[U-Boot] [PATCH 16/36] rockchip: sdram-common: add api to pass dram info to trust os

[Kever Yang]

Trust OS decode this info like this:
https://github.com/ARM-software/arm-trusted-firmware/blob/master/plat/rockchip/common/drivers/parameter/ddr_parameter.c#L19
We have to set a available value, or else we get error info from
Trust OS like this:
"ERROR:   over or zero region, nr=3145987, max=10"

Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

 arch/arm/include/asm/arch-rockchip/sdram_common.h |  4 ++++
 arch/arm/mach-rockchip/sdram_common.c             | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/arch/arm/include/asm/arch-rockchip/sdram_common.h b/arch/arm/include/asm/arch-rockchip/sdram_common.h
index fec8586..55c6b81 100644
--- a/arch/arm/include/asm/arch-rockchip/sdram_common.h
+++ b/arch/arm/include/asm/arch-rockchip/sdram_common.h
@@ -55,4 +55,8 @@ size_t rockchip_sdram_size(phys_addr_t reg);
 
 /* Called by U-Boot board_init_r for Rockchip SoCs */
 int dram_init(void);
+
+/* Write ddr param to a known place for trustos */
+int rockchip_setup_ddr_param(struct ram_info *info);
+
 #endif
diff --git a/arch/arm/mach-rockchip/sdram_common.c b/arch/arm/mach-rockchip/sdram_common.c
index 76dbdc8..3a71f09 100644
--- a/arch/arm/mach-rockchip/sdram_common.c
+++ b/arch/arm/mach-rockchip/sdram_common.c
@@ -12,6 +12,15 @@
 #include <dm/uclass-internal.h>
 
 DECLARE_GLOBAL_DATA_PTR;
+struct ddr_param {
+	u32 count;
+	u32 reserved;
+	u64 bank_addr;
+	u64 bank_size;
+};
+
+#define PARAM_DRAM_INFO_OFFSET 0x2000000
+
 size_t rockchip_sdram_size(phys_addr_t reg)
 {
 	u32 rank, col, bk, cs0_row, cs1_row, bw, row_3_4;
@@ -81,3 +90,15 @@ ulong board_get_usable_ram_top(ulong total_size)
 
 	return (gd->ram_top > top) ? top : gd->ram_top;
 }
+
+int rockchip_setup_ddr_param(struct ram_info *info)
+{
+	struct ddr_param *dinfo = (struct ddr_param *)CONFIG_SYS_SDRAM_BASE +
+					PARAM_DRAM_INFO_OFFSET;
+
+	dinfo->count = 1;
+	dinfo->bank_addr = info->base;
+	dinfo->bank_size = info->size;
+
+	return 0;
+}
-- 
1.9.1