FRV: Make NOMMU-mode work with base addresses other than 0xC0000000 [try #2]
authorDavid Howells <dhowells@redhat.com>
Thu, 10 Apr 2008 15:11:00 +0000 (16:11 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 10 Apr 2008 20:41:29 +0000 (13:41 -0700)
Make NOMMU-mode work with base addresses other than 0xC0000000 by:

 (1) Giving the code that sets up the protection registers the right address
     in __sdram_base.  Rather than being hard coded to 0xC0000000, the value
     of __page_offset is obtained from the linker script.

 (2) Eliminate the check in __switch_to() that verifies the current thread
     info is in the 0xCxxxxxxx region.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/frv/kernel/head.inc
arch/frv/kernel/switch_to.S

index d424cd2eb213b205391595b8682b80f190fe49f4..bff66628b99af0d364fb4d09dafe777253581af5 100644 (file)
@@ -46,5 +46,5 @@
 #ifdef CONFIG_MMU
 __sdram_base = 0x00000000              /* base address to which SDRAM relocated */
 #else
-__sdram_base = 0xc0000000              /* base address to which SDRAM relocated */
+__sdram_base = __page_offset           /* base address to which SDRAM relocated */
 #endif
index b5275fa9cd0d16ddc10e2674b96161ad45ec9dd5..b06668670fcc5b79018793db30fd20e504e3fe1d 100644 (file)
@@ -102,13 +102,6 @@ __switch_to:
        movgs           gr14,lr
        bar
 
-       srli            gr15,#28,gr5
-       subicc          gr5,#0xc,gr0,icc0
-       beq             icc0,#0,111f
-       break
-       nop
-111:
-
        # jump to __switch_back or ret_from_fork as appropriate
        # - move prev to GR8
        movgs           gr4,psr