31aa8fd6fd
This allows the procfs vmallocinfo file to show who created the ioremap regions. Note: __builtin_return_address(0) doesn't do what's expected if its used in an inline function, so we leave __arm_ioremap callers in such places alone. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
39 lines
1022 B
C
39 lines
1022 B
C
/*
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* DaVinci I/O mapping code
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*
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* Copyright (C) 2005-2006 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/io.h>
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#include <asm/tlb.h>
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#define BETWEEN(p, st, sz) ((p) >= (st) && (p) < ((st) + (sz)))
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#define XLATE(p, pst, vst) ((void __iomem *)((p) - (pst) + (vst)))
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/*
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* Intercept ioremap() requests for addresses in our fixed mapping regions.
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*/
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void __iomem *davinci_ioremap(unsigned long p, size_t size, unsigned int type)
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{
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if (BETWEEN(p, IO_PHYS, IO_SIZE))
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return XLATE(p, IO_PHYS, IO_VIRT);
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return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
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}
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EXPORT_SYMBOL(davinci_ioremap);
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void davinci_iounmap(volatile void __iomem *addr)
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{
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unsigned long virt = (unsigned long)addr;
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if (virt >= VMALLOC_START && virt < VMALLOC_END)
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__iounmap(addr);
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}
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EXPORT_SYMBOL(davinci_iounmap);
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