armv8: Add global variable resv_ram
Use gd->arch.resv_ram to track reserved memory allocation.
Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index b5609ff..b8b9cd5 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -277,6 +277,16 @@
clock, in another word SDHC_clk = Platform_clk / this_divider.
endmenu
+config RESV_RAM
+ bool
+ help
+ Reserve memory from the top, tracked by gd->arch.resv_ram. This
+ reserved RAM can be used by special driver that resides in memory
+ after U-Boot exits. It's up to implementation to allocate and allow
+ access to this reserved memory. For example, the reserved RAM can
+ be at the high end of physical memory. The reserve RAM may be
+ excluded from memory bank(s) passed to OS, or marked as reserved.
+
config SYS_FSL_ERRATUM_A008336
bool