use C code rather than inline assembly

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 09eb76fe4528dfedca027b119ac760fce2570e35..d4afcfafea74c8d6bcf2f7253d77f169d1e4eb84 100644 (file)
--- 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
@@ -235,9 +237,7 @@ The following options need to be configured:
 - Board Type:  Define exactly one, e.g. CONFIG_MPC8540ADS.
 
 - CPU Daughterboard Type: (if CONFIG_ATSTK1000 is defined)
-               Define exactly one of
-               CONFIG_ATSTK1002
-
+               Define exactly one, e.g. CONFIG_ATSTK1002
 
 - CPU Module Type: (if CONFIG_COGENT is defined)
                Define exactly one of
@@ -926,7 +926,7 @@ The following options need to be configured:
                (i.e. setenv videomode 317; saveenv; reset;)
 
                - "videomode=bootargs" all the video parameters are parsed
-               from the bootargs. (See drivers/videomodes.c)
+               from the bootargs. (See drivers/video/videomodes.c)
 
 
                CONFIG_VIDEO_SED13806
@@ -1355,7 +1355,7 @@ The following options need to be configured:
                CONFIG_FSL_I2C
 
                Define this option if you want to use Freescale's I2C driver in
-               drivers/fsl_i2c.c.
+               drivers/i2c/fsl_i2c.c.
 
 
 - SPI Support: CONFIG_SPI
@@ -1379,14 +1379,31 @@ The following options need to be configured:
                SPI configuration items (port pins to use, etc). For
                an example, see include/configs/sacsng.h.
 
-- FPGA Support: CONFIG_FPGA_COUNT
+               CONFIG_HARD_SPI
 
-               Specify the number of FPGA devices to support.
+               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.
+
+               CONFIG_FPGA_<vendor>
+
+               Enables support for specific chip vendors.
+               (ALTERA, XILINX)
+
+               CONFIG_FPGA_<family>
 
-               CONFIG_FPGA
+               Enables support for FPGA family.
+               (SPARTAN2, SPARTAN3, VIRTEX2, CYCLONE2, ACEX1K, ACEX)
 
-               Used to specify the types of FPGA devices.  For example,
-               #define CONFIG_FPGA  CFG_XILINX_VIRTEX2
+               CONFIG_FPGA_COUNT
+
+               Specify the number of FPGA devices to support.
 
                CFG_FPGA_PROG_FEEDBACK
 
@@ -2123,7 +2140,7 @@ to save the current settings.
        to be a good choice since it makes it far enough from the
        start of the data area as well as from the stack pointer.
 
-Please note that the environment is read-only as long as the monitor
+Please note that the environment is read-only until the monitor
 has been relocated to RAM and a RAM copy of the environment has been
 created; also, when using EEPROM you will have to use getenv_r()
 until then to read environment variables.
@@ -2271,6 +2288,10 @@ Low Level (hardware related) configuration options:
                enable I2C microcode relocation patch (MPC8xx);
                define relocation offset in DPRAM [DSP2]
 
+- CFG_SMC_UCODE_PATCH, CFG_SMC_DPMEM_OFFSET [0x1FC0]:
+               enable SMC microcode relocation patch (MPC8xx);
+               define relocation offset in DPRAM [SMC1]
+
 - CFG_SPI_UCODE_PATCH, CFG_SPI_DPMEM_OFFSET [0x1FC0]:
                enable SPI microcode relocation patch (MPC8xx);
                define relocation offset in DPRAM [SCC4]
@@ -2680,6 +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
@@ -2688,6 +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.
 
@@ -3489,6 +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