rt-thread-official/libcpu/mips/common/cache.h

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2013-01-08 21:05:02 +08:00
/*
* Cache operations for the cache instruction.
*
* 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.
*
* (C) Copyright 1996, 97, 99, 2002, 03 Ralf Baechle
* (C) Copyright 1999 Silicon Graphics, Inc.
*/
#ifndef __CACHE_H__
#define __CACHE_H__
#define KUSEG 0x00000000
#define KSEG0 0x80000000
#define KSEG1 0xa0000000
#define KSEG2 0xc0000000
#define KSEG3 0xe0000000
/*
* Cache Operations available on all MIPS processors with R4000-style caches
*/
#define Index_Invalidate_I 0x00
#define Index_Writeback_Inv_D 0x01
#define Index_Load_Tag_I 0x04
#define Index_Load_Tag_D 0x05
#define Index_Store_Tag_I 0x08
#define Index_Store_Tag_D 0x09
#define Hit_Invalidate_I 0x10
#define Hit_Invalidate_D 0x11
#define Hit_Writeback_Inv_D 0x15
#define Hit_Writeback_I 0x18
#define Hit_Writeback_D 0x19
/*
*The lock state is cleared by executing an Index
Invalidate, Index Writeback Invalidate, Hit
Invalidate, or Hit Writeback Invalidate
operation to the locked line, or via an Index
Store Tag operation with the lock bit reset in
the TagLo register.
*/
#define Fetch_And_Lock_I 0x1c
#define Fetch_And_Lock_D 0x1d
/*
* R4000-specific cacheops
*/
#define Create_Dirty_Excl_D 0x0d
#define Fill 0x14
/*
* R4000SC and R4400SC-specific cacheops
*/
#define Index_Invalidate_SI 0x02
#define Index_Writeback_Inv_SD 0x03
#define Index_Load_Tag_SI 0x06
#define Index_Load_Tag_SD 0x07
#define Index_Store_Tag_SI 0x0A
#define Index_Store_Tag_SD 0x0B
#define Create_Dirty_Excl_SD 0x0f
#define Hit_Invalidate_SI 0x12
#define Hit_Invalidate_SD 0x13
#define Hit_Writeback_Inv_SD 0x17
#define Hit_Writeback_SD 0x1b
#define Hit_Set_Virtual_SI 0x1e
#define Hit_Set_Virtual_SD 0x1f
/*
* R5000-specific cacheops
*/
#define R5K_Page_Invalidate_S 0x17
/*
* RM7000-specific cacheops
*/
#define Page_Invalidate_T 0x16
/*
* R1000-specific cacheops
*
* Cacheops 0x02, 0x06, 0x0a, 0x0c-0x0e, 0x16, 0x1a and 0x1e are unused.
* Most of the _S cacheops are identical to the R4000SC _SD cacheops.
*/
#define Index_Writeback_Inv_S 0x03
#define Index_Load_Tag_S 0x07
#define Index_Store_Tag_S 0x0B
#define Hit_Invalidate_S 0x13
#define Cache_Barrier 0x14
#define Hit_Writeback_Inv_S 0x17
#define Index_Load_Data_I 0x18
#define Index_Load_Data_D 0x19
#define Index_Load_Data_S 0x1b
#define Index_Store_Data_I 0x1c
#define Index_Store_Data_D 0x1d
#define Index_Store_Data_S 0x1f
#ifndef __ASSEMBLER__
#ifndef dcache_size
#define dcache_size (g_mips_core.dcache_ways * g_mips_core.dcache_lines_per_way * g_mips_core.dcache_line_size)
#endif
#ifndef icache_size
#define icache_size (g_mips_core.dcache_ways * g_mips_core.dcache_lines_per_way * g_mips_core.dcache_line_size)
#endif
#ifndef cpu_dcache_line_size
#define cpu_dcache_line_size() g_mips_core.icache_line_size
#endif
#ifndef cpu_icache_line_size
#define cpu_icache_line_size() g_mips_core.icache_line_size
#endif
#define cache_op(op, addr) \
__asm__ __volatile__( \
" .set noreorder \n" \
" .set mips3\n\t \n" \
" cache %0, %1 \n" \
" .set mips0 \n" \
" .set reorder" \
: \
: "i" (op), "m" (*(unsigned char *)(addr)))
#define cache16_unroll32(base, op) \
__asm__ __volatile__( \
" .set noreorder \n" \
" .set mips3 \n" \
" cache %1, 0x000(%0); cache %1, 0x010(%0) \n" \
" cache %1, 0x020(%0); cache %1, 0x030(%0) \n" \
" cache %1, 0x040(%0); cache %1, 0x050(%0) \n" \
" cache %1, 0x060(%0); cache %1, 0x070(%0) \n" \
" cache %1, 0x080(%0); cache %1, 0x090(%0) \n" \
" cache %1, 0x0a0(%0); cache %1, 0x0b0(%0) \n" \
" cache %1, 0x0c0(%0); cache %1, 0x0d0(%0) \n" \
" cache %1, 0x0e0(%0); cache %1, 0x0f0(%0) \n" \
" cache %1, 0x100(%0); cache %1, 0x110(%0) \n" \
" cache %1, 0x120(%0); cache %1, 0x130(%0) \n" \
" cache %1, 0x140(%0); cache %1, 0x150(%0) \n" \
" cache %1, 0x160(%0); cache %1, 0x170(%0) \n" \
" cache %1, 0x180(%0); cache %1, 0x190(%0) \n" \
" cache %1, 0x1a0(%0); cache %1, 0x1b0(%0) \n" \
" cache %1, 0x1c0(%0); cache %1, 0x1d0(%0) \n" \
" cache %1, 0x1e0(%0); cache %1, 0x1f0(%0) \n" \
" .set mips0 \n" \
" .set reorder \n" \
: \
: "r" (base), \
"i" (op));
static inline void flush_icache_line_indexed(rt_ubase_t addr)
{
cache_op(Index_Invalidate_I, addr);
}
static inline void flush_dcache_line_indexed(rt_ubase_t addr)
{
cache_op(Index_Writeback_Inv_D, addr);
}
static inline void flush_icache_line(rt_ubase_t addr)
{
cache_op(Hit_Invalidate_I, addr);
}
static inline void lock_icache_line(rt_ubase_t addr)
{
cache_op(Fetch_And_Lock_I, addr);
}
static inline void lock_dcache_line(rt_ubase_t addr)
{
cache_op(Fetch_And_Lock_D, addr);
}
static inline void flush_dcache_line(rt_ubase_t addr)
{
cache_op(Hit_Writeback_Inv_D, addr);
}
static inline void invalidate_dcache_line(rt_ubase_t addr)
{
cache_op(Hit_Invalidate_D, addr);
}
static inline void blast_dcache16(void)
{
rt_ubase_t start = KSEG0;
rt_ubase_t end = start + dcache_size;
rt_ubase_t addr;
for (addr = start; addr < end; addr += 0x200)
cache16_unroll32(addr, Index_Writeback_Inv_D);
}
static inline void inv_dcache16(void)
{
rt_ubase_t start = KSEG0;
rt_ubase_t end = start + dcache_size;
rt_ubase_t addr;
for (addr = start; addr < end; addr += 0x200)
cache16_unroll32(addr, Hit_Invalidate_D);
}
static inline void blast_icache16(void)
{
rt_ubase_t start = KSEG0;
rt_ubase_t end = start + icache_size;
rt_ubase_t addr;
for (addr = start; addr < end; addr += 0x200)
cache16_unroll32(addr, Index_Invalidate_I);
}
void r4k_cache_init(void);
void r4k_cache_flush_all(void);
void r4k_icache_flush_all(void);
void r4k_icache_flush_range(rt_ubase_t addr, rt_ubase_t size);
void r4k_icache_lock_range(rt_ubase_t addr, rt_ubase_t size);
void r4k_dcache_inv(rt_ubase_t addr, rt_ubase_t size);
void r4k_dcache_wback_inv(rt_ubase_t addr, rt_ubase_t size);
#endif /*end of __ASSEMBLER__ */
#endif /* end of __CACHE_H__ */