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[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [cmds/] [cpu.c] - Blame information for rev 221

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Line No. Rev Author Line
1 2 marcus.erl 
#include "common.h"
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#include "support.h"
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#include "spr_defs.h"
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int ic_enable_cmd (int argc, char *argv[])
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{
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  unsigned long addr;
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  unsigned long sr;
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  if (argc) return -1;
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  /* Invalidate IC */
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  for (addr = 0; addr < 8192; addr += 16)
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    asm("l.mtspr r0,%0,%1": : "r" (addr), "i" (SPR_ICBIR));
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  /* Enable IC */
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  asm("l.mfspr %0,r0,%1": "=r" (sr) : "i" (SPR_SR));
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  sr |= SPR_SR_ICE;
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  asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  return 0;
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}
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int ic_disable_cmd (int argc, char *argv[])
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{
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  unsigned long sr;
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  if (argc) return -1;
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  /* Disable IC */
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  asm("l.mfspr %0,r0,%1": "=r" (sr) : "i" (SPR_SR));
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  sr &= ~SPR_SR_ICE;
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  asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  return 0;
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}
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int dc_enable_cmd (int argc, char *argv[])
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{
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  unsigned long addr;
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  unsigned long sr;
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  if (argc) return -1;
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  /* Invalidate DC */
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  for (addr = 0; addr < 8192; addr += 16)
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    asm("l.mtspr r0,%0,%1": : "r" (addr), "i" (SPR_DCBIR));
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  /* Enable DC */
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  asm("l.mfspr %0,r0,%1": "=r" (sr) : "i" (SPR_SR));
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  sr |= SPR_SR_DCE;
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  asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  return 0;
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}
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int dc_disable_cmd (int argc, char *argv[])
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{
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  unsigned long sr;
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  if (argc) return -1;
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  /* Disable DC */
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  asm("l.mfspr %0,r0,%1": "=r" (sr) : "i" (SPR_SR));
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  sr &= ~SPR_SR_DCE;
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  asm("l.mtspr r0,%0,%1": : "r" (sr), "i" (SPR_SR));
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  asm("l.nop");
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  return 0;
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}
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int mfspr_cmd (int argc, char *argv[])
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{
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  unsigned long val, addr;
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  if (argc ==   1) {
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    addr = strtoul (argv[0], 0, 0);
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    /* Read SPR */
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    asm("l.mfspr %0,%1,0": "=r" (val) : "r" (addr));
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    printf ("\nSPR %04lx: %08lx", addr, val);
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  } else return -1;
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        return 0;
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}
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int mtspr_cmd (int argc, char *argv[])
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{
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  unsigned long val, addr;
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  if (argc == 2) {
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    addr = strtoul (argv[0], 0, 0);
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    val = strtoul (argv[1], 0, 0);
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    /* Write SPR */
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    asm("l.mtspr %0,%1,0": : "r" (addr), "r" (val));
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    asm("l.mfspr %0,%1,0": "=r" (val) : "r" (addr));
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    printf ("\nSPR %04lx: %08lx", addr, val);
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  } else return -1;
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        return 0;
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}
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void module_cpu_init (void)
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{
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  register_command ("ic_enable", "", "enable instruction cache", ic_enable_cmd);
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  register_command ("ic_disable", "", "disable instruction cache", ic_disable_cmd);
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  register_command ("dc_enable", "", "enable data cache", dc_enable_cmd);
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  register_command ("dc_disable", "", "disable data cache", dc_disable_cmd);
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  register_command ("mfspr", "<spr_addr>", "show SPR", mfspr_cmd);
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  register_command ("mtspr", "<spr_addr> <value>", "set SPR", mtspr_cmd);
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}

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