Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / board / freescale / common / sdhc_boot.c

diff --git a/qemu/roms/u-boot/board/freescale/common/sdhc_boot.c b/qemu/roms/u-boot/board/freescale/common/sdhc_boot.c
new file mode 100644 (file)
index 0000000..022f38b
--- /dev/null
+++ b/qemu/roms/u-boot/board/freescale/common/sdhc_boot.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <malloc.h>
+
+/*
+ * The environment variables are written to just after the u-boot image
+ * on SDCard, so we must read the MBR to get the start address and code
+ * length of the u-boot image, then calculate the address of the env.
+ */
+#define ESDHC_BOOT_IMAGE_SIZE  0x48
+#define ESDHC_BOOT_IMAGE_ADDR  0x50
+
+#define ESDHC_DEFAULT_ENVADDR  0x400
+
+int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
+{
+       u8 *tmp_buf;
+       u32 blklen, code_offset, code_len, n;
+
+       blklen = mmc->read_bl_len;
+       tmp_buf = malloc(blklen);
+       if (!tmp_buf)
+               return 1;
+
+       /* read out the first block, get the config data information */
+       n = mmc->block_dev.block_read(mmc->block_dev.dev, 0, 1, tmp_buf);
+       if (!n) {
+               free(tmp_buf);
+               return 1;
+       }
+
+       /* Get the Source Address, from offset 0x50 */
+       code_offset = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_ADDR);
+
+       /* Get the code size from offset 0x48 */
+       code_len = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_SIZE);
+
+#ifdef CONFIG_ESDHC_HC_BLK_ADDR
+       /*
+        * On soc BSC9131, BSC9132:
+        * In High Capacity SD Cards (> 2 GBytes), the 32-bit source address and
+        * code length of these soc specify the memory address in block address
+        * format. Block length is fixed to 512 bytes as per the SD High
+        * Capacity specification.
+        */
+       u64 tmp;
+
+       if (mmc->high_capacity) {
+               tmp = (u64)code_offset * blklen;
+               tmp += code_len * blklen;
+       } else
+               tmp = code_offset + code_len;
+
+       if ((tmp + CONFIG_ENV_SIZE > mmc->capacity) ||
+                       (tmp > 0xFFFFFFFFU))
+               *env_addr = ESDHC_DEFAULT_ENVADDR;
+       else
+               *env_addr = tmp;
+
+       free(tmp_buf);
+
+       return 0;
+#endif
+
+       *env_addr = code_offset + code_len;
+
+       free(tmp_buf);
+
+       return 0;
+}