[U-Boot] [PATCH] Enable expression support for CONFIG_BOARD_SIZE_LIMIT

[Fabio Estevam]

Hi Wolfgang,

On Tue, Dec 4, 2018 at 1:40 PM Wolfgang Denk <wd at denx.de> wrote:
>
> So far, the use of CONFIG_BOARD_SIZE_LIMIT would only work with
> plain numeric constants.  Extend it to allow for expressions, so one
> can for example use
>
>         #define CONFIG_BOARD_SIZE_LIMIT (768 << 10)
>
> in the board configuration.
>
> Signed-off-by: Wolfgang Denk <wd at denx.de>

Still not working for me. I do see a warning now:

  LD      spl/u-boot-spl
/bin/sh: 1: arithmetic expression: expecting primary: ""((768 - 69) * 1024)""
  COPY    u-boot.bin
  MKIMAGE u-boot.img
  OBJCOPY spl/u-boot-spl-nodtb.bin
  COPY    spl/u-boot-spl.bin
  CFGS    spl/u-boot-spl.cfgout
  MKIMAGE SPL
  CFGCHK  u-boot.cfg

It does allow the build to proceed, but it is not really detecting the
overlap anymore.

For example: let's force the overlap by setting a very small
CONFIG_BOARD_SIZE_LIMIT of only 1K:

#define CONFIG_ENV_OFFSET (768 * 1024)
#define CONFIG_BOARD_SIZE_LIMIT (1 * 1024)

/bin/sh: 1: arithmetic expression: expecting primary: ""(1 * 1024)""
  COPY    u-boot.bin
  MKIMAGE u-boot.img
  LD      spl/drivers/usb/gadget/built-in.o
  LD      spl/drivers/built-in.o
  LD      spl/u-boot-spl
  OBJCOPY spl/u-boot-spl-nodtb.bin
  COPY    spl/u-boot-spl.bin
  CFGS    spl/u-boot-spl.cfgout
  MKIMAGE SPL
  CFGCHK  u-boot.cfg

It still allowed a successful build, but it should have thrown an
error about the overlap.