【发布时间】：2021-05-19 18:30:36
【问题描述】：
我为我的 MicroZed 开发板创建了一个非常通用的 PetaLinux 2020.1 项目，并成功构建了所有内容。我相信我已经正确配置了 SD 卡，并且我的 RootFS 就位。 FSBL/U-Boot 正确加载并运行，但在启动 Linux 时，它会崩溃并在控制台上显示以下输出。
Booting Linux on physical CPU 0x0
Linux version 5.4.0-xilinx-v2020.1 (oe-user@oe-host) (gcc version 9.2.0 (GCC)) #1 SMP PREEMPT Sat Feb 13 19:25:18 UTC 2021
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt: Machine model: xlnx,zynq-7000
earlycon: cdns0 at MMIO 0xe0001000 (options '115200n8')
printk: bootconsole [cdns0] enabled
Memory policy: Data cache writealloc
cma: Reserved 16 MiB at 0x3f000000
percpu: Embedded 15 pages/cpu s31948 r8192 d21300 u61440
Built 1 zonelists, mobility grouping on. Total pages: 260416
Kernel command line: console=ttyPS0,115200 earlycon root=/dev/mmcblk0p2 rw rootwait
Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
mem auto-init: stack:off, heap alloc:off, heap free:off
Memory: 1010888K/1048576K available (6144K kernel code, 217K rwdata, 1844K rodata, 1024K init, 131K bss, 21304K reserved, 16384K cma-rese)
rcu: Preemptible hierarchical RCU implementation.
rcu: RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
efuse mapped to (ptrval)
slcr mapped to (ptrval)
irq-xilinx: /amba/axi-interrupt-ctrl: num_irq=32, edge=0x0
8<--- cut here ---
Unhandled fault: imprecise external abort (0xc06) at 0x00000000
pgd = (ptrval)
[00000000] *pgd=00000000
Internal error: Oops - BUG: c06 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-xilinx-v2020.1 #1
Hardware name: Xilinx Zynq Platform
PC is at xintc_write+0x10/0x1c
LR is at xilinx_intc_of_init+0x138/0x2a4
pc : [<c033fca0>] lr : [<c0a161e4>] psr: 600000d3
sp : c0b01f38 ip : ef00a0c0 fp : c0869cc4
r10: 00000122 r9 : f0808000 r8 : ef6f010c
r7 : ef6f5e88 r6 : ef00a000 r5 : ffffffff r4 : f080800c
r3 : c033fc90 r2 : 00000000 r1 : ffffffff r0 : f080800c
Flags: nZCv IRQs off FIQs off Mode SVC_32 ISA ARM Segment none
Control: 18c5387d Table: 0000404a DAC: 00000051
Process swapper/0 (pid: 0, stack limit = 0x(ptrval))
Stack: (0xc0b01f38 to 0xc0b02000)
1f20: ef004380 00000000
1f40: ef00a000 c0a161e4 00000000 ef6f010c 00000008 ef0043c0 ef6f010c c0b01f74
1f60: c0b01f7c c0b01f74 00000100 c0a216d8 00000000 c0b01f74 c0b01f74 c0b01f7c
1f80: c0b01f7c c0b03c48 00000000 c0a2da30 c0b03c40 c0b364c0 00000000 c0b364c0
1fa0: 00000001 c0a2da40 00000000 c0a03558 c0b46088 c0a00b3c ffffffff ffffffff
1fc0: 00000000 c0a00578 00000000 c0a2da40 00000000 c0b03c48 c0a00330 00000051
1fe0: 10c0387d 00000000 1fff7000 413fc090 18c5387d 00000000 00000000 00000000
[<c033fca0>] (xintc_write) from [<c0a161e4>] (xilinx_intc_of_init+0x138/0x2a4)
[<c0a161e4>] (xilinx_intc_of_init) from [<c0a216d8>] (of_irq_init+0x1e4/0x288)
[<c0a216d8>] (of_irq_init) from [<c0a03558>] (init_IRQ+0x68/0x78)
[<c0a03558>] (init_IRQ) from [<c0a00b3c>] (start_kernel+0x224/0x440)
[<c0a00b3c>] (start_kernel) from [<00000000>] (0x0)
Code: e92d4070 e1a04000 e1a05001 f57ff04e (ebf74e45)
random: get_random_bytes called from init_oops_id+0x20/0x3c with crng_init=0
---[ end trace 0000000000000000 ]---
Kernel panic - not syncing: Attempted to kill the idle task!
---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---
我可以就如何追踪潜在问题提出一些建议，这可能是我的某种错误配置，因为 Google/StackOverflow 并没有引导我到任何似乎适用的地方。鉴于我试图从开箱即用的设置中改变的很少，看来这可能是一个常见问题。谢谢！
【问题讨论】：
-
git grep -n -w xintc_write对Linux内核源代码的使用会对你有所帮助。 -
我只看到一个补丁文件的变化，它改变了签名： -static void xintc_write(struct xintc_irq_chip *irqc, int reg, u32 data) +static void xintc_write(void __iomem *addr, u32数据）我无法确定这是否有意义 - 我可以理解这种变化。
-
我想知道为什么
xintc_write被拉出来了——我的框图中没有那个组件，只有处理系统、一些 GPIO 和一个未使用的计时器......
标签： embedded-linux xilinx petalinux