mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
d8328f3b85
After commit dc548fbbd2 ("ARM: omap: convert
sched_clock() to use new infrastructure"), OMAPs that use the 32KiHz
"synchronization timer" as their clocksource crash during boot:
[ 0.000000] OMAP clockevent source: GPTIMER1 at 32768 Hz
[ 0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 0.000000] pgd = c0004000
[ 0.000000] [00000000] *pgd=00000000
[ 0.000000] Internal error: Oops: 80000005 [#1] SMP
[ 0.000000] last sysfs file:
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 Tainted: G W (2.6.37-07734-g2467802 #7)
[ 0.000000] PC is at 0x0
[ 0.000000] LR is at sched_clock_poll+0x2c/0x3c
[ 0.000000] pc : [<00000000>] lr : [<c0060b74>] psr: 600001d3
[ 0.000000] sp : c058bfd0 ip : c058a000 fp : 00000000
[ 0.000000] r10: 00000000 r9 : 411fc092 r8 : 800330c8
[ 0.000000] r7 : c05a08e0 r6 : c0034c48 r5 : c05ffc40 r4 : c0034c4c
[ 0.000000] r3 : c05ffe6c r2 : c05a0bc0 r1 : c059f098 r0 : 00000000
[ 0.000000] Flags: nZCv IRQs off FIQs off Mode SVC_32 ISA ARM Segment kernel
[ 0.000000] Control: 10c53c7f Table: 8000404a DAC: 00000017
This is due to the recent ARM init_sched_clock() changes and the late
initialization of the counter_32k clock source. More information here:
http://marc.info/?l=linux-omap&m=129513468605208&w=2
Fix by initializing the counter_32k clocksource during the machine timer
initialization.
Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Thomas Weber <weber@corscience.de>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*
|
|
* arch/arm/plat-omap/include/mach/common.h
|
|
*
|
|
* Header for code common to all OMAP machines.
|
|
*
|
|
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
|
|
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* 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.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#ifndef __ARCH_ARM_MACH_OMAP_COMMON_H
|
|
#define __ARCH_ARM_MACH_OMAP_COMMON_H
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <plat/i2c.h>
|
|
|
|
struct sys_timer;
|
|
|
|
extern void omap_map_common_io(void);
|
|
extern struct sys_timer omap_timer;
|
|
extern int __init omap_init_clocksource_32k(void);
|
|
|
|
extern void omap_reserve(void);
|
|
|
|
/*
|
|
* IO bases for various OMAP processors
|
|
* Except the tap base, rest all the io bases
|
|
* listed are physical addresses.
|
|
*/
|
|
struct omap_globals {
|
|
u32 class; /* OMAP class to detect */
|
|
void __iomem *tap; /* Control module ID code */
|
|
unsigned long sdrc; /* SDRAM Controller */
|
|
unsigned long sms; /* SDRAM Memory Scheduler */
|
|
unsigned long ctrl; /* System Control Module */
|
|
unsigned long ctrl_pad; /* PAD Control Module */
|
|
unsigned long prm; /* Power and Reset Management */
|
|
unsigned long cm; /* Clock Management */
|
|
unsigned long cm2;
|
|
unsigned long uart1_phys;
|
|
unsigned long uart2_phys;
|
|
unsigned long uart3_phys;
|
|
unsigned long uart4_phys;
|
|
};
|
|
|
|
void omap2_set_globals_242x(void);
|
|
void omap2_set_globals_243x(void);
|
|
void omap2_set_globals_3xxx(void);
|
|
void omap2_set_globals_443x(void);
|
|
|
|
/* These get called from omap2_set_globals_xxxx(), do not call these */
|
|
void omap2_set_globals_tap(struct omap_globals *);
|
|
void omap2_set_globals_sdrc(struct omap_globals *);
|
|
void omap2_set_globals_control(struct omap_globals *);
|
|
void omap2_set_globals_prcm(struct omap_globals *);
|
|
|
|
void omap3_map_io(void);
|
|
|
|
/**
|
|
* omap_test_timeout - busy-loop, testing a condition
|
|
* @cond: condition to test until it evaluates to true
|
|
* @timeout: maximum number of microseconds in the timeout
|
|
* @index: loop index (integer)
|
|
*
|
|
* Loop waiting for @cond to become true or until at least @timeout
|
|
* microseconds have passed. To use, define some integer @index in the
|
|
* calling code. After running, if @index == @timeout, then the loop has
|
|
* timed out.
|
|
*/
|
|
#define omap_test_timeout(cond, timeout, index) \
|
|
({ \
|
|
for (index = 0; index < timeout; index++) { \
|
|
if (cond) \
|
|
break; \
|
|
udelay(1); \
|
|
} \
|
|
})
|
|
|
|
extern struct device *omap2_get_mpuss_device(void);
|
|
extern struct device *omap2_get_iva_device(void);
|
|
extern struct device *omap2_get_l3_device(void);
|
|
extern struct device *omap4_get_dsp_device(void);
|
|
|
|
#endif /* __ARCH_ARM_MACH_OMAP_COMMON_H */
|