[U-Boot] [PATCH 21/22][v3] armv8/fsl-lsch3: Support 256M mem split for MC & dbg-srvr

[Prabhakar Kushwaha]

 The agreed split of the top of memory is 256M for debug server and 256M
 for MC. This patch implements the split.

 In addition, the MC mem must be 512MB aligned, so the amount of memory
 to hide must be 512MB to achieve that alignment.

Signed-off-by: Stuart Yoder <stuart.yoder at freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
---
Changes for v2: sending as it is for patch set
Changes for v3: Added new macro's in README

 README                                  | 15 +++++++++++++++
 board/freescale/ls2085a/ls2085a.c       |  2 +-
 board/freescale/ls2085aqds/ls2085aqds.c |  2 +-
 board/freescale/ls2085ardb/ls2085ardb.c |  2 +-
 include/configs/ls2085a_common.h        | 12 +++++++++---
 5 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/README b/README
index 119bbc9..145f127 100644
--- a/README
+++ b/README
@@ -5059,6 +5059,21 @@ within that device.
 	normal addressable memory via the LBC. CONFIG_SYS_LS_MC_FW_ADDR is the
 	virtual address in NOR flash.
 
+Freescale Layerscape Debug Server Support:
+-------------------------------------------
+The Freescale Layerscape Debug Server Support supports the loading of
+"Debug Server firmware" and triggering SP boot-rom.
+This firmware often needs to be loaded during U-Boot booting.
+
+- CONFIG_FSL_DEBUG_SERVER
+	Enable the Debug Server for Layerscape SoCs.
+
+- CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE
+	Define minimum DDR size required for debug server image
+
+- CONFIG_SYS_MEM_TOP_HIDE_MIN
+	Define minimum DDR size to be hided from top of the DDR memory
+
 Building the Software:
 ======================
 
diff --git a/board/freescale/ls2085a/ls2085a.c b/board/freescale/ls2085a/ls2085a.c
index e43dd4c..73c4410 100644
--- a/board/freescale/ls2085a/ls2085a.c
+++ b/board/freescale/ls2085a/ls2085a.c
@@ -80,7 +80,7 @@ unsigned long get_dram_size_to_hide(void)
 	dram_to_hide += mc_get_dram_block_size();
 #endif
 
-	return dram_to_hide;
+	return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN);
 }
 
 int board_eth_init(bd_t *bis)
diff --git a/board/freescale/ls2085aqds/ls2085aqds.c b/board/freescale/ls2085aqds/ls2085aqds.c
index 9b57799..c492c7e 100644
--- a/board/freescale/ls2085aqds/ls2085aqds.c
+++ b/board/freescale/ls2085aqds/ls2085aqds.c
@@ -215,7 +215,7 @@ unsigned long get_dram_size_to_hide(void)
 	dram_to_hide += mc_get_dram_block_size();
 #endif
 
-	return dram_to_hide;
+	return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN);
 }
 
 #ifdef CONFIG_FSL_MC_ENET
diff --git a/board/freescale/ls2085ardb/ls2085ardb.c b/board/freescale/ls2085ardb/ls2085ardb.c
index 15cb251..1f8cf8a 100644
--- a/board/freescale/ls2085ardb/ls2085ardb.c
+++ b/board/freescale/ls2085ardb/ls2085ardb.c
@@ -212,7 +212,7 @@ unsigned long get_dram_size_to_hide(void)
 	dram_to_hide += mc_get_dram_block_size();
 #endif
 
-	return dram_to_hide;
+	return roundup(dram_to_hide, CONFIG_SYS_MEM_TOP_HIDE_MIN);
 }
 
 #ifdef CONFIG_FSL_MC_ENET
diff --git a/include/configs/ls2085a_common.h b/include/configs/ls2085a_common.h
index a33b8a9..214d790 100644
--- a/include/configs/ls2085a_common.h
+++ b/include/configs/ls2085a_common.h
@@ -163,21 +163,27 @@ unsigned long long get_qixis_addr(void);
 #define CONFIG_SYS_NAND_BASE_PHYS		0x30000000
 
 /* Debug Server firmware */
-#define CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE	(512UL * 1024 * 1024)
 /* 2 sec timeout */
 #define CONFIG_SYS_DEBUG_SERVER_TIMEOUT			(2 * 1000 * 1000)
 
 /* MC firmware */
 #define CONFIG_FSL_MC_ENET
-#define CONFIG_SYS_LS_MC_DRAM_BLOCK_MIN_SIZE	(512UL * 1024 * 1024)
 /* TODO Actual DPL max length needs to be confirmed with the MC FW team */
 #define CONFIG_SYS_LS_MC_DPC_MAX_LENGTH	    0x20000
 #define CONFIG_SYS_LS_MC_DRAM_DPC_OFFSET    0x00F00000
 #define CONFIG_SYS_LS_MC_DPL_MAX_LENGTH	    0x20000
 #define CONFIG_SYS_LS_MC_DRAM_DPL_OFFSET    0x00F20000
 
-/* Carve out a DDR region which will not be used by u-boot/Linux */
+/*
+ * Carve out a DDR region which will not be used by u-boot/Linux
+ *
+ * It will be used by MC and Debug Server. The MC region must be
+ * 512MB aligned, so the min size to hide is 512MB.
+ */
 #if defined(CONFIG_FSL_MC_ENET) || defined(CONFIG_FSL_DEBUG_SERVER)
+#define CONFIG_SYS_DEBUG_SERVER_DRAM_BLOCK_MIN_SIZE	(256UL * 1024 * 1024)
+#define CONFIG_SYS_LS_MC_DRAM_BLOCK_MIN_SIZE		(256UL * 1024 * 1024)
+#define CONFIG_SYS_MEM_TOP_HIDE_MIN			(512UL * 1024 * 1024)
 #define CONFIG_SYS_MEM_TOP_HIDE		get_dram_size_to_hide()
 #endif
 
-- 
1.9.1