diff options
| author | Kyle McMartin <kyle@parisc-linux.org> | 2006-06-16 18:20:00 -0400 |
|---|---|---|
| committer | Kyle McMartin <kyle@hera.kernel.org> | 2006-06-27 23:28:42 +0000 |
| commit | a9d2d386c42b816a81eb1d02dfb7b502ba8cea82 (patch) | |
| tree | 0c01caa8a470713dc8a68db0ed584cfe3142392d /arch/parisc/kernel/cache.c | |
| parent | e5a2e7fdb53028ce187c0ce0ae0d45ca7546fd5e (diff) | |
[PARISC] Ensure Space ID hashing is turned off
Check PDC_CACHE to see if spaceid hashing is turned on, and fail to
boot if that is the case.
However, some old machines do not implement the PDC_CACHE_RET_SPID
firmware call, so continue to boot if the call fails because of
PDC_BAD_OPTION (but fail in all other error returns).
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc/kernel/cache.c')
| -rw-r--r-- | arch/parisc/kernel/cache.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 851519cbad6..bc7c4a4e26a 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -236,7 +236,8 @@ parisc_cache_init(void) void disable_sr_hashing(void) { - int srhash_type; + int srhash_type, retval; + unsigned long space_bits; switch (boot_cpu_data.cpu_type) { case pcx: /* We shouldn't get this far. setup.c should prevent it. */ @@ -262,6 +263,13 @@ void disable_sr_hashing(void) } disable_sr_hashing_asm(srhash_type); + + retval = pdc_spaceid_bits(&space_bits); + /* If this procedure isn't implemented, don't panic. */ + if (retval < 0 && retval != PDC_BAD_OPTION) + panic("pdc_spaceid_bits call failed.\n"); + if (space_bits != 0) + panic("SpaceID hashing is still on!\n"); } void flush_dcache_page(struct page *page) |