[PATCH 15/17] 4level support for sparc

From: Andreas Kleen
Date: Mon Oct 25 2004 - 03:07:32 EST

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4level support for sparc

sparc32 converted, not compiled.

Signed-off-by: Andi Kleen <ak@xxxxxxx>

diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/fault.c linux-2.6.10rc1-4level/arch/sparc/mm/fault.c
--- linux-2.6.10rc1/arch/sparc/mm/fault.c 2004-08-15 19:45:13.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/fault.c 2004-10-25 04:48:09.000000000 +0200
@@ -148,8 +148,8 @@ static void unhandled_fault(unsigned lon
printk(KERN_ALERT "tsk->{mm,active_mm}->context = %08lx\n",
(tsk->mm ? tsk->mm->context : tsk->active_mm->context));
printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %08lx\n",
- (tsk->mm ? (unsigned long) tsk->mm->pgd :
- (unsigned long) tsk->active_mm->pgd));
+ (tsk->mm ? (unsigned long) tsk->mm->pml4 :
+ (unsigned long) tsk->active_mm->pml4));
die_if_kernel("Oops", regs);
}

@@ -396,8 +396,8 @@ vmalloc_fault:
pgd_t *pgd, *pgd_k;
pmd_t *pmd, *pmd_k;

- pgd = tsk->active_mm->pgd + offset;
- pgd_k = init_mm.pgd + offset;
+ pgd = (pgd_t *)(tsk->active_mm->pml4) + offset;
+ pgd_k = (pgd_t *)(init_mm.pml4) + offset;

if (!pgd_present(*pgd)) {
if (!pgd_present(*pgd_k))
@@ -446,7 +446,7 @@ asmlinkage void do_sun4c_fault(struct pt
BUG(); /* P3 Oops already, you bitch */
}

- pgdp = pgd_offset(mm, address);
+ pgdp = pml4_pgd_offset(pml4_offset(mm, address), address);
ptep = sun4c_pte_offset_kernel((pmd_t *) pgdp, address);

if (pgd_val(*pgdp)) {
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/generic.c linux-2.6.10rc1-4level/arch/sparc/mm/generic.c
--- linux-2.6.10rc1/arch/sparc/mm/generic.c 2004-10-25 04:47:14.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/generic.c 2004-10-25 04:48:09.000000000 +0200
@@ -98,7 +98,7 @@ int io_remap_page_range(struct vm_area_s

prot = __pgprot(pg_iobits);
offset -= from;
- dir = pgd_offset(mm, from);
+ dir = pml4_pgd_offset(pml4_offset(mm, from), from);
flush_cache_range(vma, beg, end);

spin_lock(&mm->page_table_lock);
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/init.c linux-2.6.10rc1-4level/arch/sparc/mm/init.c
--- linux-2.6.10rc1/arch/sparc/mm/init.c 2004-08-15 19:45:13.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/init.c 2004-10-25 04:48:09.000000000 +0200
@@ -63,7 +63,7 @@ EXPORT_SYMBOL(kmap_prot);
EXPORT_SYMBOL(kmap_pte);

#define kmap_get_fixmap_pte(vaddr) \
- pte_offset_kernel(pmd_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr))
+ pte_offset_kernel(pmd_offset(pml4_pgd_offset_k(pml4_offset_k(vaddr), vaddr), (vaddr)), (vaddr))

void __init kmap_init(void)
{
@@ -518,3 +518,8 @@ void sparc_flush_page_to_ram(struct page
if (vaddr)
__flush_page_to_ram(vaddr);
}
+
+pgd_t *__pgd_alloc(struct mm_struct *mm, pml4_t *pml4, unsigned long addr)
+{
+ return get_pgd_fast();
+}
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/io-unit.c linux-2.6.10rc1-4level/arch/sparc/mm/io-unit.c
--- linux-2.6.10rc1/arch/sparc/mm/io-unit.c 2004-10-25 04:47:14.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/io-unit.c 2004-10-25 04:48:09.000000000 +0200
@@ -196,7 +196,7 @@ static int iounit_map_dma_area(dma_addr_
pte_t *ptep;
long i;

- pgdp = pgd_offset(init_task.mm, addr);
+ pgdp = pml4_pgd_offset(pml4_offset(init_task.mm, addr), addr);
pmdp = pmd_offset(pgdp, addr);
ptep = pte_offset_map(pmdp, addr);

diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/iommu.c linux-2.6.10rc1-4level/arch/sparc/mm/iommu.c
--- linux-2.6.10rc1/arch/sparc/mm/iommu.c 2004-08-15 19:45:13.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/iommu.c 2004-10-25 04:48:09.000000000 +0200
@@ -348,7 +348,7 @@ static int iommu_map_dma_area(dma_addr_t
else
__flush_page_to_ram(page);

- pgdp = pgd_offset(&init_mm, addr);
+ pgdp = pml4_pgd_offset(pml4_offset(&init_mm,addr),addr);
pmdp = pmd_offset(pgdp, addr);
ptep = pte_offset_map(pmdp, addr);

diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/srmmu.c linux-2.6.10rc1-4level/arch/sparc/mm/srmmu.c
--- linux-2.6.10rc1/arch/sparc/mm/srmmu.c 2004-10-19 01:55:07.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/srmmu.c 2004-10-25 04:48:09.000000000 +0200
@@ -257,7 +257,7 @@ static inline pte_t srmmu_pte_modify(pte

/* to find an entry in a top-level page table... */
extern inline pgd_t *srmmu_pgd_offset(struct mm_struct * mm, unsigned long address)
-{ return mm->pgd + (address >> SRMMU_PGDIR_SHIFT); }
+{ return (pgd_t *)(mm->pml4) + (address >> SRMMU_PGDIR_SHIFT); }

/* Find an entry in the second-level page table.. */
static inline pmd_t *srmmu_pmd_offset(pgd_t * dir, unsigned long address)
@@ -419,7 +419,7 @@ void srmmu_nocache_init(void)

srmmu_swapper_pg_dir = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
memset(__nocache_fix(srmmu_swapper_pg_dir), 0, SRMMU_PGD_TABLE_SIZE);
- init_mm.pgd = srmmu_swapper_pg_dir;
+ init_mm.pml4 = (pgd_t *)srmmu_swapper_pg_dir;

srmmu_early_allocate_ptable_skeleton(SRMMU_NOCACHE_VADDR, srmmu_nocache_end);

@@ -427,7 +427,7 @@ void srmmu_nocache_init(void)
vaddr = SRMMU_NOCACHE_VADDR;

while (vaddr < srmmu_nocache_end) {
- pgd = pgd_offset_k(vaddr);
+ pgd = pml4_pgd_offset_k(pml4_offset_k(vaddr), vaddr);
pmd = srmmu_pmd_offset(__nocache_fix(pgd), vaddr);
pte = srmmu_pte_offset(__nocache_fix(pmd), vaddr);

@@ -452,7 +452,7 @@ static inline pgd_t *srmmu_get_pgd_fast(

pgd = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
if (pgd) {
- pgd_t *init = pgd_offset_k(0);
+ pgd_t *init = pml4_pgd_offset_k(pml4_offset_k(0), 0);
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
memcpy(pgd + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
@@ -562,7 +562,8 @@ static void srmmu_switch_mm(struct mm_st
spin_lock(&srmmu_context_spinlock);
alloc_context(old_mm, mm);
spin_unlock(&srmmu_context_spinlock);
- srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
+ srmmu_ctxd_set(&srmmu_context_table[mm->context],
+ (pgd_t *)mm->pml4);
}

if (is_hypersparc)
@@ -581,7 +582,7 @@ static inline void srmmu_mapioaddr(unsig
unsigned long tmp;

physaddr &= PAGE_MASK;
- pgdp = pgd_offset_k(virt_addr);
+ pgdp = pml4_pgd_offset_k(pml4_offset_k(virt_addr), virt_addr);
pmdp = srmmu_pmd_offset(pgdp, virt_addr);
ptep = srmmu_pte_offset(pmdp, virt_addr);
tmp = (physaddr >> 4) | SRMMU_ET_PTE;
@@ -615,7 +616,7 @@ static inline void srmmu_unmapioaddr(uns
pmd_t *pmdp;
pte_t *ptep;

- pgdp = pgd_offset_k(virt_addr);
+ pgdp = pml4_pgd_offset_k(pml4_offset_k(virt_addr), virt_addr);
pmdp = srmmu_pmd_offset(pgdp, virt_addr);
ptep = srmmu_pte_offset(pmdp, virt_addr);

@@ -1056,7 +1057,7 @@ void __init srmmu_early_allocate_ptable_
pte_t *ptep;

while(start < end) {
- pgdp = pgd_offset_k(start);
+ pgdp = pml4_pgd_offset_k(pml4_offset_k(start), start);
if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
pmdp = (pmd_t *) __srmmu_get_nocache(
SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
@@ -1086,7 +1087,7 @@ void __init srmmu_allocate_ptable_skelet
pte_t *ptep;

while(start < end) {
- pgdp = pgd_offset_k(start);
+ pgdp = pml4_pgd_offset_k(pml4_offset_k(start), start);
if(srmmu_pgd_none(*pgdp)) {
pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
if (pmdp == NULL)
@@ -1146,7 +1147,7 @@ void __init srmmu_inherit_prom_mappings(
what = 2;
}

- pgdp = pgd_offset_k(start);
+ pgdp = pml4_pgd_offset_k(pml4_offset_k(start), start);
if(what == 2) {
*(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
start += SRMMU_PGDIR_SIZE;
@@ -1191,7 +1192,7 @@ void __init srmmu_inherit_prom_mappings(
/* Create a third-level SRMMU 16MB page mapping. */
static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base)
{
- pgd_t *pgdp = pgd_offset_k(vaddr);
+ pgd_t *pgdp = pml4_pgd_offset_k(pml4_offset_k(vaddr), vaddr);
unsigned long big_pte;

big_pte = KERNEL_PTE(phys_base >> 4);
@@ -1311,7 +1312,7 @@ void __init srmmu_paging_init(void)
__fix_to_virt(__end_of_fixed_addresses - 1), FIXADDR_TOP);
srmmu_allocate_ptable_skeleton(PKMAP_BASE, PKMAP_END);

- pgd = pgd_offset_k(PKMAP_BASE);
+ pgd = pml4_pgd_offset_k(pml4_offset_k(PKMAP_BASE), PKMAP_BASE);
pmd = srmmu_pmd_offset(pgd, PKMAP_BASE);
pte = srmmu_pte_offset(pmd, PKMAP_BASE);
pkmap_page_table = pte;
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/sparc/mm/sun4c.c linux-2.6.10rc1-4level/arch/sparc/mm/sun4c.c
--- linux-2.6.10rc1/arch/sparc/mm/sun4c.c 2004-10-19 01:55:07.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/sparc/mm/sun4c.c 2004-10-25 04:48:09.000000000 +0200
@@ -1847,7 +1847,7 @@ static unsigned long sun4c_pgd_page(pgd_
/* to find an entry in a page-table-directory */
static inline pgd_t *sun4c_pgd_offset(struct mm_struct * mm, unsigned long address)
{
- return mm->pgd + (address >> SUN4C_PGDIR_SHIFT);
+ return (pgd_t *)mm->pml4 + (address >> SUN4C_PGDIR_SHIFT);
}

/* Find an entry in the second-level page table.. */
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-sparc/page.h linux-2.6.10rc1-4level/include/asm-sparc/page.h
--- linux-2.6.10rc1/include/asm-sparc/page.h 2004-04-06 13:12:20.000000000 +0200
+++ linux-2.6.10rc1-4level/include/asm-sparc/page.h 2004-10-25 04:48:10.000000000 +0200
@@ -176,6 +176,8 @@ extern unsigned long pfn_base;
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

+#include <asm-generic/nopml4-page.h>
+
#endif /* __KERNEL__ */

#endif /* _SPARC_PAGE_H */
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-sparc/pgalloc.h linux-2.6.10rc1-4level/include/asm-sparc/pgalloc.h
--- linux-2.6.10rc1/include/asm-sparc/pgalloc.h 2004-03-21 21:11:56.000000000 +0100
+++ linux-2.6.10rc1-4level/include/asm-sparc/pgalloc.h 2004-10-25 04:48:10.000000000 +0200
@@ -34,7 +34,6 @@ BTFIXUPDEF_CALL(void, free_pgd_fast, pgd
#define free_pgd_fast(pgd) BTFIXUP_CALL(free_pgd_fast)(pgd)

#define pgd_free(pgd) free_pgd_fast(pgd)
-#define pgd_alloc(mm) get_pgd_fast()

BTFIXUPDEF_CALL(void, pgd_set, pgd_t *, pmd_t *)
#define pgd_set(pgdp,pmdp) BTFIXUP_CALL(pgd_set)(pgdp,pmdp)
@@ -66,4 +65,6 @@ BTFIXUPDEF_CALL(void, pte_free, struct p
#define pte_free(pte) BTFIXUP_CALL(pte_free)(pte)
#define __pte_free_tlb(tlb, pte) pte_free(pte)

+#include <asm-generic/nopml4-pgalloc.h>
+
#endif /* _SPARC_PGALLOC_H */
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-sparc/pgtable.h linux-2.6.10rc1-4level/include/asm-sparc/pgtable.h
--- linux-2.6.10rc1/include/asm-sparc/pgtable.h 2004-08-15 19:45:49.000000000 +0200
+++ linux-2.6.10rc1-4level/include/asm-sparc/pgtable.h 2004-10-25 04:48:10.000000000 +0200
@@ -60,7 +60,7 @@ BTFIXUPDEF_INT(page_kernel)
#define PTRS_PER_PTE 1024
#define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd)
#define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd)
-#define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd)
+#define USER_PGDS_IN_LAST_PML4 BTFIXUP_SIMM13(user_ptrs_per_pgd)
#define FIRST_USER_PGD_NR 0
#define PTE_SIZE (PTRS_PER_PTE*4)

@@ -280,12 +280,7 @@ extern __inline__ pte_t pte_modify(pte_t
}

#define pgd_index(address) ((address) >> PGDIR_SHIFT)
-
-/* to find an entry in a page-table-directory */
-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
-
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
+#define pgd_index_k(address) pgd_index(address)

/* Find an entry in the second-level page table.. */
BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long)
@@ -434,6 +429,7 @@ extern int io_remap_page_range(struct vm
unsigned long size, pgprot_t prot, int space);

#include <asm-generic/pgtable.h>
+#include <asm-generic/nopml4-pgtable.h>

#endif /* !(__ASSEMBLY__) */

-
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