linux/include/asm-sh/cpu-sh4/sq.h
Paul Mundt d7c30c682a sh: Store Queue API rework.
Rewrite the store queue API for a per-cpu interface in the driver
model. The old miscdevice is dropped, due to TASK_SIZE limitations,
and no one was using it anyways.

Carve up and allocate store queue space with a bitmap, back sq
mapping objects with a slab cache, and let userspace worry about
its own prefetching.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 15:49:57 +09:00

36 lines
1.2 KiB
C

/*
* include/asm-sh/cpu-sh4/sq.h
*
* Copyright (C) 2001, 2002, 2003 Paul Mundt
* Copyright (C) 2001, 2002 M. R. Brown
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef __ASM_CPU_SH4_SQ_H
#define __ASM_CPU_SH4_SQ_H
#include <asm/addrspace.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, unsigned long flags);
void sq_unmap(unsigned long vaddr);
void sq_flush_range(unsigned long start, unsigned int len);
#endif /* __ASM_CPU_SH4_SQ_H */