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authorJonathan Zhang <jonzhang@fb.com>2019-07-16 14:37:23 -0700
committerPatrick Georgi <pgeorgi@google.com>2019-09-02 06:38:29 +0000
commitb5392f930d601c12db52d1f6428e1866fcfdcf86 (patch)
treeb4edc53430c85ac7050dfb7890039268feaff025 /src/drivers/vpd/Makefile.inc
parent4d9d964276d7030f36b36df4b6ba6d1f48a6a260 (diff)
downloadcoreboot-b5392f930d601c12db52d1f6428e1866fcfdcf86.tar.xz
drivers/vpd: add framework to search VPD in romstage
Summary: Added a framework to search VPD in romstage before memory is avilable. vpd_cbmem.c and vpd_premem.c are added for code specific for premem environment and for environment that cbmem can be used. Since global variable is forbidden in romstage. A CAR_GLOBAL variable is defined in vpd.c. This variable holds VPD binary blobs' base address and size from memory mapped flash. The overall flow is: * The CAR variable g_vpd_blob is initialized if it was not, either at romstage (before FSP-M execution in case of FSP UPD customization), or at ramstage. * At ramstage, during CBMEM_INIT, the VPD binary blob contents are copied into CBMEM. * At vpd_find() which may be called at romstage or at ramstage, it sets storage for a local struct vpd_blob variable. * The variable gets contents duplicated from g_vpd_blob, if vpd_find() is called at romstage. * The variable gets contents obtained from CBMEM, if vpd_find() is called at ramstage. Added a call vpd_get_bool(). Given a key/value pair in VPD binary blob, and name of a bool type variable, set the variable value if there is a match. Several checks are in place: * The key/value length needs to be correct. * The key name needs to match. * THe value is either '1' or '0'. Test Plan: * Build an OCP MonoLake coreboot image, flash and run. Tags: Signed-off-by: Jonathan Zhang <jonzhang@fb.com> Change-Id: Iebdba59419a555147fc40391cf17cc6879d9e1b2 Reviewed-on: https://review.coreboot.org/c/coreboot/+/34634 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Diffstat (limited to 'src/drivers/vpd/Makefile.inc')
-rw-r--r--src/drivers/vpd/Makefile.inc4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/drivers/vpd/Makefile.inc b/src/drivers/vpd/Makefile.inc
index 17019b599b..cc276e4968 100644
--- a/src/drivers/vpd/Makefile.inc
+++ b/src/drivers/vpd/Makefile.inc
@@ -1,2 +1,2 @@
-romstage-$(CONFIG_VPD) += vpd_decode.c
-ramstage-$(CONFIG_VPD) += vpd.c vpd_decode.c
+romstage-$(CONFIG_VPD) += vpd_decode.c vpd_premem.c vpd.c
+ramstage-$(CONFIG_VPD) += vpd_decode.c vpd_cbmem.c vpd.c