u-boot/arch/blackfin/cpu/initcode.h
Mike Frysinger 4150cec335 Blackfin: split out async setup
We really only need to tweak the async banks in the initcode if the
processor is booting out of it, otherwise we can wait until later
on in the CPU booting setup.

This also makes testing in the sim and early bring up over JTAG work
much smoother when the initcode gets bypassed.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-07-12 02:17:46 -04:00

71 lines
1.7 KiB
C

/*
* Code for early processor initialization
*
* Copyright (c) 2004-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef __BFIN_INITCODE_H__
#define __BFIN_INITCODE_H__
#include <asm/mach-common/bits/bootrom.h>
#ifndef BFIN_IN_INITCODE
# define serial_putc(c)
#endif
#ifndef CONFIG_EBIU_RSTCTL_VAL
# define CONFIG_EBIU_RSTCTL_VAL 0 /* only MDDRENABLE is useful */
#endif
#if ((CONFIG_EBIU_RSTCTL_VAL & 0xFFFFFFC4) != 0)
# error invalid EBIU_RSTCTL value: must not set reserved bits
#endif
#ifndef CONFIG_EBIU_MBSCTL_VAL
# define CONFIG_EBIU_MBSCTL_VAL 0
#endif
#if defined(CONFIG_EBIU_DDRQUE_VAL) && ((CONFIG_EBIU_DDRQUE_VAL & 0xFFFF8000) != 0)
# error invalid EBIU_DDRQUE value: must not set reserved bits
#endif
__attribute__((always_inline)) static inline void
program_async_controller(ADI_BOOT_DATA *bs)
{
#ifdef BFIN_IN_INITCODE
/*
* We really only need to setup the async banks early if we're
* booting out of it. Otherwise, do it later on in cpu_init.
*/
if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS &&
CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_PARA)
return;
#endif
serial_putc('a');
/* Program the async banks controller. */
bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
serial_putc('b');
/* Not all parts have these additional MMRs. */
#ifdef EBIU_MBSCTL
bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
#endif
#ifdef EBIU_MODE
# ifdef CONFIG_EBIU_MODE_VAL
bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
# endif
# ifdef CONFIG_EBIU_FCTL_VAL
bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
# endif
#endif
serial_putc('c');
}
#endif