1/* 2 * Copyright (C) 2000 Murray Jensen <Murray.Jensen@cmst.csiro.au> 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23#include <config.h> 24#include <command.h> 25#include <ppc4xx.h> 26#include <version.h> 27 28#define CONFIG_405GP 1 /* needed for Linux kernel header files */ 29#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ 30 31#include <ppc_asm.tmpl> 32#include <ppc_defs.h> 33 34#include <asm/cache.h> 35#include <asm/mmu.h> 36 37#if defined(CONFIG_CMD_KGDB) 38 /* 39 * cache flushing routines for kgdb 40 */ 41 42 .globl kgdb_flush_cache_all 43kgdb_flush_cache_all: 44 /* icache */ 45 iccci r0,r0 /* iccci invalidates the entire I cache */ 46 /* dcache */ 47 addi r6,0,0x0000 /* clear GPR 6 */ 48 addi r7,r0, 128 /* do loop for # of dcache lines */ 49 /* NOTE: dccci invalidates both */ 50 mtctr r7 /* ways in the D cache */ 51..dcloop: 52 dccci 0,r6 /* invalidate line */ 53 addi r6,r6, 32 /* bump to next line */ 54 bdnz ..dcloop 55 blr 56 57 .globl kgdb_flush_cache_range 58kgdb_flush_cache_range: 59 li r5,L1_CACHE_BYTES-1 60 andc r3,r3,r5 61 subf r4,r3,r4 62 add r4,r4,r5 63 srwi. r4,r4,L1_CACHE_SHIFT 64 beqlr 65 mtctr r4 66 mr r6,r3 671: dcbst 0,r3 68 addi r3,r3,L1_CACHE_BYTES 69 bdnz 1b 70 sync /* wait for dcbst's to get to ram */ 71 mtctr r4 722: icbi 0,r6 73 addi r6,r6,L1_CACHE_BYTES 74 bdnz 2b 75 SYNC 76 blr 77 78#endif 79