Tried out the pre-patch-2.2.5-rmk5 (and rmk4) this morning with
diff-2.2.5-rmk4-np6 on my SA1100 board and am seeing the sa1100fb.c code
crash on startup. The driver remaps a region of cacheable, bufferable RAM
to 0xD1000000 as non-cached, non-bufferable. The remap_page_range returns
successfully (0). However, as soon as I read from or write to the mapped
memory region, I receive an Oops. This is working under 2.2.3 kernel. The
remap_page_range call I am using is below along with the Oops.
remap_page_range(0xD1000000, 0xc0104000, 0x4D000,
__pgprot(PTE_TYPE_SMALL | PTE_AP_WRITE))
Unable to handle kernel paging request at virtual address d1000000
memmap = C0004000, pgd = c0004000
*pgd = c8fdb001, *pmd = c8fdb001, *pte = c0104ff2, *ppte = 00000000
Internal error: Oops: 2
CPU: 0
pc : [<c00a914c>] lr : [<c00a9144>]
sp : c01bdf40 ip : c01bdef8 fp : c01bdf58
r10: c00081fc r9 : 4401a118 r8 : c00e98ec
r7 : c0162488 r6 : c00de824 r5 : fffff000 r4 : d1000000
r3 : 60000053 r2 : 0000b928 r1 : 00000418 r0 : c00de910
Flags: Nzcv IRQs on FIQs off Mode SVC_32 Segment kernel
Control: C000517F Table: C000517F DAC: 0000001D
Process swapper (pid: 1, stackpage=c01bd000)
Stack:
c01bdf20: c00a9144 c00a914c 80000053
fffff
c01bdf40: c0151c2c 00000000 c000b450 c01bdf78 c01bdf5c c00a9744 c00a904c
c00de
c01bdf60: 00000000 00000000 c000b450 c01bdf94 c01bdf7c c00a7bcc c00a96e4
c000c
c01bdf80: c00e96d0 c0152580 c01bdfa4 c01bdf98 c0096900 c00a7b38 c01bdfb4
c01bd
c01bdfa0: c00884e0 c00968d8 c01bdfd4 c01bdfb8 c0031170 c00884dc c000c8b0
c00e9
c01bdfc0: c0152580 c0162488 c01bdfe4 c01bdfd8 c000c88c c003116c c01bdffc
c01bd
c01bdfe0: c000c8c0 c000c840 c000c8b0 c00e96d0 c00e7fe0 c01be000 c000e380
c000c
Any ideas whats going on?
Thanks,
Eric
--------------------------------------------------------------
Eric Thomas Ericsson Inc.
Software Engineer 7001 Development Drive
[EMAIL PROTECTED] Research Triangle Park, NC 27709
Voice: (919)472-7082 FAX: (919)472-1561
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