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ARM: OMAP2+: am33xx: Add low level debugging support

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Add support for low level debugging on AM335X EVM (AM33XX family).
Currently only support for UART1 console, which is used on AM335X EVM
is added.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Afzal Mohammed 2012-05-10 14:23:01 +05:30 committed by Tony Lindgren
parent f8f5701bda
commit d0a9001dce
3 changed files with 26 additions and 1 deletions
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17
arch/arm/mach-omap2/include/mach/debug-macro.S
View file

@ -72,6 +72,8 @@ omap_uart_lsr: .word 0
beq 82f @ configure UART2
cmp \rp, #TI81XXUART3 @ ti81Xx UART offsets different
beq 83f @ configure UART3
cmp \rp, #AM33XXUART1 @ AM33XX UART offsets different
beq 84f @ configure UART1
cmp \rp, #ZOOM_UART @ only on zoom2/3
beq 95f @ configure ZOOM_UART
@ -100,7 +102,9 @@ omap_uart_lsr: .word 0
b 98f
83: mov \rp, #UART_OFFSET(TI81XX_UART3_BASE)
b 98f
84: ldr \rp, =AM33XX_UART1_BASE
and \rp, \rp, #0x00ffffff
b 97f
95: ldr \rp, =ZOOM_UART_BASE
str \rp, [\tmp, #0] @ omap_uart_phys
ldr \rp, =ZOOM_UART_VIRT
@ -109,6 +113,17 @@ omap_uart_lsr: .word 0
str \rp, [\tmp, #8] @ omap_uart_lsr
b 10b
/* AM33XX: Store both phys and virt address for the uart */
97: add \rp, \rp, #0x44000000 @ phys base
str \rp, [\tmp, #0] @ omap_uart_phys
sub \rp, \rp, #0x44000000 @ phys base
add \rp, \rp, #0xf9000000 @ virt base
str \rp, [\tmp, #4] @ omap_uart_virt
mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
str \rp, [\tmp, #8] @ omap_uart_lsr
b 10b
/* Store both phys and virt address for the uart */
98: add \rp, \rp, #0x48000000 @ phys base
str \rp, [\tmp, #0] @ omap_uart_phys

4
arch/arm/plat-omap/include/plat/serial.h
View file

@ -60,6 +60,9 @@
/* AM3505/3517 UART4 */
#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */
/* AM33XX serial port */
#define AM33XX_UART1_BASE 0x44E09000
/* External port on Zoom2/3 */
#define ZOOM_UART_BASE 0x10000000
#define ZOOM_UART_VIRT 0xfa400000
@ -93,6 +96,7 @@
#define TI81XXUART1 81
#define TI81XXUART2 82
#define TI81XXUART3 83
#define AM33XXUART1 84
#define ZOOM_UART 95 /* Only on zoom2/3 */
/* This is only used by 8250.c for omap1510 */

6
arch/arm/plat-omap/include/plat/uncompress.h
View file

@ -103,6 +103,10 @@ static inline void flush(void)
_DEBUG_LL_ENTRY(mach, TI81XX_UART##p##_BASE, OMAP_PORT_SHIFT, \
TI81XXUART##p)
#define DEBUG_LL_AM33XX(p, mach) \
_DEBUG_LL_ENTRY(mach, AM33XX_UART##p##_BASE, OMAP_PORT_SHIFT, \
AM33XXUART##p)
static inline void __arch_decomp_setup(unsigned long arch_id)
{
int port = 0;
@ -183,6 +187,8 @@ static inline void __arch_decomp_setup(unsigned long arch_id)
/* TI8148 base boards using UART1 */
DEBUG_LL_TI81XX(1, ti8148evm);
/* AM33XX base boards using UART1 */
DEBUG_LL_AM33XX(1, am335xevm);
} while (0);
}