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   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; 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 #include <ao.h>
  19 #include <string.h>
  20 #include <ao_boot.h>
  21
  22 #ifndef IS_FLASH_LOADER
  23 #error Should define IS_FLASH_LOADER
  24 #define IS_FLASH_LOADER 0
  25 #endif
  26
  27 #if !IS_FLASH_LOADER
  28 #define RELOCATE_INTERRUPT      1
  29 #endif
  30
  31 extern void main(void);
  32 extern char __stack__;
  33 extern char __text_start__, __text_end__;
  34 extern char __data_start__, __data_end__;
  35 extern char __bss_start__, __bss_end__;
  36 #if RELOCATE_INTERRUPT
  37 extern char __interrupt_rom__, __interrupt_start__, __interrupt_end__;
  38 #endif
  39
  40 /* Interrupt functions */
  41
  42 void lpc_halt_isr(void)
  43 {
  44         ao_panic(AO_PANIC_CRASH);
  45 }
  46
  47 void lpc_ignore_isr(void)
  48 {
  49 }
  50
  51 void start(void) {
  52 #ifdef AO_BOOT_CHAIN
  53         if (ao_boot_check_chain()) {
  54 #ifdef AO_BOOT_PIN
  55                 ao_boot_check_pin();
  56 #endif
  57         }
  58 #endif
  59 #if RELOCATE_INTERRUPT
  60         memcpy(&__interrupt_start__, &__interrupt_rom__, &__interrupt_end__ - &__interrupt_start__);
  61         lpc_scb.sysmemremap = LPC_SCB_SYSMEMREMAP_MAP_RAM << LPC_SCB_SYSMEMREMAP_MAP;
  62 #endif
  63         memcpy(&__data_start__, &__text_end__, &__data_end__ - &__data_start__);
  64         memset(&__bss_start__, '\0', &__bss_end__ - &__bss_start__);
  65         main();
  66 }
  67
  68 #define STRINGIFY(x) #x
  69
  70 #define isr(name) \
  71         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  72         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_ignore_isr))
  73
  74 #define isr_halt(name) \
  75         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  76         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_halt_isr))
  77
  78 isr(nmi)
  79 isr_halt(hardfault)
  80 isr_halt(memmanage)
  81 isr_halt(busfault)
  82 isr_halt(usagefault)
  83 isr(svc)
  84 isr(debugmon)
  85 isr(pendsv)
  86 isr(systick)
  87
  88 isr(pin_int0)   /* IRQ0 */
  89 isr(pin_int1)
  90 isr(pin_int2)
  91 isr(pin_int3)
  92 isr(pin_int4)   /* IRQ4 */
  93 isr(pin_int5)
  94 isr(pin_int6)
  95 isr(pin_int7)
  96
  97 isr(gint0)      /* IRQ8 */
  98 isr(gint1)
  99 isr(ssp1)
 100 isr(i2c)
 101
 102 isr(ct16b0)     /* IRQ16 */
 103 isr(ct16b1)
 104 isr(ct32b0)
 105 isr(ct32b1)
 106 isr(ssp0)       /* IRQ20 */
 107 isr(usart)
 108 isr(usb_irq)
 109 isr(usb_fiq)
 110
 111 isr(adc)        /* IRQ24 */
 112 isr(wwdt)
 113 isr(bod)
 114 isr(flash)
 115
 116 isr(usb_wakeup)
 117
 118 #define i(addr,name)    [(addr)/4] = lpc_ ## name ## _isr
 119 #define c(addr,value)   [(addr)/4] = (value)
 120
 121 __attribute__ ((section(".interrupt")))
 122 const void *lpc_interrupt_vector[] = {
 123         [0] = &__stack__,
 124         [1] = start,
 125         i(0x08, nmi),
 126         i(0x0c, hardfault),
 127         c(0x10, 0),
 128         c(0x14, 0),
 129         c(0x18, 0),
 130         c(0x1c, 0),
 131         c(0x20, 0),
 132         c(0x24, 0),
 133         c(0x28, 0),
 134         i(0x2c, svc),
 135         i(0x30, hardfault),
 136         i(0x34, hardfault),
 137         i(0x38, pendsv),
 138         i(0x3c, systick),
 139
 140         i(0x40, pin_int0),      /* IRQ0 */
 141         i(0x44, pin_int1),
 142         i(0x48, pin_int2),
 143         i(0x4c, pin_int3),
 144         i(0x50, pin_int4),      /* IRQ4 */
 145         i(0x54, pin_int5),
 146         i(0x58, pin_int6),
 147         i(0x5c, pin_int7),
 148
 149         i(0x60, gint0),         /* IRQ8 */
 150         i(0x64, gint1),
 151         i(0x68, hardfault),
 152         i(0x6c, hardfault),
 153         i(0x70, hardfault),     /* IRQ12 */
 154         i(0x74, hardfault),
 155         i(0x78, ssp1),
 156         i(0x7c, i2c),
 157
 158         i(0x80, ct16b0),        /* IRQ16 */
 159         i(0x84, ct16b1),
 160         i(0x88, ct32b0),
 161         i(0x8c, ct32b1),
 162         i(0x90, ssp0),          /* IRQ20 */
 163         i(0x94, usart),
 164         i(0x98, usb_irq),
 165         i(0x9c, usb_fiq),
 166
 167         i(0xa0, adc),           /* IRQ24 */
 168         i(0xa4, wwdt),
 169         i(0xa8, bod),
 170         i(0xac, flash),
 171
 172         i(0xb0, hardfault),     /* IRQ28 */
 173         i(0xb4, hardfault),
 174         i(0xb8, usb_wakeup),
 175         i(0xbc, hardfault),
 176 };