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m68k: mm: use pgtable-nopXd instead of 4level-fixup

Browse source 
m68k has two or three levels of page tables and can use appropriate
pgtable-nopXd and folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit
definitions of __PAGETABLE_PxD_FOLDED in m68k with
include/asm-generic/pgtable-nopmd.h for two-level configurations and
with include/asm-generic/pgtable-nopud.h for three-lelve configurations
and adjust page table manipulation macros and functions accordingly.

[akpm@linux-foundation.org: fix merge glitch]
[geert@linux-m68k.org: more merge glitch fixes]
[akpm@linux-foundation.org: s/bad_pgd/bad_pud/, per Mike]
Link: http://lkml.kernel.org/r/1572938135-31886-6-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Peter Rosin <peda@axentia.se>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Sam Creasey <sammy@sammy.net>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2019-12-04 16:53:59 -08:00 • committed by Linus Torvalds
parent f6f7caeb58
commit 60e50f34b1
15 changed files with 129 additions and 92 deletions
Download patch file Download diff file Expand all files Collapse all files

28
arch/m68k/include/asm/mcf_pgtable.h
View file

@ -198,17 +198,9 @@ static inline int pmd_bad2(pmd_t *pmd) { return 0; }
#define pmd_present(pmd) (!pmd_none2(&(pmd)))
static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; }
static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
static inline int pgd_present(pgd_t pgd) { return 1; }
static inline void pgd_clear(pgd_t *pgdp) {}
#define pte_ERROR(e) \
printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \
__FILE__, __LINE__, pte_val(e))
#define pmd_ERROR(e) \
printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \
__FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
__FILE__, __LINE__, pgd_val(e))
@ -339,14 +331,6 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD];
*/
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
/*
* Find an entry in the second-level pagetable.
*/
static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address)
{
return (pmd_t *) pgd;
}
/*
* Find an entry in the third-level pagetable.
*/
@ -360,12 +344,16 @@ static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address)
static inline void nocache_page(void *vaddr)
{
pgd_t *dir;
p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
unsigned long addr = (unsigned long) vaddr;
dir = pgd_offset_k(addr);
pmdp = pmd_offset(dir, 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);
}
@ -376,12 +364,16 @@ static inline void nocache_page(void *vaddr)
static inline void cache_page(void *vaddr)
{
pgd_t *dir;
p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
unsigned long addr = (unsigned long) vaddr;
dir = pgd_offset_k(addr);
pmdp = pmd_offset(dir, 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);
}