* Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> [100430 13:50]: > Tony Lindgren <tony@xxxxxxxxxxx> writes: > > > Zoom2 and 3 have UARTs only on the external debug board. > > GPMC needs to be mapped early to use it for DEBUG_LL. > > > > Additionally, 0xfb000000 overlaps with other areas, so > > use 0xfa400000 for the virtual address instead. > > > > Note that with the pending serial.c patches you need to > > set console=ttyS0,115200n8 as it will be the only UART > > mapped. To use DEBUG_LL, you need to pass also earlyprintk > > in cmdline. > > > > Cc: Allen Pais <allen.pais@xxxxxx> > > Cc: Vikram Pandita <vikram.pandita@xxxxxx> > > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> > > --- > > arch/arm/kernel/head.S | 10 ++++++++++ > > arch/arm/mach-omap2/board-zoom-debugboard.c | 2 +- > > arch/arm/mach-omap2/include/mach/debug-macro.S | 4 ++-- > > arch/arm/mach-omap2/io.c | 9 +++++++++ > > arch/arm/plat-omap/include/plat/serial.h | 2 +- > > 5 files changed, 23 insertions(+), 4 deletions(-) > > > > diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S > > index eb62bf9..fd870e1 100644 > > --- a/arch/arm/kernel/head.S > > +++ b/arch/arm/kernel/head.S > > @@ -328,6 +328,16 @@ __create_page_tables: > > add r0, r4, #0xd8000000 >> 18 > > str r3, [r0] > > #endif > > +#if defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3) > > + /* > > + * Zoom2 and Zoom3 have UARTs only on the debug board. > > + * The debug board is connected to the GPMC. > > + */ > > + add r0, r4, #0xfa000000 >> 18 > > + orr r0, r0, #0x00400000 >> 18 @ ZOOM_UART_VIRT > > + orr r3, r7, #0x10000000 @ ZOOM_UART_BASE > > + str r3, [r0] > > +#endif > > I don't see why this part is needed. The same mapping is done using > the .io_pg_offset in the machine description which is done just before > this in head.S That mapping does not cover the GPMC area where this UART is. Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
