diff options
| author | Julien Grall <julien.grall@linaro.org> | 2013-04-28 20:14:12 +0100 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-05-13 12:00:01 +0100 |
| commit | 53a0714c81b1584f1fe41e13b1a05dca632f6509 (patch) | |
| tree | 79fa9a97fc26df8b7358c12a5aeb3d401c5475c9 /xen/include/asm-arm/config.h | |
| parent | 237c94508b149af506e20dd1ad8bcd57b49201f9 (diff) | |
| download | xen-53a0714c81b1584f1fe41e13b1a05dca632f6509.tar.gz xen-53a0714c81b1584f1fe41e13b1a05dca632f6509.tar.bz2 xen-53a0714c81b1584f1fe41e13b1a05dca632f6509.zip | |
xen/arm: Don't use pl011 UART by default for early printk
Add CONFIG_EARLY_PRINTK options in configs/arm{32,64}.mk to let the user
to choose if he wants to have early output, ie before the console is initialized.
This code is specific for each UART. When CONFIG_EARLY_PRINTK is enabled,
Xen will only be able to run on a board with this UART.
If a developper wants to add support for a new UART, he must implement the
following assembly macro/define:
- EALY_UART_BASE_ADDRESS: variable which contains the physical base address
for the UART
- early_uart_init: initialize the UART
- early_uart_ready: check and wait until the UART can transmit a new
character
- early_uart_transmit: transmit a character
For more details about the parameters of each function,
see arm{32,64}/debug-pl011.inc comments.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'xen/include/asm-arm/config.h')
| -rw-r--r-- | xen/include/asm-arm/config.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h index 75992027ff..6414c895b7 100644 --- a/xen/include/asm-arm/config.h +++ b/xen/include/asm-arm/config.h @@ -141,8 +141,6 @@ extern unsigned long frametable_virt_end; #define watchdog_disable() ((void)0) #define watchdog_enable() ((void)0) -/* Board-specific: base address of PL011 UART */ -#define EARLY_UART_ADDRESS 0x1c090000 /* Board-specific: base address of GIC + its regs */ #define GIC_BASE_ADDRESS 0x2c000000 #define GIC_DR_OFFSET 0x1000 |