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/* Simple frame buffer test. Draws some horizontal with different colors. */

#include "support.h"

#define BUFADDR   0x40100000

#define BASEADDR  0xb8000000

#define BUF_PTR  ((unsigned char *)BUFADDR)

#define PAL_PTR  ((unsigned long *)(BASEADDR + 0x400))

#define SIZEX     640

#define SIZEY     480

#define putxy(x,y) *(BUF_PTR + (x) + (y) * SIZEX)

#define setpal(i,r,g,b) *(PAL_PTR + (i)) = (((unsigned long)(r) & 0xff) << 16) | (((unsigned long)(g) & 0xff) << 8) | (((unsigned long)(b) & 0xff) << 0)

void hline (int y, int x1, int x2, unsigned char c)

{

  int x;

  for (x = x1; x < x2; x++)

    putxy(x, y) = c;

}

int main(void)

{

  unsigned i;

  /* Set address of buffer at predefined location */

  *((unsigned long *)(BASEADDR) + 0x1) = BUFADDR;

  for (i = 0; i < 256; i++)

    setpal (i, 256 - i, i, 128 ^ i);

  /* Turn display on */

  *((unsigned long *)(BASEADDR) + 0x0) = 0xffffffff;

  for (i = 0; i < 256; i++) {

    hline (i, 0, i, i);

    hline (256 - i, 256 - i, 256 + i, i);

  }

  report (0xdeaddead);

  return 0;

}