mirror of
https://github.com/brain-hackers/u-boot-brain
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59c651f4e2
The patch provides slcr base address initialization support and a support to reset the cpu through slcr driver, hence removed the reset_cpu() from board.c. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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* Copyright (c) 2013 Xilinx Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <malloc.h>
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#include <asm/arch/hardware.h>
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#define SLCR_LOCK_MAGIC 0x767B
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#define SLCR_UNLOCK_MAGIC 0xDF0D
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static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
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void zynq_slcr_lock(void)
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{
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if (!slcr_lock)
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writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
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}
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void zynq_slcr_unlock(void)
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{
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if (slcr_lock)
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writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
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}
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/* Reset the entire system */
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void zynq_slcr_cpu_reset(void)
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{
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/*
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* Unlock the SLCR then reset the system.
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* Note that this seems to require raw i/o
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* functions or there's a lockup?
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*/
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zynq_slcr_unlock();
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/*
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* Clear 0x0F000000 bits of reboot status register to workaround
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* the FSBL not loading the bitstream after soft-reboot
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* This is a temporary solution until we know more.
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*/
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clrbits_le32(&slcr_base->reboot_status, 0xF000000);
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writel(1, &slcr_base->pss_rst_ctrl);
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}
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