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ARM: zx: add low level debug support for zx296702 

Use the UART0 peripheral for low level debug. Only the UART port 0 is
currently supported.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Jun Nie 2015-04-28 17:18:07 +08:00 committed by Arnd Bergmann
parent acede515b3
commit 58d0398535
2 changed files with 21 additions and 0 deletions
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14
arch/arm/Kconfig.debug
View File

@ -1166,6 +1166,18 @@ choice
For more details about semihosting, please see
chapter 8 of DUI0203I_rvct_developer_guide.pdf from ARM Ltd.
config DEBUG_ZTE_ZX
bool "Use ZTE ZX UART"
select DEBUG_UART_PL01X
depends on ARCH_ZX
help
Say Y here if you are enabling ZTE ZX296702 SOC and need
debug uart support.
This option is preferred over the platform specific
options; the platform specific options are deprecated
and will be soon removed.
config DEBUG_LL_UART_8250
bool "Kernel low-level debugging via 8250 UART"
help
@ -1346,6 +1358,7 @@ config DEBUG_UART_PHYS
default 0x02531000 if DEBUG_KEYSTONE_UART1
default 0x03010fe0 if ARCH_RPC
default 0x07000000 if DEBUG_SUN9I_UART0
default 0x09405000 if DEBUG_ZTE_ZX
default 0x10009000 if DEBUG_REALVIEW_STD_PORT || \
DEBUG_VEXPRESS_UART0_CA9
default 0x1010c000 if DEBUG_REALVIEW_PB1176_PORT
@ -1477,6 +1490,7 @@ config DEBUG_UART_VIRT
default 0xfb009000 if DEBUG_REALVIEW_STD_PORT
default 0xfb10c000 if DEBUG_REALVIEW_PB1176_PORT
default 0xfc40ab00 if DEBUG_BRCMSTB_UART
default 0xfc705000 if DEBUG_ZTE_ZX
default 0xfcfe8600 if DEBUG_UART_BCM63XX
default 0xfd000000 if ARCH_SPEAR3XX || ARCH_SPEAR6XX
default 0xfd000000 if ARCH_SPEAR13XX

7
arch/arm/include/debug/pl01x.S
View File

@ -12,6 +12,13 @@
*/
#include <linux/amba/serial.h>
#ifdef CONFIG_DEBUG_ZTE_ZX
#undef UART01x_DR
#undef UART01x_FR
#define UART01x_DR 0x04
#define UART01x_FR 0x14
#endif
#ifdef CONFIG_DEBUG_UART_PHYS
.macro addruart, rp, rv, tmp
ldr \rp, =CONFIG_DEBUG_UART_PHYS