arch/blackfin/include/asm/config-pre.h

/*
 * config-pre.h - common defines for Blackfin boards in config.h
 *
 * Copyright (c) 2007-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef __ASM_BLACKFIN_CONFIG_PRE_H__
#define __ASM_BLACKFIN_CONFIG_PRE_H__

/* Misc helper functions */
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

/* Bootmode defines -- your config needs to select this via CONFIG_BFIN_BOOT_MODE.
 * Depending on your cpu, some of these may not be valid, check your HRM.
 * The actual values here are meaningless as long as they're unique.
 */
#define BFIN_BOOT_BYPASS      1       /* bypass bootrom */
#define BFIN_BOOT_PARA        2       /* boot ldr out of parallel flash */
#define BFIN_BOOT_SPI_MASTER  3       /* boot ldr out of serial flash */
#define BFIN_BOOT_SPI_SLAVE   4       /* boot ldr as spi slave */
#define BFIN_BOOT_TWI_MASTER  5       /* boot ldr over twi device */
#define BFIN_BOOT_TWI_SLAVE   6       /* boot ldr over twi slave */
#define BFIN_BOOT_UART        7       /* boot ldr over uart */
#define BFIN_BOOT_IDLE        8       /* do nothing, just idle */
#define BFIN_BOOT_FIFO        9       /* boot ldr out of FIFO */
#define BFIN_BOOT_MEM         10      /* boot ldr out of memory (warmboot) */
#define BFIN_BOOT_16HOST_DMA  11      /* boot ldr from 16-bit host dma */
#define BFIN_BOOT_8HOST_DMA   12      /* boot ldr from 8-bit host dma */
#define BFIN_BOOT_NAND        13      /* boot ldr from nand flash */

#ifndef __ASSEMBLY__
static inline const char *get_bfin_boot_mode(int bfin_boot)
{
	switch (bfin_boot) {
	case BFIN_BOOT_BYPASS:     return "bypass";
	case BFIN_BOOT_PARA:       return "parallel flash";
	case BFIN_BOOT_SPI_MASTER: return "spi flash";
	case BFIN_BOOT_SPI_SLAVE:  return "spi slave";
	case BFIN_BOOT_TWI_MASTER: return "i2c flash";
	case BFIN_BOOT_TWI_SLAVE:  return "i2c slave";
	case BFIN_BOOT_UART:       return "uart";
	case BFIN_BOOT_IDLE:       return "idle";
	case BFIN_BOOT_FIFO:       return "fifo";
	case BFIN_BOOT_MEM:        return "memory";
	case BFIN_BOOT_16HOST_DMA: return "16bit dma";
	case BFIN_BOOT_8HOST_DMA:  return "8bit dma";
	case BFIN_BOOT_NAND:       return "nand flash";
	default:                   return "INVALID";
	}
}
#endif

/* Most bootroms allow for EVT1 redirection */
#if ((defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__)) \
     && __SILICON_REVISION__ < 3) || defined(__ADSPBF561__)
# undef CONFIG_BFIN_BOOTROM_USES_EVT1
#else
# define CONFIG_BFIN_BOOTROM_USES_EVT1
#endif

/* Define the default SPI CS used when booting out of SPI */
#if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
    defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__) || \
    defined(__ADSPBF51x__)
# define BFIN_BOOT_SPI_SSEL 2
#else
# define BFIN_BOOT_SPI_SSEL 1
#endif

/* Define to get a GPIO CS with the Blackfin SPI controller */
#define MAX_CTRL_CS 8

/* There is no Blackfin/NetBSD port */
#undef CONFIG_BOOTM_NETBSD

/* We rarely use interrupts, so favor throughput over latency */
#define CONFIG_BFIN_INS_LOWOVERHEAD

#endif