Add qemu 2.4.0

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

diff --git a/qemu/roms/u-boot/arch/sparc/lib/interrupts.c b/qemu/roms/u-boot/arch/sparc/lib/interrupts.c
new file mode 100644 (file)
index 0000000..b7c3993
--- /dev/null
+++ b/qemu/roms/u-boot/arch/sparc/lib/interrupts.c
@@ -0,0 +1,96 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003
+ * Gleb Natapov <gnatapov@mrv.com>
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+
+/* Implemented by SPARC CPUs */
+extern int interrupt_init_cpu(void);
+extern void timer_interrupt_cpu(void *arg);
+extern int timer_interrupt_init_cpu(void);
+
+int intLock(void)
+{
+       unsigned int pil;
+
+       pil = get_pil();
+
+       /* set PIL to 15 ==> no pending interrupts will interrupt CPU */
+       set_pil(15);
+
+       return pil;
+}
+
+void intUnlock(int oldLevel)
+{
+       set_pil(oldLevel);
+}
+
+void enable_interrupts(void)
+{
+       set_pil(0);             /* enable all interrupts */
+}
+
+int disable_interrupts(void)
+{
+       return intLock();
+}
+
+int interrupt_init(void)
+{
+       int ret;
+
+       /* call cpu specific function from $(CPU)/interrupts.c */
+       ret = interrupt_init_cpu();
+
+       /* enable global interrupts */
+       enable_interrupts();
+
+       return ret;
+}
+
+/* timer interrupt/overflow counter */
+static volatile ulong timestamp = 0;
+
+/* regs can not be used here! regs is actually the pointer given in
+ * irq_install_handler
+ */
+void timer_interrupt(struct pt_regs *regs)
+{
+       /* call cpu specific function from $(CPU)/interrupts.c */
+       timer_interrupt_cpu((void *)regs);
+
+       timestamp++;
+}
+
+ulong get_timer(ulong base)
+{
+       return (timestamp - base);
+}
+
+void timer_interrupt_init(void)
+{
+       int irq;
+
+       timestamp = 0;
+
+       irq = timer_interrupt_init_cpu();
+
+       if (irq < 0) {
+               /* cpu specific code handled the interrupt registration it self */
+               return;
+       }
+       /* register interrupt handler for timer */
+       irq_install_handler(irq, (void (*)(void *))timer_interrupt, NULL);
+}