diff options
| author | David Miller <davem@davemloft.net> | 2007-06-06 22:52:35 -0700 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2007-06-11 11:37:13 -0700 |
| commit | 6e351b1d8533f9ea5dd4feae2386b325b1c3f12a (patch) | |
| tree | 58b9983dec43fd6435f91c57ccbbcfb62a2dff15 /arch/sparc64/kernel/head.S | |
| parent | 6905f0fcedf2a9f44d2690bf029cb1efdc7a9fdb (diff) | |
[PATCH] SPARC64: Fix two bugs wrt. kernel 4MB TSB.
1) The TSB lookup was not using the correct hash mask.
2) It was not aligned on a boundary equal to it's size,
which is required by the sun4v Hypervisor.
wasn't having it's return value checked, and that bug will be fixed up
as well in a subsequent changeset.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Diffstat (limited to 'arch/sparc64/kernel/head.S')
| -rw-r--r-- | arch/sparc64/kernel/head.S | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S index baea10a98196..06459ae20e0f 100644 --- a/arch/sparc64/kernel/head.S +++ b/arch/sparc64/kernel/head.S @@ -653,33 +653,54 @@ setup_tba: restore sparc64_boot_end: -#include "ktlb.S" -#include "tsb.S" #include "etrap.S" #include "rtrap.S" #include "winfixup.S" #include "entry.S" #include "sun4v_tlb_miss.S" #include "sun4v_ivec.S" +#include "ktlb.S" +#include "tsb.S" /* * The following skip makes sure the trap table in ttable.S is aligned * on a 32K boundary as required by the v9 specs for TBA register. * * We align to a 32K boundary, then we have the 32K kernel TSB, - * then the 32K aligned trap table. + * the 64K kernel 4MB TSB, and then the 32K aligned trap table. */ 1: .skip 0x4000 + _start - 1b +! 0x0000000000408000 + .globl swapper_tsb swapper_tsb: .skip (32 * 1024) -! 0x0000000000408000 + .globl swapper_4m_tsb +swapper_4m_tsb: + .skip (64 * 1024) + +! 0x0000000000420000 + /* Some care needs to be exercised if you try to move the + * location of the trap table relative to other things. For + * one thing there are br* instructions in some of the + * trap table entires which branch back to code in ktlb.S + * Those instructions can only handle a signed 16-bit + * displacement. + * + * There is a binutils bug (bugzilla #4558) which causes + * the relocation overflow checks for such instructions to + * not be done correctly. So bintuils will not notice the + * error and will instead write junk into the relocation and + * you'll have an unbootable kernel. + */ #include "ttable.S" +! 0x0000000000428000 + #include "systbls.S" .data |