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mpc83xx: Correct the README for DDR ECC

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Update the README for DDR ECC, change the name
to README.mpc83xx.ddrecc.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
This commit is contained in:
Dave Liu 2007-08-01 15:00:59 +08:00 committed by Kim Phillips
parent daab8c67d2
commit 47e8bc8467
1 changed files with 30 additions and 30 deletions
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60
doc/README.mpc8349emds.ddrecc → doc/README.mpc83xx.ddrecc
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@ -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