From 94fc751d8af74ed7ebb8da9537ab685c9a6d0b95 Mon Sep 17 00:00:00 2001 From: Paul Kocialkowski Date: Wed, 15 Jul 2015 16:02:25 +0200 Subject: 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 --- arch/arm/cpu/armv7/omap4/boot.c | 60 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 arch/arm/cpu/armv7/omap4/boot.c (limited to 'arch/arm/cpu/armv7/omap4/boot.c') diff --git a/arch/arm/cpu/armv7/omap4/boot.c b/arch/arm/cpu/armv7/omap4/boot.c new file mode 100644 index 0000000..4b5aa77 --- /dev/null +++ b/arch/arm/cpu/armv7/omap4/boot.c @@ -0,0 +1,60 @@ +/* + * OMAP4 boot + * + * Copyright (C) 2015 Paul Kocialkowski + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include + +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]; +} -- cgit v1.1