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authorAlistair Popple <alistair@popple.id.au>2013-04-29 18:07:47 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-05-08 06:36:49 +1000
commit30650239adc9e4e9439256d6988e521518dccbb3 (patch)
tree2a4879c3742d62ea14dc3584988acbe0a10f6669 /arch/powerpc/include/asm/udbg.h
parent5737789c8340620d7b542d1d4e9b197de8eb2801 (diff)
downloadlinux-30650239adc9e4e9439256d6988e521518dccbb3.tar.bz2
powerpc: Add an in memory udbg console
This patch adds a new udbg early debug console which utilises statically defined input and output buffers stored within the kernel BSS. It is primarily designed to assist with bring up of new hardware which may not have a working console but which has a method of reading/writing kernel memory. This version incorporates comments made by Ben H (thanks!). Changes from v1: - Add memory barriers. - Ensure updating of read/write positions is atomic. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/udbg.h')
-rw-r--r--arch/powerpc/include/asm/udbg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h
index 5a7510e9d09d..dc590919f8eb 100644
--- a/arch/powerpc/include/asm/udbg.h
+++ b/arch/powerpc/include/asm/udbg.h
@@ -52,6 +52,7 @@ extern void __init udbg_init_40x_realmode(void);
extern void __init udbg_init_cpm(void);
extern void __init udbg_init_usbgecko(void);
extern void __init udbg_init_wsp(void);
+extern void __init udbg_init_memcons(void);
extern void __init udbg_init_ehv_bc(void);
extern void __init udbg_init_ps3gelic(void);
extern void __init udbg_init_debug_opal_raw(void);