| Nico Huber | 5e9b1b5 | 2016-10-08 22:09:33 +0200 | [diff] [blame] | 1 | -- |
| 2 | -- Copyright (C) 2016 secunet Security Networks AG |
| 3 | -- |
| 4 | -- This program is free software; you can redistribute it and/or modify |
| 5 | -- it under the terms of the GNU General Public License as published by |
| Nico Huber | aab715f | 2016-10-18 00:22:25 +0200 | [diff] [blame] | 6 | -- the Free Software Foundation; either version 2 of the License, or |
| 7 | -- (at your option) any later version. |
| Nico Huber | 5e9b1b5 | 2016-10-08 22:09:33 +0200 | [diff] [blame] | 8 | -- |
| 9 | -- This program is distributed in the hope that it will be useful, |
| 10 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | -- GNU General Public License for more details. |
| 13 | -- |
| 14 | |
| 15 | package body HW.MMIO_Regs |
| 16 | is |
| 17 | |
| 18 | generic |
| 19 | type Word_T is mod <>; |
| 20 | procedure Read_G (Value : out Word_T; Idx : Subs_P.Index_T); |
| 21 | |
| 22 | procedure Read_G (Value : out Word_T; Idx : Subs_P.Index_T) |
| 23 | is |
| 24 | Off : constant Range_P.Index_T := Range_P.Index_T |
| 25 | ((Byte_Offset + Regs (Idx).Byte_Offset) / (Range_P.Element_T'Size / 8)); |
| 26 | pragma Warnings |
| 27 | (GNAT, Off, """Mask"" is not modified, could be declared constant", |
| 28 | Reason => "Ada RM forbids making it constant."); |
| 29 | Mask : Word64 := Shift_Left (1, Regs (Idx).MSB + 1 - Regs (Idx).LSB) - 1; |
| 30 | pragma Warnings |
| 31 | (GNAT, On, """Mask"" is not modified, could be declared constant"); |
| 32 | Temp : Range_P.Element_T; |
| 33 | begin |
| 34 | Range_P.Read (Temp, Off); |
| 35 | Value := Word_T (Shift_Right (Word64 (Temp), Regs (Idx).LSB) and Mask); |
| 36 | end Read_G; |
| 37 | |
| 38 | procedure Read_I is new Read_G (Word8); |
| 39 | procedure Read (Value : out Word8; Idx : Subs_P.Index_T) renames Read_I; |
| 40 | |
| 41 | procedure Read_I is new Read_G (Word16); |
| 42 | procedure Read (Value : out Word16; Idx : Subs_P.Index_T) renames Read_I; |
| 43 | |
| 44 | procedure Read_I is new Read_G (Word32); |
| 45 | procedure Read (Value : out Word32; Idx : Subs_P.Index_T) renames Read_I; |
| 46 | |
| 47 | procedure Read_I is new Read_G (Word64); |
| 48 | procedure Read (Value : out Word64; Idx : Subs_P.Index_T) renames Read_I; |
| 49 | |
| 50 | ---------------------------------------------------------------------------- |
| 51 | |
| 52 | generic |
| 53 | type Word_T is mod <>; |
| 54 | procedure Write_G (Idx : Subs_P.Index_T; Value : Word_T); |
| 55 | |
| 56 | procedure Write_G (Idx : Subs_P.Index_T; Value : Word_T) |
| 57 | is |
| 58 | Off : constant Range_P.Index_T := Range_P.Index_T |
| 59 | ((Byte_Offset + Regs (Idx).Byte_Offset) / (Range_P.Element_T'Size / 8)); |
| 60 | pragma Warnings |
| 61 | (GNAT, Off, """Mask"" is not modified, could be declared constant", |
| 62 | Reason => "Ada RM forbids making it constant."); |
| 63 | Mask : Word64 := |
| 64 | Shift_Left (1, Regs (Idx).MSB + 1) - Shift_Left (1, Regs (Idx).LSB); |
| 65 | pragma Warnings |
| 66 | (GNAT, On, """Mask"" is not modified, could be declared constant"); |
| 67 | Temp : Range_P.Element_T; |
| 68 | begin |
| 69 | if Regs (Idx).MSB - Regs (Idx).LSB + 1 = Range_P.Element_T'Size then |
| 70 | Range_P.Write (Off, Range_P.Element_T (Value)); |
| 71 | else |
| 72 | -- read/modify/write |
| 73 | Range_P.Read (Temp, Off); |
| 74 | Temp := Range_P.Element_T |
| 75 | ((Word64 (Temp) and not Mask) or |
| 76 | (Shift_Left (Word64 (Value), Regs (Idx).LSB))); |
| 77 | Range_P.Write (Off, Temp); |
| 78 | end if; |
| 79 | end Write_G; |
| 80 | |
| 81 | procedure Write_I is new Write_G (Word8); |
| 82 | procedure Write (Idx : Subs_P.Index_T; Value : Word8) renames Write_I; |
| 83 | |
| 84 | procedure Write_I is new Write_G (Word16); |
| 85 | procedure Write (Idx : Subs_P.Index_T; Value : Word16) renames Write_I; |
| 86 | |
| 87 | procedure Write_I is new Write_G (Word32); |
| 88 | procedure Write (Idx : Subs_P.Index_T; Value : Word32) renames Write_I; |
| 89 | |
| 90 | procedure Write_I is new Write_G (Word64); |
| 91 | procedure Write (Idx : Subs_P.Index_T; Value : Word64) renames Write_I; |
| 92 | |
| 93 | end HW.MMIO_Regs; |