Dears ,
I am trying to porting the kernel 4.9（also 4.12） to exynos7420 soc,but it crashed on booting , can you give me some suggestion ?many thanks.
log:[ 0.000000] Booting Linux on physical CPU 0x100[ 0.000000] Linux version 4.9.33-dirty (wangping@gavin) (gcc version 4.8.3 20140401 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.04 - Linaro GCC 4.8-2014.04) ) #2 SMP PREEMPT Wed Jun 21 09:50:18 CST 2017[ 0.000000] Boot CPU: AArch64 Processor [410fd032][ 0.000000] earlycon: exynos4210 at MMIO 0x0000000014c30000 (options '')[ 0.000000] bootconsole [exynos4210] enabled[ 0.000000] cma: Reserved 16 MiB at 0x00000000ff000000[ 0.000000] Unhandled fault: synchronous external abort (0x96000010) at 0xffffffbefe63a000[ 0.000000] Internal error: : 96000010 [#1] PREEMPT SMP[ 0.000000] Modules linked in:[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.33-dirty #2[ 0.000000] Hardware name: Samsung Exynos7 Espresso board based on EXYNOS7 (DT)[ 0.000000] task: ffffff800880bc00 task.stack: ffffff8008800000[ 0.000000] PC is at __create_pgd_mapping+0xc8/0x41c[ 0.000000] LR is at map_kernel_segment+0x88/0xbc[ 0.000000] pc : [<ffffff8008097540>] lr : [<ffffff80087754a4>] pstate: 200000c5[ 0.000000] sp : ffffff8008803db0[ 0.000000] x29: ffffff8008803db0 x28: 00c8000000000713 [ 0.000000] x27: ffffffbefe63a000 x26: 00000000deef8968 [ 0.000000] x25: 0000000000000000 x24: 00000000df07a230 [ 0.000000] x23: ffffff8008775360 x22: 00000000004f0000 [ 0.000000] x21: ffffff8008570000 x20: ffffff8008080000 [ 0.000000] x19: ffffff8008858f60 x18: 0000000000000003 [ 0.000000] x17: 0000000100000000 x16: 0000000000000000 [ 0.000000] x15: 0000000000000018 x14: 0000000040000000 [ 0.000000] x13: ffffff800886d6f0 x12: 000000000000691e [ 0.000000] x11: 0000000100000000 x10: 00000000fefff000 [ 0.000000] x9 : 0000000000000000 x8 : ffffffbefe63e000 [ 0.000000] x7 : 0000000000000000 x6 : 0000000000000001 [ 0.000000] x5 : ffffff8008775360 x4 : 00c8000000000713 [ 0.000000] x3 : 00000000004f0fff x2 : 0000000040080000 [ 0.000000] x1 : ffffffbefe63a000 x0 : 00000000085f0000 [ 0.000000] [ 0.000000] Process swapper (pid: 0, stack limit = 0xffffff8008800020)[ 0.000000] Stack: (0xffffff8008803db0 to 0xffffff8008804000)[ 0.000000] 3da0: ffffff8008803e50 ffffff80087754a4[ 0.000000] 3dc0: ffffff8008858f60 ffffff8008080000 0000000040080000 00000000004f0000[ 0.000000] 3de0: ffffff8008775558 00000000df07a230 0000000000000000 00000000deef8968[ 0.000000] 3e00: 00000000df04f530 0000000040770018 ffffff8008803e30 ffffff800880eaff[ 0.000000] 3e20: ffffff800856ffff ffffff8008570000 ffffffbefe63a000 0000000040080000[ 0.000000] 3e40: ffffff8008080000 00000001087851a0 ffffff8008803e90 ffffff8008775558[ 0.000000] 3e60: ffffff8008858f60 ffffff8008770000 ffffffbefe63a000 00000000fefff000[ 0.000000] 3e80: ffffff8008080000 00000000ff000000 ffffff8008803f20 ffffff8008772978[ 0.000000] 3ea0: ffffff8008080000 ffffff800881f998 ffffffbefe800000 0000000000000000[ 0.000000] 3ec0: 0000000000000000 00000000df07a230 0000000000000000 00000000deef8968[ 0.000000] 3ee0: 00000000df04f530 0000000040770018 ffffffbefe800000 0000000000000000[ 0.000000] 3f00: 0000000000000000 00000000df07a230 0000000000000000 ffffff800881f000[ 0.000000] 3f20: ffffff8008803fa0 ffffff8008770848 00000000df07b1c0 ffffff80087a50e8[ 0.000000] 3f40: ffffff8008807000 0000000000000000 0000000000000000 00000000df07a230[ 0.000000] 3f60: 0000000000000000 ffffff80085700a0 0000000000000001 0000000048000000[ 0.000000] 3f80: ffffffffffffffff 0000000000000000 0000000080808080 fefefefefefefefe[ 0.000000] 3fa0: ffffff8008803ff0 ffffff80087701e0 00000000df07b1c0 0000000040080000[ 0.000000] 3fc0: 0000000048000000 0000000000000000 0000000000000000 00000000df07a230[ 0.000000] 3fe0: 0000000000000000 ffffff80087a50e8 0000000000000000 000000004056625c[ 0.000000] Call trace:[ 0.000000] Exception stack(0xffffff8008803be0 to 0xffffff8008803d10)[ 0.000000] 3be0: ffffff8008858f60 0000008000000000 ffffff8008803db0 ffffff8008097540[ 0.000000] 3c00: 0000000000000007 ffffff8000000000 ffffffbefe63a000 ffffff80080f98d4[ 0.000000] 3c20: ffffff8008803c40 ffffff80080f9af8 0000000000000009 ffffff80080f98f0[ 0.000000] 3c40: ffffff8008803cb0 ffffff80080f9dfc ffffff800885f000 ffffff8008819798[ 0.000000] 3c60: ffffff8008861818 0000000000000000 0000000000000000 000000000000002a[ 0.000000] 3c80: 00000000085f0000 ffffffbefe63a000 0000000040080000 00000000004f0fff[ 0.000000] 3ca0: 00c8000000000713 ffffff8008775360 0000000000000001 0000000000000000[ 0.000000] 3cc0: ffffffbefe63e000 0000000000000000 00000000fefff000 0000000100000000[ 0.000000] 3ce0: 000000000000691e ffffff800886d6f0 0000000040000000 0000000000000018[ 0.000000] 3d00: 0000000000000000 0000000100000000[ 0.000000] [<ffffff8008097540>] __create_pgd_mapping+0xc8/0x41c[ 0.000000] [<ffffff80087754a4>] map_kernel_segment+0x88/0xbc[ 0.000000] [<ffffff8008775558>] paging_init+0x80/0x6f4[ 0.000000] [<ffffff8008772978>] setup_arch+0x1c8/0x580[ 0.000000] [<ffffff8008770848>] start_kernel+0x64/0x478[ 0.000000] [<ffffff80087701e0>] __primary_switched+0x5c/0x6c[ 0.000000] Code: b5000060 b9409fa0 350014e0 f94043a1 (f9400020) [ 0.000000] ---[ end trace 0000000000000000 ]---[ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task![ 0.000000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task!