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1fac917071
Add __keep attribute to irqprio entries to ensure they are not dropped when CONFIG_LTO is enabled. BUG=chrome-os-partner:55920 BRANCH=None TEST=Manual on kevin. Check build/RO/ec.RO.map, verify that .rodata.irqprio section is not empty. Change-Id: I51ae23556d6f46b2cd7ba098f0e7a785292b2853 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/366571 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Helper to declare IRQ handling routines */
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#ifndef __CROS_EC_IRQ_HANDLER_H
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#define __CROS_EC_IRQ_HANDLER_H
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#ifdef CONFIG_TASK_PROFILING
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#define bl_task_start_irq_handler "bl task_start_irq_handler\n"
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#else
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#define bl_task_start_irq_handler ""
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#endif
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/* Helper macros to build the IRQ handler and priority struct names */
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#define IRQ_HANDLER(irqname) CONCAT3(irq_, irqname, _handler)
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#define IRQ_PRIORITY(irqname) CONCAT2(prio_, irqname)
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/*
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* Macro to connect the interrupt handler "routine" to the irq number "irq" and
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* ensure it is enabled in the interrupt controller with the right priority.
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*/
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#define DECLARE_IRQ(irq, routine, priority) DECLARE_IRQ_(irq, routine, priority)
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#define DECLARE_IRQ_(irq, routine, priority) \
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void IRQ_HANDLER(irq)(void) __attribute__((naked)); \
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typedef struct { \
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int dummy[irq >= CONFIG_IRQ_COUNT ? -1 : 1]; \
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} irq_num_check_##irq; \
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void __keep routine(void); \
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void IRQ_HANDLER(irq)(void) \
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{ \
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asm volatile("mov r0, lr\n" \
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"push {r0, lr}\n" \
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bl_task_start_irq_handler \
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"bl "#routine"\n" \
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"pop {r0, lr}\n" \
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"b task_resched_if_needed\n" \
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); \
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} \
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const struct irq_priority __keep IRQ_PRIORITY(irq) \
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__attribute__((section(".rodata.irqprio"))) \
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= {irq, priority}
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#endif /* __CROS_EC_IRQ_HANDLER_H */
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