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-rw-r--r--arch/tile/kernel/messaging.c115
1 files changed, 0 insertions, 115 deletions
diff --git a/arch/tile/kernel/messaging.c b/arch/tile/kernel/messaging.c
deleted file mode 100644
index 7475af3aacec..000000000000
--- a/arch/tile/kernel/messaging.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * 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, version 2.
- *
- * 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, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/percpu.h>
-#include <linux/smp.h>
-#include <linux/hardirq.h>
-#include <linux/ptrace.h>
-#include <asm/hv_driver.h>
-#include <asm/irq_regs.h>
-#include <asm/traps.h>
-#include <hv/hypervisor.h>
-#include <arch/interrupts.h>
-
-/* All messages are stored here */
-static DEFINE_PER_CPU(HV_MsgState, msg_state);
-
-void init_messaging(void)
-{
- /* Allocate storage for messages in kernel space */
- HV_MsgState *state = this_cpu_ptr(&msg_state);
- int rc = hv_register_message_state(state);
- if (rc != HV_OK)
- panic("hv_register_message_state: error %d", rc);
-
- /* Make sure downcall interrupts will be enabled. */
- arch_local_irq_unmask(INT_INTCTRL_K);
-}
-
-void hv_message_intr(struct pt_regs *regs, int intnum)
-{
- /*
- * We enter with interrupts disabled and leave them disabled,
- * to match expectations of called functions (e.g.
- * do_ccupdate_local() in mm/slab.c). This is also consistent
- * with normal call entry for device interrupts.
- */
-
- int message[HV_MAX_MESSAGE_SIZE/sizeof(int)];
- HV_RcvMsgInfo rmi;
- int nmsgs = 0;
-
- /* Track time spent here in an interrupt context */
- struct pt_regs *old_regs = set_irq_regs(regs);
- irq_enter();
-
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
- /* Debugging check for stack overflow: less than 1/8th stack free? */
- {
- long sp = stack_pointer - (long) current_thread_info();
- if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
- pr_emerg("%s: stack overflow: %ld\n",
- __func__, sp - sizeof(struct thread_info));
- dump_stack();
- }
- }
-#endif
-
- while (1) {
- HV_MsgState *state = this_cpu_ptr(&msg_state);
- rmi = hv_receive_message(*state, (HV_VirtAddr) message,
- sizeof(message));
- if (rmi.msglen == 0)
- break;
-
- if (rmi.msglen < 0)
- panic("hv_receive_message failed: %d", rmi.msglen);
-
- ++nmsgs;
-
- if (rmi.source == HV_MSG_TILE) {
- int tag;
-
- /* we just send tags for now */
- BUG_ON(rmi.msglen != sizeof(int));
-
- tag = message[0];
-#ifdef CONFIG_SMP
- evaluate_message(message[0]);
-#else
- panic("Received IPI message %d in UP mode", tag);
-#endif
- } else if (rmi.source == HV_MSG_INTR) {
- HV_IntrMsg *him = (HV_IntrMsg *)message;
- struct hv_driver_cb *cb =
- (struct hv_driver_cb *)him->intarg;
- cb->callback(cb, him->intdata);
- __this_cpu_inc(irq_stat.irq_hv_msg_count);
- }
- }
-
- /*
- * We shouldn't have gotten a message downcall with no
- * messages available.
- */
- if (nmsgs == 0)
- panic("Message downcall invoked with no messages!");
-
- /*
- * Track time spent against the current process again and
- * process any softirqs if they are waiting.
- */
- irq_exit();
- set_irq_regs(old_regs);
-}