mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-06 21:03:21 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Some SOCs have do not start up with their 'main' CPU. The first U-Boot code may then be executed with a CPU which does not have a CP15, or not a useful one. Here we split the initialization of CP15 into a separate call, which can be performed later if required. Once the main CPU is running, you should call cpu_init_cp15() to perform this init as early as possible. Existing ARMv7 boards which define CONFIG_SKIP_LOWLEVEL_INIT should not need to change, this CP15 init is still skipped in that case. The only impact for these boards is that the cpu_init_cp15() will be available even if it is never used on these boards. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef _U_BOOT_ARM_H_
|
|
#define _U_BOOT_ARM_H_ 1
|
|
|
|
/* for the following variables, see start.S */
|
|
extern ulong _bss_start_ofs; /* BSS start relative to _start */
|
|
extern ulong _bss_end_ofs; /* BSS end relative to _start */
|
|
extern ulong _end_ofs; /* end of image relative to _start */
|
|
extern ulong IRQ_STACK_START; /* top of IRQ stack */
|
|
extern ulong FIQ_STACK_START; /* top of FIQ stack */
|
|
extern ulong _TEXT_BASE; /* code start */
|
|
extern ulong _datarel_start_ofs;
|
|
extern ulong _datarelrolocal_start_ofs;
|
|
extern ulong _datarellocal_start_ofs;
|
|
extern ulong _datarelro_start_ofs;
|
|
extern ulong IRQ_STACK_START_IN; /* 8 bytes in IRQ stack */
|
|
|
|
/* cpu/.../cpu.c */
|
|
int cpu_init(void);
|
|
int cleanup_before_linux(void);
|
|
|
|
/* Set up ARMv7 MMU, caches and TLBs */
|
|
void cpu_init_cp15(void);
|
|
|
|
/* cpu/.../arch/cpu.c */
|
|
int arch_cpu_init(void);
|
|
int arch_misc_init(void);
|
|
|
|
/* board/.../... */
|
|
int board_init(void);
|
|
int dram_init (void);
|
|
void dram_init_banksize (void);
|
|
void setup_serial_tag (struct tag **params);
|
|
void setup_revision_tag (struct tag **params);
|
|
|
|
/* cpu/.../interrupt.c */
|
|
int arch_interrupt_init (void);
|
|
void reset_timer_masked (void);
|
|
ulong get_timer_masked (void);
|
|
void udelay_masked (unsigned long usec);
|
|
|
|
#endif /* _U_BOOT_ARM_H_ */
|