/*
 * wmfw.h - Wolfson firmware format information
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __WMFW_H
#define __WMFW_H

#include <linux/types.h>

#define WMFW_MAX_ALG_NAME         256
#define WMFW_MAX_ALG_DESCR_NAME   256

#define WMFW_MAX_COEFF_NAME       256
#define WMFW_MAX_COEFF_DESCR_NAME 256

#define WMFW_CTL_FLAG_SYS         0x8000
#define WMFW_CTL_FLAG_VOLATILE    0x0004
#define WMFW_CTL_FLAG_WRITEABLE   0x0002
#define WMFW_CTL_FLAG_READABLE    0x0001

/* Non-ALSA coefficient types start at 0x1000 */
#define WMFW_CTL_TYPE_ACKED       0x1000 /* acked control */
#define WMFW_CTL_TYPE_HOSTEVENT   0x1001 /* event control */

struct wmfw_header {
	char magic[4];
	__le32 len;
	__le16 rev;
	u8 core;
	u8 ver;
} __packed;

struct wmfw_footer {
	__le64 timestamp;
	__le32 checksum;
} __packed;

struct wmfw_adsp1_sizes {
	__le32 dm;
	__le32 pm;
	__le32 zm;
} __packed;

struct wmfw_adsp2_sizes {
	__le32 xm;
	__le32 ym;
	__le32 pm;
	__le32 zm;
} __packed;

struct wmfw_region {
	union {
		__be32 type;
		__le32 offset;
	};
	__le32 len;
	u8 data[];
} __packed;

struct wmfw_id_hdr {
	__be32 core_id;
	__be32 core_rev;
	__be32 id;
	__be32 ver;
} __packed;

struct wmfw_adsp1_id_hdr {
	struct wmfw_id_hdr fw;
	__be32 zm;
	__be32 dm;
	__be32 n_algs;
} __packed;

struct wmfw_adsp2_id_hdr {
	struct wmfw_id_hdr fw;
	__be32 zm;
	__be32 xm;
	__be32 ym;
	__be32 n_algs;
} __packed;

struct wmfw_alg_hdr {
	__be32 id;
	__be32 ver;
} __packed;

struct wmfw_adsp1_alg_hdr {
	struct wmfw_alg_hdr alg;
	__be32 zm;
	__be32 dm;
} __packed;

struct wmfw_adsp2_alg_hdr {
	struct wmfw_alg_hdr alg;
	__be32 zm;
	__be32 xm;
	__be32 ym;
} __packed;

struct wmfw_adsp_alg_data {
	__le32 id;
	u8 name[WMFW_MAX_ALG_NAME];
	u8 descr[WMFW_MAX_ALG_DESCR_NAME];
	__le32 ncoeff;
	u8 data[];
} __packed;

struct wmfw_adsp_coeff_data {
	struct {
		__le16 offset;
		__le16 type;
		__le32 size;
	} hdr;
	u8 name[WMFW_MAX_COEFF_NAME];
	u8 descr[WMFW_MAX_COEFF_DESCR_NAME];
	__le16 ctl_type;
	__le16 flags;
	__le32 len;
	u8 data[];
} __packed;

struct wmfw_coeff_hdr {
	u8 magic[4];
	__le32 len;
	union {
		__be32 rev;
		__le32 ver;
	};
	union {
		__be32 core;
		__le32 core_ver;
	};
	u8 data[];
} __packed;

struct wmfw_coeff_item {
	__le16 offset;
	__le16 type;
	__le32 id;
	__le32 ver;
	__le32 sr;
	__le32 len;
	u8 data[];
} __packed;

#define WMFW_ADSP1 1
#define WMFW_ADSP2 2

#define WMFW_ABSOLUTE         0xf0
#define WMFW_ALGORITHM_DATA   0xf2
#define WMFW_NAME_TEXT        0xfe
#define WMFW_INFO_TEXT        0xff

#define WMFW_ADSP1_PM 2
#define WMFW_ADSP1_DM 3
#define WMFW_ADSP1_ZM 4

#define WMFW_ADSP2_PM 2
#define WMFW_ADSP2_ZM 4
#define WMFW_ADSP2_XM 5
#define WMFW_ADSP2_YM 6

#endif
t-next.git/commit/sound/pci?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>au88x0</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0/au8830.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>au8830.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><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/pci/au88x0/au8830.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/au88x0/au8830.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/au88x0/au8830.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>sound/pci/au88x0/au8830.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/au88x0/au8830.c?id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/au88x0/au8830.c?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/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'sound/pci/au88x0/au8830.c')</div><table summary='diffstat' class='diffstat'>