Hi,
I think you need to go more in detail in what this map_region
function does.. eg: what is in the MAS registers before the tlbwe
happen (checking field by field) and what is the tlb which is
created / expected.
I got a pretty similar problem with a MAV V2 MMU and fixed size
tlb.. But I don't think it affects your device.. I'm not totally
sure though.
Fred
On 08/18/2017 03:48 PM, BALATON Zoltan wrote:
Hello,
While trying to get my recently posted Sam460ex emulation working
(more details on that here:
http://lists.nongnu.org/archive/html/qemu-ppc/2017-08/msg00112.html)
I'm stuck at a point with BookE MMU behaviour that seems to
differ from real hardware but I don't know much about it so I
hope someone with more knowledge can spot the problem or give
some hints where to look for it.
When trying to boot AROS it currently fails when mmu_init() is
run from
https://github.com/ezrec/AROS-mirror/blob/ABI_V1/AROS/arch/ppc-sam440/kernel/mmu.c
(around line 273 I think).
With a lot of debug enabled I see this:
[KRN] MMU Init
[KRN] lowest = 007f74e8, base = 00800000, highest = 00c081f0
[KRN] Kernel size: 4128KB code, 34KB data
[KRN] Executing at ff841658, stack at ff7fd260, bss at ff7fd848,
data at ff7fffb8
[KRN] TLB0f: -I---rwxrwx 00000000 - 0fffffff : 00000000:
0:00000290 1:00000000 2:0000043f
[KRN] TLB02: -I-G-rw-rw- 80000000 - 8fffffff : 80000000:
0:80000290 1:8000000c 2:0000051b
[KRN] TLB03: -I-G-rw-rw- 90000000 - 9fffffff : 90000000:
0:90000290 1:9000000c 2:0000051b
[KRN] TLB04: -I-G-rw-rw- a0000000 - afffffff : a0000000:
0:a0000290 1:a000000d 2:0000051b
[KRN] TLB05: -I-G-rw-rw- b0000000 - bfffffff : b0000000:
0:b0000290 1:b000000d 2:0000051b
[KRN] TLB06: -I-G-rw-rw- c0000000 - cfffffff : c0000000:
0:c0000290 1:c000000d 2:0000051b
[KRN] TLB01: -I-G-rw-rw- d0000000 - dfffffff : 00000000:
0:d0000290 1:0000000c 2:0000051b
[KRN] TLB07: -I-G-rw-rw- e0000000 - e0ffffff : 00000000:
0:e0000270 1:0000000d 2:0000051b
[KRN] TLB08: -I-G-rw-rw- e1000000 - e1ffffff : 20000000:
0:e1000270 1:2000000d 2:0000051b
[KRN] TLB0e: -I-G-rwxrwx e2000000 - e20fffff : bff00000:
0:e2000250 1:bff00004 2:0000053f
[KRN] TLB09: -I-G-rw-rw- e3000000 - e30003ff : 10000000:
0:e3000200 1:1000000d 2:0000051b
[KRN] TLB0a: -I-G-rw-rw- e3001000 - e30013ff : 30000000:
0:e3001200 1:3000000d 2:0000051b
[KRN] TLB0b: -I-G-rw-rw- e4000000 - e4003fff : 08010000:
0:e4000220 1:0801000c 2:0000051b
[KRN] TLB0c: -I---rwxrwx e5000000 - e50fffff : 00000000:
0:e5000250 1:00000004 2:0000043f
[KRN] TLB0d: -I-G-rwxrwx ef000000 - efffffff : ef000000:
0:ef000270 1:ef000004 2:0000053f
[KRN] TLB00: -I---rwxrwx ff000000 - ffffffff : 00000000:
0:ff000270 1:00000000 2:0000043f
[KRN] map_region(007f7000, ff7f7000, 00009000, 081b):
[KRN] TLB00: 007f7000 - 007f7fff : ff7f7000 - ff7f7fff:
helper_440_tlbwe word 0 entry 0 value ff7f7210
tlb_flush_nocheck: (count: 36)
helper_440_tlbwe word 1 entry 0 value 007f7000
tlb_flush_nocheck: (count: 37)
helper_440_tlbwe word 2 entry 0 value 0000081b
ppcemb_tlb_check: TLB 0 address ff7fd648 PID 0 <=> ff7f7000
fffff000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 1 address ff7fd648 PID 0 <=> d0000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 2 address ff7fd648 PID 0 <=> 80000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 3 address ff7fd648 PID 0 <=> 90000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 4 address ff7fd648 PID 0 <=> a0000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 5 address ff7fd648 PID 0 <=> b0000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 6 address ff7fd648 PID 0 <=> c0000000
f0000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 7 address ff7fd648 PID 0 <=> e0000000
ff000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 8 address ff7fd648 PID 0 <=> e1000000
ff000000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 9 address ff7fd648 PID 0 <=> e3000000
fffffc00 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 10 address ff7fd648 PID 0 <=> e3001000
fffffc00 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 11 address ff7fd648 PID 0 <=> e4000000
ffffc000 0 3b
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 12 address ff7fd648 PID 0 <=> e5000000
fff00000 0 7f
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 13 address ff7fd648 PID 0 <=> ef000000
ff000000 0 7f
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 14 address ff7fd648 PID 0 <=> e2000000
fff00000 0 7f
mmubooke_check_tlb: TLB entry not found
ppcemb_tlb_check: TLB 15 address ff7fd648 PID 0 <=> 00000000
f0000000 0 7f
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_check_tlb: TLB entry not found
mmubooke_get_physical_address: access refused ff7fd648 =>
ffffffffffffffff 0 -1
Apparently this works on real hardware (although I could not
check because I don't have access to it and found no logs proving
it) but fails in emulation so it may be a bug or some difference
in emulation. Does anyone have any idea? Could this be related to
caching/shadow TLBs on real hardware that are not emulated? How
could this be fixed in QEMU?
Regards,
BALATON Zoltan
