Hello, On Wednesday, March 21, 2012 10:14 AM Thomas Abraham wrote: > On 14 March 2012 20:12, Kukjin Kim <kgene.kim@xxxxxxxxxxx> wrote: > > Actually, the base address of uart is different between EXYNOS4 > > and EXYNOS5 and this patch enables to support uart for EXYNOS4 > > and EXYNOS5 SoCs at runtime. > > > > Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx> > > --- > > [...] > > > diff --git a/arch/arm/mach-exynos/include/mach/debug-macro.S b/arch/arm/mach- > exynos/include/mach/debug-macro.S > > index 6cacf16..6c857ff 100644 > > --- a/arch/arm/mach-exynos/include/mach/debug-macro.S > > +++ b/arch/arm/mach-exynos/include/mach/debug-macro.S > > @@ -21,8 +21,13 @@ > > */ > > > > .macro addruart, rp, rv, tmp > > - ldr \rp, = S3C_PA_UART > > - ldr \rv, = S3C_VA_UART > > + mov \rp, #0x10000000 > > This is physical address of Exynos4/5 CPUID register which cannot be > used here. And virtual address S5P_VA_CPUID also cannot be used here > since this will be called before paging_init when earlyprintk boot > param is used. So, with this change, earlyprintk does not work for > both Exynos4 and Exynos5. I confirm, printascii freeze the system on EXYNOS4 after that patch, tested on Exynos4210 Nuri board. Best regards -- Marek Szyprowski Samsung Poland R&D Center -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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