Hello,
I'm trying to add support for frame buffer to my au1100 based board but I'm a bit confused where I can allocate the frame buffer memory.
Looking at "lib_mips/board.c" I see:
/* * Now that we have DRAM mapped and working, we can * relocate the code and continue running from DRAM. */ addr = CFG_SDRAM_BASE + gd->ram_size;
/* We can reserve some RAM "on top" here. */
/* round down to next 4 kB limit. */ addr &= ~(4096 - 1); debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
/* Reserve memory for U-Boot code, data & bss * round down to next 16 kB limit */ addr -= len; addr &= ~(16 * 1024 - 1);
debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
Where "len" is:
len = (ulong)&uboot_end - CFG_MONITOR_BASE;
So I think I can redefine "len" as follow:
len = (ulong)&uboot_end - CFG_MONITOR_BASE + LCD_MEMORY_SIZE + PAGE_SIZE;
and then adding the code:
/* configure available FLASH banks */ size = flash_init(); display_flash_config (size);
#ifdef CONFIG_LCD # ifndef PAGE_SIZE # define PAGE_SIZE 4096 # endif /* * reserve memory for LCD display (always full pages) */ /* bss_end is defined in the board-specific linker script */ addr = (uboot_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); size = lcd_setmem (addr); gd->fb_base = addr; #endif /* CONFIG_LCD */
bd = gd->bd; bd->bi_flashstart = CFG_FLASH_BASE; bd->bi_flashsize = size;
to the function board_init_r().
Is that sane?
Ciao,
Rodolfo