X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=91dfb24776e185986788603ad055da9d218a689b;hb=ac57e2b013ce88bcf124accc4c7c8f3429c3032c;hp=b08ad8904dafc1690f53dec65caf7c0a4309696b;hpb=9f53146f396d9def8013e29e105729c1f42ae037;p=oweals%2Fu-boot.git

diff --git a/README b/README
index b08ad8904d..91dfb24776 100644
--- a/README
+++ b/README
@@ -83,7 +83,7 @@ Where we come from:
   * Provide extended interface to Linux boot loader
   * S-Record download
   * network boot
-  * PCMCIA / CompactFlash / ATA disk / SCSI ... boot
+  * ATA disk / SCSI ... boot
 - create ARMBoot project (http://sourceforge.net/projects/armboot)
 - add other CPU families (starting with ARM)
 - create U-Boot project (http://sourceforge.net/projects/u-boot)
@@ -267,6 +267,13 @@ board_init_f():
 	- preloader_console_init() can be called here in extremis
 	- should set up SDRAM, and anything needed to make the UART work
 	- these is no need to clear BSS, it will be done by crt0.S
+	- for specific scenarios on certain architectures an early BSS *can*
+	  be made available (via CONFIG_SPL_EARLY_BSS by moving the clearing
+	  of BSS prior to entering board_init_f()) but doing so is discouraged.
+	  Instead it is strongly recommended to architect any code changes
+	  or additions such to not depend on the availability of BSS during
+	  board_init_f() as indicated in other sections of this README to
+	  maintain compatibility and consistency across the entire code base.
 	- must return normally from this function (don't call board_init_r()
 		directly)
 
@@ -2976,7 +2983,7 @@ Low Level (hardware related) configuration options:
 - CONFIG_SYS_SRIOn_MEM_VIRT:
 		Virtual Address of SRIO port 'n' memory region
 
-- CONFIG_SYS_SRIOn_MEM_PHYS:
+- CONFIG_SYS_SRIOn_MEM_PHYxS:
 		Physical Address of SRIO port 'n' memory region
 
 - CONFIG_SYS_SRIOn_MEM_SIZE:
@@ -3075,14 +3082,16 @@ Low Level (hardware related) configuration options:
 		instruction cache) is still performed.
 
 - CONFIG_SPL_BUILD
-		Modifies the behaviour of start.S when compiling a loader
-		that is executed before the actual U-Boot. E.g. when
-		compiling a NAND SPL.
+		Set when the currently-running compilation is for an artifact
+		that will end up in the SPL (as opposed to the TPL or U-Boot
+		proper). Code that needs stage-specific behavior should check
+		this.
 
 - CONFIG_TPL_BUILD
-		Modifies the behaviour of start.S  when compiling a loader
-		that is executed after the SPL and before the actual U-Boot.
-		It is loaded by the SPL.
+		Set when the currently-running compilation is for an artifact
+		that will end up in the TPL (as opposed to the SPL or U-Boot
+		proper). Code that needs stage-specific behavior should check
+		this.
 
 - CONFIG_SYS_MPC85XX_NO_RESETVEC
 		Only for 85xx systems. If this variable is specified, the section
@@ -3299,7 +3308,7 @@ Testing of U-Boot Modifications, Ports to New Hardware, etc.:
 If you have modified U-Boot sources (for instance added a new board
 or support for new devices, a new CPU, etc.) you are expected to
 provide feedback to the other developers. The feedback normally takes
-the form of a "patch", i. e. a context diff against a certain (latest
+the form of a "patch", i.e. a context diff against a certain (latest
 official or latest in the git repository) version of U-Boot sources.
 
 But before you submit such a patch, please verify that your modifi-
@@ -3421,6 +3430,8 @@ List of environment variables (most likely not complete):
 		  allowed for use by the bootm command. See also "bootm_low"
 		  environment variable.
 
+  bootstopkeysha256, bootdelaykey, bootstopkey	- See README.autoboot
+
   updatefile	- Location of the software update file on a TFTP server, used
 		  by the automatic software update feature. Please refer to
 		  documentation in doc/README.update for more details.