LCOV - code coverage report
Current view: top level - extmod - machine_mem.c (source / functions) Hit Total Coverage
Test: unix_coverage_v1.19.1-724-gfb7d21153.info Lines: 11 35 31.4 %
Date: 2022-12-01 09:37:31 Functions: 2 2 100.0 %
Branches: 4 10 40.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * This file is part of the MicroPython project, http://micropython.org/
       3                 :            :  *
       4                 :            :  * The MIT License (MIT)
       5                 :            :  *
       6                 :            :  * Copyright (c) 2013, 2014 Damien P. George
       7                 :            :  *
       8                 :            :  * Permission is hereby granted, free of charge, to any person obtaining a copy
       9                 :            :  * of this software and associated documentation files (the "Software"), to deal
      10                 :            :  * in the Software without restriction, including without limitation the rights
      11                 :            :  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      12                 :            :  * copies of the Software, and to permit persons to whom the Software is
      13                 :            :  * furnished to do so, subject to the following conditions:
      14                 :            :  *
      15                 :            :  * The above copyright notice and this permission notice shall be included in
      16                 :            :  * all copies or substantial portions of the Software.
      17                 :            :  *
      18                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      19                 :            :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      20                 :            :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      21                 :            :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      22                 :            :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      23                 :            :  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      24                 :            :  * THE SOFTWARE.
      25                 :            :  */
      26                 :            : 
      27                 :            : #include "py/runtime.h"
      28                 :            : #include "extmod/machine_mem.h"
      29                 :            : 
      30                 :            : #if MICROPY_PY_MACHINE
      31                 :            : 
      32                 :            : // If you wish to override the functions for mapping the machine_mem read/write
      33                 :            : // address, then add a #define for MICROPY_MACHINE_MEM_GET_READ_ADDR and/or
      34                 :            : // MICROPY_MACHINE_MEM_GET_WRITE_ADDR in your mpconfigport.h. Since the
      35                 :            : // prototypes are identical, it is allowable for both of the macros to evaluate
      36                 :            : // the to same function.
      37                 :            : //
      38                 :            : // It is expected that the modmachine.c file for a given port will provide the
      39                 :            : // implementations, if the default implementation isn't used.
      40                 :            : 
      41                 :            : #if !defined(MICROPY_MACHINE_MEM_GET_READ_ADDR) || !defined(MICROPY_MACHINE_MEM_GET_WRITE_ADDR)
      42                 :            : STATIC uintptr_t machine_mem_get_addr(mp_obj_t addr_o, uint align) {
      43                 :            :     uintptr_t addr = mp_obj_get_int_truncated(addr_o);
      44                 :            :     if ((addr & (align - 1)) != 0) {
      45                 :            :         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("address %08x is not aligned to %d bytes"), addr, align);
      46                 :            :     }
      47                 :            :     return addr;
      48                 :            : }
      49                 :            : #if !defined(MICROPY_MACHINE_MEM_GET_READ_ADDR)
      50                 :            : #define MICROPY_MACHINE_MEM_GET_READ_ADDR machine_mem_get_addr
      51                 :            : #endif
      52                 :            : #if !defined(MICROPY_MACHINE_MEM_GET_WRITE_ADDR)
      53                 :            : #define MICROPY_MACHINE_MEM_GET_WRITE_ADDR machine_mem_get_addr
      54                 :            : #endif
      55                 :            : #endif
      56                 :            : 
      57                 :          2 : STATIC void machine_mem_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
      58                 :          2 :     (void)kind;
      59                 :          2 :     machine_mem_obj_t *self = MP_OBJ_TO_PTR(self_in);
      60                 :          2 :     mp_printf(print, "<%u-bit memory>", 8 * self->elem_size);
      61                 :          2 : }
      62                 :            : 
      63                 :         14 : STATIC mp_obj_t machine_mem_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
      64                 :            :     // TODO support slice index to read/write multiple values at once
      65                 :         14 :     machine_mem_obj_t *self = MP_OBJ_TO_PTR(self_in);
      66         [ +  + ]:         14 :     if (value == MP_OBJ_NULL) {
      67                 :            :         // delete
      68                 :            :         return MP_OBJ_NULL; // op not supported
      69         [ +  + ]:         12 :     } else if (value == MP_OBJ_SENTINEL) {
      70                 :            :         // load
      71                 :          6 :         uintptr_t addr = MICROPY_MACHINE_MEM_GET_READ_ADDR(index, self->elem_size);
      72                 :          0 :         uint32_t val;
      73      [ #  #  # ]:          0 :         switch (self->elem_size) {
      74                 :          0 :             case 1:
      75                 :          0 :                 val = (*(uint8_t *)addr);
      76                 :          0 :                 break;
      77                 :          0 :             case 2:
      78                 :          0 :                 val = (*(uint16_t *)addr);
      79                 :          0 :                 break;
      80                 :          0 :             default:
      81                 :          0 :                 val = (*(uint32_t *)addr);
      82                 :          0 :                 break;
      83                 :            :         }
      84                 :          0 :         return mp_obj_new_int(val);
      85                 :            :     } else {
      86                 :            :         // store
      87                 :          6 :         uintptr_t addr = MICROPY_MACHINE_MEM_GET_WRITE_ADDR(index, self->elem_size);
      88                 :          0 :         uint32_t val = mp_obj_get_int_truncated(value);
      89      [ #  #  # ]:          0 :         switch (self->elem_size) {
      90                 :          0 :             case 1:
      91                 :          0 :                 (*(uint8_t *)addr) = val;
      92                 :          0 :                 break;
      93                 :          0 :             case 2:
      94                 :          0 :                 (*(uint16_t *)addr) = val;
      95                 :          0 :                 break;
      96                 :          0 :             default:
      97                 :          0 :                 (*(uint32_t *)addr) = val;
      98                 :          0 :                 break;
      99                 :            :         }
     100                 :          0 :         return mp_const_none;
     101                 :            :     }
     102                 :            : }
     103                 :            : 
     104                 :            : MP_DEFINE_CONST_OBJ_TYPE(
     105                 :            :     machine_mem_type,
     106                 :            :     MP_QSTR_mem,
     107                 :            :     MP_TYPE_FLAG_NONE,
     108                 :            :     print, machine_mem_print,
     109                 :            :     subscr, machine_mem_subscr
     110                 :            :     );
     111                 :            : 
     112                 :            : const machine_mem_obj_t machine_mem8_obj = {{&machine_mem_type}, 1};
     113                 :            : const machine_mem_obj_t machine_mem16_obj = {{&machine_mem_type}, 2};
     114                 :            : const machine_mem_obj_t machine_mem32_obj = {{&machine_mem_type}, 4};
     115                 :            : 
     116                 :            : #endif // MICROPY_PY_MACHINE

Generated by: LCOV version 1.15-5-g462f71d