Remove CONFIG_PM dependency from au1x wait in cpu_probe.
Pete Popov [Thu, 7 Apr 2005 00:42:10 +0000 (00:42 +0000)]
Additional work necessary to completely remove that config option.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/au1000/common/power.c
arch/mips/au1000/common/time.c
arch/mips/kernel/cpu-probe.c

index c40dacc..d3aa067 100644 (file)
@@ -297,7 +297,6 @@ static int pm_do_suspend(ctl_table * ctl, int write, struct file *file,
                         void *buffer, size_t * len)
 {
        int retval = 0;
-       void    au1k_wait(void);
 
        if (!write) {
                *len = 0;
@@ -306,7 +305,7 @@ static int pm_do_suspend(ctl_table * ctl, int write, struct file *file,
                if (retval)
                        return retval;
                suspend_mode = 1;
-               au1k_wait();
+
                retval = pm_send_all(PM_RESUME, (void *) 0);
        }
        return retval;
index 90a0755..2bc3382 100644 (file)
@@ -57,7 +57,7 @@ unsigned long missed_heart_beats = 0;
 static unsigned long r4k_offset; /* Amount to increment compare reg each time */
 static unsigned long r4k_cur;    /* What counter should be at next timer irq */
 int    no_au1xxx_32khz;
-void   (*au1k_wait_ptr)(void);
+int allow_au1k_wait = 0; /* default off for CP0 Counter */
 
 /* Cycle counter value at the previous timer interrupt.. */
 static unsigned int timerhi = 0, timerlo = 0;
@@ -387,7 +387,6 @@ void au1xxx_timer_setup(struct irqaction *irq)
 {
         unsigned int est_freq;
        extern unsigned long (*do_gettimeoffset)(void);
-       extern void au1k_wait(void);
 
        printk("calculating r4koff... ");
        r4k_offset = cal_r4koff();
@@ -451,7 +450,7 @@ void au1xxx_timer_setup(struct irqaction *irq)
 
                /* We can use the real 'wait' instruction.
                */
-               au1k_wait_ptr = au1k_wait;
+               allow_au1k_wait = 1;
        }
 
 #else
index 66c2a27..b7c8346 100644 (file)
@@ -51,29 +51,25 @@ static void r4k_wait(void)
                ".set\tmips0");
 }
 
-/*
- * The Au1xxx wait is available only if we run CONFIG_PM and
- * the timer setup found we had a 32KHz counter available.
- * There are still problems with functions that may call au1k_wait
- * directly, but that will be discovered pretty quickly.
- */
-extern void (*au1k_wait_ptr)(void);
-
-void au1k_wait(void)
+/* The Au1xxx wait is available only if using 32khz counter or
+ * external timer source, but specifically not CP0 Counter. */
+static void au1k_wait(void)
 {
-#ifdef CONFIG_PM
+       unsigned long addr;
        /* using the wait instruction makes CP0 counter unusable */
-       __asm__(".set\tmips3\n\t"
+       __asm__("la %0,au1k_wait\n\t"
+               ".set mips3\n\t"
+               "cache 0x14,0(%0)\n\t"
+               "cache 0x14,32(%0)\n\t"
+               "sync\n\t"
+               "nop\n\t"
                "wait\n\t"
                "nop\n\t"
                "nop\n\t"
                "nop\n\t"
                "nop\n\t"
-               ".set\tmips0");
-#else
-       __asm__("nop\n\t"
-               "nop");
-#endif
+               ".set mips0\n\t"
+               : : "r" (addr));
 }
 
 static inline void check_wait(void)
@@ -112,21 +108,20 @@ static inline void check_wait(void)
                cpu_wait = r4k_wait;
                printk(" available.\n");
                break;
-#ifdef CONFIG_PM
        case CPU_AU1000:
        case CPU_AU1100:
        case CPU_AU1500:
        case CPU_AU1550:
        case CPU_AU1200:
-               if (au1k_wait_ptr != NULL) {
-                       cpu_wait = au1k_wait_ptr;
-                       printk(" available.\n");
-               }
-               else {
-                       printk(" unavailable.\n");
+               {
+                       extern int allow_au1k_wait; /* au1000/common/time.c */
+                       if (allow_au1k_wait) {
+                               cpu_wait = au1k_wait;
+                               printk(" available.\n");
+                       } else
+                               printk(" unavailable.\n");
                }
                break;
-#endif
        default:
                printk(" unavailable.\n");
                break;