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Date: Thu, 4 Apr 2024 13:59:26 +0900 From: Yoshinori Sato <ysato@...rs.sourceforge.jp> To: linux-sh@...r.kernel.org Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>, Damien Le Moal <dlemoal@...nel.org>, Niklas Cassel <cassel@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, Geert Uytterhoeven <geert+renesas@...der.be>, Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, Thomas Gleixner <tglx@...utronix.de>, Bjorn Helgaas <bhelgaas@...gle.com>, Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kw@...ux.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jiri Slaby <jirislaby@...nel.org>, Magnus Damm <magnus.damm@...il.com>, Daniel Lezcano <daniel.lezcano@...aro.org>, Rich Felker <dalias@...c.org>, John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, Lee Jones <lee@...nel.org>, Helge Deller <deller@....de>, Heiko Stuebner <heiko.stuebner@...rry.de>, Shawn Guo <shawnguo@...nel.org>, Sebastian Reichel <sre@...nel.org>, Chris Morgan <macromorgan@...mail.com>, Linus Walleij <linus.walleij@...aro.org>, Arnd Bergmann <arnd@...db.de>, David Rientjes <rientjes@...gle.com>, Hyeonggon Yoo <42.hyeyoo@...il.com>, Vlastimil Babka <vbabka@...e.cz>, Baoquan He <bhe@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Guenter Roeck <linux@...ck-us.net>, Kefeng Wang <wangkefeng.wang@...wei.com>, Stephen Rothwell <sfr@...b.auug.org.au>, Javier Martinez Canillas <javierm@...hat.com>, Guo Ren <guoren@...nel.org>, Azeem Shaikh <azeemshaikh38@...il.com>, Max Filippov <jcmvbkbc@...il.com>, Jonathan Corbet <corbet@....net>, Jacky Huang <ychuang3@...oton.com>, Herve Codina <herve.codina@...tlin.com>, Manikanta Guntupalli <manikanta.guntupalli@....com>, Anup Patel <apatel@...tanamicro.com>, Biju Das <biju.das.jz@...renesas.com>, Uwe Kleine-König <u.kleine-koenig@...gutronix.de>, Sam Ravnborg <sam@...nborg.org>, Sergey Shtylyov <s.shtylyov@....ru>, Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, linux-ide@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org, dri-devel@...ts.freedesktop.org, linux-pci@...r.kernel.org, linux-serial@...r.kernel.org, linux-fbdev@...r.kernel.org Subject: [PATCH v7 01/37] sh: passing FDT address to kernel startup. R4 is caller saved in SH ABI. Save it so it doesn't get corrupted until it's needed for initialization. Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be> --- arch/sh/boot/compressed/head_32.S | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S index 7bb168133dbb..6be59851122e 100644 --- a/arch/sh/boot/compressed/head_32.S +++ b/arch/sh/boot/compressed/head_32.S @@ -15,7 +15,8 @@ startup: /* Load initial status register */ mov.l init_sr, r1 ldc r1, sr - + /* Save FDT address */ + mov r4, r13 /* Move myself to proper location if necessary */ mova 1f, r0 mov.l 1f, r2 @@ -84,7 +85,7 @@ l1: /* Jump to the start of the decompressed kernel */ mov.l kernel_start_addr, r0 jmp @r0 - nop + mov r13, r4 .align 2 bss_start_addr: -- 2.39.2
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