RE: [PATCH v2 2/2] ram: sifive: Avoid using hardcoded ram base and size

Hi Bin,

-----Original Message----- From: Bin Meng bmeng.cn@gmail.com Sent: 20 July 2020 11:37 To: Rick Chen rick@andestech.com; Pragnesh Patel pragnesh.patel@sifive.com; Sagar Kadam sagar.kadam@sifive.com; U- Boot Mailing List u-boot@lists.denx.de Cc: Bin Meng bin.meng@windriver.com Subject: [PATCH v2 2/2] ram: sifive: Avoid using hardcoded ram base and size

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From: Bin Meng bin.meng@windriver.com

At present the SiFive FU540 RAM driver uses hard-coded memory base address and size to initialize the DDR controller. This may not be true when this driver is used on another board based on FU540.

Update the driver to read the memory information from DT and use that during the initialization.

Signed-off-by: Bin Meng bin.meng@windriver.com

Changes in v2:

• Change to use fdtdec_setup_mem_size_base() API
• Drop the 2 patches that added a new API in fdtdec

drivers/ram/sifive/fu540_ddr.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/ram/sifive/fu540_ddr.c b/drivers/ram/sifive/fu540_ddr.c index f8f8ca9..2eef1e7 100644 --- a/drivers/ram/sifive/fu540_ddr.c +++ b/drivers/ram/sifive/fu540_ddr.c @@ -8,6 +8,7 @@

#include <common.h> #include <dm.h> +#include <fdtdec.h> #include <init.h> #include <ram.h> #include <regmap.h> @@ -39,9 +40,6 @@ #define DENALI_PHY_1152 1152 #define DENALI_PHY_1214 1214

-#define PAYLOAD_DEST 0x80000000 -#define DDR_MEM_SIZE (8UL * 1024UL * 1024UL * 1024UL)

#define DRAM_CLASS_OFFSET 8 #define DRAM_CLASS_DDR4 0xA #define OPTIMAL_RMODW_EN_OFFSET 0 @@ -65,6 +63,8 @@ #define PHY_RX_CAL_DQ0_0_OFFSET 0 #define PHY_RX_CAL_DQ1_0_OFFSET 16

+DECLARE_GLOBAL_DATA_PTR;

struct fu540_ddrctl { volatile u32 denali_ctl[265]; }; @@ -235,8 +235,8 @@ static int fu540_ddr_setup(struct udevice *dev) struct fu540_ddr_params *params = &plat->ddr_params; volatile u32 *denali_ctl = priv->ctl->denali_ctl; volatile u32 *denali_phy = priv->phy->denali_phy;

•   const u64 ddr_size = DDR_MEM_SIZE;
  

•   const u64 ddr_end = PAYLOAD_DEST + ddr_size;
  

•   const u64 ddr_size = priv->info.size;
  

•   const u64 ddr_end = priv->info.base + ddr_size;
   int ret, i;
   u32 physet;
  
  

@@ -302,7 +302,7 @@ static int fu540_ddr_setup(struct udevice *dev) | (1 << MULTIPLE_OUT_OF_RANGE_OFFSET));

   /* set up range protection */

•   fu540_ddr_setup_range_protection(denali_ctl, DDR_MEM_SIZE);
  

•   fu540_ddr_setup_range_protection(denali_ctl, priv->info.size);
  
   /* Mask off port command error interrupt DENALI_CTL_136 */
   setbits_le32(DENALI_CTL_136 + denali_ctl, @@ -314,14 +314,14 @@ static
  

int fu540_ddr_setup(struct udevice *dev)

   /* check size */
   priv->info.size = get_ram_size((long *)priv->info.base,

•                                  DDR_MEM_SIZE);
  

•                                  ddr_size);
  
   debug("%s : %lx\n", __func__, priv->info.size);
  
   /* check memory access for all memory */
  

•   if (priv->info.size != DDR_MEM_SIZE) {
  

•   if (priv->info.size != ddr_size) {
           printf("DDR invalid size : 0x%lx, expected 0x%lx\n",
  

•                  priv->info.size, DDR_MEM_SIZE);
  

•                  priv->info.size, (uintptr_t)ddr_size);
           return -EINVAL;
   }
  
  

@@ -333,6 +333,11 @@ static int fu540_ddr_probe(struct udevice *dev) { struct fu540_ddr_info *priv = dev_get_priv(dev);

•   /* Read memory base and size from DT */
  

•   fdtdec_setup_mem_size_base();
  

•   priv->info.base = gd->ram_base;
  

•   priv->info.size = gd->ram_size;
  

#if defined(CONFIG_SPL_BUILD) struct regmap *map; int ret; @@ -368,14 +373,9 @@ static int fu540_ddr_probe(struct udevice *dev) priv->phy = regmap_get_range(map, 1); priv->physical_filter_ctrl = regmap_get_range(map, 2);

•   priv->info.base = CONFIG_SYS_SDRAM_BASE;
  

•   priv->info.size = 0;
   return fu540_ddr_setup(dev);
  

-#else

•   priv->info.base = CONFIG_SYS_SDRAM_BASE;
  

•   priv->info.size = DDR_MEM_SIZE;
  

This "else" part also need to be updated rather than removing it because it used by fu540_ddr_get_info() function in case of U-Boot.

#endif

•  return 0;
  

}

-- 2.7.4