OneNAND Initial Program Loader (IPL) support

[oweals/u-boot.git] / cpu / arm925t / interrupts.c

diff --git a/cpu/arm925t/interrupts.c b/cpu/arm925t/interrupts.c
index 7897184fc2f3bb3126f60df915b7d2586bcc69bf..57bb4eab6f648b711d4939da2e9dd9014b26c7c5 100644 (file)
--- a/cpu/arm925t/interrupts.c
+++ b/cpu/arm925t/interrupts.c
@@ -23,7 +23,7 @@
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.         See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
@@ -38,7 +38,6 @@
 
 #include <asm/proc-armv/ptrace.h>
 
-extern void reset_cpu(ulong addr);
 #define TIMER_LOAD_VAL 0xffffffff
 
 /* macro to read the 32 bit timer */
@@ -107,15 +106,15 @@ void show_regs (struct pt_regs *regs)
 
        flags = condition_codes (regs);
 
-       printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
-               "sp : %08lx  ip : %08lx  fp : %08lx\n",
+       printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
+               "sp : %08lx  ip : %08lx  fp : %08lx\n",
                instruction_pointer (regs),
                regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
-       printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
+       printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
                regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
-       printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
+       printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
                regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
-       printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
+       printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
                regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
        printf ("Flags: %c%c%c%c",
                flags & CC_N_BIT ? 'N' : 'n',
@@ -215,43 +214,35 @@ void set_timer (ulong t)
        timestamp = t;
 }
 
-/* delay x useconds AND perserve advance timstamp value */
+/* delay x useconds AND preserve advance timestamp value */
 void udelay (unsigned long usec)
 {
-#ifdef CONFIG_INNOVATOROMAP1510
-#define LOOPS_PER_MSEC 60              /* tuned on omap1510 */
-       volatile int i, time_remaining = LOOPS_PER_MSEC * usec;
-
-       for (i = time_remaining; i > 0; i--) {
-       }
-#else
        ulong tmo, tmp;
 
-       if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
-               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
-               tmo *= CFG_HZ;          /* find number of "ticks" to wait to achieve target */
-               tmo /= 1000;            /* finish normalize. */
-       }else{                          /* else small number, don't kill it prior to HZ multiply */
+       if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
+               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
+               tmo *= CFG_HZ;          /* find number of "ticks" to wait to achieve target */
+               tmo /= 1000;            /* finish normalize. */
+       }else{                          /* else small number, don't kill it prior to HZ multiply */
                tmo = usec * CFG_HZ;
                tmo /= (1000*1000);
        }
 
        tmp = get_timer (0);            /* get current timestamp */
-       if( (tmo + tmp) < tmp )         /* if setting this fordward will roll time stamp */
+       if( (tmo + tmp + 1) < tmp )     /* if setting this fordward will roll time stamp */
                reset_timer_masked ();  /* reset "advancing" timestamp to 0, set lastdec value */
        else
                tmo += tmp;             /* else, set advancing stamp wake up time */
 
-       while (get_timer_masked () < tmo)/* loop till event */
+       while (get_timer_masked () < tmo) /* loop till event */
                /*NOP*/;
-#endif
 }
 
 void reset_timer_masked (void)
 {
        /* reset time */
        lastdec = READ_TIMER;  /* capure current decrementer value time */
-       timestamp = 0;         /* start "advancing" time stamp from 0 */
+       timestamp = 0;         /* start "advancing" time stamp from 0 */
 }
 
 ulong get_timer_masked (void)
@@ -283,21 +274,25 @@ void udelay_masked (unsigned long usec)
     for (i=time_remaining; i>0; i--) { }
 #else
 
-       ulong tmo, tmp;
+       ulong tmo;
+       ulong endtime;
+       signed long diff;
 
-       if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
-               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
-               tmo *= CFG_HZ;          /* find number of "ticks" to wait to achieve target */
-               tmo /= 1000;            /* finish normalize. */
-       }else{                          /* else small number, don't kill it prior to HZ multiply */
+       if (usec >= 1000) {             /* if "big" number, spread normalization to seconds */
+               tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
+               tmo *= CFG_HZ;          /* find number of "ticks" to wait to achieve target */
+               tmo /= 1000;            /* finish normalize. */
+       } else {                        /* else small number, don't kill it prior to HZ multiply */
                tmo = usec * CFG_HZ;
                tmo /= (1000*1000);
        }
 
-       reset_timer_masked ();  /* set "advancing" timestamp to 0, set lastdec vaule */
+       endtime = get_timer_masked () + tmo;
 
-       while (get_timer_masked () < tmo) /* wait for time stamp to overtake tick number.*/
-               /*NOP*/;
+       do {
+               ulong now = get_timer_masked ();
+               diff = endtime - now;
+       } while (diff >= 0);
 #endif
 }