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FRV: permit the memory to be located elsewhere in NOMMU mode

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Permit the memory to be located somewhere other than address 0xC0000000 in
NOMMU mode.  The configuration options are already present, it just
requires wiring up in the linker script.

Note that only a limited set of locations of runtime addresses are available
because of the way the CPU protection registers work.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2008-02-04 22:29:53 -08:00 committed by Linus Torvalds
parent e114e47377
commit 7038220aa5
2 changed files with 10 additions and 1 deletions
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9
arch/frv/Kconfig
View File

@ -138,6 +138,15 @@ config UCPAGE_OFFSET_C0000000
endchoice
config PAGE_OFFSET
hex
default 0x20000000 if UCPAGE_OFFSET_20000000
default 0x40000000 if UCPAGE_OFFSET_40000000
default 0x60000000 if UCPAGE_OFFSET_60000000
default 0x80000000 if UCPAGE_OFFSET_80000000
default 0xA0000000 if UCPAGE_OFFSET_A0000000
default 0xC0000000
config PROTECT_KERNEL
bool "Protect core kernel against userspace"
depends on !MMU

2
arch/frv/kernel/vmlinux.lds.S
View File

@ -13,7 +13,7 @@ ENTRY(_start)
jiffies = jiffies_64 + 4;
__page_offset = 0xc0000000; /* start of area covered by struct pages */
__page_offset = CONFIG_PAGE_OFFSET; /* start of area covered by struct pages */
__kernel_image_start = __page_offset; /* address at which kernel image resides */
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