uboot下init_sequence_f函数之reserve_video

reserve_video:

#ifdef CONFIG_DM_VIDEO
static int reserve_video(void)
{
ulong addr;
int ret;
addr = gd->relocaddr;
ret = video_reserve(&addr);
if (ret)
return ret;
gd->relocaddr = addr;
return 0;
}
#else
# ifdef CONFIG_LCD
static int reserve_lcd(void)
{
#  ifdef CONFIG_FB_ADDR
gd->fb_base = CONFIG_FB_ADDR;
#  else
/* reserve memory for LCD display (always full pages) */
gd->relocaddr = lcd_setmem(gd->relocaddr);
gd->fb_base = gd->relocaddr;
#  endif /* CONFIG_FB_ADDR */
return 0;
}
# endif /* CONFIG_LCD */
# if defined(CONFIG_VIDEO) && (!defined(CONFIG_PPC) || defined(CONFIG_8xx)) && \
!defined(CONFIG_ARM) && !defined(CONFIG_X86) && \
!defined(CONFIG_BLACKFIN) && !defined(CONFIG_M68K)
static int reserve_legacy_video(void)
{
/* reserve memory for video display (always full pages) */
gd->relocaddr = video_setmem(gd->relocaddr);
gd->fb_base = gd->relocaddr;
return 0;
}
# endif
#endif /* !CONFIG_DM_VIDEO */