关闭uboot MMU 会导致android2.3 S5pv210 系统不稳定？！why

时间：2014-10-24 10:48:53 阅读：360 评论：0 收藏：0 [点我收藏+]

============问题描述============

在uboot里面屏蔽了MMU 使能
//#define CONFIG_ENABLE_MMU
就导致android 2.3 在S5pv210 上不稳定了，如果没屏蔽就稳定很多，why？！
坑爹的人啊，问了一些做了几年linux和android的人说没影响的，啥玩意啊，怎么会这么挫呢！
尤其是S5pv210 的GPU 驱动，出问题最频繁，如果是我内存参数传递有误，系统是不会启动的，怎么搞成这样呢？
有经验的过来说说吧。

下面是这几天的实验现象

重复启动会遇到这种问题,系统死机了：
[    2.896160] android_usb gadget: high speed config #1: Android Composite
[    4.510793] request_suspend_state: wakeup (3->0) at 3981410419 (2010-01-01 12:00:04.019802543 UTC)
[    4.521102] init: untracked pid 51 exited
[    4.523756] init: untracked pid 55 exited
[   13.611361] Internal error: Oops - undefined instruction: 0 [#1] PREEMPT
[   13.616584] last sysfs file: /sys/power/state
[   13.620944] Unable to handle kernel paging request at virtual address 0a0000de
[   13.628110] pgd = c0004000
[   13.630795] [0a0000de] *pgd=00000000
[   21.121137] BUG: spinlock lockup on CPU#0, /0, c0510374
[   21.124869] Backtrace:
[   21.127324] [<c0031fb8>] (dump_backtrace+0x0/0x110) from [<c0392880>] (dump_stack+0x18/0x1c)
[   21.135703]  r6:00000000 r5:c0088000 r4:c0510374 r3:e1a00005
[   21.141343] [<c0392868>] (dump_stack+0x0/0x1c) from [<c01976c4>] (do_raw_spin_lock+0x128/0x168)
[   21.150008] [<c019759c>] (do_raw_spin_lock+0x0/0x168) from [<c0395804>] (_raw_spin_lock_irq+0x2c/0x30)
[   21.159272]  r8:00000005 r7:c049cd52 r6:c0088038 r5:c008a0d0 r4:c008a0d0
[   21.165951] [<c03957d8>] (_raw_spin_lock_irq+0x0/0x30) from [<c0032330>] (die+0x30/0x1cc)
[   21.174098] [<c0032300>] (die+0x0/0x1cc) from [<c00348cc>] (__do_kernel_fault+0x6c/0x8c)
[   21.182149]  r8:00000000 r7:00000005 r6:00000000 r5:c008a0d0 r4:0a0000de
[   21.188827] [<c0034860>] (__do_kernel_fault+0x0/0x8c) from [<c0034acc>] (do_page_fault+0x1e0/0x1fc)
[   21.197834]  r8:00000000 r7:0a0000de r6:00000001 r5:c008a0d0 r4:c0571fd0
[   21.204333] r3:c008a0d0
[   21.206939] [<c00348ec>] (do_page_fault+0x0/0x1fc) from [<c0034b98>] (do_translation_fault+0x24/0xa0)
[   21.216125] [<c0034b74>] (do_translation_fault+0x0/0xa0) from [<c002d2f4>] (do_DataAbort+0x3c/0xa0)
[   21.225131]  r6:0a0000de r5:c051044c r4:00000005 r3:c05103fc
[   21.230769] [<c002d2b8>] (do_DataAbort+0x0/0xa0) from [<c002da6c>] (__dabt_svc+0x4c/0x60)

又遇到这种问题了
ext4format 按复位10次不到又死机了。
[   11.329304] Modules linked in:
[   11.332340] CPU: 0    Not tainted  (2.6.35.7 #1)
[   11.336932] PC is at 0xe41ab000
[   11.340059] LR is at do_PrefetchAbort+0x3c/0xa0
[   11.344558] pc : [<e41ab000>]    lr : [<c002d254>]    psr: 60000193
[   11.344564] sp : ee9d3c28  ip : 00000004  fp : 3162c3ef
[   11.355994] r10: c051e8d8  r9 : 20000193  r8 : 3b1235a2
[   11.361194] r7 : ee9d3cb0  r6 : e52d1004  r5 : c051063c  r4 : c002d2f4
[   11.367693] r3 : c05105fc  r2 : ee9d3cb0  r1 : c002d2f4  r0 : e52d1004
[   11.374194] Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   11.381385] Control: 10c5387d  Table: 4e9d4019  DAC: 00000015
[   11.387103]
[   11.387106] PC: 0xe41aaf80:
[   11.391348] af80  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   11.399494] afa0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   11.407639] afc0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   11.415785] afe0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   11.423931] b000  ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[   11.432076] b020  ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[   11.440222] b040  ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[   11.448368] b060  ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000 ff000000
[   11.456514]
[   11.456516] LR: 0xc002d1d4:
[   11.460760] d1d4  e50be09c e3a0e004 e50b5098 e50be0a4 e28ee002 e50bc0a0 e58de000 eb0014ce
[   11.468905] d1f4  e24bd020 e89da9f0 c051035c c051036c c054b344 c049c790 c049c7ba 00030001
[   11.477051] d214  c049c7be e1a0c00d e92dd8f0 e24cb004 e24dd088 e201cb01 e1a04001 e201100f
[   11.485196] d234  e59f3070 e181c32c e3841102 e1a06000 e1a07002 e083520c e1a0e00f e793f20c
[   11.493342] d254  e3500000 0a000011 e595100c e1a02004 e1a03006 e59f0040 eb0d95c2 e595c008
[   11.501488] d274  e595e004 e1a01007 e1a03004 e59f002c e24b209c e50bc094 e50be09c e3a0c000
[   11.509633] d294  e50b6090 e58dc000 e50bc098 eb0014a2 e24bd01c e89da8f0 c05105fc c049cc57
[   11.517779] d2b4  c04b5b5c e1a0c00d e92dd8f0 e24cb004 e24dd088 e201cb01 e1a04001 e201100f
[   11.525925]
[   11.525928] SP: 0xee9d3ba8:

还是wince稳定啊。
晕ext3format 之后又来了一次不启动
[    2.712437] warning: `rild‘ uses 32-bit capabilities (legacy support in use)
[    3.021029] android_usb gadget: high speed config #1: Android Composite
[   10.009783] request_suspend_state: wakeup (3->0) at 9480398418 (2010-01-01 12:00:09.518617168 UTC)
[   12.192678] Unable to handle kernel paging request at virtual address 76453320
[   12.198419] Unable to handle kernel paging request at virtual address 300af87d
[   12.205610] Unable to handle kernel paging request at virtual address 300af87d
[   12.212802] Unable to handle kernel paging request at virtual address 300af87d
[   12.219995] Unable to handle kernel paging request at virtual address 300af87d
[   12.227187] Unable to handle kernel paging request at virtual address 300af87d
[   12.234380] Unable to handle kernel paging request at virtual address 300af87d
[   12.241572] Unable to handle kernel paging request at virtual address 300af87d
[   12.248765] Unable to handle kernel paging request at virtual address 300af87d
[   12.255957] Unable to handle kernel paging request at virtual address 300af87d
[   12.263149] Unable to handle kernel paging request at virtual address 300af87d
[   12.270342] Unable to handle kernel paging request at virtual address 300af87d

============解决方案1============

你这个错误像是LINUX下的典型错误啊！

关闭uboot MMU 会导致android2.3 S5pv210 系统不稳定？！why

标签：android io os ar for sp on 问题 cti

原文地址：http://www.cnblogs.com/hugangyan86/p/4047406.html

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