From: Matt Porter <mporter@kernel.crashing.org>
To: akpm@osdl.org
Cc: paulus@samba.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.linuxppc.org
Subject: [PATCH] PPC32: Fix __flush_dcache_icache_phys() for Book E
Date: Mon, 10 May 2004 17:05:11 -0700 [thread overview]
Message-ID: <20040510170511.A26495@home.com> (raw)
This patch implements/uses __flush_dcache_icache_page() which
kmaps on a Book E part, but keeps the existing behavior on other
PowerPCs which can disable the MMU. Please apply.
-Matt
diff -Nru a/arch/ppc/mm/fault.c b/arch/ppc/mm/fault.c
--- a/arch/ppc/mm/fault.c Mon May 10 15:25:17 2004
+++ b/arch/ppc/mm/fault.c Mon May 10 15:25:17 2004
@@ -227,8 +227,7 @@
struct page *page = pte_page(*ptep);
if (! test_bit(PG_arch_1, &page->flags)) {
- unsigned long phys = page_to_pfn(page) << PAGE_SHIFT;
- __flush_dcache_icache_phys(phys);
+ flush_dcache_icache_page(page);
set_bit(PG_arch_1, &page->flags);
}
pte_update(ptep, 0, _PAGE_HWEXEC);
diff -Nru a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
--- a/arch/ppc/mm/init.c Mon May 10 15:25:17 2004
+++ b/arch/ppc/mm/init.c Mon May 10 15:25:17 2004
@@ -572,6 +572,16 @@
clear_bit(PG_arch_1, &page->flags);
}
+void flush_dcache_icache_page(struct page *page)
+{
+#ifdef CONFIG_BOOKE
+ __flush_dcache_icache(kmap(page));
+ kunmap(page);
+#else
+ __flush_dcache_icache_phys(page_to_pfn(page) << PAGE_SHIFT);
+#endif
+
+}
void clear_user_page(void *page, unsigned long vaddr, struct page *pg)
{
clear_page(page);
@@ -614,7 +624,7 @@
if (vma->vm_mm == current->active_mm)
__flush_dcache_icache((void *) address);
else
- __flush_dcache_icache_phys(pfn << PAGE_SHIFT);
+ flush_dcache_icache_page(page);
set_bit(PG_arch_1, &page->flags);
}
}
diff -Nru a/include/asm-ppc/cacheflush.h b/include/asm-ppc/cacheflush.h
--- a/include/asm-ppc/cacheflush.h Mon May 10 15:25:17 2004
+++ b/include/asm-ppc/cacheflush.h Mon May 10 15:25:17 2004
@@ -41,6 +41,6 @@
extern void __flush_dcache_icache(void *page_va);
extern void __flush_dcache_icache_phys(unsigned long physaddr);
-
+extern void flush_dcache_icache_page(struct page *page);
#endif /* _PPC_CACHEFLUSH_H */
#endif /* __KERNEL__ */
next reply other threads:[~2004-05-11 0:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-11 0:05 Matt Porter [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-05-11 0:30 [PATCH] PPC32: Fix __flush_dcache_icache_phys() for Book E Matt Porter
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