diff options
Diffstat (limited to 'core/cortex-m/irq_handler.h')
| -rw-r--r-- | core/cortex-m/irq_handler.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/core/cortex-m/irq_handler.h b/core/cortex-m/irq_handler.h new file mode 100644 index 0000000000..098e9850ef --- /dev/null +++ b/core/cortex-m/irq_handler.h @@ -0,0 +1,39 @@ +/* Copyright (c) 2014 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. + */ + +/* Helper to declare IRQ handling routines */ + +#ifndef __IRQ_HANDLER_H +#define __IRQ_HANDLER_H + +#ifdef CONFIG_TASK_PROFILING +#define bl_task_start_irq_handler "bl task_start_irq_handler\n" +#else +#define bl_task_start_irq_handler "" +#endif + +/* Helper macros to build the IRQ handler and priority struct names */ +#define IRQ_HANDLER(irqname) CONCAT3(irq_, irqname, _handler) +#define IRQ_PRIORITY(irqname) CONCAT2(prio_, irqname) +/* + * Macro to connect the interrupt handler "routine" to the irq number "irq" and + * ensure it is enabled in the interrupt controller with the right priority. + */ +#define DECLARE_IRQ(irq, routine, priority) \ + void IRQ_HANDLER(irq)(void) __attribute__((naked)); \ + void IRQ_HANDLER(irq)(void) \ + { \ + asm volatile("mov r0, lr\n" \ + "push {r0, lr}\n" \ + bl_task_start_irq_handler \ + "bl "#routine"\n" \ + "pop {r0, lr}\n" \ + "b task_resched_if_needed\n" \ + ); \ + } \ + const struct irq_priority IRQ_PRIORITY(irq) \ + __attribute__((section(".rodata.irqprio"))) \ + = {irq, priority} +#endif /* __IRQ_HANDLER_H */ |