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Diffstat (limited to 'package/uboot-ifxmips/files/cpu/mips/danube/cache.S')
| -rw-r--r-- | package/uboot-ifxmips/files/cpu/mips/danube/cache.S | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/package/uboot-ifxmips/files/cpu/mips/danube/cache.S b/package/uboot-ifxmips/files/cpu/mips/danube/cache.S deleted file mode 100644 index 9a39784476..0000000000 --- a/package/uboot-ifxmips/files/cpu/mips/danube/cache.S +++ /dev/null @@ -1,278 +0,0 @@ -/* - * Cache-handling routined for MIPS 4K 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 <version.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/addrspace.h> -#include <asm/cacheops.h> -#if defined(CONFIG_IFX_MIPS) -# include "ifx_cache.S" -#endif - - /* 16KB is the maximum size of instruction and data caches on - * MIPS 4K. - */ -#define MIPS_MAX_CACHE_SIZE 0x4000 - - -/* - * 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)) - -/******************************************************************************* -* -* 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 -* -*/ - .globl mips_cache_reset - .ent mips_cache_reset -mips_cache_reset: - - li t2, CFG_ICACHE_SIZE - li t3, CFG_DCACHE_SIZE - li t4, CFG_CACHELINE_SIZE - move t5, t4 - - - li v0, MIPS_MAX_CACHE_SIZE - - /* Now clear that much memory starting from zero. - */ - - li a0, KSEG1 - addu a1, a0, v0 - -2: sw zero, 0(a0) - sw zero, 4(a0) - sw zero, 8(a0) - sw zero, 12(a0) - sw zero, 16(a0) - sw zero, 20(a0) - sw zero, 24(a0) - sw zero, 28(a0) - addu a0, 32 - bltu a0, a1, 2b - - /* Set invalid tag. - */ - - mtc0 zero, CP0_TAGLO -#if defined(CONFIG_IFX_MIPS) && defined(IFX_CACHE_EXTRA_INVALID_TAG) - IFX_CACHE_EXTRA_INVALID_TAG -#endif - - /* - * 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. - */ - - li a0, K0BASE - move a2, t2 # icacheSize - move a3, t4 # icacheLineSize - move a1, a2 - icacheopn(a0,a1,a2,a3,121,(Index_Store_Tag_I,Fill)) - -#if defined(CONFIG_IFX_MIPS) && defined(IFX_CACHE_EXTRA_OPERATION) - IFX_CACHE_EXTRA_OPERATION -#else - /* To support Orion/R4600, we initialise the data cache in 3 passes. - */ - - /* 1: initialise dcache tags. - */ - - li a0, K0BASE - move a2, t3 # dcacheSize - move a3, t5 # dcacheLineSize - move a1, a2 - icacheop(a0,a1,a2,a3,Index_Store_Tag_D) - - /* 2: fill dcache. - */ - - li a0, K0BASE - move a2, t3 # dcacheSize - move a3, t5 # dcacheLineSize - move a1, a2 - icacheopn(a0,a1,a2,a3,1lw,(dummy)) - - /* 3: clear dcache tags. - */ - - li a0, K0BASE - move a2, t3 # dcacheSize - move a3, t5 # dcacheLineSize - move a1, a2 - icacheop(a0,a1,a2,a3,Index_Store_Tag_D) -#endif - - j ra - .end mips_cache_reset - - -/******************************************************************************* -* -* dcache_status - get cache status -* -* RETURNS: 0 - cache disabled; 1 - cache enabled -* -*/ - .globl dcache_status - .ent dcache_status -dcache_status: - - mfc0 v0, CP0_CONFIG - andi v0, v0, 1 - j ra - - .end dcache_status - -/******************************************************************************* -* -* dcache_disable - disable cache -* -* RETURNS: N/A -* -*/ - .globl dcache_disable - .ent dcache_disable -dcache_disable: - - mfc0 t0, CP0_CONFIG - li t1, -8 - and t0, t0, t1 - ori t0, t0, CONF_CM_UNCACHED - mtc0 t0, CP0_CONFIG - j ra - - .end dcache_disable - - -/******************************************************************************* -* -* mips_cache_lock - lock RAM area pointed to by a0 in cache. -* -* RETURNS: N/A -* -*/ -#if defined(CONFIG_PURPLE) -# define CACHE_LOCK_SIZE (CFG_DCACHE_SIZE/2) -#else -# define CACHE_LOCK_SIZE (CFG_DCACHE_SIZE) -#endif - .globl mips_cache_lock - .ent mips_cache_lock -mips_cache_lock: - li a1, K0BASE - CACHE_LOCK_SIZE - addu a0, a1 - li a2, CACHE_LOCK_SIZE - li a3, CFG_CACHELINE_SIZE - move a1, a2 - icacheop(a0,a1,a2,a3,0x1d) - - j ra - .end mips_cache_lock |