diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/pc98/pc98/machdep.c | 37 |
1 files changed, 8 insertions, 29 deletions
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c index 4fb29a4..a42b903 100644 --- a/sys/pc98/pc98/machdep.c +++ b/sys/pc98/pc98/machdep.c @@ -2791,45 +2791,24 @@ user_dbreg_trap(void) #ifdef KDB /* - * Provide inb() and outb() as functions. They are normally only - * available as macros calling inlined functions, thus cannot be - * called from the debugger. - * - * The actual code is stolen from <machine/cpufunc.h>, and de-inlined. + * Provide inb() and outb() as functions. They are normally only available as + * inline functions, thus cannot be called from the debugger. */ -#undef inb -#undef outb - /* silence compiler warnings */ -u_char inb(u_int); -void outb(u_int, u_char); +u_char inb_(u_short); +void outb_(u_short, u_char); u_char -inb(u_int port) +inb_(u_short port) { - u_char data; - /* - * We use %%dx and not %1 here because i/o is done at %dx and not at - * %edx, while gcc generates inferior code (movw instead of movl) - * if we tell it to load (u_short) port. - */ - __asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port)); - return (data); + return inb(port); } void -outb(u_int port, u_char data) +outb_(u_short port, u_char data) { - u_char al; - /* - * Use an unnecessary assignment to help gcc's register allocator. - * This make a large difference for gcc-1.40 and a tiny difference - * for gcc-2.6.0. For gcc-1.40, al had to be ``asm("ax")'' for - * best results. gcc-2.6.0 can't handle this. - */ - al = data; - __asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port)); + outb(port, data); } #endif /* KDB */ |
