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[/] [neorv32/] [trunk/] [rtl/] [core/] [neorv32_cpu_bus.vhd] - Diff between revs 28 and 29

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Rev 28 Rev 29
Line 458... Line 458... 
 
 
 
 
  -- check access type and regions's permissions --
 
  -- check access type and regions's permissions --
 
  pmp_check_permission: process(pmp, pmp_ctrl_i, priv_mode_i)
 
  pmp_check_permission: process(pmp, pmp_ctrl_i, priv_mode_i)
 
  begin
 
  begin
 
    for r in 0 to PMP_NUM_REGIONS-1 loop -- iterate over all regions
 
    for r in 0 to PMP_NUM_REGIONS-1 loop -- iterate over all regions
 
      if ((priv_mode_i = u_priv_mode_c) or (pmp_ctrl_i(r)(pmp_cfg_l_c) = '1')) and -- user privilege level or locked pmp entry -> enforce permissions also for machine mode
 
      if ((priv_mode_i = priv_mode_u_c) or (pmp_ctrl_i(r)(pmp_cfg_l_c) = '1')) and -- user privilege level or locked pmp entry -> enforce permissions also for machine mode
 
          (pmp_ctrl_i(r)(pmp_cfg_ah_c downto pmp_cfg_al_c) /= pmp_off_mode_c) then -- active entry
 
          (pmp_ctrl_i(r)(pmp_cfg_ah_c downto pmp_cfg_al_c) /= pmp_off_mode_c) then -- active entry
 
        pmp.if_fault(r) <= pmp.i_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_x_c)); -- fetch access match no execute permission
 
        pmp.if_fault(r) <= pmp.i_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_x_c)); -- fetch access match no execute permission
 
        pmp.ld_fault(r) <= pmp.d_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_r_c)); -- load access match no read permission
 
        pmp.ld_fault(r) <= pmp.d_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_r_c)); -- load access match no read permission
 
        pmp.st_fault(r) <= pmp.d_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_w_c)); -- store access match no write permission
 
        pmp.st_fault(r) <= pmp.d_match(r) and (not pmp_ctrl_i(r)(pmp_cfg_w_c)); -- store access match no write permission
 
      else
 
      else

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