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Date: Wed, 18 Mar 2009 21:30:57 +0100
From: monstr@...str.eu
To: linux-kernel@...r.kernel.org
Cc: john.williams@...alogix.com, Michal Simek <monstr@...str.eu>
Subject: [PATCH 30/57] microblaze_v7: page.h, segment.h, unaligned.h
From: Michal Simek <monstr@...str.eu>
Signed-off-by: Michal Simek <monstr@...str.eu>
---
arch/microblaze/include/asm/page.h | 139 +++++++++++++++++++++++++++++++
arch/microblaze/include/asm/segment.h | 43 ++++++++++
arch/microblaze/include/asm/unaligned.h | 22 +++++
3 files changed, 204 insertions(+), 0 deletions(-)
create mode 100644 arch/microblaze/include/asm/page.h
create mode 100644 arch/microblaze/include/asm/segment.h
create mode 100644 arch/microblaze/include/asm/unaligned.h
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
new file mode 100644
index 0000000..15db1ea
--- /dev/null
+++ b/arch/microblaze/include/asm/page.h
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2008 Michal Simek
+ * Copyright (C) 2008 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ * Changes for MMU support:
+ * Copyright (C) 2007 Xilinx, Inc. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_PAGE_H
+#define _ASM_MICROBLAZE_PAGE_H
+
+#include <linux/pfn.h>
+#include <asm/setup.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT (12)
+#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
+#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
+
+/* align addr on a size boundary - adjust address up/down if needed */
+#define _ALIGN_UP(addr, size) (((addr)+((size)-1))&(~((size)-1)))
+#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
+
+/* align addr on a size boundary - adjust address up if needed */
+#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
+
+/*
+ * PAGE_OFFSET -- the first address of the first page of memory. When not
+ * using MMU this corresponds to the first free page in physical memory (aligned
+ * on a page boundary).
+ */
+extern unsigned int __page_offset;
+#define PAGE_OFFSET __page_offset
+
+#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
+#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr) free_page(addr)
+
+#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
+
+
+#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
+#define copy_user_page(vto, vfrom, vaddr, topg) \
+ memcpy((vto), (vfrom), PAGE_SIZE)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct page *pgtable_t;
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct { unsigned long ste[64]; } pmd_t;
+typedef struct { pmd_t pue[1]; } pud_t;
+typedef struct { pud_t pge[1]; } pgd_t;
+
+
+#define pte_val(x) ((x).pte)
+#define pgprot_val(x) ((x).pgprot)
+#define pmd_val(x) ((x).ste[0])
+#define pud_val(x) ((x).pue[0])
+#define pgd_val(x) ((x).pge[0])
+
+#define __pte(x) ((pte_t) { (x) })
+#define __pmd(x) ((pmd_t) { (x) })
+#define __pgd(x) ((pgd_t) { (x) })
+#define __pgprot(x) ((pgprot_t) { (x) })
+
+/**
+ * Conversions for virtual address, physical address, pfn, and struct
+ * page are defined in the following files.
+ *
+ * virt -+
+ * | asm-microblaze/page.h
+ * phys -+
+ * | linux/pfn.h
+ * pfn -+
+ * | asm-generic/memory_model.h
+ * page -+
+ *
+ */
+
+extern unsigned long max_low_pfn;
+extern unsigned long min_low_pfn;
+extern unsigned long max_pfn;
+
+#define __pa(vaddr) ((unsigned long) (vaddr))
+#define __va(paddr) ((void *) (paddr))
+
+#define phys_to_pfn(phys) (PFN_DOWN(phys))
+#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
+
+#define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
+#define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
+
+#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
+#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
+
+#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
+#define page_to_bus(page) (page_to_phys(page))
+#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
+
+extern unsigned int memory_start;
+extern unsigned int memory_end;
+extern unsigned int memory_size;
+
+#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_mapnr)
+
+#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
+
+#endif /* __ASSEMBLY__ */
+
+#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
+
+/* Convert between virtual and physical address for MMU. */
+/* Handle MicroBlaze processor with virtual memory. */
+#define __virt_to_phys(addr) addr
+#define __phys_to_virt(addr) addr
+#define tophys(rd,rs) addik rd,rs,0
+#define tovirt(rd,rs) addik rd,rs,0
+
+#define TOPHYS(addr) __virt_to_phys(addr)
+
+#endif /* __KERNEL__ */
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#endif /* _ASM_MICROBLAZE_PAGE_H */
diff --git a/arch/microblaze/include/asm/segment.h b/arch/microblaze/include/asm/segment.h
new file mode 100644
index 0000000..7f5dcc5
--- /dev/null
+++ b/arch/microblaze/include/asm/segment.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2008 Michal Simek
+ * Copyright (C) 2008 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_SEGMENT_H
+#define _ASM_MICROBLAZE_SEGMENT_H
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+/*
+ * On Microblaze the fs value is actually the top of the corresponding
+ * address space.
+ *
+ * The fs value determines whether argument validity checking should be
+ * performed or not. If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ *
+ * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
+ */
+# define KERNEL_DS ((mm_segment_t){0})
+# define USER_DS KERNEL_DS
+
+# define get_ds() (KERNEL_DS)
+# define get_fs() (current_thread_info()->addr_limit)
+# define set_fs(x) \
+ do { current_thread_info()->addr_limit = (x); } while (0)
+
+# define segment_eq(a, b) ((a).seg == (b).seg)
+
+# endif /* __ASSEMBLY__ */
+#endif /* _ASM_MICROBLAZE_SEGMENT_H */
diff --git a/arch/microblaze/include/asm/unaligned.h b/arch/microblaze/include/asm/unaligned.h
new file mode 100644
index 0000000..9d66b64
--- /dev/null
+++ b/arch/microblaze/include/asm/unaligned.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2008 Michal Simek <monstr@...str.eu>
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_UNALIGNED_H
+#define _ASM_MICROBLAZE_UNALIGNED_H
+
+# ifdef __KERNEL__
+
+# include <linux/unaligned/access_ok.h>
+# include <linux/unaligned/generic.h>
+
+# define get_unaligned __get_unaligned_be
+# define put_unaligned __put_unaligned_be
+
+# endif /* __KERNEL__ */
+#endif /* _ASM_MICROBLAZE_UNALIGNED_H */
--
1.5.5.1
--
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