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| author | Pawel Moll <pawel.moll@arm.com> | 2012-07-11 20:07:25 +0400 |
|---|---|---|
| committer | Pawel Moll <pawel.moll@arm.com> | 2012-07-13 14:48:29 +0400 |
| commit | 1b820eaf42cde1df11d718909273611ee8e86ad0 (patch) | |
| tree | 23696596fd8cc08cf47cee8b923b1677c3fed90f /arch/arm/mach-vexpress/include/mach/debug-macro.S | |
| parent | 375faa93cbd8062317d17ddfa6d8fea75f3bbf9b (diff) | |
| download | linux-1b820eaf42cde1df11d718909273611ee8e86ad0.tar.xz | |
ARM: vexpress: Config option for early printk console
Versatile Express platform can be used in different configurations,
the console UART used by early printk may be located at different
addresses in the address space.
This patch makes it possible to select the base address of a PL011
UART to be used as a console output in the kernel configuration.
The default behaviour is still the heuristic detecting memory map
on Cortex-A core tiles.
The zImage decompressor will use the same configuration values
or print out nothing if DEBUG_LL is not enabled.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'arch/arm/mach-vexpress/include/mach/debug-macro.S')
| -rw-r--r-- | arch/arm/mach-vexpress/include/mach/debug-macro.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-vexpress/include/mach/debug-macro.S b/arch/arm/mach-vexpress/include/mach/debug-macro.S index fa8224794e0b..9f509f55d078 100644 --- a/arch/arm/mach-vexpress/include/mach/debug-macro.S +++ b/arch/arm/mach-vexpress/include/mach/debug-macro.S @@ -18,6 +18,8 @@ #define DEBUG_LL_VIRT_BASE 0xf8000000 +#if defined(CONFIG_DEBUG_VEXPRESS_UART0_DETECT) + .macro addruart,rp,rv,tmp @ Make an educated guess regarding the memory map: @@ -41,3 +43,42 @@ .endm #include <asm/hardware/debug-pl01x.S> + +#elif defined(CONFIG_DEBUG_VEXPRESS_UART0_CA9) + + .macro addruart,rp,rv,tmp + mov \rp, #DEBUG_LL_UART_OFFSET + orr \rv, \rp, #DEBUG_LL_VIRT_BASE + orr \rp, \rp, #DEBUG_LL_PHYS_BASE + .endm + +#include <asm/hardware/debug-pl01x.S> + +#elif defined(CONFIG_DEBUG_VEXPRESS_UART0_RS1) + + .macro addruart,rp,rv,tmp + mov \rp, #DEBUG_LL_UART_OFFSET_RS1 + orr \rv, \rp, #DEBUG_LL_VIRT_BASE + orr \rp, \rp, #DEBUG_LL_PHYS_BASE_RS1 + .endm + +#include <asm/hardware/debug-pl01x.S> + +#else /* CONFIG_DEBUG_LL_UART_NONE */ + + .macro addruart, rp, rv, tmp + /* Safe dummy values */ + mov \rp, #0 + mov \rv, #DEBUG_LL_VIRT_BASE + .endm + + .macro senduart,rd,rx + .endm + + .macro waituart,rd,rx + .endm + + .macro busyuart,rd,rx + .endm + +#endif |