /* Number of pending CBs. */

//        RCU_TRACE(unsigned long gp_start); /* Start time for stalls. */

//        RCU_TRACE(unsigned long ticks_this_gp); /* Statistic for stalls. */

//        RCU_TRACE(unsigned long jiffies_stall); /* Jiffies at next stall. */

//        RCU_TRACE(const char *name);    /* Name of RCU type. */

};

/* Definition for rcupdate control block. */

static struct rcu_ctrlblk rcu_sched_ctrlblk = {

        .donetail       = &rcu_sched_ctrlblk.rcucblist,

        .curtail        = &rcu_sched_ctrlblk.rcucblist,

//        RCU_TRACE(.name = "rcu_sched")

};

static void __call_rcu(struct rcu_head *head,

                       void (*func)(struct rcu_head *rcu),

                       struct rcu_ctrlblk *rcp)

{

        unsigned long flags;

//        debug_rcu_head_queue(head);

        head->func = func;

        head->next = NULL;

        local_irq_save(flags);

        *rcp->curtail = head;

        rcp->curtail = &head->next;

//        RCU_TRACE(rcp->qlen++);

        local_irq_restore(flags);

}

/*

 * Post an RCU callback to be invoked after the end of an RCU-sched grace

 * period.  But since we have but one CPU, that would be after any

 * quiescent state.

 */

void call_rcu_sched(struct rcu_head *head, void (*func)(struct rcu_head *rcu))

{

        __call_rcu(head, func, &rcu_sched_ctrlblk);

}