m68k/mm: move {cache,nocahe}_page() definitions close to their user

The cache_page() and nocache_page() functions are only used by the
motorola MMU variant for setting caching attributes for the page table
pages.

Move the definitions of these functions from
arch/m68k/include/asm/motorola_pgtable.h closer to their usage in
arch/m68k/mm/motorola.c and drop unused definition in
arch/m68k/include/asm/mcf_pgtable.h.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-7-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 904c2a663977..8e5e74121a78 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -45,6 +45,49 @@ unsigned long mm_cachebits;
 EXPORT_SYMBOL(mm_cachebits);
 #endif
 
+/* Prior to calling these routines, the page should have been flushed
+ * from both the cache and ATC, or the CPU might not notice that the
+ * cache setting for the page has been changed. -jskov
+ */
+static inline void nocache_page(void *vaddr)
+{
+	unsigned long addr = (unsigned long)vaddr;
+
+	if (CPU_IS_040_OR_060) {
+		pgd_t *dir;
+		p4d_t *p4dp;
+		pud_t *pudp;
+		pmd_t *pmdp;
+		pte_t *ptep;
+
+		dir = pgd_offset_k(addr);
+		p4dp = p4d_offset(dir, addr);
+		pudp = pud_offset(p4dp, addr);
+		pmdp = pmd_offset(pudp, addr);
+		ptep = pte_offset_kernel(pmdp, addr);
+		*ptep = pte_mknocache(*ptep);
+	}
+}
+
+static inline void cache_page(void *vaddr)
+{
+	unsigned long addr = (unsigned long)vaddr;
+
+	if (CPU_IS_040_OR_060) {
+		pgd_t *dir;
+		p4d_t *p4dp;
+		pud_t *pudp;
+		pmd_t *pmdp;
+		pte_t *ptep;
+
+		dir = pgd_offset_k(addr);
+		p4dp = p4d_offset(dir, addr);
+		pudp = pud_offset(p4dp, addr);
+		pmdp = pmd_offset(pudp, addr);
+		ptep = pte_offset_kernel(pmdp, addr);
+		*ptep = pte_mkcache(*ptep);
+	}
+}
 
 /*
  * Motorola 680x0 user's manual recommends using uncached memory for address