From 4c58eb5552220e425c8af6ac8d2839244a2f57b1 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Mon, 4 Feb 2008 19:26:54 -0500 Subject: add some more Blackfin docs Signed-off-by: Mike Frysinger --- README | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'README') diff --git a/README b/README index a5ffbb5ad..d4afcfafe 100644 --- a/README +++ b/README @@ -3517,6 +3517,11 @@ For PowerPC, the following registers have specific use: average for all boards 752 bytes for the whole U-Boot image, 624 text + 127 data). +On Blackfin, the normal C ABI (except for P5) is followed as documented here: + http://docs.blackfin.uclinux.org/doku.php?id=application_binary_interface + + ==> U-Boot will use P5 to hold a pointer to the global data + On ARM, the following registers are used: R0: function argument word/integer result -- cgit v1.2.3