first cut at turnon scripts for EasyTimer v2

[fw/altos] / src / lpc / ao_interrupt.c

diff --git a/src/lpc/ao_interrupt.c b/src/lpc/ao_interrupt.c
index b5e67007f0919458480f378438a6a70810583b97..25413abb04964676c1367d968118bd7d200a6a18 100644 (file)
--- a/src/lpc/ao_interrupt.c
+++ b/src/lpc/ao_interrupt.c
@@ -3,7 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -17,12 +18,16 @@
 
 #include <ao.h>
 #include <string.h>
+#include <ao_boot.h>
 
-extern void main(void);
-extern char __stack__;
-extern char __text_start__, __text_end__;
-extern char __data_start__, __data_end__;
-extern char __bss_start__, __bss_end__;
+#ifndef IS_FLASH_LOADER
+#error Should define IS_FLASH_LOADER
+#define IS_FLASH_LOADER        0
+#endif
+
+#if !IS_FLASH_LOADER
+#define RELOCATE_INTERRUPT     1
+#endif
 
 /* Interrupt functions */
 
@@ -35,15 +40,6 @@ void lpc_ignore_isr(void)
 {
 }
 
-int x;
-
-void start(void) {
-       x = 0;
-       memcpy(&__data_start__, &__text_end__, &__data_end__ - &__data_start__);
-       memset(&__bss_start__, '\0', &__bss_end__ - &__bss_start__);
-       main();
-}
-
 #define STRINGIFY(x) #x
 
 #define isr(name) \
@@ -97,10 +93,13 @@ isr(usb_wakeup)
 #define i(addr,name)   [(addr)/4] = lpc_ ## name ## _isr
 #define c(addr,value)  [(addr)/4] = (value)
 
-__attribute__ ((section(".interrupt")))
-const void *lpc_interrupt_vector[] = {
-       [0] = &__stack__,
-       [1] = start,
+extern char __stack[];
+void _start(void) __attribute__((__noreturn__));
+
+__attribute__ ((section(".init")))
+const void *const __interrupt_vector[0x30] = {
+       [0] = __stack,
+       [1] = _start,
        i(0x08, nmi),
        i(0x0c, hardfault),
        c(0x10, 0),
@@ -151,5 +150,51 @@ const void *lpc_interrupt_vector[] = {
        i(0xb0, hardfault),     /* IRQ28 */
        i(0xb4, hardfault),
        i(0xb8, usb_wakeup),
-       i(0xbc, hardfault),     
+       i(0xbc, hardfault),
 };
+
+/*
+ * Previous versions of this code had a 256 byte interupt vector. Add
+ * some padding to make sure the other low ROM variables land at the
+ * same address
+ */
+
+__attribute__ ((section(".init.0")))
+const void *const __interrupt_pad[0x10];
+
+#if IS_FLASH_LOADER
+/* Flash loader needs a magic value at 0x2fc to be 0x4E69 7370 */
+__attribute__ ((section(".no_isp")))
+const uint32_t force_no_isp = 0x4E697370;
+#endif
+
+void main(void) __attribute__((__noreturn__));
+
+void *__interrupt_ram[sizeof(__interrupt_vector)/sizeof(__interrupt_vector[0])] __attribute((section(".preserve.1")));
+
+extern char __data_source[];
+extern char __data_start[];
+extern char __data_size[];
+extern char __bss_start[];
+extern char __bss_size[];
+
+void _start(void) {
+       memcpy(__data_start, __data_source, (uintptr_t) __data_size);
+       memset(__bss_start, '\0', (uintptr_t) __bss_size);
+
+#ifdef AO_BOOT_CHAIN
+       if (ao_boot_check_chain()) {
+#ifdef AO_BOOT_PIN
+               if (ao_boot_check_pin())
+#endif
+               {
+                       ao_boot_chain(AO_BOOT_APPLICATION_BASE);
+               }
+       }
+#endif
+#if RELOCATE_INTERRUPT
+       memcpy(__interrupt_ram, __interrupt_vector, sizeof(__interrupt_ram));
+       lpc_scb.sysmemremap = LPC_SCB_SYSMEMREMAP_MAP_RAM << LPC_SCB_SYSMEMREMAP_MAP;
+#endif
+       main();
+}