cpu/mpc8xx/kgdb.S

   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 <mpc8xx.h>
  26 #include <version.h>
  27
  28 #define CONFIG_8xx 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  /*
  40  * cache flushing routines for kgdb
  41  */
  42
  43         .globl  kgdb_flush_cache_all
  44 kgdb_flush_cache_all:
  45         lis     r3, IDC_INVALL@h
  46         mtspr   DC_CST, r3
  47         sync
  48         lis     r3, IDC_INVALL@h
  49         mtspr   IC_CST, r3
  50         SYNC
  51         blr
  52
  53         .globl  kgdb_flush_cache_range
  54 kgdb_flush_cache_range:
  55         li      r5,CONFIG_SYS_CACHELINE_SIZE-1
  56         andc    r3,r3,r5
  57         subf    r4,r3,r4
  58         add     r4,r4,r5
  59         srwi.   r4,r4,CONFIG_SYS_CACHELINE_SHIFT
  60         beqlr
  61         mtctr   r4
  62         mr      r6,r3
  63 1:      dcbst   0,r3
  64         addi    r3,r3,CONFIG_SYS_CACHELINE_SIZE
  65         bdnz    1b
  66         sync                            /* wait for dcbst's to get to ram */
  67         mtctr   r4
  68 2:      icbi    0,r6
  69         addi    r6,r6,CONFIG_SYS_CACHELINE_SIZE
  70         bdnz    2b
  71         SYNC
  72         blr
  73
  74 #endif