mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
3f407976ac
Change the 'pgtable_t' type for sparc32 so that it represents the uncached virtual address of the PTE table, rather than the underlying 'struct page'. This allows us to free page table allocations smaller than a page. Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _SPARC_PGALLOC_H
|
|
#define _SPARC_PGALLOC_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
|
|
#include <asm/pgtsrmmu.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/vaddrs.h>
|
|
#include <asm/page.h>
|
|
|
|
struct page;
|
|
|
|
void *srmmu_get_nocache(int size, int align);
|
|
void srmmu_free_nocache(void *addr, int size);
|
|
|
|
extern struct resource sparc_iomap;
|
|
|
|
pgd_t *get_pgd_fast(void);
|
|
static inline void free_pgd_fast(pgd_t *pgd)
|
|
{
|
|
srmmu_free_nocache(pgd, SRMMU_PGD_TABLE_SIZE);
|
|
}
|
|
|
|
#define pgd_free(mm, pgd) free_pgd_fast(pgd)
|
|
#define pgd_alloc(mm) get_pgd_fast()
|
|
|
|
static inline void pud_set(pud_t * pudp, pmd_t * pmdp)
|
|
{
|
|
unsigned long pa = __nocache_pa(pmdp);
|
|
|
|
set_pte((pte_t *)pudp, __pte((SRMMU_ET_PTD | (pa >> 4))));
|
|
}
|
|
|
|
#define pud_populate(MM, PGD, PMD) pud_set(PGD, PMD)
|
|
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm,
|
|
unsigned long address)
|
|
{
|
|
return srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE,
|
|
SRMMU_PMD_TABLE_SIZE);
|
|
}
|
|
|
|
static inline void free_pmd_fast(pmd_t * pmd)
|
|
{
|
|
srmmu_free_nocache(pmd, SRMMU_PMD_TABLE_SIZE);
|
|
}
|
|
|
|
#define pmd_free(mm, pmd) free_pmd_fast(pmd)
|
|
#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
|
|
|
|
#define pmd_populate(mm, pmd, pte) pmd_set(pmd, pte)
|
|
#define pmd_pgtable(pmd) (pgtable_t)__pmd_page(pmd)
|
|
|
|
void pmd_set(pmd_t *pmdp, pte_t *ptep);
|
|
#define pmd_populate_kernel pmd_populate
|
|
|
|
pgtable_t pte_alloc_one(struct mm_struct *mm);
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
|
|
{
|
|
return srmmu_get_nocache(SRMMU_PTE_TABLE_SIZE,
|
|
SRMMU_PTE_TABLE_SIZE);
|
|
}
|
|
|
|
|
|
static inline void free_pte_fast(pte_t *pte)
|
|
{
|
|
srmmu_free_nocache(pte, SRMMU_PTE_TABLE_SIZE);
|
|
}
|
|
|
|
#define pte_free_kernel(mm, pte) free_pte_fast(pte)
|
|
|
|
void pte_free(struct mm_struct * mm, pgtable_t pte);
|
|
#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
|
|
|
|
#endif /* _SPARC_PGALLOC_H */
|