sunxi: Add support for Allwinner A64 SoCs

[karo-tx-uboot.git] / arch / arm / include / asm / arch-sunxi / spl.h

diff --git a/arch/arm/include/asm/arch-sunxi/spl.h b/arch/arm/include/asm/arch-sunxi/spl.h
index ff871bcaeee689188b3305a3e0c7fffe27c16c65..ca9a4f99ad2bb036ba7679c2db2d9f6e546248c4 100644 (file)
--- a/arch/arm/include/asm/arch-sunxi/spl.h
+++ b/arch/arm/include/asm/arch-sunxi/spl.h
@@ -1,20 +1,53 @@
 /*
- * This is a copy of omap3/spl.h:
- *
- * (C) Copyright 2012
- * Texas Instruments, <www.ti.com>
+ * (C) Copyright 2007-2011
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
  *
  * SPDX-License-Identifier:    GPL-2.0+
  */
 #ifndef        _ASM_ARCH_SPL_H_
-#define        _ASM_SPL_H_
+#define        _ASM_ARCH_SPL_H_
+
+#define BOOT0_MAGIC            "eGON.BT0"
+#define SPL_SIGNATURE          "SPL" /* marks "sunxi" SPL header */
+#define SPL_HEADER_VERSION     1
+
+#if defined(CONFIG_MACH_SUN9I) || defined(CONFIG_MACH_SUN50I)
+#define SPL_ADDR               0x10000
+#else
+#define SPL_ADDR               0x0
+#endif
+
+/* boot head definition from sun4i boot code */
+struct boot_file_head {
+       uint32_t b_instruction; /* one intruction jumping to real code */
+       uint8_t magic[8];       /* ="eGON.BT0" or "eGON.BT1", not C-style str */
+       uint32_t check_sum;     /* generated by PC */
+       uint32_t length;        /* generated by PC */
+       /*
+        * We use a simplified header, only filling in what is needed
+        * by the boot ROM. To be compatible with Allwinner tools we
+        * would need to implement the proper fields here instead of
+        * padding.
+        *
+        * Actually we want the ability to recognize our "sunxi" variant
+        * of the SPL. To do so, let's place a special signature into the
+        * "pub_head_size" field. We can reasonably expect Allwinner's
+        * boot0 to always have the upper 16 bits of this set to 0 (after
+        * all the value shouldn't be larger than the limit imposed by
+        * SRAM size).
+        * If the signature is present (at 0x14), then we know it's safe
+        * to use the remaining 8 bytes (at 0x18) for our own purposes.
+        * (E.g. sunxi-tools "fel" utility can pass information there.)
+        */
+       union {
+               uint32_t pub_head_size;
+               uint8_t spl_signature[4];
+       };
+       uint32_t fel_script_address;
+       uint32_t reserved;              /* padding, align to 32 bytes */
+};
+
+#define is_boot0_magic(addr)   (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0)
 
-#define BOOT_DEVICE_NONE       0
-#define BOOT_DEVICE_XIP                1
-#define BOOT_DEVICE_NAND       2
-#define BOOT_DEVICE_ONE_NAND   3
-#define BOOT_DEVICE_MMC2       5 /*emmc*/
-#define BOOT_DEVICE_MMC1       6
-#define BOOT_DEVICE_XIPWAIT    7
-#define BOOT_DEVICE_MMC2_2      0xff
 #endif