Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\mtrr\mtrr.c Create Date:2022-07-28 08:05:13
Last Modify:2022-05-18 17:35:08 Copyright©Brick
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Name:arch_phys_wc_add - add a WC MTRR and handle errors if PAT is unavailable*@base: Physical base address*@size: Size of region* If PAT is available, this does nothing

Proto:int arch_phys_wc_add(unsigned long base, unsigned long size)

Type:int

Parameter:

TypeParameterName
unsigned longbase
unsigned longsize
571  If pat_enabled() || Not mtrr_enabled() Then Return 0
574  ret = mtrr_add - Add a memory type region*@base: Physical base address of region*@size: Physical size of region*@type: Type of MTRR desired*@increment: If this is true do usage counting on the region* Memory type region registers control the caching on newer
575  If ret < 0 Then
576  pr_warn("Failed to add WC MTRR for [%p-%p]; performance may suffer.", (void * )base, (void * )(base + size - 1))
578  Return ret
580  Return ret + arch_phys_wc_add returns an MTRR register index plus this offset.