X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Fx86%2Flib%2Finterrupts.c;fp=qemu%2Froms%2Fu-boot%2Farch%2Fx86%2Flib%2Finterrupts.c;h=6bb22d25e8d8edd69f880abb2469ed6b6232e750;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/arch/x86/lib/interrupts.c b/qemu/roms/u-boot/arch/x86/lib/interrupts.c
new file mode 100644
index 000000000..6bb22d25e
--- /dev/null
+++ b/qemu/roms/u-boot/arch/x86/lib/interrupts.c
@@ -0,0 +1,145 @@
+/*
+ * (C) Copyright 2009
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, <daniel@gaisler.com>
+ *
+ * (C) Copyright 2006
+ * Detlev Zundel, DENX Software Engineering, <dzu@denx.de>
+ *
+ * (C) Copyright -2003
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * (C) Copyright 2001
+ * Josh Huber, Mission Critical Linux, Inc, <huber@mclx.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * This file contains the high-level API for the interrupt sub-system
+ * of the x86 port of U-Boot. Most of the functionality has been
+ * shamelessly stolen from the leon2 / leon3 ports of U-Boot.
+ * Daniel Hellstrom, Detlev Zundel, Wolfgang Denk and Josh Huber are
+ * credited for the corresponding work on those ports. The original
+ * interrupt handling routines for the x86 port were written by
+ * Daniel Engström
+ */
+
+#include <common.h>
+#include <asm/interrupt.h>
+
+struct irq_action {
+	interrupt_handler_t *handler;
+	void *arg;
+	unsigned int count;
+};
+
+static struct irq_action irq_handlers[CONFIG_SYS_NUM_IRQS] = { {0} };
+static int spurious_irq_cnt;
+static int spurious_irq;
+
+void irq_install_handler(int irq, interrupt_handler_t *handler, void *arg)
+{
+	int status;
+
+	if (irq < 0 || irq >= CONFIG_SYS_NUM_IRQS) {
+		printf("irq_install_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	if (irq_handlers[irq].handler != NULL)
+		printf("irq_install_handler: 0x%08lx replacing 0x%08lx\n",
+				(ulong) handler,
+				(ulong) irq_handlers[irq].handler);
+
+	status = disable_interrupts();
+
+	irq_handlers[irq].handler = handler;
+	irq_handlers[irq].arg = arg;
+	irq_handlers[irq].count = 0;
+
+	unmask_irq(irq);
+
+	if (status)
+		enable_interrupts();
+
+	return;
+}
+
+void irq_free_handler(int irq)
+{
+	int status;
+
+	if (irq < 0 || irq >= CONFIG_SYS_NUM_IRQS) {
+		printf("irq_free_handler: bad irq number %d\n", irq);
+		return;
+	}
+
+	status = disable_interrupts();
+
+	mask_irq(irq);
+
+	irq_handlers[irq].handler = NULL;
+	irq_handlers[irq].arg = NULL;
+
+	if (status)
+		enable_interrupts();
+
+	return;
+}
+
+void do_irq(int hw_irq)
+{
+	int irq = hw_irq - 0x20;
+
+	if (irq < 0 || irq >= CONFIG_SYS_NUM_IRQS) {
+		printf("do_irq: bad irq number %d\n", irq);
+		return;
+	}
+
+	if (irq_handlers[irq].handler) {
+		mask_irq(irq);
+
+		irq_handlers[irq].handler(irq_handlers[irq].arg);
+		irq_handlers[irq].count++;
+
+		unmask_irq(irq);
+		specific_eoi(irq);
+
+	} else {
+		if ((irq & 7) != 7) {
+			spurious_irq_cnt++;
+			spurious_irq = irq;
+		}
+	}
+}
+
+#if defined(CONFIG_CMD_IRQ)
+int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	int irq;
+
+	printf("Spurious IRQ: %u, last unknown IRQ: %d\n",
+			spurious_irq_cnt, spurious_irq);
+
+	printf("Interrupt-Information:\n");
+	printf("Nr  Routine   Arg       Count\n");
+
+	for (irq = 0; irq <= CONFIG_SYS_NUM_IRQS; irq++) {
+		if (irq_handlers[irq].handler != NULL) {
+			printf("%02d  %08lx  %08lx  %d\n",
+					irq,
+					(ulong)irq_handlers[irq].handler,
+					(ulong)irq_handlers[irq].arg,
+					irq_handlers[irq].count);
+		}
+	}
+
+	return 0;
+}
+#endif