mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 08:34:20 +08:00
f23eab0bfa
Add hook for arm64's special operation when ioremap(), then ioremap_wc/np/cache is converted to use ioremap_prot() from GENERIC_IOREMAP, update the Copyright and kill the unused inclusions. Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Link: https://lore.kernel.org/r/20220607125027.44946-6-wangkefeng.wang@huawei.com Signed-off-by: Will Deacon <will@kernel.org>
36 lines
716 B
C
36 lines
716 B
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/io.h>
|
|
|
|
bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot)
|
|
{
|
|
unsigned long last_addr = phys_addr + size - 1;
|
|
|
|
/* Don't allow outside PHYS_MASK */
|
|
if (last_addr & ~PHYS_MASK)
|
|
return false;
|
|
|
|
/* Don't allow RAM to be mapped. */
|
|
if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr))))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Must be called after early_fixmap_init
|
|
*/
|
|
void __init early_ioremap_init(void)
|
|
{
|
|
early_ioremap_setup();
|
|
}
|
|
|
|
bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
|
|
unsigned long flags)
|
|
{
|
|
unsigned long pfn = PHYS_PFN(offset);
|
|
|
|
return pfn_is_map_memory(pfn);
|
|
}
|