armv8/ls2085a: Expose all DDR region(s) to Linux
This patch allows u-boot to expose the complete DDR region(s) to Linux
(after subtracting the memory hidden via MEM_TOP_HIDE mechanism).
This allows the u-boot to support the 48-bit VA support provided by
ARM64 Linux in flavors 3.18 and above, by passing the appropriate
'memory' DTS nodes.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma at freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/board/freescale/ls2085ardb/README b/board/freescale/ls2085ardb/README
index cfd5185..2f18243 100644
--- a/board/freescale/ls2085ardb/README
+++ b/board/freescale/ls2085ardb/README
@@ -107,3 +107,14 @@
---------------
a) NOR boot
b) NAND boot
+
+Booting Linux flavors which do not support 48-bit VA (< Linux 3.18)
+-------------------------------------------------------------------
+One needs to use appropriate bootargs to boot Linux flavors which do
+not support 48-bit VA (for e.g. < Linux 3.18) by appending mem=2048M, as shown
+below:
+
+=> setenv bootargs 'console=ttyS1,115200 root=/dev/ram
+ earlycon=uart8250,mmio,0x21c0600,115200 default_hugepagesz=2m hugepagesz=2m
+ hugepages=16 mem=2048M'
+
diff --git a/board/freescale/ls2085ardb/ls2085ardb.c b/board/freescale/ls2085ardb/ls2085ardb.c
index abe2114..15cb251 100644
--- a/board/freescale/ls2085ardb/ls2085ardb.c
+++ b/board/freescale/ls2085ardb/ls2085ardb.c
@@ -241,15 +241,18 @@
#ifdef CONFIG_OF_BOARD_SETUP
int ft_board_setup(void *blob, bd_t *bd)
{
- phys_addr_t base;
- phys_size_t size;
+ u64 base[CONFIG_NR_DRAM_BANKS];
+ u64 size[CONFIG_NR_DRAM_BANKS];
ft_cpu_setup(blob, bd);
- /* limit the memory size to bank 1 until Linux can handle 40-bit PA */
- base = getenv_bootm_low();
- size = getenv_bootm_size();
- fdt_fixup_memory(blob, (u64)base, (u64)size);
+ /* fixup DT for the two GPP DDR banks */
+ base[0] = gd->bd->bi_dram[0].start;
+ size[0] = gd->bd->bi_dram[0].size;
+ base[1] = gd->bd->bi_dram[1].start;
+ size[1] = gd->bd->bi_dram[1].size;
+
+ fdt_fixup_memory_banks(blob, base, size, 2);
#ifdef CONFIG_FSL_MC_ENET
fdt_fixup_board_enet(blob);