Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / cpu / mpc824x / interrupts.c

diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/mpc824x/interrupts.c b/qemu/roms/u-boot/arch/powerpc/cpu/mpc824x/interrupts.c
new file mode 100644 (file)
index 0000000..fad103f
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/cpu/mpc824x/interrupts.c
@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Rob Taylor, Flying Pig Systems. robt@flyingpig.com
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <mpc824x.h>
+#include <asm/processor.h>
+#include <asm/pci_io.h>
+#include <commproc.h>
+#include "drivers/epic.h"
+
+int interrupt_init_cpu (unsigned *decrementer_count)
+{
+       *decrementer_count = (get_bus_freq (0) / 4) / CONFIG_SYS_HZ;
+
+       /*
+        * It's all broken at the moment and I currently don't need
+        * interrupts. If you want to fix it, have a look at the epic
+        * drivers in dink32 v12. They do everthing and Motorola said
+        * I could use the dink source in this project as long as
+        * copyright notices remain intact.
+        */
+
+       epicInit (EPIC_DIRECT_IRQ, 0);
+       /* EPIC won't generate INT unless Current Task Pri < 15 */
+       epicCurTaskPrioSet(0);
+
+       return (0);
+}
+
+/****************************************************************************/
+
+/*
+ * Handle external interrupts
+ */
+void external_interrupt (struct pt_regs *regs)
+{
+       register unsigned long temp;
+
+       pci_readl (CONFIG_SYS_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp);
+       sync ();                                        /* i'm not convinced this is needed, but dink source has it */
+       temp &= 0xff;                           /*get vector */
+
+       /*TODO: handle them -... */
+       epicEOI ();
+}
+
+/****************************************************************************/
+
+/*
+ * blank int handlers.
+ */
+
+void
+irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
+{
+}
+
+void irq_free_handler (int vec)
+{
+
+}
+
+/*TODO: some handlers for winbond and 87308 interrupts
+ and what about generic pci inteerupts?
+ vga?
+ */
+
+void timer_interrupt_cpu (struct pt_regs *regs)
+{
+       /* nothing to do here */
+       return;
+}