X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=491397affc14cc37ff5460c9a9cd3adb08e0f862;hb=f5614e7926863bf0225ec860d9b319741a9c4004;hp=f2a4914923876bead95b28d8d55caf3c87221353;hpb=b423d055cc2e13c4ef1f0389c3fa2988d0eed818;p=oweals%2Fu-boot.git

diff --git a/README b/README
index f2a4914923..491397affc 100644
--- a/README
+++ b/README
@@ -136,8 +136,10 @@ Directory Hierarchy:
   - i386	Files specific to i386 CPUs
   - ixp		Files specific to Intel XScale IXP CPUs
   - mcf52x2	Files specific to Freescale ColdFire MCF52x2 CPUs
+  - mcf5227x	Files specific to Freescale ColdFire MCF5227x CPUs
   - mcf532x	Files specific to Freescale ColdFire MCF5329 CPUs
   - mcf5445x	Files specific to Freescale ColdFire MCF5445x CPUs
+  - mcf547x_8x	Files specific to Freescale ColdFire MCF547x_8x CPUs
   - mips	Files specific to MIPS CPUs
   - mpc5xx	Files specific to Freescale MPC5xx  CPUs
   - mpc5xxx	Files specific to Freescale MPC5xxx CPUs
@@ -1377,6 +1379,14 @@ The following options need to be configured:
 		SPI configuration items (port pins to use, etc). For
 		an example, see include/configs/sacsng.h.
 
+		CONFIG_HARD_SPI
+
+		Enables a hardware SPI driver for general-purpose reads
+		and writes.  As with CONFIG_SOFT_SPI, the board configuration
+		must define a list of chip-select function pointers.
+		Currently supported on some MPC8xxx processors.  For an
+		example, see include/configs/mpc8349emds.h.
+
 - FPGA Support: CONFIG_FPGA
 
 		Enables FPGA subsystem.
@@ -2691,6 +2701,10 @@ Some configuration options can be set using Environment Variables:
 		  => setenv ethact SCC ETHERNET
 		  => ping 10.0.0.1 # traffic sent on SCC ETHERNET
 
+  ethrotate	- When set to "no" U-Boot does not go through all
+		  available network interfaces.
+		  It just stays at the currently selected interface.
+
    netretry	- When set to "no" each network operation will
 		  either succeed or fail without retrying.
 		  When set to "once" the network operation will
@@ -2699,6 +2713,9 @@ Some configuration options can be set using Environment Variables:
 		  Useful on scripts which control the retry operation
 		  themselves.
 
+  npe_ucode	- see CONFIG_IXP4XX_NPE_EXT_UCOD
+		  if set load address for the npe microcode
+
   tftpsrcport	- If this is set, the value is used for TFTP's
 		  UDP source port.
 
@@ -3482,7 +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
@@ -3491,7 +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),
@@ -3500,6 +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