Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / cpu / ppc4xx / xilinx_irq.c

diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/ppc4xx/xilinx_irq.c b/qemu/roms/u-boot/arch/powerpc/cpu/ppc4xx/xilinx_irq.c
new file mode 100644 (file)
index 0000000..71e1be0
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/cpu/ppc4xx/xilinx_irq.c
@@ -0,0 +1,89 @@
+/*
+ * (C) Copyright 2008
+ * Ricado Ribalda-Universidad Autonoma de Madrid-ricardo.ribalda@uam.es
+ * This work has been supported by: QTechnology  http://qtec.com/
+ * Based on interrupts.c Wolfgang Denk-DENX Software Engineering-wd@denx.de
+ * SPDX-License-Identifier:    GPL-2.0+
+*/
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/interrupt.h>
+#include <asm/ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <commproc.h>
+#include <asm/io.h>
+#include <asm/xilinx_irq.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void pic_enable(void)
+{
+       debug("Xilinx PIC at 0x%8x\n", intc);
+
+       /*
+        * Disable all external interrupts until they are
+        * explicitly requested.
+        */
+       out_be32((u32 *) IER, 0);
+
+       /* Acknowledge any pending interrupts just in case. */
+       out_be32((u32 *) IAR, 0xffffffff);
+
+       /* Turn on the Master Enable. */
+       out_be32((u32 *) MER, 0x3UL);
+
+       return;
+}
+
+int xilinx_pic_irq_get(void)
+{
+       u32 irq;
+       irq = in_be32((u32 *) IVR);
+
+       /* If no interrupt is pending then all bits of the IVR are set to 1. As
+        * the IVR is as many bits wide as numbers of inputs are available.
+        * Therefore, if all bits of the IVR are set to one, its content will
+        * be bigger than XPAR_INTC_MAX_NUM_INTR_INPUTS.
+        */
+       if (irq >= XPAR_INTC_MAX_NUM_INTR_INPUTS)
+               irq = -1;       /* report no pending interrupt. */
+
+       debug("get_irq: %d\n", irq);
+       return (irq);
+}
+
+void pic_irq_enable(unsigned int irq)
+{
+       u32 mask = IRQ_MASK(irq);
+       debug("enable: %d\n", irq);
+       out_be32((u32 *) SIE, mask);
+}
+
+void pic_irq_disable(unsigned int irq)
+{
+       u32 mask = IRQ_MASK(irq);
+       debug("disable: %d\n", irq);
+       out_be32((u32 *) CIE, mask);
+}
+
+void pic_irq_ack(unsigned int irq)
+{
+       u32 mask = IRQ_MASK(irq);
+       debug("ack: %d\n", irq);
+       out_be32((u32 *) IAR, mask);
+}
+
+void external_interrupt(struct pt_regs *regs)
+{
+       int irq;
+
+       irq = xilinx_pic_irq_get();
+       if (irq < 0)
+               return;
+
+       interrupt_run_handler(irq);
+
+       return;
+}