mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
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>
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
|
|
* (C) Copyright 2001
|
|
* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* cpu_init.c - low level cpu init
|
|
*
|
|
* there's really nothing going on here yet. future work area?
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <74xx_7xx.h>
|
|
|
|
/*
|
|
* Breath some life into the CPU...
|
|
*
|
|
* there's basically nothing to do here since the memory controller
|
|
* isn't on the CPU in this case.
|
|
*/
|
|
void
|
|
cpu_init_f (void)
|
|
{
|
|
switch (get_cpu_type()) {
|
|
case CPU_7450:
|
|
case CPU_7455:
|
|
case CPU_7457:
|
|
case CPU_7447A:
|
|
case CPU_7448:
|
|
/* enable the timebase bit in HID0 */
|
|
set_hid0(get_hid0() | 0x4000000);
|
|
break;
|
|
default:
|
|
/* do nothing */
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* initialize higher level parts of CPU like timers
|
|
*/
|
|
int cpu_init_r (void)
|
|
{
|
|
return (0);
|
|
}
|