#ifndef _S390_PAGE_H
#define _S390_PAGE_H
-#include <asm/setup.h>
#include <asm/types.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
#ifdef __KERNEL__
+#include <asm/setup.h>
#ifndef __ASSEMBLY__
-#ifndef __s390x__
-
-static inline void clear_page(void *page)
-{
- register_pair rp;
-
- rp.subreg.even = (unsigned long) page;
- rp.subreg.odd = (unsigned long) 4096;
- asm volatile (" slr 1,1\n"
- " mvcl %0,0"
- : "+&a" (rp) : : "memory", "cc", "1" );
-}
-
-static inline void copy_page(void *to, void *from)
-{
- if (MACHINE_HAS_MVPG)
- asm volatile (" sr 0,0\n"
- " mvpg %0,%1"
- : : "a" ((void *)(to)), "a" ((void *)(from))
- : "memory", "cc", "0" );
- else
- asm volatile (" mvc 0(256,%0),0(%1)\n"
- " mvc 256(256,%0),256(%1)\n"
- " mvc 512(256,%0),512(%1)\n"
- " mvc 768(256,%0),768(%1)\n"
- " mvc 1024(256,%0),1024(%1)\n"
- " mvc 1280(256,%0),1280(%1)\n"
- " mvc 1536(256,%0),1536(%1)\n"
- " mvc 1792(256,%0),1792(%1)\n"
- " mvc 2048(256,%0),2048(%1)\n"
- " mvc 2304(256,%0),2304(%1)\n"
- " mvc 2560(256,%0),2560(%1)\n"
- " mvc 2816(256,%0),2816(%1)\n"
- " mvc 3072(256,%0),3072(%1)\n"
- " mvc 3328(256,%0),3328(%1)\n"
- " mvc 3584(256,%0),3584(%1)\n"
- " mvc 3840(256,%0),3840(%1)\n"
- : : "a"((void *)(to)),"a"((void *)(from))
- : "memory" );
-}
-
-#else /* __s390x__ */
-
static inline void clear_page(void *page)
{
- asm volatile (" lgr 2,%0\n"
- " lghi 3,4096\n"
- " slgr 1,1\n"
- " mvcl 2,0"
- : : "a" ((void *) (page))
- : "memory", "cc", "1", "2", "3" );
+ register unsigned long reg1 asm ("1") = 0;
+ register void *reg2 asm ("2") = page;
+ register unsigned long reg3 asm ("3") = 4096;
+ asm volatile(
+ " mvcl 2,0"
+ : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
}
static inline void copy_page(void *to, void *from)
{
- if (MACHINE_HAS_MVPG)
- asm volatile (" sgr 0,0\n"
- " mvpg %0,%1"
- : : "a" ((void *)(to)), "a" ((void *)(from))
- : "memory", "cc", "0" );
- else
- asm volatile (" mvc 0(256,%0),0(%1)\n"
- " mvc 256(256,%0),256(%1)\n"
- " mvc 512(256,%0),512(%1)\n"
- " mvc 768(256,%0),768(%1)\n"
- " mvc 1024(256,%0),1024(%1)\n"
- " mvc 1280(256,%0),1280(%1)\n"
- " mvc 1536(256,%0),1536(%1)\n"
- " mvc 1792(256,%0),1792(%1)\n"
- " mvc 2048(256,%0),2048(%1)\n"
- " mvc 2304(256,%0),2304(%1)\n"
- " mvc 2560(256,%0),2560(%1)\n"
- " mvc 2816(256,%0),2816(%1)\n"
- " mvc 3072(256,%0),3072(%1)\n"
- " mvc 3328(256,%0),3328(%1)\n"
- " mvc 3584(256,%0),3584(%1)\n"
- " mvc 3840(256,%0),3840(%1)\n"
- : : "a"((void *)(to)),"a"((void *)(from))
- : "memory" );
+ if (MACHINE_HAS_MVPG) {
+ register unsigned long reg0 asm ("0") = 0;
+ asm volatile(
+ " mvpg %0,%1"
+ : : "a" (to), "a" (from), "d" (reg0)
+ : "memory", "cc");
+ } else
+ asm volatile(
+ " mvc 0(256,%0),0(%1)\n"
+ " mvc 256(256,%0),256(%1)\n"
+ " mvc 512(256,%0),512(%1)\n"
+ " mvc 768(256,%0),768(%1)\n"
+ " mvc 1024(256,%0),1024(%1)\n"
+ " mvc 1280(256,%0),1280(%1)\n"
+ " mvc 1536(256,%0),1536(%1)\n"
+ " mvc 1792(256,%0),1792(%1)\n"
+ " mvc 2048(256,%0),2048(%1)\n"
+ " mvc 2304(256,%0),2304(%1)\n"
+ " mvc 2560(256,%0),2560(%1)\n"
+ " mvc 2816(256,%0),2816(%1)\n"
+ " mvc 3072(256,%0),3072(%1)\n"
+ " mvc 3328(256,%0),3328(%1)\n"
+ " mvc 3584(256,%0),3584(%1)\n"
+ " mvc 3840(256,%0),3840(%1)\n"
+ : : "a" (to), "a" (from) : "memory");
}
-#endif /* __s390x__ */
-
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
static inline void
page_set_storage_key(unsigned long addr, unsigned int skey)
{
- asm volatile ( "sske %0,%1" : : "d" (skey), "a" (addr) );
+ asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
}
static inline unsigned int
{
unsigned int skey;
- asm volatile ( "iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0) );
-
+ asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
return skey;
}
+extern unsigned long max_pfn;
+
+static inline int pfn_valid(unsigned long pfn)
+{
+ unsigned long dummy;
+ int ccode;
+
+ if (pfn >= max_pfn)
+ return 0;
+
+ asm volatile(
+ " lra %0,0(%2)\n"
+ " ipm %1\n"
+ " srl %1,28\n"
+ : "=d" (dummy), "=d" (ccode)
+ : "a" (pfn << PAGE_SHIFT)
+ : "cc");
+ return !ccode;
+}
+
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
#define PAGE_OFFSET 0x0UL
#define __pa(x) (unsigned long)(x)
#define __va(x) (void *)(unsigned long)(x)
-#define pfn_to_page(pfn) (mem_map + (pfn))
-#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
-
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-#endif /* __KERNEL__ */
-
+#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
+#define devmem_is_allowed(x) 1
+
+#endif /* __KERNEL__ */
+
#endif /* _S390_PAGE_H */
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