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
diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h
index aee87cd..dfcbcce 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -59,6 +59,13 @@
phys_addr_t secure_ram;
unsigned long tlb_allocated;
#endif
+#ifdef CONFIG_RESV_RAM
+ /*
+ * Reserved RAM for memory resident, eg. Management Complex (MC)
+ * driver which continues to run after U-Boot exits.
+ */
+ phys_addr_t resv_ram;
+#endif
#ifdef CONFIG_ARCH_OMAP2
u32 omap_boot_device;
diff --git a/cmd/bdinfo.c b/cmd/bdinfo.c
index ae3027a..19b8fd8 100644
--- a/cmd/bdinfo.c
+++ b/cmd/bdinfo.c
@@ -392,6 +392,10 @@
gd->arch.secure_ram & MEM_RESERVE_SECURE_ADDR_MASK);
}
#endif
+#ifdef CONFIG_RESV_RAM
+ if (gd->arch.resv_ram)
+ print_num("Reserved ram", gd->arch.resv_ram);
+#endif
#if defined(CONFIG_CMD_NET) && !defined(CONFIG_DM_ETH)
print_eths();
#endif