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sh: Store Queue API rework.

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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>
This commit is contained in:
Paul Mundt
2006-09-27 15:49:57 +09:00
parent 373e68b547
commit d7c30c682a
2 changed files with 261 additions and 324 deletions
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562
arch/sh/kernel/cpu/sh4/sq.c
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File diff suppressed because it is too large Load Diff

23
include/asm-sh/cpu-sh4/sq.h
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@@ -17,7 +17,7 @@
* 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)
@@ -26,23 +26,10 @@
#define SQ_QACR1 (P4SEG_REG_BASE + 0x3c)
#define SQ_ADDRMAX (P4SEG_STORE_QUE + 0x04000000)
struct sq_mapping {
const char *name;
unsigned long sq_addr;
unsigned long addr;
unsigned int size;
struct list_head list;
};
/* arch/sh/kernel/cpu/sh4/sq.c */
extern struct sq_mapping *sq_remap(unsigned long phys, unsigned int size, const char *name);
extern void sq_unmap(struct sq_mapping *map);
extern void sq_clear(unsigned long addr, unsigned int len);
extern void sq_flush(void *addr);
extern void sq_flush_range(unsigned long start, unsigned int len);
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 */