drivers/staging/media/atomisp/pci/sh_css_mmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Support for Intel Camera Imaging ISP subsystem.
   4  * Copyright (c) 2015, Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  */
  15
  16 #include "ia_css_mmu.h"
  17 #include "ia_css_mmu_private.h"
  18 #include <ia_css_debug.h>
  19 #include "sh_css_sp.h"
  20 #include "sh_css_firmware.h"
  21 #include "sp.h"
  22 #include "mmu_device.h"
  23
  24 void
  25 ia_css_mmu_invalidate_cache(void)
  26 {
  27         const struct ia_css_fw_info *fw = &sh_css_sp_fw;
  28         unsigned int HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb;
  29
  30         ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE,
  31                             "ia_css_mmu_invalidate_cache() enter\n");
  32
  33         /* if the SP is not running we should not access its dmem */
  34         if (sh_css_sp_is_running()) {
  35                 HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb = fw->info.sp.invalidate_tlb;
  36
  37                 (void)HIVE_ADDR_ia_css_dmaproxy_sp_invalidate_tlb; /* Suppres warnings in CRUN */
  38
  39                 sp_dmem_store_uint32(SP0_ID,
  40                                      (unsigned int)sp_address_of(ia_css_dmaproxy_sp_invalidate_tlb),
  41                                      true);
  42         }
  43         ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE,
  44                             "ia_css_mmu_invalidate_cache() leave\n");
  45 }
  46
  47 void
  48 sh_css_mmu_set_page_table_base_index(hrt_data base_index)
  49 {
  50         int i;
  51
  52         IA_CSS_ENTER_PRIVATE("base_index=0x%08x\n", base_index);
  53         for (i = 0; i < N_MMU_ID; i++) {
  54                 mmu_ID_t mmu_id = i;
  55
  56                 mmu_set_page_table_base_index(mmu_id, base_index);
  57                 mmu_invalidate_cache(mmu_id);
  58         }
  59         IA_CSS_LEAVE_PRIVATE("");
  60 }