Service manual

C-8 AlphaServer GS80/160/320 Service Manual
Test #
hex
ERROR #
<15:0>
FRU(s) Component(s) Failure Description
B-cache ECC data line test
0001 QBBx.CPUy EV, Bcache DC_STAT error bits not clear before startin
g
test.
Bcache ECC data problems
0002 DC_STAT error bits set after reading back ECC
patterns. Bcache ECC data problems.
8
Parameters all error numbers: Note: For Error numbers 2, all the following parameters apply.
For Error number 1, only P1<31:0>, P3<31:0> and P4 are valid.
P1: DC_STAT read data in <31:0>. Last Bcache address read/written in <63:32>
P2: Data pattern written to Bcache address to generate ECC in P3<63:32>
P3: CBOX Read Reg in <31:0>. ECC pattern expected to be generated in <63:32>
P3<31:0> breakdown:
<31:24> dc1_syndrome<7:0> <23:16> dc0_syndrome<7:0>
<15:9> unused <8:4> c_stat<4:0>
<3:0> c_sts<3:0>
P4: CBOX Read Reg (c_addr<42:6>) in bits <42:6>
P4<63:0> breakdown: <42:0> c_addr <42:6> (reversed c_addr<6:42> = P4<42:6>
B-cache data ECC march test
0001 QBBx.CPUy EV, Bcache DC_STAT error bits not clear before starting
0002 DC_STAT error bits not clear after reading FFFF
0003 DC_STAT error bits not clear after reading 0000
0004 DC_STAT error bits not clear after reading AAAA
0005 DC_STAT error bits not clear after reading 5555
0006 DC_STAT error bits not clear after reading 3333
0007 DC_STAT error bits not clear after reading CCCC
9
Parameters all error numbers: Note: For Error numbers 2->7, all the following parameters
apply. For Error number 1, only P1<31:0>, P3<31:0> and P4 are valid.
P1: DC_STAT read data in <31:0>. Last Bcache address read/written in <63:32>
P2: Data pattern written to Bcache address to generate ECC in P3<63:32>
P3: CBOX Read Reg in <31:0>. ECC pattern expected to be generated in <63:32>
P3<31:0> breakdown:
<31:24> dc1_syndrome<7:0> <23:16> dc0_syndrome<7:0>
<15:9> unused <8:4> c_stat<4:0>
<3:0> c_sts<3:0>
P4: CBOX Read Reg (c_addr<42:6>) in bits <42:6>
P4<63:0> breakdown:
<42:0> c_addr <42:6> (reversed c_addr<6:42>