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ARM: davinci: implement DEBUG_LL port choice

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Apart from the necessity to do this change for multi-platform kernels
the previous logic depended on the zImage decompressor to write the
physical and virtual address to a magic memory location.
If the decompressor is unused or not correctly configured for the
current machid, the addruart macro was an infinite loop. Moreover
debugging the early zImage code was not possible either.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[nsekhar@ti.com: add braces in _DEBUG_LL_ENTRY() macro to fix checkpatch
error. Fix debug port choice config dependency for traditional DaVincis.
Modify debug port config names and add help text.]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Uwe Kleine-König
2012-03-22 10:29:23 +01:00
committed by Sekhar Nori
parent d48b97b403
commit 477099f189
5 changed files with 60 additions and 69 deletions
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10
arch/arm/mach-davinci/include/mach/serial.h
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@@ -15,16 +15,6 @@
#include <mach/hardware.h>
/*
* Stolen area that contains debug uart physical and virtual addresses. These
* addresses are filled in by the uncompress.h code, and are used by the debug
* macros in debug-macro.S.
*
* This area sits just below the page tables (see arch/arm/kernel/head.S).
* We define it as a relative offset from start of usable RAM.
*/
#define DAVINCI_UART_INFO_OFS 0x3ff8
#define DAVINCI_UART0_BASE (IO_PHYS + 0x20000)
#define DAVINCI_UART1_BASE (IO_PHYS + 0x20400)
#define DAVINCI_UART2_BASE (IO_PHYS + 0x20800)