| Message ID | 8004923e733fcc4adb930c7dfb6b0ca3fff42177.1694596125.git.ysato@users.sourceforge.jp (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Device Tree support for SH7751 based board | expand |
On Wed, Sep 13, 2023 at 11:24 AM Yoshinori Sato <ysato@users.sourceforge.jp> wrote: > 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@users.sourceforge.jp> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
diff --git a/arch/sh/boot/compressed/head_32.S b/arch/sh/boot/compressed/head_32.S index 7bb168133dbb..c5227ef636c3 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:
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@users.sourceforge.jp> --- arch/sh/boot/compressed/head_32.S | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)