X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=README;h=8cfa92fac9e54eedf72c1dd0f5a325f61297c12c;hb=1f47e2aca42c2e51ff3a7754c717ee13f568c721;hp=b493ffeb2d9dc143ab5f90c8ab10b1fa8d0d6f18;hpb=db289a9d746c5f4ee36002a25303da111f6365e7;p=oweals%2Fu-boot.git

diff --git a/README b/README
index b493ffeb2d..8cfa92fac9 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)
 
@@ -2453,7 +2460,7 @@ typically in board_init_f() and board_init_r().
 Configuration Settings:
 -----------------------
 
-- CONFIG_SYS_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit.
+- MEM_SUPPORT_64BIT_DATA: Defined automatically if compiled as 64-bit.
 		Optionally it can be defined to support 64-bit memory commands.
 
 - CONFIG_SYS_LONGHELP: Defined when you want long help messages included;
@@ -2863,32 +2870,6 @@ Low Level (hardware related) configuration options:
 		If this macro is defined, then CONFIG_SYS_CCSRBAR_PHYS will be
 		forced to a value that ensures that CCSR is not relocated.
 
-- Floppy Disk Support:
-		CONFIG_SYS_FDC_DRIVE_NUMBER
-
-		the default drive number (default value 0)
-
-		CONFIG_SYS_ISA_IO_STRIDE
-
-		defines the spacing between FDC chipset registers
-		(default value 1)
-
-		CONFIG_SYS_ISA_IO_OFFSET
-
-		defines the offset of register from address. It
-		depends on which part of the data bus is connected to
-		the FDC chipset. (default value 0)
-
-		If CONFIG_SYS_ISA_IO_STRIDE CONFIG_SYS_ISA_IO_OFFSET and
-		CONFIG_SYS_FDC_DRIVE_NUMBER are undefined, they take their
-		default value.
-
-		if CONFIG_SYS_FDC_HW_INIT is defined, then the function
-		fdc_hw_init() is called at the beginning of the FDC
-		setup. fdc_hw_init() must be provided by the board
-		source code. It is used to make hardware-dependent
-		initializations.
-
 - CONFIG_IDE_AHB:
 		Most IDE controllers were designed to be connected with PCI
 		interface. Only few of them were designed for AHB interface.
@@ -2976,7 +2957,7 @@ 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:
@@ -3044,7 +3025,7 @@ Low Level (hardware related) configuration options:
 		Add the "loopw" memory command. This only takes effect if
 		the memory commands are activated globally (CONFIG_CMD_MEMORY).
 
-- CONFIG_MX_CYCLIC
+- CONFIG_CMD_MX_CYCLIC
 		Add the "mdc" and "mwc" memory commands. These are cyclic
 		"md/mw" commands.
 		Examples:
@@ -3075,14 +3056,16 @@ 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 +3282,7 @@ 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-