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authorPaul Mundt <lethal@linux-sh.org>2010-01-13 18:31:48 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-01-13 18:31:48 +0900
commita0ab36689a36e583b6e736f1c99ac8c9aebdad59 (patch)
tree3efc6236d7ec0b5dbeeb311b8cd923c8e1e7f88c /arch/sh/mm/Kconfig
parent7f33306ee57bce9c79825e89c457a91025aa5aad (diff)
sh: fixed PMB mode refactoring.
This introduces some much overdue chainsawing of the fixed PMB support. fixed PMB was introduced initially to work around the fact that dynamic PMB mode was relatively broken, though they were never intended to converge. The main areas where there are differences are whether the system is booted in 29-bit mode or 32-bit mode, and whether legacy mappings are to be preserved. Any system booting in true 32-bit mode will not care about legacy mappings, so these are roughly decoupled. Regardless of the entry point, PMB and 32BIT are directly related as far as the kernel is concerned, so we also switch back to having one select the other. With legacy mappings iterated through and applied in the initialization path it's now possible to finally merge the two implementations and permit dynamic remapping overtop of remaining entries regardless of whether boot mappings are crafted by hand or inherited from the boot loader. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/Kconfig')
-rw-r--r--arch/sh/mm/Kconfig24
1 files changed, 5 insertions, 19 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 358c860aeb9..860cd24b420 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -80,30 +80,18 @@ config 32BIT
bool
default y if CPU_SH5
-config PMB_ENABLE
- bool "Support 32-bit physical addressing through PMB"
- depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
- help
- If you say Y here, physical addressing will be extended to
- 32-bits through the SH-4A PMB. If this is not set, legacy
- 29-bit physical addressing will be used.
-
-choice
- prompt "PMB handling type"
- depends on PMB_ENABLE
- default PMB_FIXED
-
config PMB
- bool "PMB"
+ bool "Support 32-bit physical addressing through PMB"
depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
+ select 32BIT
help
If you say Y here, physical addressing will be extended to
32-bits through the SH-4A PMB. If this is not set, legacy
29-bit physical addressing will be used.
-config PMB_FIXED
- bool "fixed PMB"
- depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
+config PMB_LEGACY
+ bool "Support legacy boot mappings for PMB"
+ depends on PMB
select 32BIT
help
If this option is enabled, fixed PMB mappings are inherited
@@ -111,8 +99,6 @@ config PMB_FIXED
management. This is the closest to legacy 29-bit physical mode,
and allows systems to support up to 512MiB of system memory.
-endchoice
-
config X2TLB
bool "Enable extended TLB mode"
depends on (CPU_SHX2 || CPU_SHX3) && MMU && EXPERIMENTAL