OvmfPkg: introduce the FD_SIZE_IN_KB macro / build flag

FD_SIZE_xMB defines have existed for flash size selection. They can be
passed as "-D FD_SIZE_xMB" on the command line. Passing multiple of them
at the same time has never been supported; earlier settings on the command
line cannot be overridden.

Introduce the integer valued FD_SIZE_IN_KB macro, which provides the
following improvements:

- several instances of it are permitted on the command line, with the last
  one taking effect,

- conditional statements in the DSC and FDF files need only check a single
  macro, and multiple values can be checked in a single !if with the ||
  operator,

- nested !ifdef / !else ladders can be replaced with flat equality tests,

- in the future, flash sizes can be expressed with a finer than MB
  granularity, if necessary.

For now, we're going to preserve the FD_SIZE_xMB defines as convenience
wrappers for FD_SIZE_IN_KB.

FD_SIZE_IN_KB is being added to the DSC files because this way we can
depend on it in both the DSC and FDF files.

Cc: Gary Ching-Pang Lin <glin@suse.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/OvmfPkg/OvmfPkg.fdf.inc b/OvmfPkg/OvmfPkg.fdf.inc
index 9cc0578d64..f12d61c2b6 100644
--- a/OvmfPkg/OvmfPkg.fdf.inc
+++ b/OvmfPkg/OvmfPkg.fdf.inc
@@ -15,18 +15,11 @@
 #

 ##

 

-#

-# Default flash size is 2MB.

-#

-# Defining FD_SIZE_1MB on the build command line can override this.

-#

-

 DEFINE BLOCK_SIZE        = 0x1000

 DEFINE VARS_SIZE         = 0x20000

 DEFINE VARS_BLOCKS       = 0x20

 

-!ifdef $(FD_SIZE_1MB)

-

+!if $(FD_SIZE_IN_KB) == 1024

 DEFINE FW_BASE_ADDRESS   = 0xFFF00000

 DEFINE FW_SIZE           = 0x00100000

 DEFINE FW_BLOCKS         = 0x100

@@ -36,9 +29,9 @@ DEFINE CODE_BLOCKS       = 0xE0
 DEFINE FVMAIN_SIZE       = 0x000CC000

 DEFINE SECFV_OFFSET      = 0x000EC000

 DEFINE SECFV_SIZE        = 0x14000

+!endif

 

-!else

-

+!if $(FD_SIZE_IN_KB) == 2048

 DEFINE FW_BASE_ADDRESS   = 0xFFE00000

 DEFINE FW_SIZE           = 0x00200000

 DEFINE FW_BLOCKS         = 0x200

@@ -48,7 +41,6 @@ DEFINE CODE_BLOCKS       = 0x1E0
 DEFINE FVMAIN_SIZE       = 0x001AC000

 DEFINE SECFV_OFFSET      = 0x001CC000

 DEFINE SECFV_SIZE        = 0x34000

-

 !endif

 

 SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress     = $(FW_BASE_ADDRESS)