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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2006-06-20 20:46:52 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-28 17:59:45 +0100
commit002547b4f86c27bfac5bae344b723d250857be6b (patch)
tree31fa2cc67091f7db95853ae089dee0261a5e98b5 /include/asm-arm/memory.h
parent60b6cf6851d0e12956c109987966f2e7417ce212 (diff)
[ARM] nommu: adjust headers for !MMU ARM systems
Majorily based on Hyok Choi's patches, this fixes up the asm-arm header files for mmuless systems. Over and above Hyok's patches: - nommu.h merged into mmu.h (it's only a structure) - nommu_context.h is essentially the same as mmu_context.h, but without the MM switching code. so there's no point having separate files. Also, in memory.h, there's no point #ifndef'ing PHYS_OFFSET and END_MEM - both CONFIG_DRAM_BASE and CONFIG_DRAM_SIZE will always be set by the configuration scripts. Other files have minor formatting changes, but are essentially the same. Hyok's original patches were signed off thusly: Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/memory.h')
-rw-r--r--include/asm-arm/memory.h75
1 files changed, 57 insertions, 18 deletions
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index 731e321a57d..94f973b704f 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -2,6 +2,7 @@
* linux/include/asm-arm/memory.h
*
* Copyright (C) 2000-2002 Russell King
+ * modification for nommu, Hyok S. Choi, 2004
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -26,6 +27,8 @@
#include <asm/arch/memory.h>
#include <asm/sizes.h>
+#ifdef CONFIG_MMU
+
#ifndef TASK_SIZE
/*
* TASK_SIZE - the maximum size of a user space task.
@@ -48,6 +51,60 @@
#endif
/*
+ * The module space lives between the addresses given by TASK_SIZE
+ * and PAGE_OFFSET - it must be within 32MB of the kernel text.
+ */
+#define MODULE_END (PAGE_OFFSET)
+#define MODULE_START (MODULE_END - 16*1048576)
+
+#if TASK_SIZE > MODULE_START
+#error Top of user space clashes with start of module space
+#endif
+
+/*
+ * The XIP kernel gets mapped at the bottom of the module vm area.
+ * Since we use sections to map it, this macro replaces the physical address
+ * with its virtual address while keeping offset from the base section.
+ */
+#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff))
+
+#else /* CONFIG_MMU */
+
+/*
+ * The limitation of user task size can grow up to the end of free ram region.
+ * It is difficult to define and perhaps will never meet the original meaning
+ * of this define that was meant to.
+ * Fortunately, there is no reference for this in noMMU mode, for now.
+ */
+#ifndef TASK_SIZE
+#define TASK_SIZE (CONFIG_DRAM_SIZE)
+#endif
+
+#ifndef TASK_UNMAPPED_BASE
+#define TASK_UNMAPPED_BASE UL(0x00000000)
+#endif
+
+#ifndef PHYS_OFFSET
+#define PHYS_OFFSET (CONFIG_DRAM_BASE)
+#endif
+
+#ifndef END_MEM
+#define END_MEM (CONFIG_DRAM_BASE + CONFIG_DRAM_SIZE)
+#endif
+
+#ifndef PAGE_OFFSET
+#define PAGE_OFFSET (PHYS_OFFSET)
+#endif
+
+/*
+ * The module can be at any place in ram in nommu mode.
+ */
+#define MODULE_END (END_MEM)
+#define MODULE_START (PHYS_OFFSET)
+
+#endif /* !CONFIG_MMU */
+
+/*
* Size of DMA-consistent memory region. Must be multiple of 2M,
* between 2MB and 14MB inclusive.
*/
@@ -71,24 +128,6 @@
#define __phys_to_pfn(paddr) ((paddr) >> PAGE_SHIFT)
#define __pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
-/*
- * The module space lives between the addresses given by TASK_SIZE
- * and PAGE_OFFSET - it must be within 32MB of the kernel text.
- */
-#define MODULE_END (PAGE_OFFSET)
-#define MODULE_START (MODULE_END - 16*1048576)
-
-#if TASK_SIZE > MODULE_START
-#error Top of user space clashes with start of module space
-#endif
-
-/*
- * The XIP kernel gets mapped at the bottom of the module vm area.
- * Since we use sections to map it, this macro replaces the physical address
- * with its virtual address while keeping offset from the base section.
- */
-#define XIP_VIRT_ADDR(physaddr) (MODULE_START + ((physaddr) & 0x000fffff))
-
#ifndef __ASSEMBLY__
/*