[U-Boot] [PATCH v4 12/27] armv8: layerscape: add SMC calls for DDR size and bank info

[Rajesh Bhagat]

Adds SMC calls for getting DDR size and bank info for TFABOOT.

Signed-off-by: Rajesh Bhagat <rajesh.bha...@nxp.com>
Signed-off-by: Pankit Garg <pankit.g...@nxp.com>
---
Change in v4: None
Change in v3: None
Change in v2: None

 arch/arm/cpu/armv8/fsl-layerscape/cpu.c       | 84 +++++++++++++++++++
 .../arm/include/asm/arch-fsl-layerscape/soc.h |  4 +
 2 files changed, 88 insertions(+)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c 
b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index 6c1b1ffec8..ca5329f25c 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1230,12 +1230,96 @@ phys_size_t get_effective_memsize(void)
        return ea_size;
 }
 
+#ifdef CONFIG_TFABOOT
+phys_size_t tfa_get_dram_size(void)
+{
+       struct pt_regs regs;
+       phys_size_t dram_size = 0;
+
+       regs.regs[0] = SMC_DRAM_BANK_INFO;
+       regs.regs[1] = -1;
+
+       smc_call(&regs);
+       if (regs.regs[0])
+               return 0;
+
+       dram_size = regs.regs[1];
+       return dram_size;
+}
+
+static int tfa_dram_init_banksize(void)
+{
+       int i = 0, ret = 0;
+       struct pt_regs regs;
+       phys_size_t dram_size = tfa_get_dram_size();
+
+       debug("dram_size %llx\n", dram_size);
+
+       if (!dram_size)
+               return -EINVAL;
+
+       do {
+               regs.regs[0] = SMC_DRAM_BANK_INFO;
+               regs.regs[1] = i;
+
+               smc_call(&regs);
+               if (regs.regs[0]) {
+                       ret = -EINVAL;
+                       break;
+               }
+
+               debug("bank[%d]: start %lx, size %lx\n", i, regs.regs[1],
+                     regs.regs[2]);
+               gd->bd->bi_dram[i].start = regs.regs[1];
+               gd->bd->bi_dram[i].size = regs.regs[2];
+
+               dram_size -= gd->bd->bi_dram[i].size;
+
+               i++;
+       } while (dram_size);
+
+       if (i > 0)
+               ret = 0;
+
+#if defined(CONFIG_FSL_MC_ENET) && !defined(CONFIG_SPL_BUILD)
+       /* Assign memory for MC */
+#ifdef CONFIG_SYS_DDR_BLOCK3_BASE
+       if (gd->bd->bi_dram[2].size >=
+           board_reserve_ram_top(gd->bd->bi_dram[2].size)) {
+               gd->arch.resv_ram = gd->bd->bi_dram[2].start +
+                           gd->bd->bi_dram[2].size -
+                           board_reserve_ram_top(gd->bd->bi_dram[2].size);
+       } else
+#endif
+       {
+               if (gd->bd->bi_dram[1].size >=
+                   board_reserve_ram_top(gd->bd->bi_dram[1].size)) {
+                       gd->arch.resv_ram = gd->bd->bi_dram[1].start +
+                               gd->bd->bi_dram[1].size -
+                               board_reserve_ram_top(gd->bd->bi_dram[1].size);
+               } else if (gd->bd->bi_dram[0].size >
+                          board_reserve_ram_top(gd->bd->bi_dram[0].size)) {
+                       gd->arch.resv_ram = gd->bd->bi_dram[0].start +
+                               gd->bd->bi_dram[0].size -
+                               board_reserve_ram_top(gd->bd->bi_dram[0].size);
+               }
+       }
+#endif /* CONFIG_FSL_MC_ENET */
+
+       return ret;
+}
+#endif
+
 int dram_init_banksize(void)
 {
 #ifdef CONFIG_SYS_DP_DDR_BASE_PHY
        phys_size_t dp_ddr_size;
 #endif
 
+#ifdef CONFIG_TFABOOT
+       if (!tfa_dram_init_banksize())
+               return 0;
+#endif
        /*
         * gd->ram_size has the total size of DDR memory, less reserved secure
         * memory. The DDR extends from low region to high region(s) presuming
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/soc.h 
b/arch/arm/include/asm/arch-fsl-layerscape/soc.h
index d327c7ba1f..ef228b6443 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/soc.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/soc.h
@@ -55,6 +55,10 @@ struct cpu_type {
        { .name = #n, .soc_ver = SVR_##v, .num_cores = (nc)}
 
 #ifdef CONFIG_TFABOOT
+#define SMC_DRAM_BANK_INFO (0xC200FF12)
+
+phys_size_t tfa_get_dram_size(void);
+
 enum boot_src {
        BOOT_SOURCE_RESERVED = 0,
        BOOT_SOURCE_IFC_NOR,
-- 
2.17.1

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