* [PATCH 4/17] 4level support for cris
@ 2004-10-25 7:23 Andreas Kleen
0 siblings, 0 replies; only message in thread
From: Andreas Kleen @ 2004-10-25 7:23 UTC (permalink / raw)
To: torvalds; +Cc: linux-kernel, akpm
4level support for cris
cris works (thanks to Mikael Starvik)
Signed-off-by: Andi Kleen <ak@suse.de>
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/cris/arch-v10/mm/fault.c linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/fault.c
--- linux-2.6.10rc1/arch/cris/arch-v10/mm/fault.c 2004-06-16 12:22:42.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/fault.c 2004-10-25 04:48:09.000000000 +0200
@@ -24,7 +24,7 @@
#define D(x)
#endif
-extern volatile pgd_t *current_pgd;
+extern volatile pml4_t *current_pml4;
extern const struct exception_table_entry
*search_exception_tables(unsigned long addr);
@@ -92,7 +92,7 @@ handle_mmu_bus_fault(struct pt_regs *reg
* refer through current_pgd, dont use mm->pgd
*/
- pmd = (pmd_t *)(current_pgd + pgd_index(address));
+ pmd = (pmd_t *)(current_pml4 + pgd_index(address));
if (pmd_none(*pmd)) {
do_page_fault(address, regs, 0, writeac);
return;
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/cris/arch-v10/mm/init.c linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/init.c
--- linux-2.6.10rc1/arch/cris/arch-v10/mm/init.c 2004-10-19 01:55:00.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/init.c 2004-10-25 04:48:09.000000000 +0200
@@ -37,12 +37,12 @@ paging_init(void)
for(i = 0; i < PTRS_PER_PGD; i++)
swapper_pg_dir[i] = __pgd(0);
- /* make sure the current pgd table points to something sane
+ /* make sure the current pml4 table points to something sane
* (even if it is most probably not used until the next
* switch_mm)
*/
- current_pgd = init_mm.pgd;
+ current_pml4 = init_mm.pml4;
/* initialise the TLB (tlb.c) */
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/cris/arch-v10/mm/tlb.c linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/tlb.c
--- linux-2.6.10rc1/arch/cris/arch-v10/mm/tlb.c 2004-06-16 12:22:42.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/cris/arch-v10/mm/tlb.c 2004-10-25 04:48:09.000000000 +0200
@@ -225,7 +225,7 @@ switch_mm(struct mm_struct *prev, struct
* the pgd.
*/
- current_pgd = next->pgd;
+ current_pml4 = next->pml4;
/* switch context in the MMU */
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/cris/mm/fault.c linux-2.6.10rc1-4level/arch/cris/mm/fault.c
--- linux-2.6.10rc1/arch/cris/mm/fault.c 2004-06-16 12:22:42.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/cris/mm/fault.c 2004-10-25 04:48:09.000000000 +0200
@@ -118,7 +118,7 @@ extern void die_if_kernel(const char *,
/* current active page directory */
-volatile pgd_t *current_pgd;
+volatile pml4_t *current_pml4;
/*
* This routine handles page faults. It determines the address,
@@ -337,7 +337,7 @@ vmalloc_fault:
* Synchronize this task's top level page-table
* with the 'reference' page table.
*
- * Use current_pgd instead of tsk->active_mm->pgd
+ * Use current_pml4 instead of tsk->active_mm->pgd
* since the latter might be unavailable if this
* code is executed in a misfortunately run irq
* (like inside schedule() between switch_mm and
@@ -349,9 +349,9 @@ vmalloc_fault:
pmd_t *pmd, *pmd_k;
pte_t *pte_k;
- pgd = (pgd_t *)current_pgd + offset;
- pgd_k = init_mm.pgd + offset;
-
+ pgd = (pgd_t *)current_pml4 + offset;
+ pgd_k = ((pgd_t *)(init_mm.pml4)) + offset;
+
/* Since we're two-level, we don't need to do both
* set_pgd and set_pmd (they do the same thing). If
* we go three-level at some point, do the right thing
diff -urpN -X ../KDIFX linux-2.6.10rc1/arch/cris/mm/ioremap.c linux-2.6.10rc1-4level/arch/cris/mm/ioremap.c
--- linux-2.6.10rc1/arch/cris/mm/ioremap.c 2004-06-16 12:22:42.000000000 +0200
+++ linux-2.6.10rc1-4level/arch/cris/mm/ioremap.c 2004-10-25 04:48:09.000000000 +0200
@@ -71,7 +71,7 @@ static int remap_area_pages(unsigned lon
unsigned long end = address + size;
phys_addr -= address;
- dir = pgd_offset(&init_mm, address);
+ dir = pml4_pgd_offset(pml4_offset(&init_mm, address), address);
flush_cache_all();
if (address >= end)
BUG();
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-cris/mmu_context.h linux-2.6.10rc1-4level/include/asm-cris/mmu_context.h
--- linux-2.6.10rc1/include/asm-cris/mmu_context.h 2004-03-21 21:11:57.000000000 +0100
+++ linux-2.6.10rc1-4level/include/asm-cris/mmu_context.h 2004-10-25 04:48:10.000000000 +0200
@@ -11,11 +11,11 @@ extern void switch_mm(struct mm_struct *
#define activate_mm(prev,next) switch_mm((prev),(next),NULL)
-/* current active pgd - this is similar to other processors pgd
+/* current active pml4 - this is similar to other processors pgd
* registers like cr3 on the i386
*/
-extern volatile pgd_t *current_pgd; /* defined in arch/cris/mm/fault.c */
+extern volatile pml4_t *current_pml4; /* defined in arch/cris/mm/fault.c */
static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-cris/page.h linux-2.6.10rc1-4level/include/asm-cris/page.h
--- linux-2.6.10rc1/include/asm-cris/page.h 2004-06-16 12:23:24.000000000 +0200
+++ linux-2.6.10rc1-4level/include/asm-cris/page.h 2004-10-25 04:48:10.000000000 +0200
@@ -95,6 +95,7 @@ static inline int get_order(unsigned lon
#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__ */
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-cris/pgalloc.h linux-2.6.10rc1-4level/include/asm-cris/pgalloc.h
--- linux-2.6.10rc1/include/asm-cris/pgalloc.h 2004-03-21 21:11:57.000000000 +0100
+++ linux-2.6.10rc1-4level/include/asm-cris/pgalloc.h 2004-10-25 04:48:10.000000000 +0200
@@ -12,9 +12,9 @@
* Allocate and free page tables.
*/
-extern inline pgd_t *pgd_alloc (struct mm_struct *mm)
+extern inline pgd_t *__pgd_alloc (struct mm_struct *mm, pml4_t *pml4, unsigned long address)
{
- return (pgd_t *)get_zeroed_page(GFP_KERNEL);
+ return (pgd_t *)get_zeroed_page(GFP_KERNEL);
}
extern inline void pgd_free (pgd_t *pgd)
@@ -64,4 +64,6 @@ extern inline void pte_free(struct page
#define check_pgt_cache() do { } while (0)
+#include <asm-generic/nopml4-pgalloc.h>
+
#endif
diff -urpN -X ../KDIFX linux-2.6.10rc1/include/asm-cris/pgtable.h linux-2.6.10rc1-4level/include/asm-cris/pgtable.h
--- linux-2.6.10rc1/include/asm-cris/pgtable.h 2004-06-16 12:23:24.000000000 +0200
+++ linux-2.6.10rc1-4level/include/asm-cris/pgtable.h 2004-10-25 04:48:10.000000000 +0200
@@ -272,12 +272,7 @@ extern inline void pmd_set(pmd_t * pmdp,
/* to find an entry in a page-table-directory. */
#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-
-/* to find an entry in a page-table-directory */
-extern inline pgd_t * pgd_offset(struct mm_struct * mm, unsigned long address)
-{
- return mm->pgd + pgd_index(address);
-}
+#define pgd_index_k(addr) pgd_index(addr)
/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
@@ -344,5 +339,8 @@ extern inline void update_mmu_cache(stru
#define pte_to_pgoff(x) (pte_val(x) >> 6)
#define pgoff_to_pte(x) __pte(((x) << 6) | _PAGE_FILE)
+#include <asm-generic/pgtable.h>
+#include <asm-generic/nopml4-pgtable.h>
+
#endif /* __ASSEMBLY__ */
#endif /* _CRIS_PGTABLE_H */
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