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linux-7.2.3/arch/mips/loongson2ef/fuloong-2e/Makefile

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+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Lemote Fuloong2e mini-PC board.
+#
+
+obj-y += irq.o reset.o dma.o

linux-7.2.3/arch/mips/loongson2ef/fuloong-2e/dma.c

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+// SPDX-License-Identifier: GPL-2.0
+#include <linux/dma-direct.h>
+
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+	return paddr | 0x80000000;
+}
+
+phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
+{
+	return dma_addr & 0x7fffffff;
+}

linux-7.2.3/arch/mips/loongson2ef/fuloong-2e/irq.c

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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ */
+#include <linux/interrupt.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/i8259.h>
+
+#include <loongson.h>
+
+static void i8259_irqdispatch(void)
+{
+	int irq;
+
+	irq = i8259_irq();
+	if (irq >= 0)
+		do_IRQ(irq);
+	else
+		spurious_interrupt();
+}
+
+asmlinkage void mach_irq_dispatch(unsigned int pending)
+{
+	if (pending & CAUSEF_IP7)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+	else if (pending & CAUSEF_IP6) /* perf counter loverflow */
+		return;
+	else if (pending & CAUSEF_IP5)
+		i8259_irqdispatch();
+	else if (pending & CAUSEF_IP2)
+		bonito_irqdispatch();
+	else
+		spurious_interrupt();
+}
+
+void __init mach_init_irq(void)
+{
+	int irq;
+
+	/* init all controller
+	 *   0-15	  ------> i8259 interrupt
+	 *   16-23	  ------> mips cpu interrupt
+	 *   32-63	  ------> bonito irq
+	 */
+
+	/* most bonito irq should be level triggered */
+	LOONGSON_INTEDGE = LOONGSON_ICU_SYSTEMERR | LOONGSON_ICU_MASTERERR |
+	    LOONGSON_ICU_RETRYERR | LOONGSON_ICU_MBOXES;
+
+	/* Sets the first-level interrupt dispatcher. */
+	mips_cpu_irq_init();
+	init_i8259_irqs();
+	bonito_irq_init();
+
+	/* bonito irq at IP2 */
+	irq = MIPS_CPU_IRQ_BASE + 2;
+	if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL))
+		pr_err("Failed to request irq %d (cascade)\n", irq);
+	/* 8259 irq at IP5 */
+	irq = MIPS_CPU_IRQ_BASE + 5;
+	if (request_irq(irq, no_action, IRQF_NO_THREAD, "cascade", NULL))
+		pr_err("Failed to request irq %d (cascade)\n", irq);
+}

linux-7.2.3/arch/mips/loongson2ef/fuloong-2e/reset.c

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+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Board-specific reboot/shutdown routines
+ * Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzhangjin@gmail.com
+ */
+
+#include <loongson.h>
+
+void mach_prepare_reboot(void)
+{
+	LOONGSON_GENCFG &= ~(1 << 2);
+	LOONGSON_GENCFG |= (1 << 2);
+}
+
+void mach_prepare_shutdown(void)
+{
+}