arch/sh/include/cpu-sh4/cpu/sq.h

Source file repositories/reference/linux-study-clean/arch/sh/include/cpu-sh4/cpu/sq.h

File Facts

System
Linux kernel
Corpus path
arch/sh/include/cpu-sh4/cpu/sq.h
Extension
.h
Size
1078 bytes
Lines
34
Domain
Architecture Layer
Bucket
arch/sh
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 __ASM_CPU_SH4_SQ_H
#define __ASM_CPU_SH4_SQ_H

#include <asm/addrspace.h>
#include <asm/page.h>

/*
 * Store queues range from e0000000-e3fffffc, allowing approx. 64MB to be
 * mapped to any physical address space. Since data is written (and aligned)
 * to 32-byte boundaries, we need to be sure that all allocations are aligned.
 */
#define SQ_SIZE                 32
#define SQ_ALIGN_MASK           (~(SQ_SIZE - 1))
#define SQ_ALIGN(addr)          (((addr)+SQ_SIZE-1) & SQ_ALIGN_MASK)

#define SQ_QACR0		(P4SEG_REG_BASE  + 0x38)
#define SQ_QACR1		(P4SEG_REG_BASE  + 0x3c)
#define SQ_ADDRMAX              (P4SEG_STORE_QUE + 0x04000000)

/* arch/sh/kernel/cpu/sh4/sq.c */
unsigned long sq_remap(unsigned long phys, unsigned int size,
		       const char *name, pgprot_t prot);
void sq_unmap(unsigned long vaddr);
void sq_flush_range(unsigned long start, unsigned int len);

#endif /* __ASM_CPU_SH4_SQ_H */

Annotation

Implementation Notes