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powerpc/mm: Introduce MMU features

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We're soon running out of CPU features and I need to add some new
ones for various MMU related bits, so this patch separates the MMU
features from the CPU features.  I moved over the 32-bit MMU related
ones, added base features for MMU type families, but didn't move
over any 64-bit only feature yet.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt
2008-12-18 19:13:32 +00:00
committed by Paul Mackerras
parent 2ca8cf7389
commit 7c03d653cd
16 changed files with 268 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/powerpc/kernel/head_32.S
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@@ -990,12 +990,12 @@ load_up_mmu:
LOAD_BAT(1,r3,r4,r5)
LOAD_BAT(2,r3,r4,r5)
LOAD_BAT(3,r3,r4,r5)
BEGIN_FTR_SECTION
BEGIN_MMU_FTR_SECTION
LOAD_BAT(4,r3,r4,r5)
LOAD_BAT(5,r3,r4,r5)
LOAD_BAT(6,r3,r4,r5)
LOAD_BAT(7,r3,r4,r5)
END_FTR_SECTION_IFSET(CPU_FTR_HAS_HIGH_BATS)
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
blr
/*
@@ -1141,7 +1141,7 @@ clear_bats:
mtspr SPRN_IBAT2L,r10
mtspr SPRN_IBAT3U,r10
mtspr SPRN_IBAT3L,r10
BEGIN_FTR_SECTION
BEGIN_MMU_FTR_SECTION
/* Here's a tweak: at this point, CPU setup have
* not been called yet, so HIGH_BAT_EN may not be
* set in HID0 for the 745x processors. However, it
@@ -1164,7 +1164,7 @@ BEGIN_FTR_SECTION
mtspr SPRN_IBAT6L,r10
mtspr SPRN_IBAT7U,r10
mtspr SPRN_IBAT7L,r10
END_FTR_SECTION_IFSET(CPU_FTR_HAS_HIGH_BATS)
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
blr
flush_tlbs: