mirror of
https://github.com/brain-hackers/u-boot-brain
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4c52783b3d
1. Add 7447A and 7448 processor support. 2. Add the following flags. CFG_CONFIG_BUS_CLK : If the 74xx bus frequency can be configured dynamically (such as by switch on board), this flag should be set. CFG_EXCEPTION_AFTER_RELOCATE: If an exception occurs after the u-boot relocates to RAM, this flag should be set. CFG_SERIAL_HANG_IN_EXCEPTION: If the print out function will cause the system hang in exception, this flag should be set. There is a design issue for tsi108/109 pci configure read. When pci scan the slots, if there is no pci card, the tsi108/9 will cause a machine check exception for mpc7448 processor. Signed-off-by: Alexandre Bounine <alexandreb@tundra.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* (C) Copyright 2001
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* Josh Huber <huber@mclx.com>, Mission Critical Linux, 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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/*
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* cpu_init.c - low level cpu init
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*
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* there's really nothing going on here yet. future work area?
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*/
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#include <common.h>
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#include <74xx_7xx.h>
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/*
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* Breath some life into the CPU...
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*
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* there's basically nothing to do here since the memory controller
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* isn't on the CPU in this case.
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*/
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void
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cpu_init_f (void)
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{
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switch (get_cpu_type()) {
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case CPU_7450:
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case CPU_7455:
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case CPU_7457:
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case CPU_7447A:
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case CPU_7448:
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/* enable the timebase bit in HID0 */
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set_hid0(get_hid0() | 0x4000000);
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break;
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default:
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/* do nothing */
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break;
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}
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}
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/*
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* initialize higher level parts of CPU like timers
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*/
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int cpu_init_r (void)
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{
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return (0);
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}
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