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, 279 insertions, 0 deletions

diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
new file mode 100644
index 000000000000..8c95bef3fa45
--- /dev/null
+++ b/arch/tile/include/asm/io.h
@@ -0,0 +1,279 @@
+/*
+ * 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_IO_H
+#define _ASM_TILE_IO_H
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <asm/page.h>
+
+#define IO_SPACE_LIMIT 0xfffffffful
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access.
+ */
+#define xlate_dev_mem_ptr(p)    __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer.
+ */
+#define xlate_dev_kmem_ptr(p)   p
+
+/*
+ * Change "struct page" to physical address.
+ */
+#define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
+
+/*
+ * Some places try to pass in an loff_t for PHYSADDR (?!), so we cast it to
+ * long before casting it to a pointer to avoid compiler warnings.
+ */
+#if CHIP_HAS_MMIO()
+extern void __iomem *ioremap(resource_size_t offset, unsigned long size);
+extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size,
+        pgprot_t pgprot);
+extern void iounmap(volatile void __iomem *addr);
+#else
+#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
+#define iounmap(addr)           ((void)0)
+#endif
+
+#define ioremap_nocache(physaddr, size)         ioremap(physaddr, size)
+#define ioremap_writethrough(physaddr, size)    ioremap(physaddr, size)
+#define ioremap_fullcache(physaddr, size)       ioremap(physaddr, size)
+
+void __iomem *ioport_map(unsigned long port, unsigned int len);
+extern inline void ioport_unmap(void __iomem *addr) {}
+
+#define mmiowb()
+
+/* Conversion between virtual and physical mappings.  */
+#define mm_ptov(addr)           ((void *)phys_to_virt(addr))
+#define mm_vtop(addr)           ((unsigned long)virt_to_phys(addr))
+
+#ifdef CONFIG_PCI
+
+extern u8 _tile_readb(unsigned long addr);
+extern u16 _tile_readw(unsigned long addr);
+extern u32 _tile_readl(unsigned long addr);
+extern u64 _tile_readq(unsigned long addr);
+extern void _tile_writeb(u8  val, unsigned long addr);
+extern void _tile_writew(u16 val, unsigned long addr);
+extern void _tile_writel(u32 val, unsigned long addr);
+extern void _tile_writeq(u64 val, unsigned long addr);
+
+#else
+
+/*
+ * The Tile architecture does not support IOMEM unless PCI is enabled.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int iomem_panic(void)
+{
+        panic("readb/writeb and friends do not exist on tile without PCI");
+        return 0;
+}
+
+static inline u8 _tile_readb(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u16 _tile_readw(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u32 _tile_readl(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline u64 _tile_readq(unsigned long addr)
+{
+        return iomem_panic();
+}
+
+static inline void _tile_writeb(u8  val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writew(u16 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writel(u32 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+static inline void _tile_writeq(u64 val, unsigned long addr)
+{
+        iomem_panic();
+}
+
+#endif
+
+#define readb(addr) _tile_readb((unsigned long)addr)
+#define readw(addr) _tile_readw((unsigned long)addr)
+#define readl(addr) _tile_readl((unsigned long)addr)
+#define readq(addr) _tile_readq((unsigned long)addr)
+#define writeb(val, addr) _tile_writeb(val, (unsigned long)addr)
+#define writew(val, addr) _tile_writew(val, (unsigned long)addr)
+#define writel(val, addr) _tile_writel(val, (unsigned long)addr)
+#define writeq(val, addr) _tile_writeq(val, (unsigned long)addr)
+
+#define __raw_readb readb
+#define __raw_readw readw
+#define __raw_readl readl
+#define __raw_readq readq
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+#define readb_relaxed readb
+#define readw_relaxed readw
+#define readl_relaxed readl
+#define readq_relaxed readq
+
+#define ioread8 readb
+#define ioread16 readw
+#define ioread32 readl
+#define ioread64 readq
+#define iowrite8 writeb
+#define iowrite16 writew
+#define iowrite32 writel
+#define iowrite64 writeq
+
+static inline void *memcpy_fromio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)src & 0x3);
+        for (x = 0; x < len; x += 4)
+                *(u32 *)(dst + x) = readl(src + x);
+        return dst;
+}
+
+static inline void *memcpy_toio(void *dst, void *src, int len)
+{
+        int x;
+        BUG_ON((unsigned long)dst & 0x3);
+        for (x = 0; x < len; x += 4)
+                writel(*(u32 *)(src + x), dst + x);
+        return dst;
+}
+
+/*
+ * The Tile architecture does not support IOPORT, even with PCI.
+ * Unfortunately we can't yet simply not declare these methods,
+ * since some generic code that compiles into the kernel, but
+ * we never run, uses them unconditionally.
+ */
+
+static inline int ioport_panic(void)
+{
+        panic("inb/outb and friends do not exist on tile");
+        return 0;
+}
+
+static inline u8 inb(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u16 inw(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline u32 inl(unsigned long addr)
+{
+        return ioport_panic();
+}
+
+static inline void outb(u8 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outw(u16 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+static inline void outl(u32 b, unsigned long addr)
+{
+        ioport_panic();
+}
+
+#define inb_p(addr)     inb(addr)
+#define inw_p(addr)     inw(addr)
+#define inl_p(addr)     inl(addr)
+#define outb_p(x, addr) outb((x), (addr))
+#define outw_p(x, addr) outw((x), (addr))
+#define outl_p(x, addr) outl((x), (addr))
+
+static inline void insb(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insw(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void insl(unsigned long addr, void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsb(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsw(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+static inline void outsl(unsigned long addr, const void *buffer, int count)
+{
+        ioport_panic();
+}
+
+#define ioread8_rep(p, dst, count) \
+        insb((unsigned long) (p), (dst), (count))
+#define ioread16_rep(p, dst, count) \
+        insw((unsigned long) (p), (dst), (count))
+#define ioread32_rep(p, dst, count) \
+        insl((unsigned long) (p), (dst), (count))
+
+#define iowrite8_rep(p, src, count) \
+        outsb((unsigned long) (p), (src), (count))
+#define iowrite16_rep(p, src, count) \
+        outsw((unsigned long) (p), (src), (count))
+#define iowrite32_rep(p, src, count) \
+        outsl((unsigned long) (p), (src), (count))
+
+#endif /* _ASM_TILE_IO_H */