Hello Masahiro, I tried to test this on Trats2(Exynos4412) with required files from the linux and the code doesn't build.
On 08/17/2014 08:16 AM, Masahiro Yamada wrote:
U-Boot does not have arch/arm/kernel, include/uapi directories, This commit copies files as follows:
Location in Linux -> Location in U-Boot
arch/arm/kernel/debug.S -> arch/arm/lib/debug.S arch/arm/include/debug/8250.S -> arch/arm/include/debug/8250.S include/uapi/linux/serial_reg.h -> include/linux/serial_reg.h
Signed-off-by: Masahiro Yamada yamada.m@jp.panasonic.com
diff --git a/arch/arm/lib/debug.S b/arch/arm/lib/debug.S new file mode 100644 index 0000000..14f7c3b --- /dev/null +++ b/arch/arm/lib/debug.S @@ -0,0 +1,138 @@ +/*
- linux/arch/arm/kernel/debug.S
- Copyright (C) 1994-1999 Russell King
- 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.
- 32-bit debugging code
- */
+#include <linux/linkage.h> +#include <asm/assembler.h>
.text+/*
- Some debugging routines (useful if you've got MM problems and
- printk isn't working). For DEBUGGING ONLY!!! Do not leave
- references to these in a production kernel!
- */
+#if !defined(CONFIG_DEBUG_SEMIHOSTING) +#include CONFIG_DEBUG_LL_INCLUDE +#endif
+#ifdef CONFIG_MMU
This config: "CONFIG_MMU" is nowhere defined in the u-boot. U-boot uses (n)def CONFIG_SYS_DCACHE_OFF - for enable/disable the mmu in ARM.
But when I do the change like this: -#ifdef CONFIG_MMU +#ifndef CONFIG_SYS_DCACHE_OFF
Then I got the data abort, after use a printch(). But without this change the printch() function works fine (after the uart init).
.macro addruart_current, rx, tmp1, tmp2addruart \tmp1, \tmp2, \rxmrc p15, 0, \rx, c1, c0tst \rx, #1moveq \rx, \tmp1movne \rx, \tmp2.endm+#else /* !CONFIG_MMU */
.macro addruart_current, rx, tmp1, tmp2addruart \rx, \tmp1
Generates build error: This asm macro: "addruart" gets 3 arguments but in this place got only two. After fix - works fine. It's strange, no one use this in the kernel before?
And moreover I think that functions declarations are welcome for this code.
Best regards,