linux_dsm_epyc7002/arch/powerpc/platforms
Christophe Leroy 6b7c095a51 powerpc/83xx: map IMMR with a BAT.
On mpc83xx with a QE, IMMR is 2Mbytes and aligned on 2Mbytes boundarie.
On mpc83xx without a QE, IMMR is 1Mbyte and 1Mbyte aligned.

Each driver will map a part of it to access the registers it needs.
Some drivers will map the same part of IMMR as other drivers.

In order to reduce TLB misses, map the full IMMR with a BAT. If it is
2Mbytes aligned, map 2Mbytes. If there is no QE, the upper part will
remain unused, but it doesn't harm as it is mapped as guarded memory.

When the IMMR is not aligned on a 2Mbytes boundarie, only map 1Mbyte.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Scott Wood <oss@buserror.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/269a00951328fb6fa1be2fa3cbc76c19745019b7.1568665466.git.christophe.leroy@c-s.fr
2019-11-19 19:38:38 +11:00
..
4xx powerpc: remove the ppc44x ocm.c file 2019-08-27 13:03:33 +10:00
8xx powerpc/8xx: use the fixmapped IMMR in cpm_reset() 2019-11-19 19:38:35 +11:00
40x powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
44x powerpc: remove the ppc44x ocm.c file 2019-08-27 13:03:33 +10:00
52xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
82xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
83xx powerpc/83xx: map IMMR with a BAT. 2019-11-19 19:38:38 +11:00
85xx powerpc/85xx: remove mostly pointless mpc85xx_qe_init() 2019-11-17 01:55:42 -06:00
86xx powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
512x treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
amigaone treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cell powerpc/spufs: remove set but not used variable 'ctx' 2019-11-13 16:58:07 +11:00
chrp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
embedded6xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
maple powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
pasemi powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU pages 2019-08-19 13:20:23 +10:00
powermac powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
powernv powerpc/powernv/ioda: using kfree_rcu() to simplify the code 2019-11-13 16:58:07 +11:00
ps3 powerpc updates for 5.4 2019-09-20 11:48:06 -07:00
pseries powerpc/pseries/hotplug-memory: Change rc variable to bool 2019-11-13 16:58:10 +11:00
fsl_uli1575.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Kconfig powerpc/32s: get rid of CPU_FTR_601 feature 2019-08-28 23:19:33 +10:00
Kconfig.cputype powerpc: use the generic dma coherent remap allocator 2019-08-28 23:19:34 +10:00
Makefile powerpc: Add -Werror at arch/powerpc level 2018-10-19 00:56:17 +11:00