/*****************************************************************************

    AudioScience HPI driver
    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Debug macros.

*****************************************************************************/

#ifndef _HPIDEBUG_H
#define _HPIDEBUG_H

#include "hpi_internal.h"

/* Define debugging levels.  */
enum { HPI_DEBUG_LEVEL_ERROR = 0,	/* always log errors */
	HPI_DEBUG_LEVEL_WARNING = 1,
	HPI_DEBUG_LEVEL_NOTICE = 2,
	HPI_DEBUG_LEVEL_INFO = 3,
	HPI_DEBUG_LEVEL_DEBUG = 4,
	HPI_DEBUG_LEVEL_VERBOSE = 5	/* same printk level as DEBUG */
};

#define HPI_DEBUG_LEVEL_DEFAULT HPI_DEBUG_LEVEL_NOTICE

/* an OS can define an extra flag string that is appended to
   the start of each message, eg see linux kernel hpios.h */

#ifdef SOURCEFILE_NAME
#define FILE_LINE  SOURCEFILE_NAME ":" __stringify(__LINE__) " "
#else
#define FILE_LINE  __FILE__ ":" __stringify(__LINE__) " "
#endif

#define HPI_DEBUG_ASSERT(expression) \
	do { \
		if (!(expression)) { \
			printk(KERN_ERR  FILE_LINE \
				"ASSERT " __stringify(expression)); \
		} \
	} while (0)

#define HPI_DEBUG_LOG(level, ...) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
			printk(HPI_DEBUG_FLAG_##level \
			FILE_LINE  __VA_ARGS__); \
		} \
	} while (0)

void hpi_debug_init(void);
int hpi_debug_level_set(int level);
int hpi_debug_level_get(void);
/* needed by Linux driver for dynamic debug level changes */
extern int hpi_debug_level;

void hpi_debug_message(struct hpi_message *phm, char *sz_fileline);

void hpi_debug_data(u16 *pdata, u32 len);

#define HPI_DEBUG_DATA(pdata, len) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_VERBOSE) \
			hpi_debug_data(pdata, len); \
	} while (0)

#define HPI_DEBUG_MESSAGE(level, phm) \
	do { \
		if (hpi_debug_level >= HPI_DEBUG_LEVEL_##level) { \
			hpi_debug_message(phm, HPI_DEBUG_FLAG_##level \
				FILE_LINE __stringify(level)); \
		} \
	} while (0)

#define HPI_DEBUG_RESPONSE(phr) \
	do { \
		if (((hpi_debug_level >= HPI_DEBUG_LEVEL_DEBUG) && \
			(phr->error)) ||\
		(hpi_debug_level >= HPI_DEBUG_LEVEL_VERBOSE)) \
			printk(KERN_DEBUG "HPI_RES%d,%d,%d\n", \
				phr->version, phr->error, phr->specific_error); \
	} while (0)

#ifndef compile_time_assert
#define compile_time_assert(cond, msg) \
    typedef char msg[(cond) ? 1 : -1]
#endif

#endif				/* _HPIDEBUG_H_  */
'/cgit.cgi/linux/net-next.git/commit/sound?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/sunxi?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>sunxi</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/sunxi/Kconfig?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Kconfig</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='c8f325a59cfc718d13a50fbc746ed9b415c25e92'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-02-01 17:45:02 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 21:17:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/sunxi/Kconfig?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/soc/sunxi/Kconfig?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/sunxi/Kconfig?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>sound/soc/sunxi/Kconfig</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/sunxi/Kconfig?h=nds-private-remove&amp;id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/sunxi/Kconfig?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92&amp;id2=bf29bddf0417a4783da3b24e8c9e017ac649326f'>diff</a>)</td></tr></table>
<div class='commit-subject'>efi/fdt: Avoid FDT manipulation after ExitBootServices()</div><div class='commit-msg'>Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Riku Voipio &lt;riku.voipio@linaro.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'sound/soc/sunxi/Kconfig')</div><table summary='diffstat' class='diffstat'>