powerpc/boot/fsl-soc.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Freescale SOC support functions
0004  *
0005  * Author: Scott Wood <scottwood@freescale.com>
0006  *
0007  * Copyright (c) 2007 Freescale Semiconductor, Inc.
0008  */
0009
0010 #include "ops.h"
0011 #include "types.h"
0012 #include "fsl-soc.h"
0013 #include "stdio.h"
0014
0015 static u32 prop_buf[MAX_PROP_LEN / 4];
0016
0017 u32 *fsl_get_immr(void)
0018 {
0019     void *soc;
0020     unsigned long ret = 0;
0021
0022     soc = find_node_by_devtype(NULL, "soc");
0023     if (soc) {
0024         int size;
0025         u32 naddr;
0026
0027         size = getprop(soc, "#address-cells", prop_buf, MAX_PROP_LEN);
0028         if (size == 4)
0029             naddr = prop_buf[0];
0030         else
0031             naddr = 2;
0032
0033         if (naddr != 1 && naddr != 2)
0034             goto err;
0035
0036         size = getprop(soc, "ranges", prop_buf, MAX_PROP_LEN);
0037
0038         if (size < 12)
0039             goto err;
0040         if (prop_buf[0] != 0)
0041             goto err;
0042         if (naddr == 2 && prop_buf[1] != 0)
0043             goto err;
0044
0045         if (!dt_xlate_addr(soc, prop_buf + naddr, 8, &ret))
0046             ret = 0;
0047     }
0048
0049 err:
0050     if (!ret)
0051         printf("fsl_get_immr: Failed to find immr base\r\n");
0052
0053     return (u32 *)ret;
0054 }