| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_IOREMAP_H |
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| 3 | #define _LINUX_IOREMAP_H |
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| 4 | |
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| 5 | #include <linux/kasan.h> |
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| 6 | #include <asm/pgtable.h> |
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| 7 | #include <asm/vmalloc.h> |
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| 8 | |
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| 9 | #if defined(CONFIG_HAS_IOMEM) || defined(CONFIG_GENERIC_IOREMAP) |
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| 10 | /* |
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| 11 | * Ioremap often, but not always uses the generic vmalloc area. E.g on |
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| 12 | * Power ARCH, it could have different ioremap space. |
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| 13 | */ |
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| 14 | #ifndef IOREMAP_START |
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| 15 | #define IOREMAP_START VMALLOC_START |
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| 16 | #define IOREMAP_END VMALLOC_END |
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| 17 | #endif |
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| 18 | static inline bool is_ioremap_addr(const void *x) |
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| 19 | { |
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| 20 | unsigned long addr = (unsigned long)kasan_reset_tag(addr: x); |
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| 21 | |
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| 22 | return addr >= IOREMAP_START && addr < IOREMAP_END; |
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| 23 | } |
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| 24 | #else |
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| 25 | static inline bool is_ioremap_addr(const void *x) |
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| 26 | { |
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| 27 | return false; |
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| 28 | } |
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| 29 | #endif |
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| 30 | |
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| 31 | #endif /* _LINUX_IOREMAP_H */ |
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| 32 | |
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