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diff --git a/share/doc/gcc/Epiphany-Function-Attributes.html b/share/doc/gcc/Epiphany-Function-Attributes.html new file mode 100644 index 0000000..d959b41 --- /dev/null +++ b/share/doc/gcc/Epiphany-Function-Attributes.html @@ -0,0 +1,166 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +Copyright (C) 1988-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). 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The single parameter identifies the section where +the trampoline is placed. +</p> +<a name="index-interrupt-function-attribute_002c-Epiphany"></a> +</dd> +<dt><code>interrupt</code></dt> +<dd><p>Use this attribute to indicate +that the specified function is an interrupt handler. The compiler generates +function entry and exit sequences suitable for use in an interrupt handler +when this attribute is present. It may also generate +a special section with code to initialize the interrupt vector table. +</p> +<p>On Epiphany targets one or more optional parameters can be added like this: +</p> +<div class="smallexample"> +<pre class="smallexample">void __attribute__ ((interrupt ("dma0, dma1"))) universal_dma_handler (); +</pre></div> + +<p>Permissible values for these parameters are: <code>reset</code><!-- /@w -->, +<code><span class="nolinebreak">software_exception</span></code><!-- /@w -->, <code><span class="nolinebreak">page_miss</span></code><!-- /@w -->, +<code>timer0</code><!-- /@w -->, <code>timer1</code><!-- /@w -->, <code>message</code><!-- /@w -->, +<code>dma0</code><!-- /@w -->, <code>dma1</code><!-- /@w -->, <code>wand</code><!-- /@w --> and <code>swi</code><!-- /@w -->. +Multiple parameters indicate that multiple entries in the interrupt +vector table should be initialized for this function, i.e. for each +parameter <var>name</var><!-- /@w -->, a jump to the function is emitted in +the section <span class="nolinebreak">ivt_entry_</span><var>name</var><!-- /@w -->. The parameter(s) may be omitted +entirely, in which case no interrupt vector table entry is provided. +</p> +<p>Note that interrupts are enabled inside the function +unless the <code>disinterrupt</code> attribute is also specified. +</p> +<p>The following examples are all valid uses of these attributes on +Epiphany targets: +</p><div class="smallexample"> +<pre class="smallexample">void __attribute__ ((interrupt)) universal_handler (); +void __attribute__ ((interrupt ("dma1"))) dma1_handler (); +void __attribute__ ((interrupt ("dma0, dma1"))) + universal_dma_handler (); +void __attribute__ ((interrupt ("timer0"), disinterrupt)) + fast_timer_handler (); +void __attribute__ ((interrupt ("dma0, dma1"), + forwarder_section ("tramp"))) + external_dma_handler (); +</pre></div> + +<a name="index-long_005fcall-function-attribute_002c-Epiphany"></a> +<a name="index-short_005fcall-function-attribute_002c-Epiphany"></a> +<a name="index-indirect-calls_002c-Epiphany"></a> +</dd> +<dt><code>long_call</code></dt> +<dt><code>short_call</code></dt> +<dd><p>These attributes specify how a particular function is called. +These attributes override the +<samp>-mlong-calls</samp> (see <a href="Adapteva-Epiphany-Options.html#Adapteva-Epiphany-Options">Adapteva Epiphany Options</a>) +command-line switch and <code>#pragma long_calls</code> settings. +</p></dd> +</dl> + + +<hr> +<div class="header"> +<p> +Next: <a href="H8_002f300-Function-Attributes.html#H8_002f300-Function-Attributes" accesskey="n" rel="next">H8/300 Function Attributes</a>, Previous: <a href="C_002dSKY-Function-Attributes.html#C_002dSKY-Function-Attributes" accesskey="p" rel="previous">C-SKY Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> + + + +</body> +</html> |