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| author |   LEROY Christophe <christophe.leroy@c-s.fr> | 2013-10-11 14:56:40 +0200 |
|---|---|---|
| committer |   Scott Wood <scottwood@freescale.com> | 2013-10-28 21:11:22 -0500 |
| commit | 5f2da0f1e8fb074482118f04d0db0614951c3bb8 (patch) | |
| tree | d695d9d77c607e17f6ddf784fd869f848bad8df4 /arch/powerpc/mm/init_32.c | |
| parent | powerpc/8xx: Fixing issue with CONFIG_PIN_TLB (diff) | |
| download | linux-dev-5f2da0f1e8fb074482118f04d0db0614951c3bb8.tar.xz linux-dev-5f2da0f1e8fb074482118f04d0db0614951c3bb8.zip | |
powerpc/8xx: Fixing memory init issue with CONFIG_PIN_TLB
Activating CONFIG_PIN_TLB allows access to the 24 first Mbytes of
memory at bootup instead of 8. It is needed for "big" kernels for
instance when activating CONFIG_LOCKDEP_SUPPORT. This needs to be
taken into account in init_32 too, otherwise memory allocation soon
fails after startup.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Acked-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/mm/init_32.c')
| -rw-r--r-- | arch/powerpc/mm/init_32.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index d47d3dab4870..cff59f1bec23 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -213,7 +213,12 @@ void setup_initial_memory_limit(phys_addr_t first_memblock_base, */ BUG_ON(first_memblock_base != 0); +#ifdef CONFIG_PIN_TLB + /* 8xx can only access 24MB at the moment */ + memblock_set_current_limit(min_t(u64, first_memblock_size, 0x01800000)); +#else /* 8xx can only access 8MB at the moment */ memblock_set_current_limit(min_t(u64, first_memblock_size, 0x00800000)); +#endif } #endif /* CONFIG_8xx */ |