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authorMike Frysinger <vapier@gentoo.org>2008-02-04 19:26:54 -0500
committerMike Frysinger <vapier@gentoo.org>2008-02-04 19:26:54 -0500
commit4c58eb5552220e425c8af6ac8d2839244a2f57b1 (patch)
tree4c98c4e1f2511d3f15c88e439c3af4e2991e1de4 /README
parent32a9f5f2160a034ea87ea651b233ef7c635e55cf (diff)
add some more Blackfin docs
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'README')
-rw-r--r--README5
1 files changed, 5 insertions, 0 deletions
diff --git a/README b/README
index a5ffbb5ad15..d4afcfafea7 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