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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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30
arch/arm/mach-davinci/include/mach/uncompress.h
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@@ -43,37 +43,27 @@ static inline void flush(void)
barrier();
}
static inline void set_uart_info(u32 phys, void * __iomem virt)
static inline void set_uart_info(u32 phys)
{
/*
* Get address of some.bss variable and round it down
* a la CONFIG_AUTO_ZRELADDR.
*/
u32 ram_start = (u32)&uart & 0xf8000000;
u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS);
uart = (u32 *)phys;
uart_info[0] = phys;
uart_info[1] = (u32)virt;
}
#define _DEBUG_LL_ENTRY(machine, phys, virt) \
if (machine_is_##machine()) { \
set_uart_info(phys, virt); \
break; \
#define _DEBUG_LL_ENTRY(machine, phys) \
{ \
if (machine_is_##machine()) { \
set_uart_info(phys); \
break; \
} \
}
#define DEBUG_LL_DAVINCI(machine, port) \
_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \
IO_ADDRESS(DAVINCI_UART##port##_BASE))
_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE)
#define DEBUG_LL_DA8XX(machine, port) \
_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \
IO_ADDRESS(DA8XX_UART##port##_BASE))
_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE)
#define DEBUG_LL_TNETV107X(machine, port) \
_DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \
TNETV107X_UART##port##_VIRT)
_DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE)
static inline void __arch_decomp_setup(unsigned long arch_id)
{