i.MX6 DualLite stucked at early boot
AudioONE
audioone.official at gmail.com
Wed Dec 19 04:30:04 UTC 2018
hi guys
I've got a small brand eval-board which built with MCIMX6U6AVM08AC and
running FreeBSD 11.0.1(I have tried HEAD version, 12.0-BETA3, it didn't
work too), ubldr stage is fine but it stucked at "reinit_mmu"
function(FreeBSD might be have assembly printf for debug environment,
because aseeembly code just like a blackbox when you without JTAG debugger
in hand )
======================================
Booting from disk0s2:
/
/boot/kernel/kernel data=0x57b564+0x58a9c syms=[0x4+0x6e9d0+0x4+0x77ada]
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Kernel entry at 0x0x12200100...
Kernel args: (null)
EARL_DEBUG: pmap_kern_ttb 0x1290004a, actlr_mask 0xc1, actlr_set 0x41
(nothing)
======================================
when I trace the code to "reinit_mmu" function, commented code like this,
kernel panic and reported "Asynchronous External Abort". Am I the only one
who meet this WEIRD case? I got AM3352/AM3354/Zynq7 platforms, they works
fine with kernel 11.0.1. Is it something different between i.MX6
Dual(Wandboard) and i.MX6 DualLite?
/* Enable caches. */
mrc CP15_SCTLR(r7)
// it will be stucked if don't commented this code
/* orr r7, #CPU_CONTROL_DC_ENABLE //DEBUG
orr r7, #CPU_CONTROL_IC_ENABLE //DEBUG
orr r7, #CPU_CONTROL_BPRD_ENABLE //DEBUG */
mcr CP15_SCTLR(r7)
DSB
mcr CP15_TTBR0(r4) /* Set new TTB */
DSB
ISB
// it will be stucked if don't commented this code
/* mcr CP15_TLBIALL /// Flush TLB //DEBUG */
mcr CP15_BPIALL /* Flush Branch predictor */
DSB
ISB
U-Boot 2016.05 (Dec 16 2018 - 13:09:25 +0800)
CPU: Freescale i.MX6DL rev1.2 at 792 MHz
Reset cause: POR
Board: MX6DL-Armadillo2
DRAM: 1 GiB
WARNING: Caches not enabled
MMC: FSL_SDHC: 0
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: FEC
Error: FEC address not set.
Hit any key to stop autoboot: 0
reading ubldr.bin
185536 bytes read in 40 ms (4.4 MiB/s)
## Starting application at 0x12000000 ...
Consoles: U-Boot console
Compatible U-Boot API signature found @0x4fd703e0
FreeBSD/armv6 U-Boot loader, Revision 1.2
(root at freebsd-x250, Sat Dec 15 17:17:42 HKT 2018)
DRAM: 1024MB
Number of U-Boot devices: 2
U-Boot env: loaderdev not set, will probe all devices.
Found U-Boot device: disk
Probing all disk devices...
Checking unit=0 slice=<auto> partition=<auto>... good.
Booting from disk0s2:
/
/boot/kernel/kernel data=0x57b564+0x58a9c syms=[0x4+0x6e9d0+0x4+0x77ada]
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Kernel entry at 0x0x12200100...
Kernel args: (null)
EARL_DEBUG: pmap_kern_ttb 0x1290004a, actlr_mask 0xc1, actlr_set 0x41
EARL_DEBUG: cpu_setup pass
EARL_DEBUG: init_param1 pass
initarm: console initialized
arg1 kmdp = 0xc26bc000
boothowto = 0x00000000
dtbp = 0xc2547eb8
lastaddr1: 0x128bd000
loader passed (static) kenv:
loader_envp = 0xc26bb000
c26bb000 LINES=24
c26bb009 console=uboot
c26bb017 currdev=disk0s2:
c26bb028 kerflag=
c26bb031 kernelname=/boot/kernel/kernel
c26bb050 loaddev=disk0s2:
c26bb061 prompt=loader>
c26bb070 twiddle_divisor=1
EARL_DEBUG: platform_late_init pass
Fatal kernel mode data abort: 'Asynchronous External Abort' on write
trapframe: 0xc257c688
FSR=00001c06, FAR=Invalid, spsr=600000d3
r0 =00000100, r1 =600001d3, r2 =600000d3, r3 =30c52079
r4 =00000000, r5 =c257c7e4, r6 =c25b3280, r7 =c25b3280
r8 =c2578058, r9 =00000000, r10=c25ce154, r11=c257c7d8
r12=c2577c24, ssp=c257c718, slr=c244b3c0, pc =c244b3d4
panic: Fatal abort
cpuid = 0
Uptime: 1s
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