esd/common/fpga.c: fix 'assignment of read-only location' error

[people/ms/u-boot.git] / README

diff --git a/README b/README
index a5ffbb5ad15cad1cf5faef53566562b0b5cabaf4..491397affc14cc37ff5460c9a9cd3adb08e0f862 100644 (file)
--- a/README
+++ b/README
@@ -3499,7 +3499,7 @@ GCC's implementation.
 
 For PowerPC, the following registers have specific use:
        R1:     stack pointer
-       R2:     TOC pointer
+       R2:     reserved for system use
        R3-R4:  parameter passing and return values
        R5-R10: parameter passing
        R13:    small data area pointer
@@ -3508,7 +3508,7 @@ For PowerPC, the following registers have specific use:
 
        (U-Boot also uses R14 as internal GOT pointer.)
 
-    ==> U-Boot will use R29 to hold a pointer to the global data
+    ==> U-Boot will use R2 to hold a pointer to the global data
 
     Note: on PPC, we could use a static initializer (since the
     address of the global data structure is known at compile time),
@@ -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