git.gag.com Git - fw/altos/blob - src/lpc/ao_interrupt.c

   1 /*
   2  * Copyright © 2013 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; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include <ao.h>
  20 #include <string.h>
  21 #include <ao_boot.h>
  22
  23 #ifndef IS_FLASH_LOADER
  24 #error Should define IS_FLASH_LOADER
  25 #define IS_FLASH_LOADER 0
  26 #endif
  27
  28 #if !IS_FLASH_LOADER
  29 #define RELOCATE_INTERRUPT      1
  30 #endif
  31
  32 /* Interrupt functions */
  33
  34 void lpc_halt_isr(void)
  35 {
  36         ao_panic(AO_PANIC_CRASH);
  37 }
  38
  39 void lpc_ignore_isr(void)
  40 {
  41 }
  42
  43 #define STRINGIFY(x) #x
  44
  45 #define isr(name) \
  46         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  47         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_ignore_isr))
  48
  49 #define isr_halt(name) \
  50         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  51         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_halt_isr))
  52
  53 isr(nmi)
  54 isr_halt(hardfault)
  55 isr_halt(memmanage)
  56 isr_halt(busfault)
  57 isr_halt(usagefault)
  58 isr(svc)
  59 isr(debugmon)
  60 isr(pendsv)
  61 isr(systick)
  62
  63 isr(pin_int0)   /* IRQ0 */
  64 isr(pin_int1)
  65 isr(pin_int2)
  66 isr(pin_int3)
  67 isr(pin_int4)   /* IRQ4 */
  68 isr(pin_int5)
  69 isr(pin_int6)
  70 isr(pin_int7)
  71
  72 isr(gint0)      /* IRQ8 */
  73 isr(gint1)
  74 isr(ssp1)
  75 isr(i2c)
  76
  77 isr(ct16b0)     /* IRQ16 */
  78 isr(ct16b1)
  79 isr(ct32b0)
  80 isr(ct32b1)
  81 isr(ssp0)       /* IRQ20 */
  82 isr(usart)
  83 isr(usb_irq)
  84 isr(usb_fiq)
  85
  86 isr(adc)        /* IRQ24 */
  87 isr(wwdt)
  88 isr(bod)
  89 isr(flash)
  90
  91 isr(usb_wakeup)
  92
  93 #define i(addr,name)    [(addr)/4] = lpc_ ## name ## _isr
  94 #define c(addr,value)   [(addr)/4] = (value)
  95
  96 extern char __stack[];
  97 extern void _start(void);
  98
  99 __attribute__ ((section(".init")))
 100 const void *const lpc_interrupt_vector[0x40] = {
 101         [0] = __stack,
 102         [1] = _start,
 103         i(0x08, nmi),
 104         i(0x0c, hardfault),
 105         c(0x10, 0),
 106         c(0x14, 0),
 107         c(0x18, 0),
 108         c(0x1c, 0),
 109         c(0x20, 0),
 110         c(0x24, 0),
 111         c(0x28, 0),
 112         i(0x2c, svc),
 113         i(0x30, hardfault),
 114         i(0x34, hardfault),
 115         i(0x38, pendsv),
 116         i(0x3c, systick),
 117
 118         i(0x40, pin_int0),      /* IRQ0 */
 119         i(0x44, pin_int1),
 120         i(0x48, pin_int2),
 121         i(0x4c, pin_int3),
 122         i(0x50, pin_int4),      /* IRQ4 */
 123         i(0x54, pin_int5),
 124         i(0x58, pin_int6),
 125         i(0x5c, pin_int7),
 126
 127         i(0x60, gint0),         /* IRQ8 */
 128         i(0x64, gint1),
 129         i(0x68, hardfault),
 130         i(0x6c, hardfault),
 131         i(0x70, hardfault),     /* IRQ12 */
 132         i(0x74, hardfault),
 133         i(0x78, ssp1),
 134         i(0x7c, i2c),
 135
 136         i(0x80, ct16b0),        /* IRQ16 */
 137         i(0x84, ct16b1),
 138         i(0x88, ct32b0),
 139         i(0x8c, ct32b1),
 140         i(0x90, ssp0),          /* IRQ20 */
 141         i(0x94, usart),
 142         i(0x98, usb_irq),
 143         i(0x9c, usb_fiq),
 144
 145         i(0xa0, adc),           /* IRQ24 */
 146         i(0xa4, wwdt),
 147         i(0xa8, bod),
 148         i(0xac, flash),
 149
 150         i(0xb0, hardfault),     /* IRQ28 */
 151         i(0xb4, hardfault),
 152         i(0xb8, usb_wakeup),
 153         i(0xbc, hardfault),
 154 };
 155
 156 extern char __interrupt_start[];
 157
 158 void _init(void);
 159
 160 void _init(void)
 161 {
 162 #ifdef AO_BOOT_CHAIN
 163         if (ao_boot_check_chain()) {
 164 #ifdef AO_BOOT_PIN
 165                 ao_boot_check_pin();
 166 #endif
 167         }
 168 #endif
 169 #if RELOCATE_INTERRUPT
 170         /* This will erase the boot chain data */
 171         memcpy(__interrupt_start, lpc_interrupt_vector, sizeof (lpc_interrupt_vector));
 172         lpc_scb.sysmemremap = LPC_SCB_SYSMEMREMAP_MAP_RAM << LPC_SCB_SYSMEMREMAP_MAP;
 173 #endif
 174 }
 175