arch/mips/mm/ioremap64.c

Source file repositories/reference/linux-study-clean/arch/mips/mm/ioremap64.c

File Facts

System
Linux kernel
Corpus path
arch/mips/mm/ioremap64.c
Extension
.c
Size
570 bytes
Lines
24
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/io.h>
#include <ioremap.h>

void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
			   pgprot_t prot)
{
	unsigned long flags = pgprot_val(prot) & _CACHE_MASK;
	u64 base = (flags == _CACHE_UNCACHED ? IO_BASE : UNCAC_BASE);
	void __iomem *addr;

	addr = plat_ioremap(offset, size, flags);
	if (!addr)
		addr = (void __iomem *)(unsigned long)(base + offset);
	return addr;
}
EXPORT_SYMBOL(ioremap_prot);

void iounmap(const volatile void __iomem *addr)
{
	plat_iounmap(addr);
}
EXPORT_SYMBOL(iounmap);

Annotation

Implementation Notes