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authorAndrey Petrov <andrey.petrov@intel.com>2016-02-08 17:17:05 -0800
committerAaron Durbin <adurbin@chromium.org>2016-02-11 06:21:46 +0100
commitee9e4ae5bfbbb05ea34a2c2753c5517bcd3fb421 (patch)
treebbd1d105cac7abdf5673ed842665bc506d041c3f
parenta02bb653fdfdd0e1c0426d3573a979594a93eb58 (diff)
downloadcoreboot-ee9e4ae5bfbbb05ea34a2c2753c5517bcd3fb421.tar.xz
arch/x86: Reserve space for stack in CAR layout
Some platforms may want to use C code in bootblock so they need writable memory and CAR can be used for it. This change reserves memory in CAR that can be used by bootblock and other CAR stages. Change-Id: I8dec768cf8763dbe235f0ba1339079ebc49cbd9a Signed-off-by: Andrey Petrov <andrey.petrov@intel.com> Reviewed-on: https://review.coreboot.org/13640 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins)
-rw-r--r--src/arch/x86/car.ld8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/arch/x86/car.ld b/src/arch/x86/car.ld
index 191dcaf2aa..f29a465784 100644
--- a/src/arch/x86/car.ld
+++ b/src/arch/x86/car.ld
@@ -23,6 +23,14 @@
#if IS_ENABLED(CONFIG_SEPARATE_VERSTAGE)
VBOOT2_WORK(., 16K)
#endif
+ /* Stack for CAR stages. Since it persists across all stages that
+ * use CAR it can be reused. The chipset/SoC is expected to provide
+ * the stack size. */
+#if IS_ENABLED(CONFIG_C_ENVIRONMENT_BOOTBLOCK)
+ _car_stack_start = .;
+ . += CONFIG_DCACHE_BSP_STACK_SIZE;
+ _car_stack_end = .;
+#endif
/* The pre-ram cbmem console as well as the timestamp region are fixed
* in size. Therefore place them at the beginning .car.data section
* so that multiple stages (romstage and verstage) have a consistent