Thank you, Erwin,
The kernel with your code is still crashed as following. How to handle the
case? there is no irq or fiq, I have checked the AIC_ISR, AIC_OISR,
AIC_ISNR, AIC_IPER, both of them are zero, it means there is no IRQ or FIQ
occurred. So get_irqnr_and_base returned irqnr(r0) with 0x13. It will be
handled by bad_irq_desc, is the crash related with this bad_irq_desc?
Unhandled fault: vector exception (0x800) at 0x00000000
Internal error: : 800 [#1]
CPU: 0 Not tainted (2.6.22-uc0 #90)
PC is at __irq_svc+0x54/0x80
LR is at asm_do_IRQ+0x4c/0x60
pc : [<00013a54>] lr : [<0001304c>] psr: 60000093
sp : 00757f68 ip : 00757f48 fp : 007aff14
r10: 007a6660 r9 : 000003ab r8 : 20000010
r7 : ef900003 r6 : 00000000 r5 : fff82108 r4 : ffffffff
r3 : 00000000 r2 : 00000001 r1 : 00757ef0 r0 : 00000013
Flags: nZCv IRQs off FIQs on Mode SVC_32 Segment kernel
Process linuxrc (pid: 1, stack limit = 0x00756258)
Stack: (0x00757f68 to 0x00758000)
7f60: 00000000 007aff27 00000001 007a6680 007a6680
007a6670
7f80: 00000000 ef900003 20000010 000003ab 007a6660 007aff14 007aff18
00757fb0
7fa0: 007a28a0 00013e4c 20000013 ffffffff 00000000 007aff27 00000001
007a6680
7fc0: 007a6680 007a6670 00000000 00000000 00000000 00000003 007a6660
007aff14
7fe0: 007aff18 007aff04 007a0170 007a28a0 20000010 00000000 0f008981
42200300
Backtrace:
Code: 3afffff9 11a0100d 124fe030 1afffd6a (e5878000)
Kernel panic - not syncing: Attempted to kill init!
The assemble code is listed:
00013a00 <__irq_svc>:
13a00: e24dd048 sub sp, sp, #72 ; 0x48
13a04: e98d1ffe stmib sp, {r1, r2, r3, r4, r5, r6, r7, r8,
r9, sl, fp, ip}
13a08: e890000e ldmia r0, {r1, r2, r3}
13a0c: e28d5034 add r5, sp, #52 ; 0x34
13a10: e3e04000 mvn r4, #0 ; 0x0
13a14: e28d0048 add r0, sp, #72 ; 0x48
13a18: e58d1000 str r1, [sp]
13a1c: e1a0100e mov r1, lr
13a20: e885001f stmia r5, {r0, r1, r2, r3, r4}
13a24: e59f5038 ldr r5, [pc, #56] ; 13a64
<__irq_svc+0x64>
13a28: e5956000 ldr r6, [r5]
13a2c: e3a00001 mov r0, #1 ; 0x1
13a30: e3160002 tst r6, #2 ; 0x2
13a34: 1a000003 bne 13a48 <__irq_svc+0x48>
13a38: e2800001 add r0, r0, #1 ; 0x1
13a3c: e1a060a6 mov r6, r6, lsr #1
13a40: e3500013 cmp r0, #19 ; 0x13
13a44: 3afffff9 bcc 13a30 <__irq_svc+0x30>
13a48: 11a0100d movne r1, sp
13a4c: 124fe030 subne lr, pc, #48 ; 0x30
13a50: 1afffd6a bne 13000 <__init_end>
13a54: e5878000 str r8, [r7]
13a58: e59d0040 ldr r0, [sp, #64]
13a5c: e16ff000 msr SPSR_fsxc, r0
13a60: e8ddffff ldmia sp, {r0, r1, r2, r3, r4, r5, r6, r7,
r8, r9, sl, fp, ip, sp, lr, pc}^
13a64: fff82108 swinv 0x00f82108
00013000 <asm_do_IRQ>:
13000: e59f204c ldr r2, [pc, #76] ; 13054 <.text+0x54>
13004: e0803080 add r3, r0, r0, lsl #1
13008: e1a0c00d mov ip, sp
1300c: e3500012 cmp r0, #18 ; 0x12
13010: e0803103 add r3, r0, r3, lsl #2
13014: e92dd8f0 stmdb sp!, {r4, r5, r6, r7, fp, ip, lr,
pc}
13018: e0825103 add r5, r2, r3, lsl #2
1301c: e59f6034 ldr r6, [pc, #52] ; 13058 <.text+0x58>
13020: 859f5034 ldrhi r5, [pc, #52] ; 1305c <.text+0x5c>
13024: e24cb004 sub fp, ip, #4 ; 0x4
13028: e1a04000 mov r4, r0
1302c: e5967000 ldr r7, [r6]
13030: e5861000 str r1, [r6]
13034: eb005553 bl 28588 <irq_enter>
13038: e1a00004 mov r0, r4
1303c: e1a01005 mov r1, r5
13040: e1a0e00f mov lr, pc
13044: e595f000 ldr pc, [r5]
13048: eb005554 bl 285a0 <irq_exit>
1304c: e5867000 str r7, [r6]
13050: e89da8f0 ldmia sp, {r4, r5, r6, r7, fp, sp, pc}
13054: 0011666c andeqs r6, r1, ip, ror #12
13058: 001497f8 ldreqsh r9, [r4], -r8
1305c: 00114dfc ldreqsh r4, [r1], -ip
Thanks again.
Darwin.
-----邮件原件-----
发件人: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
org] 代表 Erwin Authried
发送时间: 2007年8月2日 2:20
收件人: uClinux development list
主题: Re: [uClinux-dev] How to implement get_irqnr_and_base?
Hi Darwin,
could you please turn off the HTML crap in your e-mail, it is almost
unreadable in my mail client.
Your get_irqnr_and_base macro is probably not working. Try the following
code instead:
Regards,
Erwin
.macro disable_fiq
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \base, =AIC_ISR
ldr \irqstat, [\base]
mov \irqnr, #1
1001:
tst \irqstat, #2
bne 1002f
add \irqnr, \irqnr, #1
mov \irqstat, \irqstat, lsr #1
cmp \irqnr, #19
bcc 1001b
1002: /* EQ will be set if we reach 19 */
.endm
.macro irq_prio_table
.endm
Am Donnerstag, den 02.08.2007, 01:36 +0800 schrieb Darwin Chen:
> Dear all,
>
>
>
> I have a big problem about porting Linux-2.6.22.-uc0 to Winbond
> W90N740. When get_irqnr_and_base is implemented as following, the
> listed error will occurred. Is this get_irqnr_and_base mistake? The
> error prompts “Flags: nZCv IRQs off FIQs on Mode SVC_32 Segment
> kernel”, but the error is occurred in __irq_svc, why does the Flag
> prompt “IRQs off”?
>
>
>
> /*
>
> * include/asm/arch-w90n740/entry-macro.S
>
> *
>
> * defines machine dependent entry macros.
>
> * included in the arch/arm/kernel/entry-armv.S
>
> */
>
> #include <asm/mach-types.h>
>
> #include <asm/arch/hardware.h>
>
> #ifndef CONFIG_ARCH_W90N740
>
> #error "Did not defined WINBOND W90N740"
>
> #endif
>
> .macro get_irqnr_preamble base, tmp
>
> /* FIXME */
>
> .endm
>
>
>
> ..macro disable_fiq
>
> /* FIXME */
>
> ..endm
>
>
>
> .macro arch_ret_to_user base, tmp
>
> /* FIXME */
>
> .endm
>
>
>
> .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
>
> mov \irqnr, #0
>
> ldr r10, =AIC_IPER
>
> ldr r10,[r10]
>
> ldr \tmp, =AIC_ISNR
>
> ldr \tmp,[\tmp]
>
> mov r9,#0
>
> add r9,r9, r10, LSR#2
>
> cmp r10, \tmp
>
> bne 99f
>
> mov \irqnr, \tmp
>
> 99:
>
> .endm
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