u-boot/arch/arm/cpu/armv7/omap4/boot.c
Paul Kocialkowski 94fc751d8a omap4: Definitions for SYS_BOOT-based fallback boot device selection
This introduces code to read the value of the SYS_BOOT pins on the OMAP4, as
well as the memory-preferred scheme for the interpretation of each value.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
2015-07-27 15:02:08 -04:00

60 lines
1.2 KiB
C

/*
* OMAP4 boot
*
* Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/omap_common.h>
#include <spl.h>
static u32 boot_devices[] = {
BOOT_DEVICE_MMC2,
BOOT_DEVICE_XIP,
BOOT_DEVICE_XIPWAIT,
BOOT_DEVICE_NAND,
BOOT_DEVICE_XIPWAIT,
BOOT_DEVICE_MMC1,
BOOT_DEVICE_ONENAND,
BOOT_DEVICE_ONENAND,
BOOT_DEVICE_MMC2,
BOOT_DEVICE_ONENAND,
BOOT_DEVICE_XIPWAIT,
BOOT_DEVICE_NAND,
BOOT_DEVICE_NAND,
BOOT_DEVICE_MMC1,
BOOT_DEVICE_ONENAND,
BOOT_DEVICE_MMC2,
BOOT_DEVICE_XIP,
BOOT_DEVICE_XIPWAIT,
BOOT_DEVICE_NAND,
BOOT_DEVICE_MMC1,
BOOT_DEVICE_MMC1,
BOOT_DEVICE_ONENAND,
BOOT_DEVICE_MMC2,
BOOT_DEVICE_XIP,
BOOT_DEVICE_MMC2_2,
BOOT_DEVICE_NAND,
BOOT_DEVICE_MMC2_2,
BOOT_DEVICE_MMC1,
BOOT_DEVICE_MMC2_2,
BOOT_DEVICE_MMC2_2,
BOOT_DEVICE_NONE,
BOOT_DEVICE_XIPWAIT,
};
u32 omap_sys_boot_device(void)
{
u32 sys_boot;
/* Grab the first 5 bits of the status register for SYS_BOOT. */
sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 5) - 1);
if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
return BOOT_DEVICE_NONE;
return boot_devices[sys_boot];
}