2 * Old U-boot compatibility for Walnut
4 * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
6 * Copyright 2007 IBM Corporation
7 * Based on cuboot-83xx.c, which is:
8 * Copyright (c) 2007 Freescale Semiconductor, Inc.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
23 static void walnut_flashsel_fixup(void)
26 u32 reg_flash[3] = {0x0, 0x0, 0x80000};
27 u32 reg_sram[3] = {0x0, 0x0, 0x80000};
31 devp = finddevice("/plb/ebc/fpga");
33 fatal("Couldn't locate FPGA node\n\r");
35 if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
36 fatal("no virtual-reg property\n\r");
38 fpga_brds1 = in_8(fpga);
40 devp = finddevice("/plb/ebc/flash");
42 fatal("Couldn't locate flash node\n\r");
44 if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
45 fatal("flash reg property has unexpected size\n\r");
47 sram = finddevice("/plb/ebc/sram");
49 fatal("Couldn't locate sram node\n\r");
51 if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
52 fatal("sram reg property has unexpected size\n\r");
54 if (fpga_brds1 & 0x1) {
55 reg_flash[1] ^= 0x80000;
56 reg_sram[1] ^= 0x80000;
59 setprop(devp, "reg", reg_flash, sizeof(reg_flash));
60 setprop(sram, "reg", reg_sram, sizeof(reg_sram));
63 #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
64 static void walnut_fixups(void)
66 ibm4xx_sdram_fixup_memsize();
67 ibm405gp_fixup_clocks(33330000, 0xa8c000);
68 ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
69 ibm4xx_fixup_ebc_ranges("/plb/ebc");
70 walnut_flashsel_fixup();
71 dt_fixup_mac_addresses((u8 *) WALNUT_OPENBIOS_MAC_OFF);
74 void platform_init(void)
76 unsigned long end_of_ram = 0x2000000;
77 unsigned long avail_ram = end_of_ram - (unsigned long) _end;
79 simple_alloc_init(_end, avail_ram, 32, 32);
80 platform_ops.fixups = walnut_fixups;
81 platform_ops.exit = ibm40x_dbcr_reset;
83 serial_console_init();