arch/tile: core support for Tilera 32-bit chips.

This change is the core kernel support for TILEPro and TILE64 chips.
No driver support (except the console driver) is included yet.

This includes the relevant Linux headers in asm/; the low-level
low-level "Tile architecture" headers in arch/, which are
shared with the hypervisor, etc., and are build-system agnostic;
and the relevant hypervisor headers in hv/.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reviewed-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/tile/include/asm/mmzone.h b/arch/tile/include/asm/mmzone.h
new file mode 100644
index 000000000000..c6344c4f32ac
--- /dev/null
+++ b/arch/tile/include/asm/mmzone.h
@@ -0,0 +1,81 @@
+/*
+ * 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_MMZONE_H
+#define _ASM_TILE_MMZONE_H
+
+extern struct pglist_data node_data[];
+#define NODE_DATA(nid)  (&node_data[nid])
+
+extern void get_memcfg_numa(void);
+
+#ifdef CONFIG_DISCONTIGMEM
+
+#include <asm/page.h>
+
+/*
+ * Generally, memory ranges are always doled out by the hypervisor in
+ * fixed-size, power-of-two increments.  That would make computing the node
+ * very easy.  We could just take a couple high bits of the PA, which
+ * denote the memory shim, and we'd be done.  However, when we're doing
+ * memory striping, this may not be true; PAs with different high bit
+ * values might be in the same node.  Thus, we keep a lookup table to
+ * translate the high bits of the PFN to the node number.
+ */
+extern int highbits_to_node[];
+
+static inline int pfn_to_nid(unsigned long pfn)
+{
+        return highbits_to_node[__pfn_to_highbits(pfn)];
+}
+
+/*
+ * Following are macros that each numa implmentation must define.
+ */
+
+#define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid)                                               \
+({                                                                      \
+        pg_data_t *__pgdat = NODE_DATA(nid);                            \
+        __pgdat->node_start_pfn + __pgdat->node_spanned_pages;          \
+})
+
+#define kern_addr_valid(kaddr)  virt_addr_valid((void *)kaddr)
+
+static inline int pfn_valid(int pfn)
+{
+        int nid = pfn_to_nid(pfn);
+
+        if (nid >= 0)
+                return (pfn < node_end_pfn(nid));
+        return 0;
+}
+
+/* Information on the NUMA nodes that we compute early */
+extern unsigned long node_start_pfn[];
+extern unsigned long node_end_pfn[];
+extern unsigned long node_memmap_pfn[];
+extern unsigned long node_percpu_pfn[];
+extern unsigned long node_free_pfn[];
+#ifdef CONFIG_HIGHMEM
+extern unsigned long node_lowmem_end_pfn[];
+#endif
+#ifdef CONFIG_PCI
+extern unsigned long pci_reserve_start_pfn;
+extern unsigned long pci_reserve_end_pfn;
+#endif
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#endif /* _ASM_TILE_MMZONE_H */