Enable xcc build for all platform

[xiulipan]

Fix xcc build for BYT/CHT/HSW/BDW/SUE
Improve the optimization level to reduce TEXT size in FW.
Fix void pointer arithmetic in hifi2 build.
Update xcc build config for all existing platforms.

[xiulipan]

@jajanusz @tlauda Could you help to check the build fail for the BYT, CHT, BDW, HSW and SUE.
Error for BYT, CHT

/home/pxl/xcc/install/tools/RD-2012.5-linux/XtensaTools/bin/xt-ld: sof section `.text' will not fit in region `sof_text_start'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memset':
/home/pxl/work/sof/sof/src/lib/lib.c:56: undefined reference to `__vec_memcpy'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memcpy_s':
/home/pxl/work/sof/sof/src/arch/xtensa/include/arch/string.h:58: undefined reference to `__vec_memcpy'

BDW, HSW

CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memset':
/home/pxl/work/sof/sof/src/lib/lib.c:56: undefined reference to `__vec_memcpy'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memcpy_s':
/home/pxl/work/sof/sof/src/arch/xtensa/include/arch/string.h:58: undefined reference to `__vec_memcpy'
/home/pxl/work/sof/sof/build_bdw_xcc/haswell.x:140: undefined symbol `XCHAL_VECBASE_RESET_PADDR' referenced in expression

SUE

/home/pxl/xcc/install/tools/RG-2017.8-linux/XtensaTools/bin/xt-ld: bootloader section `.text' will not fit in region `sof_text'

[jajanusz]

@jajanusz @tlauda Could you help to check the build fail for the BYT, CHT, BDW, HSW and SUE.
Error for BYT, CHT

/home/pxl/xcc/install/tools/RD-2012.5-linux/XtensaTools/bin/xt-ld: sof section `.text' will not fit in region `sof_text_start'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memset':
/home/pxl/work/sof/sof/src/lib/lib.c:56: undefined reference to `__vec_memcpy'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memcpy_s':
/home/pxl/work/sof/sof/src/arch/xtensa/include/arch/string.h:58: undefined reference to `__vec_memcpy'

BDW, HSW

CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memset':
/home/pxl/work/sof/sof/src/lib/lib.c:56: undefined reference to `__vec_memcpy'
CMakeFiles/sof.dir/src/lib/lib.c.o: In function `memcpy_s':
/home/pxl/work/sof/sof/src/arch/xtensa/include/arch/string.h:58: undefined reference to `__vec_memcpy'
/home/pxl/work/sof/sof/build_bdw_xcc/haswell.x:140: undefined symbol `XCHAL_VECBASE_RESET_PADDR' referenced in expression

SUE

/home/pxl/xcc/install/tools/RG-2017.8-linux/XtensaTools/bin/xt-ld: bootloader section `.text' will not fit in region `sof_text'

Error says pretty much what problem is, .text section is too small to fit generated binary code. You need to tune memory.h in platform/{baytrail,haswell}.

[tlauda]

@xiulipan And also __vec_memcpy is probably not supported on HIFI2, so you need to add additional check in string.h in xtensa arch.

[xiulipan]

@jajanusz @tlauda Thanks for hint.
Can we merge this PR first so that we can have unify test env for the fix?

[tlauda]

@xiulipan Don't you want to add fixes into this PR first?

[xiulipan]

@tlauda @jajanusz And some fix and pass the test locally.
Please check.

[xiulipan]

@tlauda @jajanusz @macchian @lbetlej
Update the PR with optimization level change and hifi2 fix for void pointer arithmetic

[plbossart]

@xiulipan the IRAM sizes look wrong to me. we've always used 14000

e.g.

#define SST_BYT_IRAM_PHY_START	0xff2c0000
#define SST_BYT_IRAM_PHY_END	0xff2d4000
#define SST_BYT_DRAM_PHY_START	0xff300000
#define SST_BYT_DRAM_PHY_END	0xff320000

[xiulipan]

@xiulipan the IRAM sizes look wrong to me. we've always used 14000

e.g.

#define SST_BYT_IRAM_PHY_START	0xff2c0000
#define SST_BYT_IRAM_PHY_END	0xff2d4000
#define SST_BYT_DRAM_PHY_START	0xff300000
#define SST_BYT_DRAM_PHY_END	0xff320000

@plbossart @tlauda already correct me here, so we try to use -Os flag to avoid the issue.

@lgirdwood The -Os is just a test for my build test. I think I got @jajanusz help to have different optimization level with #2054
Will try to tune the default value for different build and compiler.

[libinyang]

@xiulipan I saw your patches changes some default value in common file. Will it impact on gcc build?

[jajanusz]

@xiulipan I saw your patches changes some default value in common file. Will it impact on gcc build?

These XTENSA_* variables are not used by GCC, only XCC toolchain is controlled by env variables

[lgirdwood]

@xiulipan any ETA for landing this ?

[xiulipan]

@lrgirdwo Hope I can do that in this week. Still need to figure out how to switch the optimization level by default.

[jajanusz]

@lrgirdwo Hope I can do that in this week. Still need to figure out how to switch the optimization level by default.

Just add CONFIG_OPTIMIZE_FOR_SIZE=y in baytrail_defconfig ;)

[xiulipan]

@lrgirdwo @jajanusz updated to add CONFIG_OPTIMIZE_FOR_SIZE=y in baytrail_xcc_defconfig

All xcc build pass on byt cht bdw hsw apl skl kbl cnl icl jsl with local test.

[lgirdwood]

Can we roll this now int CI so that it builds using XCC and has download links for binaries (using community key) and ldc files.

[tlauda]

@xiulipan @lgirdwood Is this ready to be merged?

[lgirdwood]

@tlauda yep, if you approve it. We only have 1 approver atm. me.

Changes applied.