Commit 5f8c9908 authored by Paul Mundt's avatar Paul Mundt Committed by Paul Mundt
Browse files

sh: generic quicklist support.



This moves SH over to the generic quicklists. As per x86_64,
we have special mappings for the PGDs, so these go on their
own list..
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 36f021b5
......@@ -18,6 +18,7 @@
#include <asm/kdebug.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
#include <asm/ubc.h>
static int hlt_counter;
......@@ -64,6 +65,7 @@ void cpu_idle(void)
preempt_enable_no_resched();
schedule();
preempt_disable();
check_pgt_cache();
}
}
......
......@@ -218,6 +218,9 @@ endmenu
menu "Memory management options"
config QUICKLIST
def_bool y
config MMU
bool "Support for memory management hardware"
depends on !CPU_SH2
......
......@@ -67,6 +67,8 @@ void show_mem(void)
printk("%d slab pages\n", slab);
printk("%d pages shared\n", shared);
printk("%d pages swap cached\n", cached);
printk(KERN_INFO "Total of %ld pages in page table cache\n",
quicklist_total_size());
}
#ifdef CONFIG_MMU
......
#ifndef __ASM_SH_PGALLOC_H
#define __ASM_SH_PGALLOC_H
#include <linux/quicklist.h>
#include <asm/page.h>
#define QUICK_PGD 0 /* We preserve special mappings over free */
#define QUICK_PT 1 /* Other page table pages that are zero on free */
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
pte_t *pte)
{
......@@ -13,48 +19,49 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
static inline void pgd_ctor(void *x)
{
pgd_t *pgd = x;
memcpy(pgd + USER_PTRS_PER_PGD,
swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
/*
* Allocate and free page tables.
*/
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT);
if (pgd) {
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
memcpy(pgd + USER_PTRS_PER_PGD,
swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
return pgd;
return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
}
static inline void pgd_free(pgd_t *pgd)
{
free_page((unsigned long)pgd);
quicklist_free(QUICK_PGD, NULL, pgd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
return alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
return pg ? virt_to_page(pg) : NULL;
}
static inline void pte_free_kernel(pte_t *pte)
{
free_page((unsigned long)pte);
quicklist_free(QUICK_PT, NULL, pte);
}
static inline void pte_free(struct page *pte)
{
__free_page(pte);
quicklist_free_page(QUICK_PT, NULL, pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
......@@ -66,6 +73,11 @@ static inline void pte_free(struct page *pte)
#define pmd_free(x) do { } while (0)
#define __pmd_free_tlb(tlb,x) do { } while (0)
#define check_pgt_cache() do { } while (0)
static inline void check_pgt_cache(void)
{
quicklist_trim(QUICK_PGD, NULL, 25, 16);
quicklist_trim(QUICK_PT, NULL, 25, 16);
}
#endif /* __ASM_SH_PGALLOC_H */
......@@ -166,5 +166,5 @@ config ZONE_DMA_FLAG
config NR_QUICK
int
depends on QUICKLIST
default "2" if SUPERH
default "1"
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment