|
@@ -25,29 +25,32 @@
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
|
|
-int hwreg_present( volatile void *regp )
|
|
|
+int hwreg_present(volatile void *regp)
|
|
|
{
|
|
|
- int ret = 0;
|
|
|
- long save_sp, save_vbr;
|
|
|
- long tmp_vectors[3];
|
|
|
+ int ret = 0;
|
|
|
+ unsigned long flags;
|
|
|
+ long save_sp, save_vbr;
|
|
|
+ long tmp_vectors[3];
|
|
|
|
|
|
- __asm__ __volatile__
|
|
|
- ( "movec %/vbr,%2\n\t"
|
|
|
- "movel #Lberr1,%4@(8)\n\t"
|
|
|
- "movec %4,%/vbr\n\t"
|
|
|
- "movel %/sp,%1\n\t"
|
|
|
- "moveq #0,%0\n\t"
|
|
|
- "tstb %3@\n\t"
|
|
|
+ local_irq_save(flags);
|
|
|
+ __asm__ __volatile__ (
|
|
|
+ "movec %/vbr,%2\n\t"
|
|
|
+ "movel #Lberr1,%4@(8)\n\t"
|
|
|
+ "movec %4,%/vbr\n\t"
|
|
|
+ "movel %/sp,%1\n\t"
|
|
|
+ "moveq #0,%0\n\t"
|
|
|
+ "tstb %3@\n\t"
|
|
|
"nop\n\t"
|
|
|
- "moveq #1,%0\n"
|
|
|
- "Lberr1:\n\t"
|
|
|
- "movel %1,%/sp\n\t"
|
|
|
- "movec %2,%/vbr"
|
|
|
+ "moveq #1,%0\n"
|
|
|
+ "Lberr1:\n\t"
|
|
|
+ "movel %1,%/sp\n\t"
|
|
|
+ "movec %2,%/vbr"
|
|
|
: "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr)
|
|
|
: "a" (regp), "a" (tmp_vectors)
|
|
|
- );
|
|
|
+ );
|
|
|
+ local_irq_restore(flags);
|
|
|
|
|
|
- return( ret );
|
|
|
+ return ret;
|
|
|
}
|
|
|
EXPORT_SYMBOL(hwreg_present);
|
|
|
|
|
@@ -55,31 +58,36 @@ EXPORT_SYMBOL(hwreg_present);
|
|
|
* by a bus error handler. Returns 1 if successful, 0 otherwise.
|
|
|
*/
|
|
|
|
|
|
-int hwreg_write( volatile void *regp, unsigned short val )
|
|
|
+int hwreg_write(volatile void *regp, unsigned short val)
|
|
|
{
|
|
|
- int ret;
|
|
|
- long save_sp, save_vbr;
|
|
|
- long tmp_vectors[3];
|
|
|
+ int ret;
|
|
|
+ unsigned long flags;
|
|
|
+ long save_sp, save_vbr;
|
|
|
+ long tmp_vectors[3];
|
|
|
|
|
|
- __asm__ __volatile__
|
|
|
- ( "movec %/vbr,%2\n\t"
|
|
|
- "movel #Lberr2,%4@(8)\n\t"
|
|
|
- "movec %4,%/vbr\n\t"
|
|
|
- "movel %/sp,%1\n\t"
|
|
|
- "moveq #0,%0\n\t"
|
|
|
- "movew %5,%3@\n\t"
|
|
|
- "nop \n\t" /* If this nop isn't present, 'ret' may already be
|
|
|
- * loaded with 1 at the time the bus error
|
|
|
- * happens! */
|
|
|
- "moveq #1,%0\n"
|
|
|
+ local_irq_save(flags);
|
|
|
+ __asm__ __volatile__ (
|
|
|
+ "movec %/vbr,%2\n\t"
|
|
|
+ "movel #Lberr2,%4@(8)\n\t"
|
|
|
+ "movec %4,%/vbr\n\t"
|
|
|
+ "movel %/sp,%1\n\t"
|
|
|
+ "moveq #0,%0\n\t"
|
|
|
+ "movew %5,%3@\n\t"
|
|
|
+ "nop\n\t"
|
|
|
+ /*
|
|
|
+ * If this nop isn't present, 'ret' may already be loaded
|
|
|
+ * with 1 at the time the bus error happens!
|
|
|
+ */
|
|
|
+ "moveq #1,%0\n"
|
|
|
"Lberr2:\n\t"
|
|
|
- "movel %1,%/sp\n\t"
|
|
|
- "movec %2,%/vbr"
|
|
|
+ "movel %1,%/sp\n\t"
|
|
|
+ "movec %2,%/vbr"
|
|
|
: "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr)
|
|
|
: "a" (regp), "a" (tmp_vectors), "g" (val)
|
|
|
);
|
|
|
+ local_irq_restore(flags);
|
|
|
|
|
|
- return( ret );
|
|
|
+ return ret;
|
|
|
}
|
|
|
EXPORT_SYMBOL(hwreg_write);
|
|
|
|