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yaml
---
r: 34185
b: refs/heads/master
c: 9282ed9
h: refs/heads/master
i:
  34183: e703e25
v: v3
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Gerald Schaefer authored and Martin Schwidefsky committed Sep 20, 2006
1 parent f05a15a commit 191700f
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Showing 4 changed files with 107 additions and 122 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 31b58088292c7f00f0b81088bfb557285b0b6247
refs/heads/master: 9282ed929758b82f448a40d3c17319d794970624
36 changes: 14 additions & 22 deletions trunk/arch/s390/mm/init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,16 +108,23 @@ void __init paging_init(void)
unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;
static const int ssm_mask = 0x04000000L;
unsigned long ro_start_pfn, ro_end_pfn;
unsigned long zones_size[MAX_NR_ZONES];

ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);
ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);

memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_DMA] = max_low_pfn;
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT,
zholes_size);

/* unmap whole virtual address space */

pg_dir = swapper_pg_dir;

for (i=0;i<KERNEL_PGD_PTRS;i++)
pmd_clear((pmd_t*)pg_dir++);
for (i = 0; i < PTRS_PER_PGD; i++)
pmd_clear((pmd_t *) pg_dir++);

/*
* map whole physical memory to virtual memory (identity mapping)
Expand All @@ -131,10 +138,7 @@ void __init paging_init(void)
*/
pg_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);

pg_dir->pgd0 = (_PAGE_TABLE | __pa(pg_table));
pg_dir->pgd1 = (_PAGE_TABLE | (__pa(pg_table)+1024));
pg_dir->pgd2 = (_PAGE_TABLE | (__pa(pg_table)+2048));
pg_dir->pgd3 = (_PAGE_TABLE | (__pa(pg_table)+3072));
pmd_populate_kernel(&init_mm, (pmd_t *) pg_dir, pg_table);
pg_dir++;

for (tmp = 0 ; tmp < PTRS_PER_PTE ; tmp++,pg_table++) {
Expand All @@ -143,8 +147,8 @@ void __init paging_init(void)
else
pte = pfn_pte(pfn, PAGE_KERNEL);
if (pfn >= max_low_pfn)
pte_clear(&init_mm, 0, &pte);
set_pte(pg_table, pte);
pte_val(pte) = _PAGE_TYPE_EMPTY;
set_pte(pg_table, pte);
pfn++;
}
}
Expand All @@ -159,16 +163,6 @@ void __init paging_init(void)
: : "m" (pgdir_k), "m" (ssm_mask));

local_flush_tlb();

{
unsigned long zones_size[MAX_NR_ZONES];

memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_DMA] = max_low_pfn;
free_area_init_node(0, &contig_page_data, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT,
zholes_size);
}
return;
}

Expand Down Expand Up @@ -236,10 +230,8 @@ void __init paging_init(void)
pte = pfn_pte(pfn, __pgprot(_PAGE_RO));
else
pte = pfn_pte(pfn, PAGE_KERNEL);
if (pfn >= max_low_pfn) {
pte_clear(&init_mm, 0, &pte);
continue;
}
if (pfn >= max_low_pfn)
pte_val(pte) = _PAGE_TYPE_EMPTY;
set_pte(pt_dir, pte);
pfn++;
}
Expand Down
67 changes: 34 additions & 33 deletions trunk/include/asm-s390/pgalloc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,16 @@

extern void diag10(unsigned long addr);

/*
* Page allocation orders.
*/
#ifndef __s390x__
# define PGD_ALLOC_ORDER 1
#else /* __s390x__ */
# define PMD_ALLOC_ORDER 2
# define PGD_ALLOC_ORDER 2
#endif /* __s390x__ */

/*
* Allocate and free page tables. The xxx_kernel() versions are
* used to allocate a kernel page table - this turns on ASN bits
Expand All @@ -29,30 +39,23 @@ extern void diag10(unsigned long addr);

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd;
pgd_t *pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER);
int i;

if (!pgd)
return NULL;
for (i = 0; i < PTRS_PER_PGD; i++)
#ifndef __s390x__
pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,1);
if (pgd != NULL)
for (i = 0; i < USER_PTRS_PER_PGD; i++)
pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
#else /* __s390x__ */
pgd = (pgd_t *) __get_free_pages(GFP_KERNEL,2);
if (pgd != NULL)
for (i = 0; i < PTRS_PER_PGD; i++)
pgd_clear(pgd + i);
#endif /* __s390x__ */
pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE));
#else
pgd_clear(pgd + i);
#endif
return pgd;
}

static inline void pgd_free(pgd_t *pgd)
{
#ifndef __s390x__
free_pages((unsigned long) pgd, 1);
#else /* __s390x__ */
free_pages((unsigned long) pgd, 2);
#endif /* __s390x__ */
free_pages((unsigned long) pgd, PGD_ALLOC_ORDER);
}

#ifndef __s390x__
Expand All @@ -68,20 +71,19 @@ static inline void pgd_free(pgd_t *pgd)
#else /* __s390x__ */
static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
{
pmd_t *pmd;
int i;
pmd_t *pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER);
int i;

pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, 2);
if (pmd != NULL) {
for (i=0; i < PTRS_PER_PMD; i++)
pmd_clear(pmd+i);
}
if (!pmd)
return NULL;
for (i=0; i < PTRS_PER_PMD; i++)
pmd_clear(pmd + i);
return pmd;
}

static inline void pmd_free (pmd_t *pmd)
{
free_pages((unsigned long) pmd, 2);
free_pages((unsigned long) pmd, PMD_ALLOC_ORDER);
}

#define __pmd_free_tlb(tlb,pmd) \
Expand Down Expand Up @@ -123,15 +125,14 @@ pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr)
{
pte_t *pte;
int i;

pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
if (pte != NULL) {
for (i=0; i < PTRS_PER_PTE; i++) {
pte_clear(mm, vmaddr, pte+i);
vmaddr += PAGE_SIZE;
}
pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT);
int i;

if (!pte)
return NULL;
for (i=0; i < PTRS_PER_PTE; i++) {
pte_clear(mm, vmaddr, pte + i);
vmaddr += PAGE_SIZE;
}
return pte;
}
Expand Down
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