diff options
| author |   Stuart Menefy <stuart.menefy@st.com> | 2007-11-30 17:06:36 +0900 |
|---|---|---|
| committer |   Paul Mundt <lethal@linux-sh.org> | 2008-01-28 13:18:59 +0900 |
| commit | cbaa118ecfd99fc5ed7adbd9c34a30e1c05e3c93 (patch) | |
| tree | e60db5c0f3573558c97f39cfab78732220a72e6d /arch/sh/mm/pmb.c | |
| parent | sh: Explicit alignment for PAGE_SIZE in copy/clear_page(). (diff) | |
| download | linux-dev-cbaa118ecfd99fc5ed7adbd9c34a30e1c05e3c93.tar.xz linux-dev-cbaa118ecfd99fc5ed7adbd9c34a30e1c05e3c93.zip | |
sh: Preparation for uncached jumps through PMB.
Presently most of the 29-bit physical parts do P1/P2 segmentation
with a 1:1 cached/uncached mapping, jumping between the two to
control the caching behaviour. This provides the basic infrastructure
to maintain this behaviour on 32-bit physical parts that don't map
P1/P2 at all, using a shiny new linker section and corresponding
fixmap entry.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/pmb.c')
| -rw-r--r-- | arch/sh/mm/pmb.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index ef6ab39eaf65..ab81c602295f 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -163,18 +163,18 @@ repeat: return 0; } -int set_pmb_entry(struct pmb_entry *pmbe) +int __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe) { int ret; - jump_to_P2(); + jump_to_uncached(); ret = __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, &pmbe->entry); - back_to_P1(); + back_to_cached(); return ret; } -void clear_pmb_entry(struct pmb_entry *pmbe) +void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe) { unsigned int entry = pmbe->entry; unsigned long addr; @@ -188,7 +188,7 @@ void clear_pmb_entry(struct pmb_entry *pmbe) entry >= NR_PMB_ENTRIES)) return; - jump_to_P2(); + jump_to_uncached(); /* Clear V-bit */ addr = mk_pmb_addr(entry); @@ -197,7 +197,7 @@ void clear_pmb_entry(struct pmb_entry *pmbe) addr = mk_pmb_data(entry); ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr); - back_to_P1(); + back_to_cached(); clear_bit(entry, &pmb_map); } @@ -302,7 +302,7 @@ static void pmb_cache_ctor(struct kmem_cache *cachep, void *pmb) pmbe->entry = PMB_NO_ENTRY; } -static int __init pmb_init(void) +static int __uses_jump_to_uncached pmb_init(void) { unsigned int nr_entries = ARRAY_SIZE(pmb_init_map); unsigned int entry, i; @@ -312,7 +312,7 @@ static int __init pmb_init(void) pmb_cache = kmem_cache_create("pmb", sizeof(struct pmb_entry), 0, SLAB_PANIC, pmb_cache_ctor); - jump_to_P2(); + jump_to_uncached(); /* * Ordering is important, P2 must be mapped in the PMB before we @@ -335,7 +335,7 @@ static int __init pmb_init(void) i |= MMUCR_TI; ctrl_outl(i, MMUCR); - back_to_P1(); + back_to_cached(); return 0; } |