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sparc32: use pgtable-nopud instead of 4level-fixup

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32-bit version of sparc has three-level page tables and can use
pgtable-nopud and folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h with
include/asm-generic/pgtable-nopud.h and adjust page table manipulation
macros and functions accordingly.

Link: http://lkml.kernel.org/r/1572938135-31886-11-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Tested-by: Anatoly Pugachev <matorola@gmail.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
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 16:54:20 -08:00
committed by Linus Torvalds
parent 2fa245c1f8
commit 7235db268a
7 changed files with 81 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/sparc/include/asm/pgalloc_32.h
View File

@@ -26,14 +26,14 @@ static inline void free_pgd_fast(pgd_t *pgd)
#define pgd_free(mm, pgd) free_pgd_fast(pgd)
#define pgd_alloc(mm) get_pgd_fast()
static inline void pgd_set(pgd_t * pgdp, pmd_t * pmdp)
static inline void pud_set(pud_t * pudp, pmd_t * pmdp)
{
unsigned long pa = __nocache_pa(pmdp);
set_pte((pte_t *)pgdp, __pte((SRMMU_ET_PTD | (pa >> 4))));
set_pte((pte_t *)pudp, __pte((SRMMU_ET_PTD | (pa >> 4))));
}
#define pgd_populate(MM, PGD, PMD) pgd_set(PGD, PMD)
#define pud_populate(MM, PGD, PMD) pud_set(PGD, PMD)
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm,
unsigned long address)

28
arch/sparc/include/asm/pgtable_32.h
View File

@@ -12,7 +12,7 @@
#include <linux/const.h>
#ifndef __ASSEMBLY__
#include <asm-generic/4level-fixup.h>
#include <asm-generic/pgtable-nopud.h>
#include <linux/spinlock.h>
#include <linux/mm_types.h>
@@ -132,12 +132,12 @@ static inline struct page *pmd_page(pmd_t pmd)
return pfn_to_page((pmd_val(pmd) & SRMMU_PTD_PMASK) >> (PAGE_SHIFT-4));
}
static inline unsigned long pgd_page_vaddr(pgd_t pgd)
static inline unsigned long pud_page_vaddr(pud_t pud)
{
if (srmmu_device_memory(pgd_val(pgd))) {
if (srmmu_device_memory(pud_val(pud))) {
return ~0;
} else {
unsigned long v = pgd_val(pgd) & SRMMU_PTD_PMASK;
unsigned long v = pud_val(pud) & SRMMU_PTD_PMASK;
return (unsigned long)__nocache_va(v << 4);
}
}
@@ -184,24 +184,24 @@ static inline void pmd_clear(pmd_t *pmdp)
set_pte((pte_t *)&pmdp->pmdv[i], __pte(0));
}
static inline int pgd_none(pgd_t pgd)
static inline int pud_none(pud_t pud)
{
return !(pgd_val(pgd) & 0xFFFFFFF);
return !(pud_val(pud) & 0xFFFFFFF);
}
static inline int pgd_bad(pgd_t pgd)
static inline int pud_bad(pud_t pud)
{
return (pgd_val(pgd) & SRMMU_ET_MASK) != SRMMU_ET_PTD;
return (pud_val(pud) & SRMMU_ET_MASK) != SRMMU_ET_PTD;
}
static inline int pgd_present(pgd_t pgd)
static inline int pud_present(pud_t pud)
{
return ((pgd_val(pgd) & SRMMU_ET_MASK) == SRMMU_ET_PTD);
return ((pud_val(pud) & SRMMU_ET_MASK) == SRMMU_ET_PTD);
}
static inline void pgd_clear(pgd_t *pgdp)
static inline void pud_clear(pud_t *pudp)
{
set_pte((pte_t *)pgdp, __pte(0));
set_pte((pte_t *)pudp, __pte(0));
}
/*
@@ -319,9 +319,9 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
/* Find an entry in the second-level page table.. */
static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address)
static inline pmd_t *pmd_offset(pud_t * dir, unsigned long address)
{
return (pmd_t *) pgd_page_vaddr(*dir) +
return (pmd_t *) pud_page_vaddr(*dir) +
((address >> PMD_SHIFT) & (PTRS_PER_PMD - 1));
}