1c2f7d14d8
Currently most platforms define pmd_pgtable() as pmd_page() duplicating the same code all over. Instead just define a default value i.e pmd_page() for pmd_pgtable() and let platforms override when required via <asm/pgtable.h>. All the existing platform that override pmd_pgtable() have been moved into their respective <asm/pgtable.h> header in order to precede before the new generic definition. This makes it much cleaner with reduced code. Link: https://lkml.kernel.org/r/1623646133-20306-1-git-send-email-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Nick Hu <nickhu@andestech.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Brian Cain <bcain@codeaurora.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michal Simek <monstr@monstr.eu> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Stafford Horne <shorne@gmail.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef __ASM_CSKY_PGALLOC_H
|
|
#define __ASM_CSKY_PGALLOC_H
|
|
|
|
#include <linux/highmem.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/sched.h>
|
|
|
|
#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
|
|
#include <asm-generic/pgalloc.h>
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
|
|
pte_t *pte)
|
|
{
|
|
set_pmd(pmd, __pmd(__pa(pte)));
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
pgtable_t pte)
|
|
{
|
|
set_pmd(pmd, __pmd(__pa(page_address(pte))));
|
|
}
|
|
|
|
extern void pgd_init(unsigned long *p);
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
|
|
{
|
|
pte_t *pte;
|
|
unsigned long i;
|
|
|
|
pte = (pte_t *) __get_free_page(GFP_KERNEL);
|
|
if (!pte)
|
|
return NULL;
|
|
|
|
for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
|
|
(pte + i)->pte_low = _PAGE_GLOBAL;
|
|
|
|
return pte;
|
|
}
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
pgd_t *ret;
|
|
pgd_t *init;
|
|
|
|
ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
|
|
if (ret) {
|
|
init = pgd_offset(&init_mm, 0UL);
|
|
pgd_init((unsigned long *)ret);
|
|
memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
|
|
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
|
|
/* prevent out of order excute */
|
|
smp_mb();
|
|
#ifdef CONFIG_CPU_NEED_TLBSYNC
|
|
dcache_wb_range((unsigned int)ret,
|
|
(unsigned int)(ret + PTRS_PER_PGD));
|
|
#endif
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define __pte_free_tlb(tlb, pte, address) \
|
|
do { \
|
|
pgtable_pte_page_dtor(pte); \
|
|
tlb_remove_page(tlb, pte); \
|
|
} while (0)
|
|
|
|
extern void pagetable_init(void);
|
|
extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
|
|
extern void pre_trap_init(void);
|
|
|
|
#endif /* __ASM_CSKY_PGALLOC_H */
|