Merge branch 'master' of git://git.denx.de/u-boot-nand-flash

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 20ba6502481728cfd81d7b8224f3d36c9851bd5e..cee8e2f1646d970bfe8ef8c3727978997e409ca6 100644 (file)
--- a/README
+++ b/README
@@ -139,12 +139,10 @@ Directory Hierarchy:
        /at91           Files specific to Atmel AT91RM9200 CPU
        /imx            Files specific to Freescale MC9328 i.MX CPUs
        /s3c24x0        Files specific to Samsung S3C24X0 CPUs
-      /arm925t         Files specific to ARM 925 CPUs
       /arm926ejs       Files specific to ARM 926 CPUs
       /arm1136         Files specific to ARM 1136 CPUs
       /ixp             Files specific to Intel XScale IXP CPUs
       /pxa             Files specific to Intel XScale PXA CPUs
-      /s3c44b0         Files specific to Samsung S3C44B0 CPUs
       /sa1100          Files specific to Intel StrongARM SA1100 CPUs
     /lib               Architecture specific library files
   /avr32               Files generic to AVR32 architecture
@@ -1409,6 +1407,12 @@ The following options need to be configured:
                CONFIG_DFU_NAND
                This enables support for exposing NAND devices via DFU.
 
+               CONFIG_DFU_RAM
+               This enables support for exposing RAM via DFU.
+               Note: DFU spec refer to non-volatile memory usage, but
+               allow usages beyond the scope of spec - here RAM usage,
+               one that would help mostly the developer.
+
                CONFIG_SYS_DFU_DATA_BUF_SIZE
                Dfu transfer uses a buffer before writing data to the
                raw storage device. Make the size (in bytes) of this buffer
@@ -5592,15 +5596,17 @@ On ARM, the following registers are used:
 
        R0:     function argument word/integer result
        R1-R3:  function argument word
-       R9:     GOT pointer
-       R10:    stack limit (used only if stack checking if enabled)
+       R9:     platform specific
+       R10:    stack limit (used only if stack checking is enabled)
        R11:    argument (frame) pointer
        R12:    temporary workspace
        R13:    stack pointer
        R14:    link register
        R15:    program counter
 
-    ==> U-Boot will use R8 to hold a pointer to the global data
+    ==> U-Boot will use R9 to hold a pointer to the global data
+
+    Note: on ARM, only R_ARM_RELATIVE relocations are supported.
 
 On Nios II, the ABI is documented here:
        http://www.altera.com/literature/hb/nios2/n2cpu_nii51016.pdf