I already mentioned shortly that I seem to be unable to do
mmiotrace. For example, I know that the I2C Data register of my
CPU (i.MX21) is at physical address 0x10012010.
Now, I can do the following:
HaRET(1)# clear TRACES
HaRET(2)# HaRET(3)# watch TRACES 4
Beginning memory tracing.
Watching TRACES(00): Addr b8012010(@10012010)
000.000 TRACES I2DR=000000ff: D=ff
001.586 TRACES I2DR: D(3 7)=77
001.989 TRACES I2DR: D(2)=73
002.352 TRACES I2DR: D(2)=77
002.704 TRACES I2DR: D(2)=73
But I'm now quite unsure if I get *ALL* access to the
data-register.
Now, the "DUMP MMU" command gives me this output:
HaRET(4)# dump mmu 1 0x10012000 0x10
----- Virtual address map -----
cp15: r1=0005327f r2=c0480000 r3=00000001 r13=18000000
Descriptor flags legend:
C: Cacheable B: Bufferable D: Domain #
AP: Access Permissions (for up to 4 slices):
0: No Access 1: Supervisor mode read/write
2: User mode read 3: User mode read/write
Virtual | Physical | Description | Flags
address | address | |
----------+----------+---------------+----------------------
98000000 | 10000000 | 1MB section | CB AP=1
b8000000 | 10000000 | 1MB section | AP=1
Note: "dump mmu 2" (not 1) gives exactly the same output. I'm
unsure if this is right.
If I understand this right, then there are two virtual addresses
for this physical address. I'll simply add mmiotrace-commands for
both of them:
HaRET(5)# clear TRACES
HaRET(6)# addlist mmutrace 0x98012010 4
HaRET(7)# addlist mmutrace 0x98012010 4
HaRET(8)# wirq 6
I have a bunch of "ibit IRQS" so that I don't see every
uninteresting stuff, e.g. no Touchscreen Interrupts.
irq:8003d...@a01843f8=809fb0ec abort:80072...@a01843f0=809fb110
prefetch:8003c...@a01843ec=809fb13c data=809ba000 sizes=c:000014e4,t:000454e4
Beginning memory tracing.
Watching IRQS(00): Addr b8040048(@10040048)
Watching IRQS(01): Addr b804004c(@1004004c)
00: Mapping 98000000(@10000000) accesses to e1100000 (tbl 1000040e)
01: Mapping b8000000(@10000000) accesses to e1200000 (tbl 10000402)
MMU table merging disabled
Replacing windows exception handlers...
Finished installing exception handlers.
000.000 IRQS INTSRCH=00000000:
000.000 IRQS INTSRCL=04000000: INT_GPT1=1
Restoring windows exception handlers...
Finished restoring windows exception handlers.
Handled 6154 irq, 80582 abort, 231 prefetch, 0 lost, 0 errors
But here I expected some output, it just didn't work.
Any ideas?
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