1 files changed, 147 insertions, 0 deletions

diff --git a/arch/tile/include/asm/smp.h b/arch/tile/include/asm/smp.h
new file mode 100644
index 00000000000..532124ae4b1
--- /dev/null
+++ b/arch/tile/include/asm/smp.h
@@ -0,0 +1,147 @@
+/*
+ * 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.
+ */
+
+#ifndef _ASM_TILE_SMP_H
+#define _ASM_TILE_SMP_H
+
+#ifdef CONFIG_SMP
+
+#include <asm/processor.h>
+#include <linux/cpumask.h>
+#include <linux/irqreturn.h>
+#include <hv/hypervisor.h>
+
+/* Set up this tile to support receiving hypervisor messages */
+void init_messaging(void);
+
+/* Set up this tile to support receiving device interrupts and IPIs. */
+void init_per_tile_IRQs(void);
+
+/* Send a message to processors specified in mask */
+void send_IPI_many(const struct cpumask *mask, int tag);
+
+/* Send a message to all but the sending processor */
+void send_IPI_allbutself(int tag);
+
+/* Send a message to a specific processor */
+void send_IPI_single(int dest, int tag);
+
+/* Process an IPI message */
+void evaluate_message(int tag);
+
+/* Boot a secondary cpu */
+void online_secondary(void);
+
+/* Call a function on a specified set of CPUs (may include this one). */
+extern void on_each_cpu_mask(const struct cpumask *mask,
+                             void (*func)(void *), void *info, bool wait);
+
+/* Topology of the supervisor tile grid, and coordinates of boot processor */
+extern HV_Topology smp_topology;
+
+/* Accessors for grid size */
+#define smp_height              (smp_topology.height)
+#define smp_width               (smp_topology.width)
+
+/* Convenience functions for converting cpu <-> coords. */
+static inline int cpu_x(int cpu)
+{
+        return cpu % smp_width;
+}
+static inline int cpu_y(int cpu)
+{
+        return cpu / smp_width;
+}
+static inline int xy_to_cpu(int x, int y)
+{
+        return y * smp_width + x;
+}
+
+/* Hypervisor message tags sent via the tile send_IPI*() routines. */
+#define MSG_TAG_START_CPU               1
+#define MSG_TAG_STOP_CPU                2
+#define MSG_TAG_CALL_FUNCTION_MANY      3
+#define MSG_TAG_CALL_FUNCTION_SINGLE    4
+
+/* Hook for the generic smp_call_function_many() routine. */
+static inline void arch_send_call_function_ipi_mask(struct cpumask *mask)
+{
+        send_IPI_many(mask, MSG_TAG_CALL_FUNCTION_MANY);
+}
+
+/* Hook for the generic smp_call_function_single() routine. */
+static inline void arch_send_call_function_single_ipi(int cpu)
+{
+        send_IPI_single(cpu, MSG_TAG_CALL_FUNCTION_SINGLE);
+}
+
+/* Print out the boot string describing which cpus were disabled. */
+void print_disabled_cpus(void);
+
+#else /* !CONFIG_SMP */
+
+#define on_each_cpu_mask(mask, func, info, wait)                \
+  do { if (cpumask_test_cpu(0, (mask))) func(info); } while (0)
+
+#define smp_master_cpu          0
+#define smp_height              1
+#define smp_width               1
+#define cpu_x(cpu)              0
+#define cpu_y(cpu)              0
+#define xy_to_cpu(x, y)         0
+
+#endif /* !CONFIG_SMP */
+
+
+/* Which cpus may be used as the lotar in a page table entry. */
+extern struct cpumask cpu_lotar_map;
+#define cpu_is_valid_lotar(cpu) cpumask_test_cpu((cpu), &cpu_lotar_map)
+
+#if CHIP_HAS_CBOX_HOME_MAP()
+/* Which processors are used for hash-for-home mapping */
+extern struct cpumask hash_for_home_map;
+#endif
+
+/* Which cpus can have their cache flushed by hv_flush_remote(). */
+extern struct cpumask cpu_cacheable_map;
+#define cpu_cacheable(cpu) cpumask_test_cpu((cpu), &cpu_cacheable_map)
+
+/* Convert an HV_LOTAR value into a cpu. */
+static inline int hv_lotar_to_cpu(HV_LOTAR lotar)
+{
+        return HV_LOTAR_X(lotar) + (HV_LOTAR_Y(lotar) * smp_width);
+}
+
+/*
+ * Extension of <linux/cpumask.h> functionality when you just want
+ * to express a mask or suppression or inclusion region without
+ * being too concerned about exactly which cpus are valid in that region.
+ */
+int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits);
+
+#define cpulist_parse_crop(buf, dst) \
+                        __cpulist_parse_crop((buf), (dst), NR_CPUS)
+static inline int __cpulist_parse_crop(const char *buf, struct cpumask *dstp,
+                                        int nbits)
+{
+        return bitmap_parselist_crop(buf, cpumask_bits(dstp), nbits);
+}
+
+/* Initialize the IPI subsystem. */
+void ipi_init(void);
+
+/* Function for start-cpu message to cause us to jump to. */
+extern unsigned long start_cpu_function_addr;
+
+#endif /* _ASM_TILE_SMP_H */