f7fe93344f
Adrian Bunk reported that enabling 4MB page size breaks the build. The problem is that MAX_ORDER combined with the page shift exceeds the SECTION_SIZE_BITS we use in asm-sparc64/sparsemem.h There are several ways I suppose we could work around this. For one we could define a CONFIG_FORCE_MAX_ZONEORDER to decrease MAX_ORDER in these higher page size cases. But I also know that these page size cases are broken wrt. TLB miss handling especially on pre-hypervisor systems, and there isn't an easy way to fix that. These options were meant to be fun experimental hacks anyways, and only 8K and 64K make any sense to support. So remove 512K and 4M base page size support. Of course, we still support these page sizes for huge pages. Signed-off-by: David S. Miller <davem@davemloft.net>
139 lines
3.8 KiB
C
139 lines
3.8 KiB
C
#ifndef _SPARC64_PAGE_H
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#define _SPARC64_PAGE_H
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#include <linux/const.h>
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#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
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#define PAGE_SHIFT 13
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#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
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#define PAGE_SHIFT 16
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#else
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#error No page size specified in kernel configuration
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#endif
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#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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/* Flushing for D-cache alias handling is only needed if
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* the page size is smaller than 16K.
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*/
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#if PAGE_SHIFT < 14
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#define DCACHE_ALIASING_POSSIBLE
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#endif
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#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
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#define HPAGE_SHIFT 22
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
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#define HPAGE_SHIFT 19
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#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
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#define HPAGE_SHIFT 16
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#endif
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#ifdef CONFIG_HUGETLB_PAGE
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#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
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#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
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#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
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#endif
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#ifndef __ASSEMBLY__
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extern void _clear_page(void *page);
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#define clear_page(X) _clear_page((void *)(X))
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struct page;
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extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
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#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
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extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
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/* Unlike sparc32, sparc64's parameter passing API is more
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* sane in that structures which as small enough are passed
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* in registers instead of on the stack. Thus, setting
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* STRICT_MM_TYPECHECKS does not generate worse code so
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* let's enable it to get the type checking.
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*/
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#define STRICT_MM_TYPECHECKS
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#ifdef STRICT_MM_TYPECHECKS
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/* These are used to make use of C type-checking.. */
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long iopte; } iopte_t;
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typedef struct { unsigned int pmd; } pmd_t;
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typedef struct { unsigned int pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pte_val(x) ((x).pte)
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#define iopte_val(x) ((x).iopte)
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#define pmd_val(x) ((x).pmd)
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __iopte(x) ((iopte_t) { (x) } )
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#define __pmd(x) ((pmd_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#else
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/* .. while these make it easier on the compiler */
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typedef unsigned long pte_t;
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typedef unsigned long iopte_t;
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typedef unsigned int pmd_t;
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typedef unsigned int pgd_t;
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typedef unsigned long pgprot_t;
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#define pte_val(x) (x)
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#define iopte_val(x) (x)
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#define pmd_val(x) (x)
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#define pgd_val(x) (x)
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#define pgprot_val(x) (x)
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#define __pte(x) (x)
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#define __iopte(x) (x)
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#define __pmd(x) (x)
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#define __pgd(x) (x)
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#define __pgprot(x) (x)
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#endif /* (STRICT_MM_TYPECHECKS) */
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typedef struct page *pgtable_t;
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#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
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(_AC(0x0000000070000000,UL)) : \
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(_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
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#include <asm-generic/memory_model.h>
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#endif /* !(__ASSEMBLY__) */
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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/* We used to stick this into a hard-coded global register (%g4)
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* but that does not make sense anymore.
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*/
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#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
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#ifndef __ASSEMBLY__
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_to_phys __pa
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#define phys_to_virt __va
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#endif /* !(__ASSEMBLY__) */
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/page.h>
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#endif /* _SPARC64_PAGE_H */
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