mirror of https://gitee.com/openkylin/linux.git
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Old U-boot compatibility for Walnut
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*
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* Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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*
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* Copyright 2007 IBM Corporation
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* Based on cuboot-83xx.c, which is:
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* Copyright (c) 2007 Freescale Semiconductor, Inc.
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*/
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#include "ops.h"
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#include "stdio.h"
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#include "dcr.h"
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#include "4xx.h"
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#include "io.h"
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BSS_STACK(4096);
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static void walnut_flashsel_fixup(void)
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{
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void *devp, *sram;
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u32 reg_flash[3] = {0x0, 0x0, 0x80000};
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u32 reg_sram[3] = {0x0, 0x0, 0x80000};
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u8 *fpga;
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u8 fpga_brds1 = 0x0;
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devp = finddevice("/plb/ebc/fpga");
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if (!devp)
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fatal("Couldn't locate FPGA node\n\r");
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if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
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fatal("no virtual-reg property\n\r");
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fpga_brds1 = in_8(fpga);
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devp = finddevice("/plb/ebc/flash");
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if (!devp)
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fatal("Couldn't locate flash node\n\r");
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if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
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fatal("flash reg property has unexpected size\n\r");
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sram = finddevice("/plb/ebc/sram");
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if (!sram)
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fatal("Couldn't locate sram node\n\r");
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if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
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fatal("sram reg property has unexpected size\n\r");
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if (fpga_brds1 & 0x1) {
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reg_flash[1] ^= 0x80000;
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reg_sram[1] ^= 0x80000;
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}
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setprop(devp, "reg", reg_flash, sizeof(reg_flash));
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setprop(sram, "reg", reg_sram, sizeof(reg_sram));
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}
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#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
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static void walnut_fixups(void)
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{
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ibm4xx_sdram_fixup_memsize();
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ibm405gp_fixup_clocks(33330000, 0xa8c000);
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ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
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ibm4xx_fixup_ebc_ranges("/plb/ebc");
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walnut_flashsel_fixup();
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dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF);
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}
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void platform_init(void)
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{
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unsigned long end_of_ram = 0x2000000;
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unsigned long avail_ram = end_of_ram - (unsigned long) _end;
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simple_alloc_init(_end, avail_ram, 32, 32);
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platform_ops.fixups = walnut_fixups;
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platform_ops.exit = ibm40x_dbcr_reset;
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fdt_init(_dtb_start);
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serial_console_init();
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}
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