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/* Copyright 2018 The ChromiumOS Authors
* 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);
#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
/* Disable warning that "initializer overrides prior initialization of this
* subobject", since we are explicitly doing this to handle the unused IRQs.
*/
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Winitializer-overrides"
#endif /* __clang__ */
#define table(x) \
const func vectors[] __attribute__(( \
section(".text.vecttable"))) = { 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 == 2
#ifdef __clang__
#pragma clang diagnostic pop
#endif /* __clang__ */
#endif
#if PASS == 1
#undef PASS
#define PASS 2
#include "vecttable.c"
#endif
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