Renesas ARM Based SoC Updates for v4.17

01d675f159 ARM: shmobile: rcar-gen2: Add watchdog support
 58adf1ba0d ARM: shmobile: Add watchdog support
 
 * SoC
   - Identify R-Car V3H (r8a77980) and M3N (r8a77965)
 
   - Enable R-Car Gen2 regulator quirk for Stout board with H3 (r8a7790) SoC
 
     Marek Vaust says "Regulator setup is suboptimal on H2 Stout too. The
     Stout newly has two DA9210 regulators, so the quirk is extended to
     handle another DA9210 at i2c address 0x70."
 
   - Add watchdog support
 
     This is the SoC portion of the following solution. It is not yet
     enabled in DT as it is not functional without clock dependencies
     in place.
 
     Fabrizio Castro says "this series has been around for some time as RFC,
     and it has collected useful comments from the community along the way.
     The solution proposed by this patch set works for most R-Car Gen2 and
     RZ/G1 devices, but not all of them. We now know that for some R-Car
     Gen2 early revisions there is no proper software fix. Anyway, no
     product has been built around early revisions, but development boards
     mounting early revisions (basically prototypes) are still out there.
     As a result, this series isn't enabling the internal watchdog on R-Car
     Gen2 boards, developers may enable it in board specific device trees if
     needed.  This series has been tested by me on the iwg20d, iwg22d,
     Lager, Alt, and Koelsch boards.
 
    The problem
    ===========
    To deal with SMP on R-Car Gen2 and RZ/G1, we install a reset vector to
    ICRAM1 and we program the [S]BAR registers so that when we turn ON the
    non-boot CPUs they are redirected to the reset vector installed by Linux
    in ICRAM1, and eventually they continue the execution to RAM, where the
    SMP bring-up code will take care of the rest.  The content of the [S]BAR
    registers survives a watchdog triggered reset, and as such after the
    watchdog fires the boot core will try and execute the SMP bring-up code
    instead of jumping to the bootrom code.
 
    The fix
    =======
    The main strategy for the solution is to let the reset vector decide if
    it needs to jump to shmobile_boot_fn or to the bootrom code.  In a
    watchdog triggered reset scenario, since the [S]BAR registers keep their
    values, the boot CPU will jump into the newly designed reset vector, the
    assembly routine will eventually test WOVF (a bit in register RWTCSRA
    that indicates if the watchdog counter has overflown, the value of this
    bit gets retained in this scenario), and jump to the bootrom code which
    will in turn load up the bootloader, etc.  When bringing up SMP or using
    CPU hotplug, the reset vector will jump to shmobile_boot_fn instead."
 
 * R-Car Rst
   - Add support for R-Car V3H (r8a77980) and V3H (r8a77980)
 
 * R-Car SYSC
   - Mark rcar_sysc_matches[] __initconst
 
    Geert Uytterhoeven says "This frees another 1764 bytes
    (arm32/shmobile_defconfig) or 1000 bytes (arm64/renesas_defconfig) of
    memory after kernel init."
 
   - Fix power area parents
 
     Sergei Shtylyov says "According to the figure 9.2(b) of the R-Car
     Series, 3rd Generation User’s Manual: Hardware Rev. 0.80 the A2IRn and
     A2SCn power areas in R8A77970 have the A3IR area as a parent, thus the
     SYSC driver has those parents wrong.."
 
   - Add support for R-Car V3H (r8a77980) and V3H (r8a77980)
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Merge tag 'renesas-soc-for-v4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Pull "Renesas ARM Based SoC Updates for v4.17" from Simon Horman:

01d675f159 ARM: shmobile: rcar-gen2: Add watchdog support
58adf1ba0d ARM: shmobile: Add watchdog support

* SoC
  - Identify R-Car V3H (r8a77980) and M3N (r8a77965)

  - Enable R-Car Gen2 regulator quirk for Stout board with H3 (r8a7790) SoC

    Marek Vaust says "Regulator setup is suboptimal on H2 Stout too. The
    Stout newly has two DA9210 regulators, so the quirk is extended to
    handle another DA9210 at i2c address 0x70."

  - Add watchdog support

    This is the SoC portion of the following solution. It is not yet
    enabled in DT as it is not functional without clock dependencies
    in place.

    Fabrizio Castro says "this series has been around for some time as RFC,
    and it has collected useful comments from the community along the way.
    The solution proposed by this patch set works for most R-Car Gen2 and
    RZ/G1 devices, but not all of them. We now know that for some R-Car
    Gen2 early revisions there is no proper software fix. Anyway, no
    product has been built around early revisions, but development boards
    mounting early revisions (basically prototypes) are still out there.
    As a result, this series isn't enabling the internal watchdog on R-Car
    Gen2 boards, developers may enable it in board specific device trees if
    needed.  This series has been tested by me on the iwg20d, iwg22d,
    Lager, Alt, and Koelsch boards.

   The problem
   ===========
   To deal with SMP on R-Car Gen2 and RZ/G1, we install a reset vector to
   ICRAM1 and we program the [S]BAR registers so that when we turn ON the
   non-boot CPUs they are redirected to the reset vector installed by Linux
   in ICRAM1, and eventually they continue the execution to RAM, where the
   SMP bring-up code will take care of the rest.  The content of the [S]BAR
   registers survives a watchdog triggered reset, and as such after the
   watchdog fires the boot core will try and execute the SMP bring-up code
   instead of jumping to the bootrom code.

   The fix
   =======
   The main strategy for the solution is to let the reset vector decide if
   it needs to jump to shmobile_boot_fn or to the bootrom code.  In a
   watchdog triggered reset scenario, since the [S]BAR registers keep their
   values, the boot CPU will jump into the newly designed reset vector, the
   assembly routine will eventually test WOVF (a bit in register RWTCSRA
   that indicates if the watchdog counter has overflown, the value of this
   bit gets retained in this scenario), and jump to the bootrom code which
   will in turn load up the bootloader, etc.  When bringing up SMP or using
   CPU hotplug, the reset vector will jump to shmobile_boot_fn instead."

* R-Car Rst
  - Add support for R-Car V3H (r8a77980) and V3H (r8a77980)

* R-Car SYSC
  - Mark rcar_sysc_matches[] __initconst

   Geert Uytterhoeven says "This frees another 1764 bytes
   (arm32/shmobile_defconfig) or 1000 bytes (arm64/renesas_defconfig) of
   memory after kernel init."

  - Fix power area parents

    Sergei Shtylyov says "According to the figure 9.2(b) of the R-Car
    Series, 3rd Generation User’s Manual: Hardware Rev. 0.80 the A2IRn and
    A2SCn power areas in R8A77970 have the A3IR area as a parent, thus the
    SYSC driver has those parents wrong.."

  - Add support for R-Car V3H (r8a77980) and V3H (r8a77980)

* tag 'renesas-soc-for-v4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: rcar-gen2: Add watchdog support
  ARM: shmobile: Add watchdog support
  ARM: shmobile: rcar-gen2: Fix error check in regulator quirk
  soc: renesas: rcar-rst: Add support for R-Car M3-N
  ARM: shmobile: stout: enable R-Car Gen2 regulator quirk
  soc: renesas: rcar-sysc: Add R-Car M3-N support
  soc: renesas: Identify R-Car M3-N
  soc: renesas: rcar-sysc: add R8A77980 support
  dt-bindings: power: add R8A77980 SYSC power domain definitions
  soc: renesas: r8a77970-sysc: fix power area parents
  soc: renesas: rcar-rst: Enable watchdog as reset trigger for Gen2
  soc: renesas: rcar-rst: add R8A77980 support
  soc: renesas: identify R-Car V3H
  soc: renesas: rcar-sysc: Mark rcar_sysc_matches[] __initconst
This commit is contained in:
Arnd Bergmann 2018-03-27 15:45:03 +02:00
commit 59162c9366
18 changed files with 331 additions and 26 deletions

View file

@ -3,8 +3,8 @@ config SOC_RENESAS
default y if ARCH_RENESAS
select SOC_BUS
select RST_RCAR if ARCH_RCAR_GEN1 || ARCH_RCAR_GEN2 || \
ARCH_R8A7795 || ARCH_R8A7796 || ARCH_R8A77970 || \
ARCH_R8A77995
ARCH_R8A7795 || ARCH_R8A7796 || ARCH_R8A77965 || \
ARCH_R8A77970 || ARCH_R8A77980 || ARCH_R8A77995
select SYSC_R8A7743 if ARCH_R8A7743
select SYSC_R8A7745 if ARCH_R8A7745
select SYSC_R8A7779 if ARCH_R8A7779
@ -14,7 +14,9 @@ config SOC_RENESAS
select SYSC_R8A7794 if ARCH_R8A7794
select SYSC_R8A7795 if ARCH_R8A7795
select SYSC_R8A7796 if ARCH_R8A7796
select SYSC_R8A77965 if ARCH_R8A77965
select SYSC_R8A77970 if ARCH_R8A77970
select SYSC_R8A77980 if ARCH_R8A77980
select SYSC_R8A77995 if ARCH_R8A77995
if SOC_RENESAS
@ -56,10 +58,18 @@ config SYSC_R8A7796
bool "R-Car M3-W System Controller support" if COMPILE_TEST
select SYSC_RCAR
config SYSC_R8A77965
bool "R-Car M3-N System Controller support" if COMPILE_TEST
select SYSC_RCAR
config SYSC_R8A77970
bool "R-Car V3M System Controller support" if COMPILE_TEST
select SYSC_RCAR
config SYSC_R8A77980
bool "R-Car V3H System Controller support" if COMPILE_TEST
select SYSC_RCAR
config SYSC_R8A77995
bool "R-Car D3 System Controller support" if COMPILE_TEST
select SYSC_RCAR

View file

@ -12,7 +12,9 @@ obj-$(CONFIG_SYSC_R8A7792) += r8a7792-sysc.o
obj-$(CONFIG_SYSC_R8A7794) += r8a7794-sysc.o
obj-$(CONFIG_SYSC_R8A7795) += r8a7795-sysc.o
obj-$(CONFIG_SYSC_R8A7796) += r8a7796-sysc.o
obj-$(CONFIG_SYSC_R8A77965) += r8a77965-sysc.o
obj-$(CONFIG_SYSC_R8A77970) += r8a77970-sysc.o
obj-$(CONFIG_SYSC_R8A77980) += r8a77980-sysc.o
obj-$(CONFIG_SYSC_R8A77995) += r8a77995-sysc.o
# Family

View file

@ -0,0 +1,37 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Renesas R-Car M3-N System Controller
* Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
*
* Based on Renesas R-Car M3-W System Controller
* Copyright (C) 2016 Glider bvba
*/
#include <linux/bug.h>
#include <linux/kernel.h>
#include <dt-bindings/power/r8a77965-sysc.h>
#include "rcar-sysc.h"
static const struct rcar_sysc_area r8a77965_areas[] __initconst = {
{ "always-on", 0, 0, R8A77965_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
{ "ca57-scu", 0x1c0, 0, R8A77965_PD_CA57_SCU, R8A77965_PD_ALWAYS_ON,
PD_SCU },
{ "ca57-cpu0", 0x80, 0, R8A77965_PD_CA57_CPU0, R8A77965_PD_CA57_SCU,
PD_CPU_NOCR },
{ "ca57-cpu1", 0x80, 1, R8A77965_PD_CA57_CPU1, R8A77965_PD_CA57_SCU,
PD_CPU_NOCR },
{ "cr7", 0x240, 0, R8A77965_PD_CR7, R8A77965_PD_ALWAYS_ON },
{ "a3vc", 0x380, 0, R8A77965_PD_A3VC, R8A77965_PD_ALWAYS_ON },
{ "a3vp", 0x340, 0, R8A77965_PD_A3VP, R8A77965_PD_ALWAYS_ON },
{ "a2vc1", 0x3c0, 1, R8A77965_PD_A2VC1, R8A77965_PD_A3VC },
{ "3dg-a", 0x100, 0, R8A77965_PD_3DG_A, R8A77965_PD_ALWAYS_ON },
{ "3dg-b", 0x100, 1, R8A77965_PD_3DG_B, R8A77965_PD_3DG_A },
{ "a3ir", 0x180, 0, R8A77965_PD_A3IR, R8A77965_PD_ALWAYS_ON },
};
const struct rcar_sysc_info r8a77965_sysc_info __initconst = {
.areas = r8a77965_areas,
.num_areas = ARRAY_SIZE(r8a77965_areas),
};

View file

@ -25,12 +25,12 @@ static const struct rcar_sysc_area r8a77970_areas[] __initconst = {
PD_CPU_NOCR },
{ "cr7", 0x240, 0, R8A77970_PD_CR7, R8A77970_PD_ALWAYS_ON },
{ "a3ir", 0x180, 0, R8A77970_PD_A3IR, R8A77970_PD_ALWAYS_ON },
{ "a2ir0", 0x400, 0, R8A77970_PD_A2IR0, R8A77970_PD_ALWAYS_ON },
{ "a2ir1", 0x400, 1, R8A77970_PD_A2IR1, R8A77970_PD_A2IR0 },
{ "a2ir2", 0x400, 2, R8A77970_PD_A2IR2, R8A77970_PD_A2IR0 },
{ "a2ir3", 0x400, 3, R8A77970_PD_A2IR3, R8A77970_PD_A2IR0 },
{ "a2sc0", 0x400, 4, R8A77970_PD_A2SC0, R8A77970_PD_ALWAYS_ON },
{ "a2sc1", 0x400, 5, R8A77970_PD_A2SC1, R8A77970_PD_A2SC0 },
{ "a2ir0", 0x400, 0, R8A77970_PD_A2IR0, R8A77970_PD_A3IR },
{ "a2ir1", 0x400, 1, R8A77970_PD_A2IR1, R8A77970_PD_A3IR },
{ "a2ir2", 0x400, 2, R8A77970_PD_A2IR2, R8A77970_PD_A3IR },
{ "a2ir3", 0x400, 3, R8A77970_PD_A2IR3, R8A77970_PD_A3IR },
{ "a2sc0", 0x400, 4, R8A77970_PD_A2SC0, R8A77970_PD_A3IR },
{ "a2sc1", 0x400, 5, R8A77970_PD_A2SC1, R8A77970_PD_A3IR },
};
const struct rcar_sysc_info r8a77970_sysc_info __initconst = {

View file

@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Renesas R-Car V3H System Controller
*
* Copyright (C) 2018 Renesas Electronics Corp.
* Copyright (C) 2018 Cogent Embedded, Inc.
*/
#include <linux/bug.h>
#include <linux/kernel.h>
#include <dt-bindings/power/r8a77980-sysc.h>
#include "rcar-sysc.h"
static const struct rcar_sysc_area r8a77980_areas[] __initconst = {
{ "always-on", 0, 0, R8A77980_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
{ "ca53-scu", 0x140, 0, R8A77980_PD_CA53_SCU, R8A77980_PD_ALWAYS_ON,
PD_SCU },
{ "ca53-cpu0", 0x200, 0, R8A77980_PD_CA53_CPU0, R8A77980_PD_CA53_SCU,
PD_CPU_NOCR },
{ "ca53-cpu1", 0x200, 1, R8A77980_PD_CA53_CPU1, R8A77980_PD_CA53_SCU,
PD_CPU_NOCR },
{ "ca53-cpu2", 0x200, 2, R8A77980_PD_CA53_CPU2, R8A77980_PD_CA53_SCU,
PD_CPU_NOCR },
{ "ca53-cpu3", 0x200, 3, R8A77980_PD_CA53_CPU3, R8A77980_PD_CA53_SCU,
PD_CPU_NOCR },
{ "cr7", 0x240, 0, R8A77980_PD_CR7, R8A77980_PD_ALWAYS_ON },
{ "a3ir", 0x180, 0, R8A77980_PD_A3IR, R8A77980_PD_ALWAYS_ON },
{ "a2ir0", 0x400, 0, R8A77980_PD_A2IR0, R8A77980_PD_A3IR },
{ "a2ir1", 0x400, 1, R8A77980_PD_A2IR1, R8A77980_PD_A3IR },
{ "a2ir2", 0x400, 2, R8A77980_PD_A2IR2, R8A77980_PD_A3IR },
{ "a2ir3", 0x400, 3, R8A77980_PD_A2IR3, R8A77980_PD_A3IR },
{ "a2ir4", 0x400, 4, R8A77980_PD_A2IR4, R8A77980_PD_A3IR },
{ "a2ir5", 0x400, 5, R8A77980_PD_A2IR5, R8A77980_PD_A3IR },
{ "a2sc0", 0x400, 6, R8A77980_PD_A2SC0, R8A77980_PD_A3IR },
{ "a2sc1", 0x400, 7, R8A77980_PD_A2SC1, R8A77980_PD_A3IR },
{ "a2sc2", 0x400, 8, R8A77980_PD_A2SC2, R8A77980_PD_A3IR },
{ "a2sc3", 0x400, 9, R8A77980_PD_A2SC3, R8A77980_PD_A3IR },
{ "a2sc4", 0x400, 10, R8A77980_PD_A2SC4, R8A77980_PD_A3IR },
{ "a2pd0", 0x400, 11, R8A77980_PD_A2PD0, R8A77980_PD_A3IR },
{ "a2pd1", 0x400, 12, R8A77980_PD_A2PD1, R8A77980_PD_A3IR },
{ "a2cn", 0x400, 13, R8A77980_PD_A2CN, R8A77980_PD_A3IR },
{ "a3vip", 0x2c0, 0, R8A77980_PD_A3VIP, R8A77980_PD_ALWAYS_ON },
{ "a3vip1", 0x300, 0, R8A77980_PD_A3VIP1, R8A77980_PD_A3VIP },
{ "a3vip2", 0x280, 0, R8A77980_PD_A3VIP2, R8A77980_PD_A3VIP },
};
const struct rcar_sysc_info r8a77980_sysc_info __initconst = {
.areas = r8a77980_areas,
.num_areas = ARRAY_SIZE(r8a77980_areas),
};

View file

@ -13,8 +13,18 @@
#include <linux/of_address.h>
#include <linux/soc/renesas/rcar-rst.h>
#define WDTRSTCR_RESET 0xA55A0002
#define WDTRSTCR 0x0054
static int rcar_rst_enable_wdt_reset(void __iomem *base)
{
iowrite32(WDTRSTCR_RESET, base + WDTRSTCR);
return 0;
}
struct rst_config {
unsigned int modemr; /* Mode Monitoring Register Offset */
unsigned int modemr; /* Mode Monitoring Register Offset */
int (*configure)(void *base); /* Platform specific configuration */
};
static const struct rst_config rcar_rst_gen1 __initconst = {
@ -23,6 +33,11 @@ static const struct rst_config rcar_rst_gen1 __initconst = {
static const struct rst_config rcar_rst_gen2 __initconst = {
.modemr = 0x60,
.configure = rcar_rst_enable_wdt_reset,
};
static const struct rst_config rcar_rst_gen3 __initconst = {
.modemr = 0x60,
};
static const struct of_device_id rcar_rst_matches[] __initconst = {
@ -38,11 +53,13 @@ static const struct of_device_id rcar_rst_matches[] __initconst = {
{ .compatible = "renesas,r8a7792-rst", .data = &rcar_rst_gen2 },
{ .compatible = "renesas,r8a7793-rst", .data = &rcar_rst_gen2 },
{ .compatible = "renesas,r8a7794-rst", .data = &rcar_rst_gen2 },
/* R-Car Gen3 is handled like R-Car Gen2 */
{ .compatible = "renesas,r8a7795-rst", .data = &rcar_rst_gen2 },
{ .compatible = "renesas,r8a7796-rst", .data = &rcar_rst_gen2 },
{ .compatible = "renesas,r8a77970-rst", .data = &rcar_rst_gen2 },
{ .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen2 },
/* R-Car Gen3 */
{ .compatible = "renesas,r8a7795-rst", .data = &rcar_rst_gen3 },
{ .compatible = "renesas,r8a7796-rst", .data = &rcar_rst_gen3 },
{ .compatible = "renesas,r8a77965-rst", .data = &rcar_rst_gen3 },
{ .compatible = "renesas,r8a77970-rst", .data = &rcar_rst_gen3 },
{ .compatible = "renesas,r8a77980-rst", .data = &rcar_rst_gen3 },
{ .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen3 },
{ /* sentinel */ }
};
@ -71,6 +88,14 @@ static int __init rcar_rst_init(void)
rcar_rst_base = base;
cfg = match->data;
saved_mode = ioread32(base + cfg->modemr);
if (cfg->configure) {
error = cfg->configure(base);
if (error) {
pr_warn("%pOF: Cannot run SoC specific configuration\n",
np);
goto out_put;
}
}
pr_debug("%pOF: MODE = 0x%08x\n", np, saved_mode);

View file

@ -254,7 +254,7 @@ finalize:
pm_genpd_init(genpd, gov, false);
}
static const struct of_device_id rcar_sysc_matches[] = {
static const struct of_device_id rcar_sysc_matches[] __initconst = {
#ifdef CONFIG_SYSC_R8A7743
{ .compatible = "renesas,r8a7743-sysc", .data = &r8a7743_sysc_info },
#endif
@ -284,9 +284,15 @@ static const struct of_device_id rcar_sysc_matches[] = {
#ifdef CONFIG_SYSC_R8A7796
{ .compatible = "renesas,r8a7796-sysc", .data = &r8a7796_sysc_info },
#endif
#ifdef CONFIG_SYSC_R8A77965
{ .compatible = "renesas,r8a77965-sysc", .data = &r8a77965_sysc_info },
#endif
#ifdef CONFIG_SYSC_R8A77970
{ .compatible = "renesas,r8a77970-sysc", .data = &r8a77970_sysc_info },
#endif
#ifdef CONFIG_SYSC_R8A77980
{ .compatible = "renesas,r8a77980-sysc", .data = &r8a77980_sysc_info },
#endif
#ifdef CONFIG_SYSC_R8A77995
{ .compatible = "renesas,r8a77995-sysc", .data = &r8a77995_sysc_info },
#endif

View file

@ -58,7 +58,9 @@ extern const struct rcar_sysc_info r8a7792_sysc_info;
extern const struct rcar_sysc_info r8a7794_sysc_info;
extern const struct rcar_sysc_info r8a7795_sysc_info;
extern const struct rcar_sysc_info r8a7796_sysc_info;
extern const struct rcar_sysc_info r8a77965_sysc_info;
extern const struct rcar_sysc_info r8a77970_sysc_info;
extern const struct rcar_sysc_info r8a77980_sysc_info;
extern const struct rcar_sysc_info r8a77995_sysc_info;

View file

@ -144,11 +144,21 @@ static const struct renesas_soc soc_rcar_m3_w __initconst __maybe_unused = {
.id = 0x52,
};
static const struct renesas_soc soc_rcar_m3_n __initconst __maybe_unused = {
.family = &fam_rcar_gen3,
.id = 0x55,
};
static const struct renesas_soc soc_rcar_v3m __initconst __maybe_unused = {
.family = &fam_rcar_gen3,
.id = 0x54,
};
static const struct renesas_soc soc_rcar_v3h __initconst __maybe_unused = {
.family = &fam_rcar_gen3,
.id = 0x56,
};
static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = {
.family = &fam_rcar_gen3,
.id = 0x58,
@ -209,9 +219,15 @@ static const struct of_device_id renesas_socs[] __initconst = {
#ifdef CONFIG_ARCH_R8A7796
{ .compatible = "renesas,r8a7796", .data = &soc_rcar_m3_w },
#endif
#ifdef CONFIG_ARCH_R8A77965
{ .compatible = "renesas,r8a77965", .data = &soc_rcar_m3_n },
#endif
#ifdef CONFIG_ARCH_R8A77970
{ .compatible = "renesas,r8a77970", .data = &soc_rcar_v3m },
#endif
#ifdef CONFIG_ARCH_R8A77980
{ .compatible = "renesas,r8a77980", .data = &soc_rcar_v3h },
#endif
#ifdef CONFIG_ARCH_R8A77995
{ .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 },
#endif