env: Rework ENV_IS_EMBEDDED and related logic slightly

- Drop CONFIG_BUILD_ENVCRC as this is never set directly but instead
  means ENV_IS_EMBEDDED, so reference that in code and rename the Makefile
  usage to BUILD_ENVCRC.
- Remove extra-$(CONFIG_ENV_IS_EMBEDDED) line as it could never be true,
  and likely why there is an extra- line for CONFIG_ENV_IS_IN_FLASH (the
  only use case today of embedded environments).
- With these slight changes we can then see that using the calculated
  symbol of ENV_IS_EMBEDDED is the right thing to use in any code which
  needs to know this situation and can remove CONFIG_ENV_IS_EMBEDDED
  entirely.

Signed-off-by: Tom Rini <trini@konsulko.com>

README

@@ -1542,11 +1542,6 @@ The following definitions that deal with the placement and management
 of environment data (variable area); in general, we support the
 following configurations:
 
-- CONFIG_BUILD_ENVCRC:
-
-	Builds up envcrc with the target environment so that external utils
-	may easily extract it and embed it in final U-Boot images.
-
 BE CAREFUL! The first access to the environment happens quite early
 in U-Boot initialization (when we try to get the setting of for the
 console baudrate). You *MUST* have mapped your NVRAM area then, or

env/Makefile

@@ -11,7 +11,6 @@ obj-$(CONFIG_$(SPL_TPL_)ENV_SUPPORT) += flags.o
 ifndef CONFIG_SPL_BUILD
 obj-y += callback.o
 obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
-extra-$(CONFIG_ENV_IS_EMBEDDED) += embedded.o
 obj-$(CONFIG_ENV_IS_IN_EEPROM) += embedded.o
 extra-$(CONFIG_ENV_IS_IN_FLASH) += embedded.o
 obj-$(CONFIG_ENV_IS_IN_NVRAM) += embedded.o

env/embedded.c

@@ -27,7 +27,7 @@
  * Generate embedded environment table
  * inside U-Boot image, if needed.
  */
-#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC)
+#if defined(ENV_IS_EMBEDDED)
 /*
  * Put the environment in the .text section when we are building
  * U-Boot proper.  The host based program "tools/envcrc" does not need

include/env_internal.h

@@ -41,10 +41,6 @@
 	(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
 #  define ENV_IS_EMBEDDED
 # endif
-# ifdef CONFIG_ENV_IS_EMBEDDED
-#  error "do not define CONFIG_ENV_IS_EMBEDDED in your board config"
-#  error "it is calculated automatically for you"
-# endif
 #endif	/* CONFIG_ENV_IS_IN_FLASH */
 
 #if defined(CONFIG_ENV_IS_IN_NAND)
@@ -57,23 +53,6 @@ extern unsigned long nand_env_oob_offset;
 # endif /* CONFIG_ENV_OFFSET_OOB */
 #endif /* CONFIG_ENV_IS_IN_NAND */
 
-/*
- * For the flash types where embedded env is supported, but it cannot be
- * calculated automatically (i.e. NAND), take the board opt-in.
- */
-#if defined(CONFIG_ENV_IS_EMBEDDED) && !defined(ENV_IS_EMBEDDED)
-# define ENV_IS_EMBEDDED
-#endif
-
-/* The build system likes to know if the env is embedded */
-#ifdef DO_DEPS_ONLY
-# ifdef ENV_IS_EMBEDDED
-#  ifndef CONFIG_ENV_IS_EMBEDDED
-#   define CONFIG_ENV_IS_EMBEDDED
-#  endif
-# endif
-#endif
-
 #include "compiler.h"
 
 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
@@ -88,7 +67,7 @@ extern unsigned long nand_env_oob_offset;
  * If the environment is in RAM, allocate extra space for it in the malloc
  * region.
  */
-#if defined(CONFIG_ENV_IS_EMBEDDED)
+#if defined(ENV_IS_EMBEDDED)
 #define TOTAL_MALLOC_LEN	CONFIG_SYS_MALLOC_LEN
 #elif (CONFIG_ENV_ADDR + CONFIG_ENV_SIZE < CONFIG_SYS_MONITOR_BASE) || \
       (CONFIG_ENV_ADDR >= CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) || \

tools/Makefile

@@ -36,21 +36,20 @@ endif
 subdir-$(HOST_TOOLS_ALL) += gdb
 
 # Merge all the different vars for envcrc into one
-ENVCRC-$(CONFIG_ENV_IS_EMBEDDED) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_EEPROM) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_FLASH) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_ONENAND) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_NAND) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_NVRAM) = y
 ENVCRC-$(CONFIG_ENV_IS_IN_SPI_FLASH) = y
-CONFIG_BUILD_ENVCRC ?= $(ENVCRC-y)
+BUILD_ENVCRC ?= $(ENVCRC-y)
 
 hostprogs-$(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER) += atmel_pmecc_params
 
 hostprogs-$(CONFIG_VIDEO_LOGO) += bmp_logo
 HOSTCFLAGS_bmp_logo.o := -pedantic
 
-hostprogs-$(CONFIG_BUILD_ENVCRC) += envcrc
+hostprogs-$(BUILD_ENVCRC) += envcrc
 envcrc-objs := envcrc.o lib/crc32.o env/embedded.o lib/sha1.o
 
 hostprogs-$(CONFIG_CMD_NET) += gen_eth_addr

tools/envcrc.c

@@ -40,10 +40,6 @@
 # endif
 #endif	/* CONFIG_ENV_IS_IN_FLASH */
 
-#if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
-# define CONFIG_BUILD_ENVCRC
-#endif
-
 #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
 # define ENV_HEADER_SIZE	(sizeof(uint32_t) + 1)
 #else
@@ -53,17 +49,17 @@
 #define ENV_SIZE (CONFIG_ENV_SIZE - ENV_HEADER_SIZE)
 
 
-#ifdef CONFIG_BUILD_ENVCRC
+#ifdef ENV_IS_EMBEDDED
 # include <env_internal.h>
 extern unsigned int env_size;
 extern env_t embedded_environment;
-#endif	/* CONFIG_BUILD_ENVCRC */
+#endif	/* ENV_IS_EMBEDDED */
 
 extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int);
 
 int main (int argc, char **argv)
 {
-#ifdef CONFIG_BUILD_ENVCRC
+#ifdef ENV_IS_EMBEDDED
 	unsigned char pad = 0x00;
 	uint32_t crc;
 	unsigned char *envptr = (unsigned char *)&embedded_environment,