gpsp/3ds/3ds_utils.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <3ds.h>
#include "3ds_utils.h"

typedef s32 (*ctr_callback_type)(void);
static bool has_rosalina;

void check_rosalina() {
  int64_t version;
  uint32_t major;

  has_rosalina = false;

  if (!svcGetSystemInfo(&version, 0x10000, 0)) {
     major = GET_VERSION_MAJOR(version);

     if (major >= 8)
       has_rosalina = true;
  }
}

static void ctr_invalidate_ICache_kernel(void)
{
   __asm__ volatile(
      "cpsid aif\n\t"
      "mov r0, #0\n\t"
      "mcr p15, 0, r0, c7, c5, 0\n\t");
}

static void ctr_flush_DCache_kernel(void)
{
   __asm__ volatile(
      "cpsid aif\n\t"
      "mov r0, #0\n\t"
      "mcr p15, 0, r0, c7, c10, 0\n\t");

}

void ctr_invalidate_ICache(void)
{
   svcBackdoor((ctr_callback_type)ctr_invalidate_ICache_kernel);

}

void ctr_flush_DCache(void)
{
   svcBackdoor((ctr_callback_type)ctr_flush_DCache_kernel);
}


void ctr_flush_invalidate_cache(void)
{
   if (has_rosalina) {
      ctr_clear_cache();
   } else {
      ctr_flush_DCache();
      ctr_invalidate_ICache();
   }
}