mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 00:47:26 +00:00
a08af85f46
Reboot mode is written in scratchpad memory before reboot in the form of a single char, that is the first letter of the reboot mode string as passed to the reboot function. This mechanism is supported on OMAP3 both my the upstream kernel and by various TI kernels. It is up to each board to make use of this mechanism or not. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> Reviewed-by: Tom Rini <trini@konsulko.com>
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/*
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* OMAP3 boot
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*
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* Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/sys_proto.h>
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#include <spl.h>
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static u32 boot_devices[] = {
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_MMC2_2,
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};
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u32 omap_sys_boot_device(void)
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{
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struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
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u32 sys_boot;
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/* Grab the first 5 bits of the status register for SYS_BOOT. */
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sys_boot = readl(&ctrl_base->status) & ((1 << 5) - 1);
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if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
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return BOOT_DEVICE_NONE;
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return boot_devices[sys_boot];
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}
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char omap_reboot_mode(void)
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{
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u32 reboot_mode;
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char c;
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reboot_mode = readl((u32 *)(OMAP34XX_SCRATCHPAD + 4));
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c = (reboot_mode >> 24) & 0xff;
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if (c != 'B')
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return -1;
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c = (reboot_mode >> 16) & 0xff;
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if (c != 'M')
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return -1;
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c = reboot_mode & 0xff;
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return c;
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}
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int omap_reboot_mode_clear(void)
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{
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writel(0, (u32 *)(OMAP34XX_SCRATCHPAD + 4));
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return 0;
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}
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int omap_reboot_mode_store(char c)
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{
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u32 reboot_mode;
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reboot_mode = 'B' << 24 | 'M' << 16 | c;
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writel(reboot_mode, (u32 *)(OMAP34XX_SCRATCHPAD + 4));
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return 0;
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}
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