Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 671 insertions, 0 deletions

diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
new file mode 100644
index 0000000..2ed7b78
--- /dev/null
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -0,0 +1,671 @@
+/*
+ * linux/arch/m68k/kernel/sys_m68k.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/m68k
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/cachectl.h>
+#include <asm/traps.h>
+#include <asm/ipc.h>
+#include <asm/page.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long * fildes)
+{
+	int fd[2];
+	int error;
+
+	error = do_pipe(fd);
+	if (!error) {
+		if (copy_to_user(fildes, fd, 2*sizeof(int)))
+			error = -EFAULT;
+	}
+	return error;
+}
+
+/* common code for old and new mmaps */
+static inline long do_mmap2(
+	unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	int error = -EBADF;
+	struct file * file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			goto out;
+	}
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+
+	if (file)
+		fput(file);
+out:
+	return error;
+}
+
+asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	return do_mmap2(addr, len, prot, flags, fd, pgoff);
+}
+
+/*
+ * Perform the select(nd, in, out, ex, tv) and mmap() system
+ * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
+ * handle more than 4 system call parameters, so these system calls
+ * used a memory block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+	unsigned long addr;
+	unsigned long len;
+	unsigned long prot;
+	unsigned long flags;
+	unsigned long fd;
+	unsigned long offset;
+};
+
+asmlinkage int old_mmap(struct mmap_arg_struct *arg)
+{
+	struct mmap_arg_struct a;
+	int error = -EFAULT;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		goto out;
+
+	error = -EINVAL;
+	if (a.offset & ~PAGE_MASK)
+		goto out;
+
+	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+	error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+out:
+	return error;
+}
+
+#if 0
+struct mmap_arg_struct64 {
+	__u32 addr;
+	__u32 len;
+	__u32 prot;
+	__u32 flags;
+	__u64 offset; /* 64 bits */
+	__u32 fd;
+};
+
+asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
+{
+	int error = -EFAULT;
+	struct file * file = NULL;
+	struct mmap_arg_struct64 a;
+	unsigned long pgoff;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+
+	if ((long)a.offset & ~PAGE_MASK)
+		return -EINVAL;
+
+	pgoff = a.offset >> PAGE_SHIFT;
+	if ((a.offset >> PAGE_SHIFT) != pgoff)
+		return -EINVAL;
+
+	if (!(a.flags & MAP_ANONYMOUS)) {
+		error = -EBADF;
+		file = fget(a.fd);
+		if (!file)
+			goto out;
+	}
+	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
+	up_write(&current->mm->mmap_sem);
+	if (file)
+		fput(file);
+out:
+	return error;
+}
+#endif
+
+struct sel_arg_struct {
+	unsigned long n;
+	fd_set *inp, *outp, *exp;
+	struct timeval *tvp;
+};
+
+asmlinkage int old_select(struct sel_arg_struct *arg)
+{
+	struct sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	/* sys_select() does the appropriate kernel locking */
+	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc (uint call, int first, int second,
+			int third, void *ptr, long fifth)
+{
+	int version, ret;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	if (call <= SEMCTL)
+		switch (call) {
+		case SEMOP:
+			return sys_semop (first, (struct sembuf *)ptr, second);
+		case SEMGET:
+			return sys_semget (first, second, third);
+		case SEMCTL: {
+			union semun fourth;
+			if (!ptr)
+				return -EINVAL;
+			if (get_user(fourth.__pad, (void **) ptr))
+				return -EFAULT;
+			return sys_semctl (first, second, third, fourth);
+			}
+		default:
+			return -ENOSYS;
+		}
+	if (call <= MSGCTL)
+		switch (call) {
+		case MSGSND:
+			return sys_msgsnd (first, (struct msgbuf *) ptr,
+					  second, third);
+		case MSGRCV:
+			switch (version) {
+			case 0: {
+				struct ipc_kludge tmp;
+				if (!ptr)
+					return -EINVAL;
+				if (copy_from_user (&tmp,
+						    (struct ipc_kludge *)ptr,
+						    sizeof (tmp)))
+					return -EFAULT;
+				return sys_msgrcv (first, tmp.msgp, second,
+						   tmp.msgtyp, third);
+				}
+			default:
+				return sys_msgrcv (first,
+						   (struct msgbuf *) ptr,
+						   second, fifth, third);
+			}
+		case MSGGET:
+			return sys_msgget ((key_t) first, second);
+		case MSGCTL:
+			return sys_msgctl (first, second,
+					   (struct msqid_ds *) ptr);
+		default:
+			return -ENOSYS;
+		}
+	if (call <= SHMCTL)
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			default: {
+				ulong raddr;
+				ret = do_shmat (first, (char *) ptr,
+						 second, &raddr);
+				if (ret)
+					return ret;
+				return put_user (raddr, (ulong *) third);
+			}
+			}
+		case SHMDT:
+			return sys_shmdt ((char *)ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second,
+					   (struct shmid_ds *) ptr);
+		default:
+			return -ENOSYS;
+		}
+
+	return -EINVAL;
+}
+
+/* Convert virtual (user) address VADDR to physical address PADDR */
+#define virt_to_phys_040(vaddr)						\
+({									\
+  unsigned long _mmusr, _paddr;						\
+									\
+  __asm__ __volatile__ (".chip 68040\n\t"				\
+			"ptestr (%1)\n\t"				\
+			"movec %%mmusr,%0\n\t"				\
+			".chip 68k"					\
+			: "=r" (_mmusr)					\
+			: "a" (vaddr));					\
+  _paddr = (_mmusr & MMU_R_040) ? (_mmusr & PAGE_MASK) : 0;		\
+  _paddr;								\
+})
+
+static inline int
+cache_flush_040 (unsigned long addr, int scope, int cache, unsigned long len)
+{
+  unsigned long paddr, i;
+
+  switch (scope)
+    {
+    case FLUSH_SCOPE_ALL:
+      switch (cache)
+	{
+	case FLUSH_CACHE_DATA:
+	  /* This nop is needed for some broken versions of the 68040.  */
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %dc\n\t"
+				".chip 68k");
+	  break;
+	case FLUSH_CACHE_INSN:
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %ic\n\t"
+				".chip 68k");
+	  break;
+	default:
+	case FLUSH_CACHE_BOTH:
+	  __asm__ __volatile__ ("nop\n\t"
+				".chip 68040\n\t"
+				"cpusha %bc\n\t"
+				".chip 68k");
+	  break;
+	}
+      break;
+
+    case FLUSH_SCOPE_LINE:
+      /* Find the physical address of the first mapped page in the
+	 address range.  */
+      if ((paddr = virt_to_phys_040(addr))) {
+        paddr += addr & ~(PAGE_MASK | 15);
+        len = (len + (addr & 15) + 15) >> 4;
+      } else {
+	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
+
+	if (len <= tmp)
+	  return 0;
+	addr += tmp;
+	len -= tmp;
+	tmp = PAGE_SIZE;
+	for (;;)
+	  {
+	    if ((paddr = virt_to_phys_040(addr)))
+	      break;
+	    if (len <= tmp)
+	      return 0;
+	    addr += tmp;
+	    len -= tmp;
+	  }
+	len = (len + 15) >> 4;
+      }
+      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
+      while (len--)
+	{
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushl %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	  if (!--i && len)
+	    {
+	      /*
+	       * No need to page align here since it is done by
+	       * virt_to_phys_040().
+	       */
+	      addr += PAGE_SIZE;
+	      i = PAGE_SIZE / 16;
+	      /* Recompute physical address when crossing a page
+	         boundary. */
+	      for (;;)
+		{
+		  if ((paddr = virt_to_phys_040(addr)))
+		    break;
+		  if (len <= i)
+		    return 0;
+		  len -= i;
+		  addr += PAGE_SIZE;
+		}
+	    }
+	  else
+	    paddr += 16;
+	}
+      break;
+
+    default:
+    case FLUSH_SCOPE_PAGE:
+      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
+      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
+	{
+	  if (!(paddr = virt_to_phys_040(addr)))
+	    continue;
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ ("nop\n\t"
+				    ".chip 68040\n\t"
+				    "cpushp %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	}
+      break;
+    }
+  return 0;
+}
+
+#define virt_to_phys_060(vaddr)				\
+({							\
+  unsigned long paddr;					\
+  __asm__ __volatile__ (".chip 68060\n\t"		\
+			"plpar (%0)\n\t"		\
+			".chip 68k"			\
+			: "=a" (paddr)			\
+			: "0" (vaddr));			\
+  (paddr); /* XXX */					\
+})
+
+static inline int
+cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len)
+{
+  unsigned long paddr, i;
+
+  /*
+   * 68060 manual says:
+   *  cpush %dc : flush DC, remains valid (with our %cacr setup)
+   *  cpush %ic : invalidate IC
+   *  cpush %bc : flush DC + invalidate IC
+   */
+  switch (scope)
+    {
+    case FLUSH_SCOPE_ALL:
+      switch (cache)
+	{
+	case FLUSH_CACHE_DATA:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %dc\n\t"
+				".chip 68k");
+	  break;
+	case FLUSH_CACHE_INSN:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %ic\n\t"
+				".chip 68k");
+	  break;
+	default:
+	case FLUSH_CACHE_BOTH:
+	  __asm__ __volatile__ (".chip 68060\n\t"
+				"cpusha %bc\n\t"
+				".chip 68k");
+	  break;
+	}
+      break;
+
+    case FLUSH_SCOPE_LINE:
+      /* Find the physical address of the first mapped page in the
+	 address range.  */
+      len += addr & 15;
+      addr &= -16;
+      if (!(paddr = virt_to_phys_060(addr))) {
+	unsigned long tmp = PAGE_SIZE - (addr & ~PAGE_MASK);
+
+	if (len <= tmp)
+	  return 0;
+	addr += tmp;
+	len -= tmp;
+	tmp = PAGE_SIZE;
+	for (;;)
+	  {
+	    if ((paddr = virt_to_phys_060(addr)))
+	      break;
+	    if (len <= tmp)
+	      return 0;
+	    addr += tmp;
+	    len -= tmp;
+	  }
+      }
+      len = (len + 15) >> 4;
+      i = (PAGE_SIZE - (paddr & ~PAGE_MASK)) >> 4;
+      while (len--)
+	{
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushl %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	  if (!--i && len)
+	    {
+
+	      /*
+	       * We just want to jump to the first cache line
+	       * in the next page.
+	       */
+	      addr += PAGE_SIZE;
+	      addr &= PAGE_MASK;
+
+	      i = PAGE_SIZE / 16;
+	      /* Recompute physical address when crossing a page
+	         boundary. */
+	      for (;;)
+	        {
+	          if ((paddr = virt_to_phys_060(addr)))
+	            break;
+	          if (len <= i)
+	            return 0;
+	          len -= i;
+	          addr += PAGE_SIZE;
+	        }
+	    }
+	  else
+	    paddr += 16;
+	}
+      break;
+
+    default:
+    case FLUSH_SCOPE_PAGE:
+      len += (addr & ~PAGE_MASK) + (PAGE_SIZE - 1);
+      addr &= PAGE_MASK;	/* Workaround for bug in some
+				   revisions of the 68060 */
+      for (len >>= PAGE_SHIFT; len--; addr += PAGE_SIZE)
+	{
+	  if (!(paddr = virt_to_phys_060(addr)))
+	    continue;
+	  switch (cache)
+	    {
+	    case FLUSH_CACHE_DATA:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%dc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    case FLUSH_CACHE_INSN:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%ic,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    default:
+	    case FLUSH_CACHE_BOTH:
+	      __asm__ __volatile__ (".chip 68060\n\t"
+				    "cpushp %%bc,(%0)\n\t"
+				    ".chip 68k"
+				    : : "a" (paddr));
+	      break;
+	    }
+	}
+      break;
+    }
+  return 0;
+}
+
+/* sys_cacheflush -- flush (part of) the processor cache.  */
+asmlinkage int
+sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
+{
+	struct vm_area_struct *vma;
+	int ret = -EINVAL;
+
+	lock_kernel();
+	if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL ||
+	    cache & ~FLUSH_CACHE_BOTH)
+		goto out;
+
+	if (scope == FLUSH_SCOPE_ALL) {
+		/* Only the superuser may explicitly flush the whole cache. */
+		ret = -EPERM;
+		if (!capable(CAP_SYS_ADMIN))
+			goto out;
+	} else {
+		/*
+		 * Verify that the specified address region actually belongs
+		 * to this process.
+		 */
+		vma = find_vma (current->mm, addr);
+		ret = -EINVAL;
+		/* Check for overflow.  */
+		if (addr + len < addr)
+			goto out;
+		if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end)
+			goto out;
+	}
+
+	if (CPU_IS_020_OR_030) {
+		if (scope == FLUSH_SCOPE_LINE && len < 256) {
+			unsigned long cacr;
+			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
+			if (cache & FLUSH_CACHE_INSN)
+				cacr |= 4;
+			if (cache & FLUSH_CACHE_DATA)
+				cacr |= 0x400;
+			len >>= 2;
+			while (len--) {
+				__asm__ __volatile__ ("movec %1, %%caar\n\t"
+						      "movec %0, %%cacr"
+						      : /* no outputs */
+						      : "r" (cacr), "r" (addr));
+				addr += 4;
+			}
+		} else {
+			/* Flush the whole cache, even if page granularity requested. */
+			unsigned long cacr;
+			__asm__ ("movec %%cacr, %0" : "=r" (cacr));
+			if (cache & FLUSH_CACHE_INSN)
+				cacr |= 8;
+			if (cache & FLUSH_CACHE_DATA)
+				cacr |= 0x800;
+			__asm__ __volatile__ ("movec %0, %%cacr" : : "r" (cacr));
+		}
+		ret = 0;
+		goto out;
+	} else {
+	    /*
+	     * 040 or 060: don't blindly trust 'scope', someone could
+	     * try to flush a few megs of memory.
+	     */
+
+	    if (len>=3*PAGE_SIZE && scope<FLUSH_SCOPE_PAGE)
+	        scope=FLUSH_SCOPE_PAGE;
+	    if (len>=10*PAGE_SIZE && scope<FLUSH_SCOPE_ALL)
+	        scope=FLUSH_SCOPE_ALL;
+	    if (CPU_IS_040) {
+		ret = cache_flush_040 (addr, scope, cache, len);
+	    } else if (CPU_IS_060) {
+		ret = cache_flush_060 (addr, scope, cache, len);
+	    }
+	}
+out:
+	unlock_kernel();
+	return ret;
+}
+
+asmlinkage int sys_getpagesize(void)
+{
+	return PAGE_SIZE;
+}