On Sun, 2009-02-22 at 20:25 +0100,
rich_daddio@... wrote:
> Hi All,
> linux-2.6.24 patch for or32 is finally avaiable for use only tested on
> sim as usual:
>
> To get it:
> ftp www.meansoffreedom.com
> user: download
> pw: download
>
> cd mof_orsoc
>
> get linux_2.6.24_or32_unified_simtested.bz2
>
> Shout out to Stefan a friend of ORSoC for tracking down an
> inconsistency between kernel and uclibc.
>
> Also, I am hoping to "catch-up" to more recent kernel releases if any
> one has time to track down the usual upgrade bugs & etc. plus test
> please contact us.
Hi Rich, Stefan,
Great work. No problems building (I left out the Ethernet), but it blew
up early when booting with an instruction alignment exception. Here's
the console log.
Copying Linux... Ok, booting the kernel.
****************** counters reset ******************
cycles 132648746, insn #9127627
****************** counters reset ******************
Runarunaround: Unhandled exception 0x600: EPC=0xc0008518
exit(34417)
@reset : cycles 132648746, insn #9127627
@exit : cycles 252659526, insn #14069071
diff : cycles 120010780, insn #4941444
That looks to be in the middle of _timer_interrupt (starts at c00084f4).
Here's the disassembly from GDB:
0xc00084f4 <timer_interrupt+0>: l.addi r1,r1,-40
0xc00084f8 <timer_interrupt+4>: l.sw 24(r1),r9
0xc00084fc <timer_interrupt+8>: l.sw 28(r1),r12
0xc0008500 <timer_interrupt+12>: l.sw 32(r1),r14
0xc0008504 <timer_interrupt+16>: l.sw 36(r1),r16
0xc0008508 <timer_interrupt+20>: l.ori r14,r3,0x0
0xc000850c <timer_interrupt+24>: l.addi r16,r0,112
0xc0008510 <timer_interrupt+28>: l.addi r12,r1,0
0xc0008514 <timer_interrupt+32>: l.movhi r5,0x8000
0xc0008518 <timer_interrupt+36>: l.lwz r3,48(r10)
0xc000851c <timer_interrupt+40>: l.and r4,r12,r5
0xc0008520 <timer_interrupt+44>: l.and r3,r3,r5
0xc0008524 <timer_interrupt+48>: l.sfeq r4,r3
0xc0008528 <timer_interrupt+52>: l.bnf <timer_interrupt+92>
0xc000852c <timer_interrupt+56>: l.nop 0
0xc0008530 <timer_interrupt+60>: l.movhi r5,0x7fff
0xc0008534 <timer_interrupt+64>: l.ori r5,r5,0xffff
0xc0008538 <timer_interrupt+68>: l.and r12,r12,r5
This looks suspicious. The instruction at c0008518 is an indexed load
off r10, which doesn't seem to be initialized, so could easily be
misaligned. The code for timer_interrupt (in arch/or32/kernel/time.c)
is:
irqreturn_t timer_interrupt(struct pt_regs * regs)
{
check_stack(regs, __FILE__, __FUNCTION__, __LINE__);
/*
* Here we are in the timer irq handler. We just have irqs locally
* disabled but we don't know if the timer_bh is running on the other
* CPU. We need to avoid to SMP race with it. NOTE: we don' t need
* the irq version of write_lock because as just said we have irq
* locally disabled. -arca
*/
write_seqlock(&xtime_lock);
do_timer_interrupt(regs);
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}
This looks like a problem with the write_seqlock macro. This in turn
uses spin_lock. I notice we don't have our own asm/spinlock.h. I wonder
if something generic is causing problems?
I used the latest or1ksim (0.3rc2), with an xterm as console. Running on
Fedora 9 Linux. Let me know if you'd like me to
A note on the sim.cfg file. This could do with getting rid of the bus
entries (for each section they are ignored but give a bucket of
warnings). Also it makes sense for clkcycle to be 10ns, not 10000ns.
For the record I got some warnings. Two when making the menuconfig:
SHIPPED scripts/kconfig/zconf.hash.c
HOSTCC scripts/kconfig/zconf.tab.o
scripts/kconfig/lex.zconf.c:1642: warning: ‘input’ defined but not used
HOSTLD scripts/kconfig/mconf
scripts/kconfig/mconf arch/or32/Kconfig
drivers/macintosh/Kconfig:121:warning: 'select' used by config symbol
'PMAC_APM_EMU' refers to undefined symbol 'APM_EMULATION'
#
# configuration written to .config
#
I also got some warnings when doing the main build:
$ make vmlinux ARCH=or32 CROSS_COMPILE=/opt/or32/bin/or32-uclinux-
HOSTLD scripts/kconfig/conf
scripts/kconfig/conf -s arch/or32/Kconfig
drivers/macintosh/Kconfig:121:warning: 'select' used by config symbol
'PMAC_APM_EMU' refers to undefined symbol 'APM_EMULATION'
CHK include/linux/version.h
UPD include/linux/version.h
CHK include/linux/utsrelease.h
UPD include/linux/utsrelease.h
SYMLINK include/asm -> include/asm-or32
CC arch/or32/kernel/asm-offsets.s
GEN include/asm-or32/asm-offsets.h
CALL scripts/checksyscalls.sh
<stdin>:101:2: warning: #warning syscall restart_syscall not implemented
<stdin>:1345:2: warning: #warning syscall sync_file_range not
implemented
<stdin>:1369:2: warning: #warning syscall utimensat not implemented
<stdin>:1373:2: warning: #warning syscall signalfd not implemented
<stdin>:1377:2: warning: #warning syscall timerfd not implemented
<stdin>:1381:2: warning: #warning syscall eventfd not implemented
<stdin>:1385:2: warning: #warning syscall fallocate not implemented
CC scripts/mod/empty.o
HOSTCC scripts/mod/mk_elfconfig
MKELF scripts/mod/elfconfig.h
...
LD arch/or32/lib/built-in.o
CC arch/or32/kernel/setup.o
arch/or32/kernel/setup.c:396: warning: function declaration isn't a
prototype
arch/or32/kernel/setup.c:397: warning: function declaration isn't a
prototype
AS arch/or32/kernel/misc.o
CC arch/or32/kernel/idle.o
...
CC arch/or32/kernel/time.o
CC arch/or32/kernel/irq.o
arch/or32/kernel/irq.c: In function `request_irq':
arch/or32/kernel/irq.c:225: warning: assignment from incompatible
pointer type
AS arch/or32/kernel/entry.o
CC arch/or32/kernel/ptrace.o
arch/or32/kernel/ptrace.c:95: warning: 'set_singlestep' defined but not
used
CC arch/or32/kernel/signal.o
CC arch/or32/kernel/sys_or32.o
...
LD arch/or32/drivers/built-in.o
CC arch/or32/board/config.o
arch/or32/board/config.c:133: warning: initialization from incompatible
pointer type
LD arch/or32/board/built-in.o
gcc -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -o
arch/or32/support/tools/bintoc arch/or32/support/tools/bintoc.c
arch/or32/support/tools/bintoc.c:6: warning: return type defaults to
‘int’
arch/or32/support/tools/bintoc.c: In function ‘main’:
arch/or32/support/tools/bintoc.c:13: warning: implicit declaration of
function ‘exit’
arch/or32/support/tools/bintoc.c:13: warning: incompatible implicit
declaration of built-in function ‘exit’
arch/or32/support/tools/bintoc.c:24: warning: implicit declaration of
function ‘read’
arch/or32/support/tools/bintoc.c:55: warning: incompatible implicit
declaration of built-in function ‘exit’
arch/or32/support/tools/bintoc .initrd <
arch/or32/support/initrd-fb-03.ext2 |/opt/or32/bin/or32-uclinux-as -o
arch/or32/support/initrd.o
LD arch/or32/support/built-in.o
CC kernel/sched.o
...
CC kernel/time/timekeeping.o
CC kernel/time/ntp.o
kernel/time/ntp.c: In function `do_adjtimex':
kernel/time/ntp.c:352: warning: comparison of distinct pointer types
lacks a cast
kernel/time/ntp.c:355: warning: comparison of distinct pointer types
lacks a cast
CC kernel/time/clocksource.o
CC kernel/time/jiffies.o
...
CC mm/rmap.o
CC mm/vmalloc.o
mm/vmalloc.c: In function `unmap_kernel_range':
mm/vmalloc.c:75: warning: unused variable `start'
CC mm/bounce.o
CC mm/tiny-shmem.o
...
CC drivers/char/selection.o
CC drivers/char/keyboard.o
drivers/char/keyboard.c:1125:2: warning: #warning "Cannot generate
rawmode keyboard for your architecture yet."
CC drivers/char/vt.o
SHIPPED drivers/char/defkeymap.c
CC drivers/char/defkeymap.o
...
CC drivers/serial/serial_core.o
CC drivers/serial/8250.o
drivers/serial/8250.c: In function `serial8250_shutdown':
drivers/serial/8250.c:1951: warning: suggest parentheses around
arithmetic in operand of |
CC drivers/serial/8250_early.o
LD drivers/serial/built-in.o
...
CC lib/vsprintf.o
AR lib/lib.a
LD vmlinux.o
MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x21fc): Section mismatch: reference
to .init.text:_start_kernel (between 'jump_start_kernel' and
'_mc_init_1')
WARNING: vmlinux.o(.text+0x2200): Section mismatch: reference
to .init.text:_start_kernel (between 'jump_start_kernel' and
'_mc_init_1')
WARNING: vmlinux.o(.text+0xdad8): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '___ioremap' and
'_iounmap')
WARNING: vmlinux.o(.text+0xdadc): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '___ioremap' and
'_iounmap')
WARNING: vmlinux.o(.text+0xdb2c): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '___ioremap' and
'_iounmap')
WARNING: vmlinux.o(.text+0xdb30): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '___ioremap' and
'_iounmap')
WARNING: vmlinux.o(.text+0xdc48): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '_iounmap' and
'_ioport_map')
WARNING: vmlinux.o(.text+0xdc4c): Section mismatch: reference
to .init.data:___setup_str_nosoftlockup_setup (between '_iounmap' and
'_ioport_map')
GEN .version
CHK include/linux/compile.h
UPD include/linux/compile.h
CC init/version.o
LD init/built-in.o
LD vmlinux
SYSMAP System.map
/opt/or32/bin/or32-uclinux-objcopy -O binary vmlinux vmlinux.bin
ATB,
Jeremy
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Tel: +44 (1202) 416955
Cell: +44 (7970) 676050
SkypeID: jeremybennett
Email:
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.config (18K) 