sh: early cached_to_uncached initialization.
statically initialise the cached_to_uncached offset, so that we can use
it immediatly.
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/system_32.h b/arch/sh/include/asm/system_32.h
index 16509ed..f7f1056 100644
--- a/arch/sh/include/asm/system_32.h
+++ b/arch/sh/include/asm/system_32.h
@@ -58,7 +58,8 @@
last = __last; \
} while (0)
-#define __uses_jump_to_uncached __attribute__ ((__section__ (".uncached.text")))
+#define __uses_jump_to_uncached \
+ noinline __attribute__ ((__section__ (".uncached.text")))
/*
* Jump to uncached area.
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index d4681a5..f1a4942 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -23,7 +23,19 @@
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD];
-unsigned long cached_to_uncached = 0;
+
+#ifdef CONFIG_SUPERH32
+/*
+ * Handle trivial transitions between cached and uncached
+ * segments, making use of the 1:1 mapping relationship in
+ * 512MB lowmem.
+ *
+ * This is the offset of the uncached section from its cached alias.
+ * Default value only valid in 29 bit mode, in 32bit mode will be
+ * overridden in pmb_init.
+ */
+unsigned long cached_to_uncached = P2SEG - P1SEG;
+#endif
#ifdef CONFIG_MMU
static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
@@ -58,9 +70,7 @@
}
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
-
- if (cached_to_uncached)
- flush_tlb_one(get_asid(), addr);
+ flush_tlb_one(get_asid(), addr);
}
/*
@@ -165,15 +175,6 @@
#ifdef CONFIG_SUPERH32
/* Set up the uncached fixmap */
set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
-
-#ifdef CONFIG_29BIT
- /*
- * Handle trivial transitions between cached and uncached
- * segments, making use of the 1:1 mapping relationship in
- * 512MB lowmem.
- */
- cached_to_uncached = P2SEG - P1SEG;
-#endif
#endif
}