arm64: sunxi: adjust default load addresses

As arm64 has slightly different expectations about load addresses, lets
use a different set of default addresses for things like the kernel.
As arm64 kernels don't come with a decompressor right now, reserve some
more space for really big uncompressed kernels.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

include/configs/sunxi-common.h

@@ -390,6 +390,23 @@ extern int soft_i2c_gpio_scl;
 #define CONFIG_PRE_CONSOLE_BUFFER
 #define CONFIG_PRE_CON_BUF_SZ		4096 /* Aprox 2 80*25 screens */
 
+#ifdef CONFIG_ARM64
+/*
+ * Boards seem to come with at least 512MB of DRAM.
+ * The kernel should go at 512K, which is the default text offset (that will
+ * be adjusted at runtime if needed).
+ * There is no compression for arm64 kernels (yet), so leave some space
+ * for really big kernels, say 256MB for now.
+ * Scripts, PXE and DTBs should go afterwards, leaving the rest for the initrd.
+ * Align the initrd to a 2MB page.
+ */
+#define KERNEL_ADDR_R	__stringify(SDRAM_OFFSET(0080000))
+#define FDT_ADDR_R	__stringify(SDRAM_OFFSET(FA00000))
+#define SCRIPT_ADDR_R	__stringify(SDRAM_OFFSET(FC00000))
+#define PXEFILE_ADDR_R	__stringify(SDRAM_OFFSET(FD00000))
+#define RAMDISK_ADDR_R	__stringify(SDRAM_OFFSET(FE00000))
+
+#else
 /*
  * 160M RAM (256M minimum minus 64MB heap + 32MB for u-boot, stack, fb, etc.
  * 32M uncompressed kernel, 16M compressed kernel, 1M fdt,
@@ -401,6 +418,7 @@ extern int soft_i2c_gpio_scl;
 #define SCRIPT_ADDR_R  __stringify(SDRAM_OFFSET(3100000))
 #define PXEFILE_ADDR_R __stringify(SDRAM_OFFSET(3200000))
 #define RAMDISK_ADDR_R __stringify(SDRAM_OFFSET(3300000))
+#endif
 
 #define MEM_LAYOUT_ENV_SETTINGS \
 	"bootm_size=0xa000000\0" \