[RFC,XEN,16/23] riscv: Add irq.c

Commit Message

Bobby Eshleman Jan. 22, 2020, 1:58 a.m. UTC

From: Alistair Francis <[e-mail]>

Signed-off-by: Alistair Francis <[e-mail]>
---
 xen/arch/riscv/irq.c | 107 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 xen/arch/riscv/irq.c

Patch

diff --git a/xen/arch/riscv/irq.c b/xen/arch/riscv/irq.c
new file mode 100644
index 0000000000..d1b0b578de
--- /dev/null
+++ b/xen/arch/riscv/irq.c
@@ -0,0 +1,107 @@ 
+/*
+ * RISC-V Interrupt support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <xen/lib.h>
+#include <xen/spinlock.h>
+#include <xen/irq.h>
+#include <xen/init.h>
+#include <xen/errno.h>
+#include <xen/sched.h>
+
+const unsigned int nr_irqs = NR_IRQS;
+
+static void ack_none(struct irq_desc *irq)
+{
+    printk("unexpected IRQ trap at irq %02x\n", irq->irq);
+}
+
+static void end_none(struct irq_desc *irq)
+{
+    /* TODO */
+}
+
+hw_irq_controller no_irq_type = {
+    .typename = "none",
+    .startup = irq_startup_none,
+    .shutdown = irq_shutdown_none,
+    .enable = irq_enable_none,
+    .disable = irq_disable_none,
+    .ack = ack_none,
+    .end = end_none
+};
+
+static irq_desc_t irq_desc[NR_IRQS];
+static DEFINE_PER_CPU(irq_desc_t[NR_LOCAL_IRQS], local_irq_desc);
+
+int arch_init_one_irq_desc(struct irq_desc *desc)
+{
+    return 0;
+}
+
+struct pirq *alloc_pirq_struct(struct domain *d)
+{
+	/* TODO */
+
+    return NULL;
+}
+
+irq_desc_t *__irq_to_desc(int irq)
+{
+    if ( irq < NR_LOCAL_IRQS )
+        return &this_cpu(local_irq_desc)[irq];
+
+    return &irq_desc[irq-NR_LOCAL_IRQS];
+}
+
+int pirq_guest_bind(struct vcpu *v, struct pirq *pirq, int will_share)
+{
+    BUG();
+}
+
+void pirq_guest_unbind(struct domain *d, struct pirq *pirq)
+{
+    BUG();
+}
+
+void pirq_set_affinity(struct domain *d, int pirq, const cpumask_t *mask)
+{
+    BUG();
+}
+
+void smp_send_state_dump(unsigned int cpu)
+{
+    /* TODO */
+}
+
+void arch_move_irqs(struct vcpu *v)
+{
+    /* TODO */
+}
+
+int setup_irq(unsigned int irq, unsigned int irqflags, struct irqaction *new)
+{
+    int rc = 0;
+    unsigned long flags;
+    struct irq_desc *desc;
+
+    desc = irq_to_desc(irq);
+
+    spin_lock_irqsave(&desc->lock, flags);
+
+    /* TODO */
+
+    spin_unlock_irqrestore(&desc->lock, flags);
+
+    return rc;
+}