System Hang when we insert MBE in P2020

[udaishar]

System hangs when we insert MBE using Inject Registers on DDR controller.

Steps:

regrw r 0x2E40
regrw r 0x2E44
regrw r 0x2E48
regrw r 0x2E08
regrw w 0x2E00 0x1
regrw w 0x2E04 0x1
regrw r 0x2E04
regrw r 0x2E08
regrw w 0x2E08 0x100

I am able to see SBE interrupts getting generated If I follow the same commands (Injecting single bit error in DDR_DATA_ERR_INJECT_LO only).

[yipingwang]

Please refer to the following testing code:

#ifdef DDR_MBE
li r3,0x0003 //set 2 inject bits
#endif
lis r4,DDR_DATA_ERR_INJECT_LO@h
ori r4,r4,DDR_DATA_ERR_INJECT_LO@l
bl write_mmap
lis r3,DDR_ECC_ERR_INJECT@h
ori r3,r3,DDR_ECC_ERR_INJECT@l
bl read_mmap
ori r3,r3,(DRR_ECC_ERR_INJECT_EIEN)@l //set EIEN

lis r4,DDR_ECC_ERR_INJECT@h
ori r4,r4,DDR_ECC_ERR_INJECT@l
bl write_mmap
sync //store a line from L1D into DDR while error inject is enabled
dcbf r0,r8
msync
//clear DDR error inject
lis r3,DDR_ECC_ERR_INJECT@h
ori r3,r3,DDR_ECC_ERR_INJECT@l
bl read_mmap
lis r4,DRR_ECC_ERR_INJECT_EIEN@h
ori r4,r4,DRR_ECC_ERR_INJECT_EIEN@l
andc r3,r3,r4 //clear EIEN

lis r4,DDR_ECC_ERR_INJECT@h
ori r4,r4,DDR_ECC_ERR_INJECT@l
bl write_mmap
xor r3,r3,r3
lis r4,DDR_DATA_ERR_INJECT_LO@h
ori r4,r4,DDR_DATA_ERR_INJECT_LO@l

bl write_mmap

Have a great day,
TIC

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