commit d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3
author David Gibson <david@gibson.dropbear.id.au> Tue May 08 12:59:31 2007 +1000
committer Paul Mackerras <paulus@samba.org> Tue May 08 14:47:33 2007 +1000
tree 5704be539afcd6f29b1f5751476c8b4f53673bff
parent f6dfc80554b27da11dbb36ebae166b23ec3aa9ca

[POWERPC] Early serial debug support for PPC44x

This adds support for early serial debugging via the built in
port on IBM/AMCC PowerPC 44x CPUs.  It uses a bolted TLB entry in
address space 1 for the UART's mapping, allowing robust debugging both
before and after the initialization of the MMU.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/Kconfig.debug

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 86aa374..f70e795 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -139,10 +139,6 @@
 	  Say Y here to see progress messages from the boot firmware in text
 	  mode. Requires either BootX or Open Firmware.
 
-config SERIAL_TEXT_DEBUG
-	bool "Support for early boot texts over serial port"
-	depends on 4xx
-
 config PPC_EARLY_DEBUG
 	bool "Early debugging (dangerous)"
 
@@ -207,6 +203,24 @@
 	help
 	  Select this to enable early debugging for Celleb with Beat.
 
+config PPC_EARLY_DEBUG_44x
+	bool "Early serial debugging for IBM/AMCC 44x CPUs"
+	depends on 44x
+	select PPC_UDBG_16550
+	help
+	  Select this to enable early debugging for IBM 44x chips via the
+	  inbuilt serial port.
+
 endchoice
 
+config PPC_EARLY_DEBUG_44x_PHYSLOW
+	hex "Low 32 bits of early debug UART physical address"
+	depends PPC_EARLY_DEBUG_44x
+	default "0x40000200"
+
+config PPC_EARLY_DEBUG_44x_PHYSHIGH
+	hex "EPRN of early debug UART physical address"
+	depends PPC_EARLY_DEBUG_44x
+	default "0x1"
+
 endmenu