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/* Copyright 2018 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Cortex-M CPU vector table
*/
#ifndef ___INIT
#define ___INIT
#include <stddef.h>
#include <stdint.h>
#include "config.h"
#include "panic-internal.h"
#include "task.h"
#endif /* __INIT */
typedef void (*func)(void);
#ifndef PASS
#define PASS 1
#endif
#if PASS == 1
void __attribute__((naked)) default_handler(void)
{
/*
* An (enforced) long tail call to preserve exn_return in lr without
* restricting the relative placement of default_handler and
* exception_panic.
*/
asm volatile("bx %0\n" : : "r" (exception_panic));
}
#define table(x) x
/* Note: the alias target must be defined in this translation unit */
#define weak_with_default __attribute__((used, weak, alias("default_handler")))
#define vec(name) extern void weak_with_default name ## _handler(void);
#define irq(num) vec(irq_ ## num)
#define item(name) extern void name(void);
#define null
extern void stack_end(void); /* not technically correct, it's just a pointer */
extern void reset(void);
#pragma GCC diagnostic push
#if __GNUC__ >= 8
#pragma GCC diagnostic ignored "-Wattribute-alias"
#endif
#pragma GCC diagnostic pop
#endif /* PASS 1 */
#if PASS == 2
#undef table
#undef vec
#undef irq
#undef item
#undef null
/* number of elements before the first irq vector */
#define IRQ_OFFSET 16
/* element in the table that is null: extra IRQs are routed there,
* then finally overwritten
*/
#define IRQ_UNUSED_OFFSET 8
#define table(x) func vectors[] __attribute__((section(".text.vecttable,\"a\" @"))) = { x[IRQ_UNUSED_OFFSET] = null };
#define vec(name) name ## _handler,
#define irq(num) [num < CONFIG_IRQ_COUNT ? num + IRQ_OFFSET : IRQ_UNUSED_OFFSET] = vec(irq_ ## num)
#define item(name) name,
#define null (void *)0,
#endif /* PASS 2 */
table(
item(stack_end)
item(reset)
vec(nmi)
vec(hard_fault)
vec(mpu_fault)
vec(bus_fault)
vec(usage_fault)
null
null
null
null
vec(svc)
vec(debug)
null
vec(pendsv)
vec(sys_tick)
irq(0)
irq(1)
irq(2)
irq(3)
irq(4)
irq(5)
irq(6)
irq(7)
irq(8)
irq(9)
irq(10)
irq(11)
irq(12)
irq(13)
irq(14)
irq(15)
irq(16)
irq(17)
irq(18)
irq(19)
irq(20)
irq(21)
irq(22)
irq(23)
irq(24)
irq(25)
irq(26)
irq(27)
irq(28)
irq(29)
irq(30)
irq(31)
)
#if PASS == 1
#undef PASS
#define PASS 2
#include "vecttable.c"
#endif
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