[Skiboot] [PATCH] hdata: Respect OCC and HOMER resevations

[Vaidyanathan Srinivasan]

* Oliver O'Halloran <oohall at gmail.com> [2017-05-15 16:31:03]:

> In the past we've ignored these since Hostboot insisted in exporting
> broken reservations and the OCC was not being used yet. This situation
> seems to have resolved itself so we should respect the reservations that
> hostboot provides.
> 
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>

Tested-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>

Current build of hostboot has the right HDAT.  Tested on Witherspoon
system.

HDAT reservations:

[  300.082700783,7] MEM: Reserve 'ibm,homer-image' 200ffd800000-200ffdbfffff (type/inst=0x04000000)
[  300.082706054,7] MEM: Reserve 'ibm,homer-image' 200ffdc00000-200ffdffffff (type/inst=0x04000008)
[  300.082711349,7] MEM: Reserve 'ibm,occ-common-area' 200fff800000-200fffffffff (type/inst=0x04000000)

HOMER init:

[  300.084272795,6] MEM: parsing reserved memory from reserved-names/-ranges properties
[  300.084276473,7] HOMER: Init chip 0
[  300.084279370,7]   PBA BAR0 : 0x0000200ffd800000
[  300.084281869,7]   PBA MASK0: 0x0000000000300000
[  300.084284232,7]   HOMER Image at 0x200ffd800000 size 4MB
[  300.084288071,7]   PBA BAR2 : 0x0000200fff800000
[  300.084290377,7]   PBA MASK2: 0x0000000000700000
[  300.084292721,7]   OCC Common Area at 0x200fff800000 size 8MB
[  300.084295446,7] HOMER: Init chip 8
[  300.084298096,7]   PBA BAR0 : 0x0000200ffdc00000
[  300.084300411,7]   PBA MASK0: 0x0000000000300000
[  300.084302755,7]   HOMER Image at 0x200ffdc00000 size 4MB
[  300.084306306,7]   PBA BAR2 : 0x0000200fff800000
[  300.084308602,7]   PBA MASK2: 0x0000000000700000
[  300.084310913,7]   OCC Common Area at 0x200fff800000 size 8MB
[  300.084321885,7] CPU idle state device tree init

HOMER init detected that the regions are already reserved. Good.

If not we will see additional reservations like:

[  303.155949473,7] HOMER: Init chip 0
[  303.155952508,7]   PBA BAR0 : 0x0000200ffd800000
[  303.155954832,7]   PBA MASK0: 0x0000000000300000
[  303.155957157,7]   HOMER Image at 0x200ffd800000 size 4MB
[  303.155959782,4] HOMER image is not reserved! Reserving
[  303.156015736,7]   PBA BAR2 : 0x0000200fff800000
[  303.156018029,7]   PBA MASK2: 0x0000000000700000
[  303.156020313,7]   OCC Common Area at 0x200fff800000 size 8MB
[  303.156022966,7] HOMER: Init chip 8
[  303.156025609,7]   PBA BAR0 : 0x0000200ffdc00000
[  303.156027887,7]   PBA MASK0: 0x0000000000300000
[  303.156030182,7]   HOMER Image at 0x200ffdc00000 size 4MB
[  303.156032812,4] HOMER image is not reserved! Reserving
[  303.156076474,7]   PBA BAR2 : 0x0000200fff800000
[  303.156078755,7]   PBA MASK2: 0x0000000000700000
[  303.156081049,7]   OCC Common Area at 0x200fff800000 size 8MB
[  303.156083912,4] OCC common area is not reserved! Reserving


Final reservations:
[    4.367890400,5] Releasing unused memory:
[    4.367918768,5]     ibm,firmware-heap: 5377184/13631488 used
[    4.367958992,5]     ibm,firmware-allocs-memory at 200000000000: 20455424/68719476736 used
[    4.368012880,5]     ibm,firmware-allocs-memory at 0: 17309696/67347939328 used
[    4.368080400,5] Reserved regions:
[    4.368102768,5]   0x000031c00000..000033c7ffff : ibm,firmware-stacks
[    4.368147104,5]   0x000031000000..000031bfffff : ibm,firmware-data
[    4.368196448,5]   0x000030300000..000030ffffff : ibm,firmware-heap
[    4.368279712,5]   0x000030000000..0000302fffff : ibm,firmware-code
[    4.368325888,5]   0x200000000000..200001381fff : ibm,firmware-allocs-memory at 200000000000
[    4.368384640,5]   0x200ffd410000..200ffd41ffff : ibm,sbe-ffdc
[    4.368428688,5]   0x200ffd420000..200ffd42ffff : ibm,sbe-comm
[    4.368470128,5]   0x200ffd430000..200ffd43ffff : ibm,sbe-ffdc
[    4.368510704,5]   0x200ffd440000..200ffd44ffff : ibm,sbe-comm
[    4.368550304,5]   0x200ffd450000..200ffd69ffff : ibm,hbrt-code-image
[    4.368594512,5]   0x200ffd6a0000..200ffd6fffff : ibm,hbrt-target-image
[    4.368642544,5]   0x200ffd700000..200ffd7fffff : ibm,hbrt-vpd-image
[    4.368693136,5]   0x200fff800000..200fffffffff : ibm,occ-common-area
[    4.368736240,5]   0x200ffdc00000..200ffdffffff : ibm,homer-image
[    4.368784112,5]   0x200ffd800000..200ffdbfffff : ibm,homer-image
[    4.368831744,5]   0x000051c00000..000052c81fff : ibm,firmware-allocs-memory at 0

HDAT parsing works (earlier as well), now info from HDAT is also
accurate for witherspoon and overall integration of HDAT based memory
reservations for HOMER area works.

--Vaidy