xbmk: make all projects multi-tree

we currently distinguish, by virtue of logic, multi-
and single-tree projects. this introduces a lot of
complexity, so the following patch has removed this
distinction. all single-tree projects are now multi
tree, but with only one tree.

other design changes:

config/git removed. rev/tree now handled with mkhelper
and target configs. this allows per-tree remote handling,
so we could (for example) add the mrchromebox coreboot
fork easily, for specific chromebook models.

config/project is now config/module/project. this
cleans up the main config/ directory.

cfgname variable: .config no longer hardcoded when
doing configs in projects. it is configurable with
this variable. if unset, the previous .cfg is used

noconfig variable: set this in target/mkhelper
configs, and config/module/project/tree/config/ is
unused; instead, make is called without config copying.
a "noconfig" placeholder is used. this enables cleaner
usage of previously single-tree projects in the new
multi-tree-only structure.

cfgvars: variables reinitialised in project config are
cleaned more reliably. in particular, several variables
e.g. autogenargs were not being reset between projects,
although the autogenargs variable is currently unused.

general cleanup has been conducted across the build
system, as part of this redesign. several parts of the
build system more over-engineered as a result of the
previous design, and the new design enabled a severe
reduction in sloccount (75 lines reduced in lbmk).

yes, this change *adds features* but there are fewer
lines of code than before. this is the best kind of
change. way better than the 3-line-diff. yes.

rev= and tree= are set more centrally in configs. the
mkhelper config can be used to set url/url_bkup, but
individual trees can override them.

configs have been cleaned up, with several variables
now much more heavily centralised. config/git/ was
used before to first download the bare repository, and
then the real clone was made with patches. this allows
git repositories to be cached for future re-builds.

with config/git/ gone, the download logic for projects
is more centrally implemented. a separate call to ./mk -f
is no longer performed, and in fact ./mk -f never needs
to be used anymore as a result. ./mk -f now is basically
the same thing as -b, just without any action performed.

this change will allow rapid expansion of the libreboot
project. i want to add hundreds of chromebooks to the
project, using mrchromebox, but the previous design did
not permit this. this change means that i can easily have
unlimited upstreams per project. coreboot will, in some
follow-up changes, have the following upstreams:

coreboot/default: coreboot.org
coreboot/fam15h: 15h.org fork
coreboot/chromebook: mrchromebox fork

this can now be done freely without massive changes to
the build system. under the previous design, i worked on
a now-abandoned patch to do N remotes per project, reading
repo links from a file. this meant that i'd have coreboot.org
first (main and backup), then mrchromebox. this meant that
lbmk would failover through to mrchromebox, wasting time
for the user.

this new design is much cleaner, and will enable the
project to be maintained much more easily.

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 187 insertions, 0 deletions

diff --git a/config/module/coreboot/default/patches/0023-nb-intel-Disable-stack-overflow-debug-options.patch b/config/module/coreboot/default/patches/0023-nb-intel-Disable-stack-overflow-debug-options.patch
new file mode 100644
index 00000000..3bb55c37
--- /dev/null
+++ b/config/module/coreboot/default/patches/0023-nb-intel-Disable-stack-overflow-debug-options.patch
@@ -0,0 +1,187 @@
+From c7b136f1f4fa2bc1a783711b5a1ee82c5d9ce69f Mon Sep 17 00:00:00 2001
+From: Leah Rowe <leah@libreboot.org>
+Date: Mon, 21 Apr 2025 02:58:47 +0100
+Subject: [PATCH 23/48] nb/intel/*: Disable stack overflow debug options
+
+Signed-off-by: Leah Rowe <leah@libreboot.org>
+---
+ src/northbridge/intel/e7505/Kconfig       |  9 +++++++++
+ src/northbridge/intel/gm45/Kconfig        |  9 +++++++++
+ src/northbridge/intel/haswell/Kconfig     |  9 +++++++++
+ src/northbridge/intel/i440bx/Kconfig      | 13 +++++++++++++
+ src/northbridge/intel/i945/Kconfig        |  9 +++++++++
+ src/northbridge/intel/ironlake/Kconfig    |  9 +++++++++
+ src/northbridge/intel/pineview/Kconfig    |  9 +++++++++
+ src/northbridge/intel/sandybridge/Kconfig |  9 +++++++++
+ src/northbridge/intel/x4x/Kconfig         |  9 +++++++++
+ 9 files changed, 85 insertions(+)
+
+diff --git a/src/northbridge/intel/e7505/Kconfig b/src/northbridge/intel/e7505/Kconfig
+index 039a7396f8..ddcb986f10 100644
+--- a/src/northbridge/intel/e7505/Kconfig
++++ b/src/northbridge/intel/e7505/Kconfig
+@@ -7,3 +7,12 @@ config NORTHBRIDGE_INTEL_E7505
+ 	select NO_CBFS_MCACHE
+ 	select SMM_TSEG
+ 	select NEED_SMALL_2MB_PAGE_TABLES
++
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
+diff --git a/src/northbridge/intel/gm45/Kconfig b/src/northbridge/intel/gm45/Kconfig
+index 35e89b0c88..c5456d0ddf 100644
+--- a/src/northbridge/intel/gm45/Kconfig
++++ b/src/northbridge/intel/gm45/Kconfig
+@@ -58,4 +58,13 @@ config FIXED_DMIBAR_MMIO_BASE
+ config FIXED_EPBAR_MMIO_BASE
+ 	default 0xfed19000
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+diff --git a/src/northbridge/intel/haswell/Kconfig b/src/northbridge/intel/haswell/Kconfig
+index c57f1ec380..0a5181b183 100644
+--- a/src/northbridge/intel/haswell/Kconfig
++++ b/src/northbridge/intel/haswell/Kconfig
+@@ -10,6 +10,15 @@ config NORTHBRIDGE_INTEL_HASWELL
+ 
+ if NORTHBRIDGE_INTEL_HASWELL
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ config USE_NATIVE_RAMINIT
+ 	bool "[NOT COMPLETE] Use native raminit"
+ 	default n
+diff --git a/src/northbridge/intel/i440bx/Kconfig b/src/northbridge/intel/i440bx/Kconfig
+index dbb2d7436b..5e9418b6a9 100644
+--- a/src/northbridge/intel/i440bx/Kconfig
++++ b/src/northbridge/intel/i440bx/Kconfig
+@@ -19,3 +19,16 @@ config SDRAMPWR_4DIMM
+ 	  If your board has 4 DIMM slots, you must use select this option, in
+ 	  your Kconfig file of the board. On boards with 3 DIMM slots,
+ 	  do _not_ select this option.
++
++if NORTHBRIDGE_INTEL_I440BX
++
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
++endif
+diff --git a/src/northbridge/intel/i945/Kconfig b/src/northbridge/intel/i945/Kconfig
+index c4e17f90bf..b12f5be091 100644
+--- a/src/northbridge/intel/i945/Kconfig
++++ b/src/northbridge/intel/i945/Kconfig
+@@ -89,4 +89,13 @@ config FIXED_DMIBAR_MMIO_BASE
+ config FIXED_EPBAR_MMIO_BASE
+ 	default 0xfed19000
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+diff --git a/src/northbridge/intel/ironlake/Kconfig b/src/northbridge/intel/ironlake/Kconfig
+index 39566a6e5f..f46acf6937 100644
+--- a/src/northbridge/intel/ironlake/Kconfig
++++ b/src/northbridge/intel/ironlake/Kconfig
+@@ -63,4 +63,13 @@ config FIXED_DMIBAR_MMIO_BASE
+ config FIXED_EPBAR_MMIO_BASE
+ 	default 0xfed19000
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+diff --git a/src/northbridge/intel/pineview/Kconfig b/src/northbridge/intel/pineview/Kconfig
+index a05b866dad..50e3a7cdb9 100644
+--- a/src/northbridge/intel/pineview/Kconfig
++++ b/src/northbridge/intel/pineview/Kconfig
+@@ -42,4 +42,13 @@ config FIXED_EPBAR_MMIO_BASE
+ config DOMAIN_RESOURCE_32BIT_LIMIT
+ 	default 0xfec00000
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+diff --git a/src/northbridge/intel/sandybridge/Kconfig b/src/northbridge/intel/sandybridge/Kconfig
+index 9972a43da0..fe4ac5106c 100644
+--- a/src/northbridge/intel/sandybridge/Kconfig
++++ b/src/northbridge/intel/sandybridge/Kconfig
+@@ -208,4 +208,13 @@ config IGD_DEFAULT_UMA_INDEX
+ 	default 2 if IGD_DEFAULT_UMA_SIZE_96MB
+ 	default 3 if IGD_DEFAULT_UMA_SIZE_128MB
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+diff --git a/src/northbridge/intel/x4x/Kconfig b/src/northbridge/intel/x4x/Kconfig
+index 646af3510b..069fa0244d 100644
+--- a/src/northbridge/intel/x4x/Kconfig
++++ b/src/northbridge/intel/x4x/Kconfig
+@@ -53,4 +53,13 @@ config FIXED_DMIBAR_MMIO_BASE
+ config FIXED_EPBAR_MMIO_BASE
+ 	default 0xfed19000
+ 
++# Override DEBUG Kconfig to avoid false alarm about stack overflow.
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS
++      bool
++      default n
++
++config DEBUG_STACK_OVERFLOW_BREAKPOINTS_IN_ALL_STAGES
++      bool
++      default n
++
+ endif
+-- 
+2.47.3
+