arch/powerpc/cpu/mpc8xx/kgdb.S

   1 /*
   2  *  Copyright (C) 2000  Murray Jensen <Murray.Jensen@cmst.csiro.au>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <config.h>
   8 #include <command.h>
   9 #include <mpc8xx.h>
  10 #include <version.h>
  11
  12 #define CONFIG_8xx 1            /* needed for Linux kernel header files */
  13 #define _LINUX_CONFIG_H 1       /* avoid reading Linux autoconf.h file  */
  14
  15 #include <ppc_asm.tmpl>
  16 #include <ppc_defs.h>
  17
  18 #include <asm/cache.h>
  19 #include <asm/mmu.h>
  20
  21 #if defined(CONFIG_CMD_KGDB)
  22
  23  /*
  24  * cache flushing routines for kgdb
  25  */
  26
  27         .globl  kgdb_flush_cache_all
  28 kgdb_flush_cache_all:
  29         lis     r3, IDC_INVALL@h
  30         mtspr   DC_CST, r3
  31         sync
  32         lis     r3, IDC_INVALL@h
  33         mtspr   IC_CST, r3
  34         SYNC
  35         blr
  36
  37         .globl  kgdb_flush_cache_range
  38 kgdb_flush_cache_range:
  39         li      r5,CONFIG_SYS_CACHELINE_SIZE-1
  40         andc    r3,r3,r5
  41         subf    r4,r3,r4
  42         add     r4,r4,r5
  43         srwi.   r4,r4,CONFIG_SYS_CACHELINE_SHIFT
  44         beqlr
  45         mtctr   r4
  46         mr      r6,r3
  47 1:      dcbst   0,r3
  48         addi    r3,r3,CONFIG_SYS_CACHELINE_SIZE
  49         bdnz    1b
  50         sync                            /* wait for dcbst's to get to ram */
  51         mtctr   r4
  52 2:      icbi    0,r6
  53         addi    r6,r6,CONFIG_SYS_CACHELINE_SIZE
  54         bdnz    2b
  55         SYNC
  56         blr
  57
  58 #endif