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git.ipfire.org Git - thirdparty/kernel/stable.git/blob - arch/powerpc/boot/treeboot-walnut.c
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Old U-boot compatibility for Walnut
5 * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
7 * Copyright 2007 IBM Corporation
8 * Based on cuboot-83xx.c, which is:
9 * Copyright (c) 2007 Freescale Semiconductor, Inc.
20 static void walnut_flashsel_fixup(void)
23 u32 reg_flash
[3] = {0x0, 0x0, 0x80000};
24 u32 reg_sram
[3] = {0x0, 0x0, 0x80000};
28 devp
= finddevice("/plb/ebc/fpga");
30 fatal("Couldn't locate FPGA node\n\r");
32 if (getprop(devp
, "virtual-reg", &fpga
, sizeof(fpga
)) != sizeof(fpga
))
33 fatal("no virtual-reg property\n\r");
35 fpga_brds1
= in_8(fpga
);
37 devp
= finddevice("/plb/ebc/flash");
39 fatal("Couldn't locate flash node\n\r");
41 if (getprop(devp
, "reg", reg_flash
, sizeof(reg_flash
)) != sizeof(reg_flash
))
42 fatal("flash reg property has unexpected size\n\r");
44 sram
= finddevice("/plb/ebc/sram");
46 fatal("Couldn't locate sram node\n\r");
48 if (getprop(sram
, "reg", reg_sram
, sizeof(reg_sram
)) != sizeof(reg_sram
))
49 fatal("sram reg property has unexpected size\n\r");
51 if (fpga_brds1
& 0x1) {
52 reg_flash
[1] ^= 0x80000;
53 reg_sram
[1] ^= 0x80000;
56 setprop(devp
, "reg", reg_flash
, sizeof(reg_flash
));
57 setprop(sram
, "reg", reg_sram
, sizeof(reg_sram
));
60 #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
61 static void walnut_fixups(void)
63 ibm4xx_sdram_fixup_memsize();
64 ibm405gp_fixup_clocks(33330000, 0xa8c000);
65 ibm4xx_quiesce_eth((u32
*)0xef600800, NULL
);
66 ibm4xx_fixup_ebc_ranges("/plb/ebc");
67 walnut_flashsel_fixup();
68 dt_fixup_mac_address_by_alias("ethernet0", (u8
*) WALNUT_OPENBIOS_MAC_OFF
);
71 void platform_init(void)
73 unsigned long end_of_ram
= 0x2000000;
74 unsigned long avail_ram
= end_of_ram
- (unsigned long) _end
;
76 simple_alloc_init(_end
, avail_ram
, 32, 32);
77 platform_ops
.fixups
= walnut_fixups
;
78 platform_ops
.exit
= ibm40x_dbcr_reset
;
80 serial_console_init();