ARM: omap5: add fdt secure dram reservation fixup

Adds a secure dram reservation fixup for secure
devices, when a region in the emif has been set aside
for secure world use. The size is defined by the
CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE config option.

Signed-off-by: Daniel Allred <d-allred@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/arch/arm/cpu/armv7/omap5/fdt.c b/arch/arm/cpu/armv7/omap5/fdt.c
index 0493cd1..da8d59b 100644 (file)
--- a/arch/arm/cpu/armv7/omap5/fdt.c
+++ b/arch/arm/cpu/armv7/omap5/fdt.c
@@ -153,13 +153,73 @@ static int ft_hs_fixup_sram(void *fdt, bd_t *bd)
 static int ft_hs_fixup_sram(void *fdt, bd_t *bd) { return 0; }
 #endif
 
+#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE != 0)
+static int ft_hs_fixup_dram(void *fdt, bd_t *bd)
+{
+       const char *path, *subpath;
+       int offs;
+       u32 sec_mem_start = CONFIG_TI_SECURE_EMIF_REGION_START;
+       u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
+       fdt64_t temp[2];
+
+       /* If start address is zero, place at end of DRAM */
+       if (0 == sec_mem_start)
+               sec_mem_start =
+                       (CONFIG_SYS_SDRAM_BASE +
+                       (omap_sdram_size() - sec_mem_size));
+
+       /* Delete any original secure_reserved node */
+       path = "/reserved-memory/secure_reserved";
+       offs = fdt_path_offset(fdt, path);
+       if (offs >= 0)
+               fdt_del_node(fdt, offs);
+
+       /* Add new secure_reserved node */
+       path = "/reserved-memory";
+       offs = fdt_path_offset(fdt, path);
+       if (offs < 0) {
+               debug("Node %s not found\n", path);
+               path = "/";
+               subpath = "reserved-memory";
+               fdt_path_offset(fdt, path);
+               offs = fdt_add_subnode(fdt, offs, subpath);
+               if (offs < 0) {
+                       printf("Could not create %s%s node.\n", path, subpath);
+                       return 1;
+               }
+               path = "/reserved-memory";
+               offs = fdt_path_offset(fdt, path);
+       }
+
+       subpath = "secure_reserved";
+       offs = fdt_add_subnode(fdt, offs, subpath);
+       if (offs < 0) {
+               printf("Could not create %s%s node.\n", path, subpath);
+               return 1;
+       }
+
+       temp[0] = cpu_to_fdt64(((u64)sec_mem_start));
+       temp[1] = cpu_to_fdt64(((u64)sec_mem_size));
+       fdt_setprop_string(fdt, offs, "compatible",
+                          "ti,dra7-secure-memory");
+       fdt_setprop_string(fdt, offs, "status", "okay");
+       fdt_setprop(fdt, offs, "no-map", NULL, 0);
+       fdt_setprop(fdt, offs, "reg", temp, sizeof(temp));
+
+       return 0;
+}
+#else
+static int ft_hs_fixup_dram(void *fdt, bd_t *bd) { return 0; }
+#endif
+
 static void ft_hs_fixups(void *fdt, bd_t *bd)
 {
        /* Check we are running on an HS/EMU device type */
        if (GP_DEVICE != get_device_type()) {
                if ((ft_hs_fixup_crossbar(fdt, bd) == 0) &&
                    (ft_hs_disable_rng(fdt, bd) == 0) &&
-                   (ft_hs_fixup_sram(fdt, bd) == 0))
+                   (ft_hs_fixup_sram(fdt, bd) == 0) &&
+                   (ft_hs_fixup_dram(fdt, bd) == 0))
                        return;
        } else {
                printf("ERROR: Incorrect device type (GP) detected!");
@@ -171,7 +231,7 @@ static void ft_hs_fixups(void *fdt, bd_t *bd)
 static void ft_hs_fixups(void *fdt, bd_t *bd)
 {
 }
-#endif
+#endif /* #ifdef CONFIG_TI_SECURE_DEVICE */
 
 /*
  * Place for general cpu/SoC FDT fixups. Board specific