Merge branch 'next' of git://git.denx.de/u-boot-nios

1 files changed, 10 insertions, 5 deletions

diff --git a/README b/README
index 81692c0..68f1720 100644
--- a/README
+++ b/README
@@ -177,9 +177,6 @@ Directory Hierarchy:
   /mips			Files generic to MIPS architecture
     /cpu		CPU specific files
     /lib		Architecture specific library files
-  /nios			Files generic to Altera NIOS architecture
-    /cpu		CPU specific files
-    /lib		Architecture specific library files
   /nios2		Files generic to Altera NIOS2 architecture
     /cpu		CPU specific files
     /lib		Architecture specific library files
@@ -3337,8 +3334,8 @@ details; basically, the header defines the following image properties:
   Currently supported: Linux, NetBSD, VxWorks, QNX, RTEMS, LynxOS,
   INTEGRITY).
 * Target CPU Architecture (Provisions for Alpha, ARM, AVR32, Intel x86,
-  IA64, MIPS, NIOS, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
-  Currently supported: ARM, AVR32, Intel x86, MIPS, NIOS, PowerPC).
+  IA64, MIPS, Nios II, PowerPC, IBM S390, SuperH, Sparc, Sparc 64 Bit;
+  Currently supported: ARM, AVR32, Intel x86, MIPS, Nios II, PowerPC).
 * Compression Type (uncompressed, gzip, bzip2)
 * Load Address
 * Entry Point
@@ -4023,6 +4020,14 @@ On ARM, the following registers are used:
 
     ==> U-Boot will use R8 to hold a pointer to the global data
 
+On Nios II, the ABI is documented here:
+	http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf
+
+    ==> U-Boot will use gp to hold a pointer to the global data
+
+    Note: on Nios II, we give "-G0" option to gcc and don't use gp
+    to access small data sections, so gp is free.
+
 NOTE: DECLARE_GLOBAL_DATA_PTR must be used with file-global scope,
 or current versions of GCC may "optimize" the code too much.