diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.mpc83xx.ddrecc (renamed from doc/README.mpc8349emds.ddrecc) | 60 |
1 files changed, 30 insertions, 30 deletions
diff --git a/doc/README.mpc8349emds.ddrecc b/doc/README.mpc83xx.ddrecc index eb249c3..0029f08 100644 --- a/doc/README.mpc8349emds.ddrecc +++ b/doc/README.mpc83xx.ddrecc @@ -15,10 +15,10 @@ IMPORTANT NOTICE: enabling injecting multiple-bit errors is potentially dangerous as such errors are NOT corrected by the controller. Therefore caution should be taken when enabling the injection of multiple-bit errors: it is only safe when used on a carefully selected memory area and used under control of -the 'ecc test' command (see example 'Injecting Multiple-Bit Errors' below). In -particular, when you simply set the multiple-bit errors in inject mask and -enable injection, U-Boot is very likely to hang quickly as the errors will be -injected when it accesses its code, data etc. +the 'ecc testdw' 'ecc testword' command (see example 'Injecting Multiple-Bit +Errors' below). In particular, when you simply set the multiple-bit errors in +inject mask and enable injection, U-Boot is very likely to hang quickly as the +errors will be injected when it accesses its code, data etc. Use cases for DDR 'ecc' command: @@ -40,7 +40,7 @@ Injecting Single-Bit Errors 2. Run test over some memory region -=> ecc test 200000 10 +=> ecc testdw 200000 10 3. Check ECC status @@ -61,57 +61,57 @@ Memory Error Detect: 16 errors were generated, Single-Bit Error flag was not set as Single Bit Error Counter did not reach Single-Bit Error Threshold. -4. Make sure used memory region got re-initialized with 0xcafecafe pattern +4. Make sure used memory region got re-initialized with 0x0123456789abcdef => md 200000 -00200000: cafecafe cafecafe cafecafe cafecafe ................ -00200010: cafecafe cafecafe cafecafe cafecafe ................ -00200020: cafecafe cafecafe cafecafe cafecafe ................ -00200030: cafecafe cafecafe cafecafe cafecafe ................ -00200040: cafecafe cafecafe cafecafe cafecafe ................ -00200050: cafecafe cafecafe cafecafe cafecafe ................ -00200060: cafecafe cafecafe cafecafe cafecafe ................ -00200070: cafecafe cafecafe cafecafe cafecafe ................ +00200000: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200010: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200020: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200030: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200040: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200050: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200060: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200070: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... 00200080: deadbeef deadbeef deadbeef deadbeef ................ 00200090: deadbeef deadbeef deadbeef deadbeef ................ - Injecting Multiple-Bit Errors ----------------------------- 1. Set more than 1 bit in Data Path Error Inject Mask -=> ecc injectdatahi 5 +=> ecc injectdatahi 1 +=> ecc injectdatalo 1 2. Run test over some memory region -=> ecc test 200000 10 +=> ecc testword 200000 1 3. Check ECC status => ecc status ... -Memory Data Path Error Injection Mask High/Low: 00000005 00000000 +Memory Data Path Error Injection Mask High/Low: 00000001 00000001 ... Memory Error Detect: - Multiple Memory Errors: 1 + Multiple Memory Errors: 0 Multiple-Bit Error: 1 Single-Bit Error: 0 ... -Observe that both Multiple Memory Errors and Multiple-Bit Error flags are set. +The Multiple Memory Errors flags not set and Multiple-Bit Error flags are set. -4. Make sure used memory region got re-initialized with 0xcafecafe pattern +4. Make sure used memory region got re-initialized with 0x0123456789abcdef => md 200000 -00200000: cafecafe cafecafe cafecafe cafecafe ................ -00200010: cafecafe cafecafe cafecafe cafecafe ................ -00200020: cafecafe cafecafe cafecafe cafecafe ................ -00200030: cafecafe cafecafe cafecafe cafecafe ................ -00200040: cafecafe cafecafe cafecafe cafecafe ................ -00200050: cafecafe cafecafe cafecafe cafecafe ................ -00200060: cafecafe cafecafe cafecafe cafecafe ................ -00200070: cafecafe cafecafe cafecafe cafecafe ................ +00200000: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200010: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200020: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200030: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200040: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200050: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200060: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... +00200070: 01234567 89abcdef 01234567 89abcdef .#Eg.....#Eg.... 00200080: deadbeef deadbeef deadbeef deadbeef ................ 00200090: deadbeef deadbeef deadbeef deadbeef ................ @@ -140,7 +140,7 @@ Test Single-Bit Error Counter and Threshold ... Memory Single-Bit Error Management (0..255): Single-Bit Error Threshold: 255 - Single Bit Error Counter: 60 + Single Bit Error Counter: 199 Memory Error Detect: Multiple Memory Errors: 1 |