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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; 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 extern void main(void);
  33 extern char __stack__;
  34 extern char __text_start__, __text_end__;
  35 extern char _start__, _end__;
  36 extern char __bss_start__, __bss_end__;
  37 #if RELOCATE_INTERRUPT
  38 extern char __interrupt_rom__, __interrupt_start__, __interrupt_end__;
  39 #endif
  40
  41 /* Interrupt functions */
  42
  43 void lpc_halt_isr(void)
  44 {
  45         ao_panic(AO_PANIC_CRASH);
  46 }
  47
  48 void lpc_ignore_isr(void)
  49 {
  50 }
  51
  52 void start(void) {
  53 #ifdef AO_BOOT_CHAIN
  54         if (ao_boot_check_chain()) {
  55 #ifdef AO_BOOT_PIN
  56                 if (ao_boot_check_pin())
  57 #endif
  58                 {
  59                         ao_boot_chain(AO_BOOT_APPLICATION_BASE);
  60                 }
  61         }
  62 #endif
  63 #if RELOCATE_INTERRUPT
  64         memcpy(&__interrupt_start__, &__interrupt_rom__, &__interrupt_end__ - &__interrupt_start__);
  65         lpc_scb.sysmemremap = LPC_SCB_SYSMEMREMAP_MAP_RAM << LPC_SCB_SYSMEMREMAP_MAP;
  66 #endif
  67         memcpy(&_start__, &__text_end__, &_end__ - &_start__);
  68         memset(&__bss_start__, '\0', &__bss_end__ - &__bss_start__);
  69         main();
  70 }
  71
  72 #define STRINGIFY(x) #x
  73
  74 #define isr(name) \
  75         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  76         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_ignore_isr))
  77
  78 #define isr_halt(name) \
  79         void __attribute__ ((weak)) lpc_ ## name ## _isr(void); \
  80         _Pragma(STRINGIFY(weak lpc_ ## name ## _isr = lpc_halt_isr))
  81
  82 isr(nmi)
  83 isr_halt(hardfault)
  84 isr_halt(memmanage)
  85 isr_halt(busfault)
  86 isr_halt(usagefault)
  87 isr(svc)
  88 isr(debugmon)
  89 isr(pendsv)
  90 isr(systick)
  91
  92 isr(pin_int0)   /* IRQ0 */
  93 isr(pin_int1)
  94 isr(pin_int2)
  95 isr(pin_int3)
  96 isr(pin_int4)   /* IRQ4 */
  97 isr(pin_int5)
  98 isr(pin_int6)
  99 isr(pin_int7)
 100
 101 isr(gint0)      /* IRQ8 */
 102 isr(gint1)
 103 isr(ssp1)
 104 isr(i2c)
 105
 106 isr(ct16b0)     /* IRQ16 */
 107 isr(ct16b1)
 108 isr(ct32b0)
 109 isr(ct32b1)
 110 isr(ssp0)       /* IRQ20 */
 111 isr(usart)
 112 isr(usb_irq)
 113 isr(usb_fiq)
 114
 115 isr(adc)        /* IRQ24 */
 116 isr(wwdt)
 117 isr(bod)
 118 isr(flash)
 119
 120 isr(usb_wakeup)
 121
 122 #define i(addr,name)    [(addr)/4] = lpc_ ## name ## _isr
 123 #define c(addr,value)   [(addr)/4] = (value)
 124
 125 __attribute__ ((section(".interrupt")))
 126 const void *lpc_interrupt_vector[] = {
 127         [0] = &__stack__,
 128         [1] = start,
 129         i(0x08, nmi),
 130         i(0x0c, hardfault),
 131         c(0x10, 0),
 132         c(0x14, 0),
 133         c(0x18, 0),
 134         c(0x1c, 0),
 135         c(0x20, 0),
 136         c(0x24, 0),
 137         c(0x28, 0),
 138         i(0x2c, svc),
 139         i(0x30, hardfault),
 140         i(0x34, hardfault),
 141         i(0x38, pendsv),
 142         i(0x3c, systick),
 143
 144         i(0x40, pin_int0),      /* IRQ0 */
 145         i(0x44, pin_int1),
 146         i(0x48, pin_int2),
 147         i(0x4c, pin_int3),
 148         i(0x50, pin_int4),      /* IRQ4 */
 149         i(0x54, pin_int5),
 150         i(0x58, pin_int6),
 151         i(0x5c, pin_int7),
 152
 153         i(0x60, gint0),         /* IRQ8 */
 154         i(0x64, gint1),
 155         i(0x68, hardfault),
 156         i(0x6c, hardfault),
 157         i(0x70, hardfault),     /* IRQ12 */
 158         i(0x74, hardfault),
 159         i(0x78, ssp1),
 160         i(0x7c, i2c),
 161
 162         i(0x80, ct16b0),        /* IRQ16 */
 163         i(0x84, ct16b1),
 164         i(0x88, ct32b0),
 165         i(0x8c, ct32b1),
 166         i(0x90, ssp0),          /* IRQ20 */
 167         i(0x94, usart),
 168         i(0x98, usb_irq),
 169         i(0x9c, usb_fiq),
 170
 171         i(0xa0, adc),           /* IRQ24 */
 172         i(0xa4, wwdt),
 173         i(0xa8, bod),
 174         i(0xac, flash),
 175
 176         i(0xb0, hardfault),     /* IRQ28 */
 177         i(0xb4, hardfault),
 178         i(0xb8, usb_wakeup),
 179         i(0xbc, hardfault),
 180 };