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   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   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
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 /*
  19  * CC1111 definitions and code fragments for AltOS
  20  */
  21
  22 #ifndef _AO_ARCH_H_
  23 #define _AO_ARCH_H_
  24
  25 #include "cc1111.h"
  26
  27 /* Convert a __data pointer into an __xdata pointer */
  28 #define DATA_TO_XDATA(a)        ((void __xdata *) ((uint8_t) (a) | 0xff00))
  29
  30 /* Stack runs from above the allocated __data space to 0xfe, which avoids
  31  * writing to 0xff as that triggers the stack overflow indicator
  32  */
  33 #define AO_STACK_START  0x90
  34 #define AO_STACK_END    0xfe
  35 #define AO_STACK_SIZE   (AO_STACK_END - AO_STACK_START + 1)
  36
  37 #define ao_arch_reboot() do {                                   \
  38         WDCTL = WDCTL_EN | WDCTL_MODE_WATCHDOG | WDCTL_INT_64;  \
  39         ao_delay(AO_SEC_TO_TICKS(2));                           \
  40         } while (0)
  41
  42 #define ao_arch_nop()   _asm nop _endasm
  43 #define ao_arch_interrupt(n)    __interrupt n
  44
  45 #define ao_arch_naked_declare   __naked
  46 #define ao_arch_naked_define    __naked
  47
  48 /* CC1111-specific drivers */
  49
  50 /*
  51  * ao_romconfig.c
  52  */
  53
  54 #define AO_ROMCONFIG_VERSION    2
  55
  56 extern __code __at (0x00a0) uint16_t ao_romconfig_version;
  57 extern __code __at (0x00a2) uint16_t ao_romconfig_check;
  58 extern __code __at (0x00a4) uint16_t ao_serial_number;
  59 extern __code __at (0x00a6) uint32_t ao_radio_cal;
  60
  61 #ifndef HAS_USB
  62 #error Please define HAS_USB
  63 #endif
  64
  65 #if HAS_USB
  66 extern __code __at (0x00aa) uint8_t ao_usb_descriptors [];
  67 #endif
  68
  69 /* Initialize stack */
  70 #define ao_arch_init_stack(task, start) {                       \
  71         uint8_t __xdata *stack = task->stack;                   \
  72         uint8_t t;                                              \
  73         *stack++ = ((uint16_t) start);          /* 0 */         \
  74         *stack++ = ((uint16_t) start) >> 8;     /* 1 */         \
  75                                                                 \
  76         /* and the stuff saved by ao_switch */                  \
  77         *stack++ = 0;                           /* 2 acc */     \
  78         *stack++ = 0x80;                        /* 3 IE */      \
  79                                                                 \
  80         /*  4 DPL                                               \
  81          *  5 DPH                                               \
  82          *  6 B                                                 \
  83          *  7 R2                                                \
  84          *  8 R3                                                \
  85          *  9 R4                                                \
  86          * 10 R5                                                \
  87          * 11 R6                                                \
  88          * 12 R7                                                \
  89          * 13 R0                                                \
  90          * 14 R1                                                \
  91          * 15 PSW                                               \
  92          * 16 BP                                                \
  93          */                                                     \
  94         for (t = 0; t < 13; t++)                                \
  95                 *stack++ = 0;                                   \
  96         task->stack_count = 17;                                 \
  97         }
  98
  99
 100
 101 /* Save current context */
 102
 103 #define ao_arch_save_context() \
 104         _asm \
 105                 /* Push ACC first, as when restoring the context it must be restored \
 106                  * last (it is used to set the IE register). */ \
 107                 push    ACC \
 108                 /* Store the IE register then enable interrupts. */ \
 109                 push    _IEN0 \
 110                 setb    _EA \
 111                 push    DPL \
 112                 push    DPH \
 113                 push    b \
 114                 push    ar2 \
 115                 push    ar3 \
 116                 push    ar4 \
 117                 push    ar5 \
 118                 push    ar6 \
 119                 push    ar7 \
 120                 push    ar0 \
 121                 push    ar1 \
 122                 push    PSW \
 123         _endasm; \
 124         PSW = 0; \
 125         _asm \
 126                 push    _bp \
 127         _endasm
 128
 129
 130
 131 #endif /* _AO_ARCH_H_ */