a05e54c103
In 32-bit ARM systems, the fixmap mapping region can support no more than 14 CPUs(total: 896k; one CPU: 64K). And we can configure NR_CPUS up to 32. So there is a mismatch. This patch moves fixmapping region downwards to region 0xffc00000- 0xffe00000. Then the fixmap mapping region can support up to 32 CPUs. Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Liu Hua <sdu.liu@huawei.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
28 lines
724 B
C
28 lines
724 B
C
#ifndef _ASM_FIXMAP_H
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#define _ASM_FIXMAP_H
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#define FIXADDR_START 0xffc00000UL
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#define FIXADDR_TOP 0xffe00000UL
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#define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START)
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#define FIX_KMAP_NR_PTES (FIXADDR_SIZE >> PAGE_SHIFT)
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#define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT))
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#define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT)
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extern void __this_fixmap_does_not_exist(void);
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static inline unsigned long fix_to_virt(const unsigned int idx)
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{
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if (idx >= FIX_KMAP_NR_PTES)
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__this_fixmap_does_not_exist();
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return __fix_to_virt(idx);
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}
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static inline unsigned int virt_to_fix(const unsigned long vaddr)
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{
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BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
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return __virt_to_fix(vaddr);
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}
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#endif
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