m68k,m68knommu: merge header files

Merge header files for m68k and m68knommu to the single location:

    arch/m68k/include/asm

The majority of this patch was the result of the
script that is included in the changelog below.

The script was originally written by Arnd Bergman and
exten by me to cover a few more files.

When the header files differed the script uses the following:

The original m68k file is named <file>_mm.h  [mm for memory manager]
The m68knommu file is named <file>_no.h [no for no memory manager]

The files uses the following include guard:

This include gaurd works as the m68knommu toolchain set
the __uClinux__ symbol - so this should work in userspace too.

Merging the header files for m68k and m68knommu exposes the
(unexpected?) ABI differences thus it is easier to actually
identify these and thus to fix them.

The commit has been build tested with both a m68k and
a m68knommu toolchain - with success.

The commit has also been tested with "make headers_check"
and this patch fixes make headers_check for m68knommu.

The script used:
TARGET=arch/m68k/include/asm
SOURCE=arch/m68knommu/include/asm

INCLUDE="cachectl.h errno.h fcntl.h hwtest.h ioctls.h ipcbuf.h \
linkage.h math-emu.h md.h mman.h movs.h msgbuf.h openprom.h \
oplib.h poll.h posix_types.h resource.h rtc.h sembuf.h shmbuf.h \
shm.h shmparam.h socket.h sockios.h spinlock.h statfs.h stat.h \
termbits.h termios.h tlb.h types.h user.h"

EQUAL="auxvec.h cputime.h device.h emergency-restart.h futex.h \
ioctl.h irq_regs.h kdebug.h local.h mutex.h percpu.h \
sections.h topology.h"

NOMUUFILES="anchor.h bootstd.h coldfire.h commproc.h dbg.h \
elia.h flat.h m5206sim.h m520xsim.h m523xsim.h m5249sim.h \
m5272sim.h m527xsim.h m528xsim.h m5307sim.h m532xsim.h \
m5407sim.h m68360_enet.h m68360.h m68360_pram.h m68360_quicc.h \
m68360_regs.h MC68328.h MC68332.h MC68EZ328.h MC68VZ328.h \
mcfcache.h mcfdma.h mcfmbus.h mcfne.h mcfpci.h mcfpit.h \
mcfsim.h mcfsmc.h mcftimer.h mcfuart.h mcfwdebug.h \
nettel.h quicc_simple.h smp.h"

FILES="atomic.h bitops.h bootinfo.h bug.h bugs.h byteorder.h cache.h \
cacheflush.h checksum.h current.h delay.h div64.h \
dma-mapping.h dma.h elf.h entry.h fb.h fpu.h hardirq.h hw_irq.h io.h \
irq.h kmap_types.h machdep.h mc146818rtc.h mmu.h mmu_context.h \
module.h page.h page_offset.h param.h pci.h pgalloc.h \
pgtable.h processor.h ptrace.h scatterlist.h segment.h \
setup.h sigcontext.h siginfo.h signal.h string.h system.h swab.h \
thread_info.h timex.h tlbflush.h traps.h uaccess.h ucontext.h \
unaligned.h unistd.h"

mergefile() {
	BASE=${1%.h}
	git mv ${SOURCE}/$1 ${TARGET}/${BASE}_no.h
	git mv ${TARGET}/$1 ${TARGET}/${BASE}_mm.h

cat << EOF > ${TARGET}/$1
EOF

	git add ${TARGET}/$1
}

set -e

mkdir -p ${TARGET}

git mv include/asm-m68k/* ${TARGET}
rmdir include/asm-m68k

git rm ${SOURCE}/Kbuild
for F in $INCLUDE $EQUAL; do
	git rm ${SOURCE}/$F
done

for F in $NOMUUFILES; do
	git mv ${SOURCE}/$F ${TARGET}/$F
done

for F in $FILES ; do
	mergefile $F
done

rmdir arch/m68knommu/include/asm
rmdir arch/m68knommu/include

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

1 files changed, 291 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
new file mode 100644
index 00000000000..8e9a8a754dd
--- /dev/null
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -0,0 +1,291 @@
+#ifndef _MOTOROLA_PGTABLE_H
+#define _MOTOROLA_PGTABLE_H
+
+
+/*
+ * Definitions for MMU descriptors
+ */
+#define _PAGE_PRESENT	0x001
+#define _PAGE_SHORT	0x002
+#define _PAGE_RONLY	0x004
+#define _PAGE_ACCESSED	0x008
+#define _PAGE_DIRTY	0x010
+#define _PAGE_SUPER	0x080	/* 68040 supervisor only */
+#define _PAGE_GLOBAL040	0x400	/* 68040 global bit, used for kva descs */
+#define _PAGE_NOCACHE030 0x040	/* 68030 no-cache mode */
+#define _PAGE_NOCACHE	0x060	/* 68040 cache mode, non-serialized */
+#define _PAGE_NOCACHE_S	0x040	/* 68040 no-cache mode, serialized */
+#define _PAGE_CACHE040	0x020	/* 68040 cache mode, cachable, copyback */
+#define _PAGE_CACHE040W	0x000	/* 68040 cache mode, cachable, write-through */
+
+#define _DESCTYPE_MASK	0x003
+
+#define _CACHEMASK040	(~0x060)
+#define _TABLE_MASK	(0xfffffe00)
+
+#define _PAGE_TABLE	(_PAGE_SHORT)
+#define _PAGE_CHG_MASK  (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_NOCACHE)
+
+#define _PAGE_PROTNONE	0x004
+#define _PAGE_FILE	0x008	/* pagecache or swap? */
+
+#ifndef __ASSEMBLY__
+
+/* This is the cache mode to be used for pages containing page descriptors for
+ * processors >= '040. It is in pte_mknocache(), and the variable is defined
+ * and initialized in head.S */
+extern int m68k_pgtable_cachemode;
+
+/* This is the cache mode for normal pages, for supervisor access on
+ * processors >= '040. It is used in pte_mkcache(), and the variable is
+ * defined and initialized in head.S */
+
+#if defined(CPU_M68060_ONLY) && defined(CONFIG_060_WRITETHROUGH)
+#define m68k_supervisor_cachemode _PAGE_CACHE040W
+#elif defined(CPU_M68040_OR_M68060_ONLY)
+#define m68k_supervisor_cachemode _PAGE_CACHE040
+#elif defined(CPU_M68020_OR_M68030_ONLY)
+#define m68k_supervisor_cachemode 0
+#else
+extern int m68k_supervisor_cachemode;
+#endif
+
+#if defined(CPU_M68040_OR_M68060_ONLY)
+#define mm_cachebits _PAGE_CACHE040
+#elif defined(CPU_M68020_OR_M68030_ONLY)
+#define mm_cachebits 0
+#else
+extern unsigned long mm_cachebits;
+#endif
+
+#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED | mm_cachebits)
+#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | mm_cachebits)
+#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED | mm_cachebits)
+#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED | mm_cachebits)
+#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | mm_cachebits)
+
+/* Alternate definitions that are compile time constants, for
+   initializing protection_map.  The cachebits are fixed later.  */
+#define PAGE_NONE_C	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+#define PAGE_SHARED_C	__pgprot(_PAGE_PRESENT | _PAGE_ACCESSED)
+#define PAGE_COPY_C	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED)
+#define PAGE_READONLY_C	__pgprot(_PAGE_PRESENT | _PAGE_RONLY | _PAGE_ACCESSED)
+
+/*
+ * The m68k can't do page protection for execute, and considers that the same are read.
+ * Also, write permissions imply read permissions. This is the closest we can get..
+ */
+#define __P000	PAGE_NONE_C
+#define __P001	PAGE_READONLY_C
+#define __P010	PAGE_COPY_C
+#define __P011	PAGE_COPY_C
+#define __P100	PAGE_READONLY_C
+#define __P101	PAGE_READONLY_C
+#define __P110	PAGE_COPY_C
+#define __P111	PAGE_COPY_C
+
+#define __S000	PAGE_NONE_C
+#define __S001	PAGE_READONLY_C
+#define __S010	PAGE_SHARED_C
+#define __S011	PAGE_SHARED_C
+#define __S100	PAGE_READONLY_C
+#define __S101	PAGE_READONLY_C
+#define __S110	PAGE_SHARED_C
+#define __S111	PAGE_SHARED_C
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+	pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot);
+	return pte;
+}
+
+static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
+{
+	unsigned long ptbl = virt_to_phys(ptep) | _PAGE_TABLE | _PAGE_ACCESSED;
+	unsigned long *ptr = pmdp->pmd;
+	short i = 16;
+	while (--i >= 0) {
+		*ptr++ = ptbl;
+		ptbl += (sizeof(pte_t)*PTRS_PER_PTE/16);
+	}
+}
+
+static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
+{
+	pgd_val(*pgdp) = _PAGE_TABLE | _PAGE_ACCESSED | __pa(pmdp);
+}
+
+#define __pte_page(pte) ((unsigned long)__va(pte_val(pte) & PAGE_MASK))
+#define __pmd_page(pmd) ((unsigned long)__va(pmd_val(pmd) & _TABLE_MASK))
+#define __pgd_page(pgd) ((unsigned long)__va(pgd_val(pgd) & _TABLE_MASK))
+
+
+#define pte_none(pte)		(!pte_val(pte))
+#define pte_present(pte)	(pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROTNONE))
+#define pte_clear(mm,addr,ptep)		({ pte_val(*(ptep)) = 0; })
+
+#define pte_page(pte)		virt_to_page(__va(pte_val(pte)))
+#define pte_pfn(pte)		(pte_val(pte) >> PAGE_SHIFT)
+#define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
+
+#define pmd_none(pmd)		(!pmd_val(pmd))
+#define pmd_bad(pmd)		((pmd_val(pmd) & _DESCTYPE_MASK) != _PAGE_TABLE)
+#define pmd_present(pmd)	(pmd_val(pmd) & _PAGE_TABLE)
+#define pmd_clear(pmdp) ({			\
+	unsigned long *__ptr = pmdp->pmd;	\
+	short __i = 16;				\
+	while (--__i >= 0)			\
+		*__ptr++ = 0;			\
+})
+#define pmd_page(pmd)		virt_to_page(__va(pmd_val(pmd)))
+
+
+#define pgd_none(pgd)		(!pgd_val(pgd))
+#define pgd_bad(pgd)		((pgd_val(pgd) & _DESCTYPE_MASK) != _PAGE_TABLE)
+#define pgd_present(pgd)	(pgd_val(pgd) & _PAGE_TABLE)
+#define pgd_clear(pgdp)		({ pgd_val(*pgdp) = 0; })
+#define pgd_page(pgd)		(mem_map + ((unsigned long)(__va(pgd_val(pgd)) - PAGE_OFFSET) >> PAGE_SHIFT))
+
+#define pte_ERROR(e) \
+	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
+#define pmd_ERROR(e) \
+	printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
+#define pgd_ERROR(e) \
+	printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
+
+
+/*
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+static inline int pte_write(pte_t pte)		{ return !(pte_val(pte) & _PAGE_RONLY); }
+static inline int pte_dirty(pte_t pte)		{ return pte_val(pte) & _PAGE_DIRTY; }
+static inline int pte_young(pte_t pte)		{ return pte_val(pte) & _PAGE_ACCESSED; }
+static inline int pte_file(pte_t pte)		{ return pte_val(pte) & _PAGE_FILE; }
+static inline int pte_special(pte_t pte)	{ return 0; }
+
+static inline pte_t pte_wrprotect(pte_t pte)	{ pte_val(pte) |= _PAGE_RONLY; return pte; }
+static inline pte_t pte_mkclean(pte_t pte)	{ pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
+static inline pte_t pte_mkold(pte_t pte)	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mkwrite(pte_t pte)	{ pte_val(pte) &= ~_PAGE_RONLY; return pte; }
+static inline pte_t pte_mkdirty(pte_t pte)	{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
+static inline pte_t pte_mkyoung(pte_t pte)	{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }
+static inline pte_t pte_mknocache(pte_t pte)
+{
+	pte_val(pte) = (pte_val(pte) & _CACHEMASK040) | m68k_pgtable_cachemode;
+	return pte;
+}
+static inline pte_t pte_mkcache(pte_t pte)
+{
+	pte_val(pte) = (pte_val(pte) & _CACHEMASK040) | m68k_supervisor_cachemode;
+	return pte;
+}
+static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }
+
+#define PAGE_DIR_OFFSET(tsk,address) pgd_offset((tsk),(address))
+
+#define pgd_index(address)     ((address) >> PGDIR_SHIFT)
+
+/* to find an entry in a page-table-directory */
+static inline pgd_t *pgd_offset(const struct mm_struct *mm,
+				unsigned long address)
+{
+	return mm->pgd + pgd_index(address);
+}
+
+#define swapper_pg_dir kernel_pg_dir
+extern pgd_t kernel_pg_dir[128];
+
+static inline pgd_t *pgd_offset_k(unsigned long address)
+{
+	return kernel_pg_dir + (address >> PGDIR_SHIFT);
+}
+
+
+/* Find an entry in the second-level page table.. */
+static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
+{
+	return (pmd_t *)__pgd_page(*dir) + ((address >> PMD_SHIFT) & (PTRS_PER_PMD-1));
+}
+
+/* Find an entry in the third-level page table.. */
+static inline pte_t *pte_offset_kernel(pmd_t *pmdp, unsigned long address)
+{
+	return (pte_t *)__pmd_page(*pmdp) + ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
+}
+
+#define pte_offset_map(pmdp,address) ((pte_t *)__pmd_page(*pmdp) + (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
+#define pte_offset_map_nested(pmdp, address) pte_offset_map(pmdp, address)
+#define pte_unmap(pte)		((void)0)
+#define pte_unmap_nested(pte)	((void)0)
+
+/*
+ * Allocate and free page tables. The xxx_kernel() versions are
+ * used to allocate a kernel page table - this turns on ASN bits
+ * if any.
+ */
+
+/* Prior to calling these routines, the page should have been flushed
+ * from both the cache and ATC, or the CPU might not notice that the
+ * cache setting for the page has been changed. -jskov
+ */
+static inline void nocache_page(void *vaddr)
+{
+	unsigned long addr = (unsigned long)vaddr;
+
+	if (CPU_IS_040_OR_060) {
+		pgd_t *dir;
+		pmd_t *pmdp;
+		pte_t *ptep;
+
+		dir = pgd_offset_k(addr);
+		pmdp = pmd_offset(dir, addr);
+		ptep = pte_offset_kernel(pmdp, addr);
+		*ptep = pte_mknocache(*ptep);
+	}
+}
+
+static inline void cache_page(void *vaddr)
+{
+	unsigned long addr = (unsigned long)vaddr;
+
+	if (CPU_IS_040_OR_060) {
+		pgd_t *dir;
+		pmd_t *pmdp;
+		pte_t *ptep;
+
+		dir = pgd_offset_k(addr);
+		pmdp = pmd_offset(dir, addr);
+		ptep = pte_offset_kernel(pmdp, addr);
+		*ptep = pte_mkcache(*ptep);
+	}
+}
+
+#define PTE_FILE_MAX_BITS	28
+
+static inline unsigned long pte_to_pgoff(pte_t pte)
+{
+	return pte.pte >> 4;
+}
+
+static inline pte_t pgoff_to_pte(unsigned off)
+{
+	pte_t pte = { (off << 4) + _PAGE_FILE };
+	return pte;
+}
+
+/* Encode and de-code a swap entry (must be !pte_none(e) && !pte_present(e)) */
+#define __swp_type(x)		(((x).val >> 4) & 0xff)
+#define __swp_offset(x)		((x).val >> 12)
+#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 4) | ((offset) << 12) })
+#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x)	((pte_t) { (x).val })
+
+#endif	/* !__ASSEMBLY__ */
+#endif /* _MOTOROLA_PGTABLE_H */