[U-Boot] [PATCH v2 01/10] armv8: Add global variable resv_ram

[York Sun]

Use gd->arch.resv_ram to track reserved memory allocation.

Signed-off-by: York Sun <york.sun at nxp.com>
---

Changes in v2: None

 arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 6 ++++++
 arch/arm/include/asm/global_data.h        | 3 +++
 cmd/bdinfo.c                              | 4 ++++
 3 files changed, 13 insertions(+)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index adccdf1..a40556f 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -273,6 +273,12 @@ config SYS_FSL_SDHC_CLK_DIV
 	  clock, in another word SDHC_clk = Platform_clk / this_divider.
 endmenu
 
+config RESV_RAM_TOP
+	bool
+	help
+	  Reserve memory from the top, tracked by gd->arch.resv_ram. It's up
+	  to implementation to allow access to this reserved memory or not.
+
 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..b1fc410 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -59,6 +59,9 @@ struct arch_global_data {
 	phys_addr_t secure_ram;
 	unsigned long tlb_allocated;
 #endif
+#ifdef CONFIG_RESV_RAM_TOP
+	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..0c5fa56 100644
--- a/cmd/bdinfo.c
+++ b/cmd/bdinfo.c
@@ -392,6 +392,10 @@ static int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc,
 			  gd->arch.secure_ram & MEM_RESERVE_SECURE_ADDR_MASK);
 	}
 #endif
+#ifdef CONFIG_RESV_RAM_TOP
+	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
-- 
2.7.4