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authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:14 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:25 +0200
commit1e3827d9cf9442e188604fd1099ac38375135125 (patch)
tree4d5f6b1b99cd486c00c4c04145b31a2091ce392d /cpu/mips/cache.S
parentc6fb83d21729321426308c3acff2a3dfb20d250b (diff)
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mips: Move cpu/mips/* to arch/mips/cpu/*
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/mips/cache.S')
-rw-r--r--cpu/mips/cache.S331
1 files changed, 0 insertions, 331 deletions
diff --git a/cpu/mips/cache.S b/cpu/mips/cache.S
deleted file mode 100644
index ff4f11c..0000000
--- a/cpu/mips/cache.S
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Cache-handling routined for MIPS CPUs
- *
- * Copyright (c) 2003 Wolfgang Denk <wd@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <config.h>
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/cacheops.h>
-
-#define RA t8
-
-/*
- * 16kB is the maximum size of instruction and data caches on MIPS 4K,
- * 64kB is on 4KE, 24K, 5K, etc. Set bigger size for convenience.
- *
- * Note that the above size is the maximum size of primary cache. U-Boot
- * doesn't have L2 cache support for now.
- */
-#define MIPS_MAX_CACHE_SIZE 0x10000
-
-#define INDEX_BASE CKSEG0
-
- .macro cache_op op addr
- .set push
- .set noreorder
- .set mips3
- cache \op, 0(\addr)
- .set pop
- .endm
-
-/*
- * cacheop macro to automate cache operations
- * first some helpers...
- */
-#define _mincache(size, maxsize) \
- bltu size,maxsize,9f ; \
- move size,maxsize ; \
-9:
-
-#define _align(minaddr, maxaddr, linesize) \
- .set noat ; \
- subu AT,linesize,1 ; \
- not AT ; \
- and minaddr,AT ; \
- addu maxaddr,-1 ; \
- and maxaddr,AT ; \
- .set at
-
-/* general operations */
-#define doop1(op1) \
- cache op1,0(a0)
-#define doop2(op1, op2) \
- cache op1,0(a0) ; \
- nop ; \
- cache op2,0(a0)
-
-/* specials for cache initialisation */
-#define doop1lw(op1) \
- lw zero,0(a0)
-#define doop1lw1(op1) \
- cache op1,0(a0) ; \
- lw zero,0(a0) ; \
- cache op1,0(a0)
-#define doop121(op1,op2) \
- cache op1,0(a0) ; \
- nop; \
- cache op2,0(a0) ; \
- nop; \
- cache op1,0(a0)
-
-#define _oploopn(minaddr, maxaddr, linesize, tag, ops) \
- .set noreorder ; \
-10: doop##tag##ops ; \
- bne minaddr,maxaddr,10b ; \
- add minaddr,linesize ; \
- .set reorder
-
-/* finally the cache operation macros */
-#define vcacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \
- blez n,11f ; \
- addu n,kva ; \
- _align(kva, n, cacheLineSize) ; \
- _oploopn(kva, n, cacheLineSize, tag, ops) ; \
-11:
-
-#define icacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \
- _mincache(n, cacheSize); \
- blez n,11f ; \
- addu n,kva ; \
- _align(kva, n, cacheLineSize) ; \
- _oploopn(kva, n, cacheLineSize, tag, ops) ; \
-11:
-
-#define vcacheop(kva, n, cacheSize, cacheLineSize, op) \
- vcacheopn(kva, n, cacheSize, cacheLineSize, 1, (op))
-
-#define icacheop(kva, n, cacheSize, cacheLineSize, op) \
- icacheopn(kva, n, cacheSize, cacheLineSize, 1, (op))
-
- .macro f_fill64 dst, offset, val
- LONG_S \val, (\offset + 0 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 1 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 2 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 3 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 4 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 5 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 6 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 7 * LONGSIZE)(\dst)
-#if LONGSIZE == 4
- LONG_S \val, (\offset + 8 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 9 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 10 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 11 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 12 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 13 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 14 * LONGSIZE)(\dst)
- LONG_S \val, (\offset + 15 * LONGSIZE)(\dst)
-#endif
- .endm
-
-/*
- * mips_init_icache(uint PRId, ulong icache_size, unchar icache_linesz)
- */
-LEAF(mips_init_icache)
- blez a1, 9f
- mtc0 zero, CP0_TAGLO
- /* clear tag to invalidate */
- PTR_LI t0, INDEX_BASE
- PTR_ADDU t1, t0, a1
-1: cache_op Index_Store_Tag_I t0
- PTR_ADDU t0, a2
- bne t0, t1, 1b
- /* fill once, so data field parity is correct */
- PTR_LI t0, INDEX_BASE
-2: cache_op Fill t0
- PTR_ADDU t0, a2
- bne t0, t1, 2b
- /* invalidate again - prudent but not strictly neccessary */
- PTR_LI t0, INDEX_BASE
-1: cache_op Index_Store_Tag_I t0
- PTR_ADDU t0, a2
- bne t0, t1, 1b
-9: jr ra
- END(mips_init_icache)
-
-/*
- * mips_init_dcache(uint PRId, ulong dcache_size, unchar dcache_linesz)
- */
-LEAF(mips_init_dcache)
- blez a1, 9f
- mtc0 zero, CP0_TAGLO
- /* clear all tags */
- PTR_LI t0, INDEX_BASE
- PTR_ADDU t1, t0, a1
-1: cache_op Index_Store_Tag_D t0
- PTR_ADDU t0, a2
- bne t0, t1, 1b
- /* load from each line (in cached space) */
- PTR_LI t0, INDEX_BASE
-2: LONG_L zero, 0(t0)
- PTR_ADDU t0, a2
- bne t0, t1, 2b
- /* clear all tags */
- PTR_LI t0, INDEX_BASE
-1: cache_op Index_Store_Tag_D t0
- PTR_ADDU t0, a2
- bne t0, t1, 1b
-9: jr ra
- END(mips_init_dcache)
-
-/*******************************************************************************
-*
-* mips_cache_reset - low level initialisation of the primary caches
-*
-* This routine initialises the primary caches to ensure that they
-* have good parity. It must be called by the ROM before any cached locations
-* are used to prevent the possibility of data with bad parity being written to
-* memory.
-* To initialise the instruction cache it is essential that a source of data
-* with good parity is available. This routine
-* will initialise an area of memory starting at location zero to be used as
-* a source of parity.
-*
-* RETURNS: N/A
-*
-*/
-NESTED(mips_cache_reset, 0, ra)
- move RA, ra
- li t2, CONFIG_SYS_ICACHE_SIZE
- li t3, CONFIG_SYS_DCACHE_SIZE
- li t4, CONFIG_SYS_CACHELINE_SIZE
- move t5, t4
-
- li v0, MIPS_MAX_CACHE_SIZE
-
- /*
- * Now clear that much memory starting from zero.
- */
- PTR_LI a0, CKSEG1
- PTR_ADDU a1, a0, v0
-2: PTR_ADDIU a0, 64
- f_fill64 a0, -64, zero
- bne a0, a1, 2b
-
- /*
- * The caches are probably in an indeterminate state,
- * so we force good parity into them by doing an
- * invalidate, load/fill, invalidate for each line.
- */
-
- /*
- * Assume bottom of RAM will generate good parity for the cache.
- */
-
- /*
- * Initialize the I-cache first,
- */
- move a1, t2
- move a2, t4
- PTR_LA t7, mips_init_icache
- jalr t7
-
- /*
- * then initialize D-cache.
- */
- move a1, t3
- move a2, t5
- PTR_LA t7, mips_init_dcache
- jalr t7
-
- jr RA
- END(mips_cache_reset)
-
-/*******************************************************************************
-*
-* dcache_status - get cache status
-*
-* RETURNS: 0 - cache disabled; 1 - cache enabled
-*
-*/
-LEAF(dcache_status)
- mfc0 t0, CP0_CONFIG
- li t1, CONF_CM_UNCACHED
- andi t0, t0, CONF_CM_CMASK
- move v0, zero
- beq t0, t1, 2f
- li v0, 1
-2: jr ra
- END(dcache_status)
-
-/*******************************************************************************
-*
-* dcache_disable - disable cache
-*
-* RETURNS: N/A
-*
-*/
-LEAF(dcache_disable)
- mfc0 t0, CP0_CONFIG
- li t1, -8
- and t0, t0, t1
- ori t0, t0, CONF_CM_UNCACHED
- mtc0 t0, CP0_CONFIG
- jr ra
- END(dcache_disable)
-
-/*******************************************************************************
-*
-* dcache_enable - enable cache
-*
-* RETURNS: N/A
-*
-*/
-LEAF(dcache_enable)
- mfc0 t0, CP0_CONFIG
- ori t0, CONF_CM_CMASK
- xori t0, CONF_CM_CMASK
- ori t0, CONF_CM_CACHABLE_NONCOHERENT
- mtc0 t0, CP0_CONFIG
- jr ra
- END(dcache_enable)
-
-#ifdef CONFIG_SYS_INIT_RAM_LOCK_MIPS
-/*******************************************************************************
-*
-* mips_cache_lock - lock RAM area pointed to by a0 in cache.
-*
-* RETURNS: N/A
-*
-*/
-#if defined(CONFIG_PURPLE)
-# define CACHE_LOCK_SIZE (CONFIG_SYS_DCACHE_SIZE/2)
-#else
-# define CACHE_LOCK_SIZE (CONFIG_SYS_DCACHE_SIZE)
-#endif
- .globl mips_cache_lock
- .ent mips_cache_lock
-mips_cache_lock:
- li a1, CKSEG0 - CACHE_LOCK_SIZE
- addu a0, a1
- li a2, CACHE_LOCK_SIZE
- li a3, CONFIG_SYS_CACHELINE_SIZE
- move a1, a2
- icacheop(a0,a1,a2,a3,0x1d)
-
- jr ra
-
- .end mips_cache_lock
-#endif /* CONFIG_SYS_INIT_RAM_LOCK_MIPS */