arch/mips/include/asm/mach-bcm63xx/ioremap.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/mach-bcm63xx/ioremap.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/mach-bcm63xx/ioremap.h
Extension
.h
Size
956 bytes
Lines
45
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source 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

#ifndef BCM63XX_IOREMAP_H_
#define BCM63XX_IOREMAP_H_

#include <bcm63xx_cpu.h>

static inline int is_bcm63xx_internal_registers(phys_addr_t offset)
{
	switch (bcm63xx_get_cpu_id()) {
	case BCM3368_CPU_ID:
		if (offset >= 0xfff80000)
			return 1;
		break;
	case BCM6338_CPU_ID:
	case BCM6345_CPU_ID:
	case BCM6348_CPU_ID:
	case BCM6358_CPU_ID:
		if (offset >= 0xfff00000)
			return 1;
		break;
	case BCM6328_CPU_ID:
	case BCM6362_CPU_ID:
	case BCM6368_CPU_ID:
		if (offset >= 0xb0000000 && offset < 0xb1000000)
			return 1;
		break;
	}
	return 0;
}

static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
					 unsigned long flags)
{
	if (is_bcm63xx_internal_registers(offset))
		return (void __iomem *)offset;
	return NULL;
}

static inline int plat_iounmap(const volatile void __iomem *addr)
{
	return is_bcm63xx_internal_registers((unsigned long)addr);
}

#endif /* BCM63XX_IOREMAP_H_ */

Annotation

Implementation Notes