Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / lib / interrupts.c

diff --git a/qemu/roms/u-boot/arch/powerpc/lib/interrupts.c b/qemu/roms/u-boot/arch/powerpc/lib/interrupts.c
new file mode 100644 (file)
index 0000000..f7cf915
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/lib/interrupts.c
@@ -0,0 +1,127 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003
+ * Gleb Natapov <gnatapov@mrv.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <watchdog.h>
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+
+#ifdef CONFIG_SHOW_ACTIVITY
+void board_show_activity (ulong) __attribute__((weak, alias("__board_show_activity")));
+
+void __board_show_activity (ulong dummy)
+{
+       return;
+}
+#endif /* CONFIG_SHOW_ACTIVITY */
+
+#ifndef CONFIG_SYS_WATCHDOG_FREQ
+#define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2)
+#endif
+
+extern int interrupt_init_cpu (unsigned *);
+extern void timer_interrupt_cpu (struct pt_regs *);
+
+static unsigned decrementer_count; /* count value for 1e6/HZ microseconds */
+
+static __inline__ unsigned long get_msr (void)
+{
+       unsigned long msr;
+
+       asm volatile ("mfmsr %0":"=r" (msr):);
+
+       return msr;
+}
+
+static __inline__ void set_msr (unsigned long msr)
+{
+       asm volatile ("mtmsr %0"::"r" (msr));
+}
+
+static __inline__ unsigned long get_dec (void)
+{
+       unsigned long val;
+
+       asm volatile ("mfdec %0":"=r" (val):);
+
+       return val;
+}
+
+
+static __inline__ void set_dec (unsigned long val)
+{
+       if (val)
+               asm volatile ("mtdec %0"::"r" (val));
+}
+
+
+void enable_interrupts (void)
+{
+       set_msr (get_msr () | MSR_EE);
+}
+
+/* returns flag if MSR_EE was set before */
+int disable_interrupts (void)
+{
+       ulong msr = get_msr ();
+
+       set_msr (msr & ~MSR_EE);
+       return ((msr & MSR_EE) != 0);
+}
+
+int interrupt_init (void)
+{
+       int ret;
+
+       /* call cpu specific function from $(CPU)/interrupts.c */
+       ret = interrupt_init_cpu (&decrementer_count);
+
+       if (ret)
+               return ret;
+
+       set_dec (decrementer_count);
+
+       set_msr (get_msr () | MSR_EE);
+
+       return (0);
+}
+
+static volatile ulong timestamp = 0;
+
+void timer_interrupt (struct pt_regs *regs)
+{
+       /* call cpu specific function from $(CPU)/interrupts.c */
+       timer_interrupt_cpu (regs);
+
+       /* Restore Decrementer Count */
+       set_dec (decrementer_count);
+
+       timestamp++;
+
+#if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG)
+       if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0)
+               WATCHDOG_RESET ();
+#endif    /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */
+
+#ifdef CONFIG_STATUS_LED
+       status_led_tick (timestamp);
+#endif /* CONFIG_STATUS_LED */
+
+#ifdef CONFIG_SHOW_ACTIVITY
+       board_show_activity (timestamp);
+#endif /* CONFIG_SHOW_ACTIVITY */
+}
+
+ulong get_timer (ulong base)
+{
+       return (timestamp - base);
+}