new copyright; att/bsd/shared

[unix-history] / usr / src / sys / tahoe / include / spl.c

/*      spl.c   1.2     85/07/29        */

#include "../tahoe/mtpr.h"

spl0()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0);
       return (oldipl);
}

spl1()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 1);
       return (oldipl);
}

splnet()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0xC);
       return (oldipl);
}

spl8()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0x10+8);
       return (oldipl);
}

#ifdef notdef   /* use splx() instead */
spl5()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0x10+5);
       return (oldipl);
}

spl4()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0x10+4);
       return (oldipl);
}

spl6()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0x10+6);
       return (oldipl);
}
#endif

splimp()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 0x10+8);
       return (oldipl);
}

splsoftclock()
{
       register int oldipl;

       oldipl = mfpr(IPL);
       mtpr(IPL, 8);
       return (oldipl);
}

splx(oldipl)
       int oldipl;
{

       mtpr(IPL, oldipl);
}