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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
160 lines
3.8 KiB
C
160 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright © 2013 Tony Breeds IBM Corporation
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* Copyright © 2013 Alistair Popple IBM Corporation
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*
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* Based on earlier code:
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* Copyright (C) Paul Mackerras 1997.
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*
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* Matt Porter <mporter@kernel.crashing.org>
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* Copyright 2002-2005 MontaVista Software Inc.
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*
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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* Copyright (c) 2003, 2004 Zultys Technologies
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*
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* Copyright 2007 David Gibson, IBM Corporation.
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* Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
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* Copyright © 2011 David Kleikamp IBM Corporation
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include "types.h"
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#include "elf.h"
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#include "string.h"
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#include "stdlib.h"
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#include "stdio.h"
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#include "page.h"
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#include "ops.h"
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#include "reg.h"
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#include "io.h"
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#include "dcr.h"
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#include "4xx.h"
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#include "44x.h"
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#include "libfdt.h"
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BSS_STACK(4096);
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#define SPRN_PIR 0x11E /* Processor Identification Register */
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#define USERDATA_LEN 256 /* Length of userdata passed in by PIBS */
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#define MAX_RANKS 0x4
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#define DDR3_MR0CF 0x80010011U
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#define CCTL0_MCO2 0x8000080FU
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#define CCTL0_MCO3 0x80000810U
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#define CCTL0_MCO4 0x80000811U
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#define CCTL0_MCO5 0x80000812U
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#define CCTL0_MCO6 0x80000813U
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static unsigned long long ibm_akebono_memsize;
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static long long unsigned mac_addr;
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static unsigned long long ibm_akebono_detect_memsize(void)
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{
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u32 reg;
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unsigned i;
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unsigned long long memsize = 0;
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for (i = 0; i < MAX_RANKS; i++) {
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reg = mfdcrx(DDR3_MR0CF + i);
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if (!(reg & 1))
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continue;
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reg &= 0x0000f000;
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reg >>= 12;
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memsize += (0x800000ULL << reg);
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}
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return memsize;
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}
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static void ibm_akebono_fixups(void)
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{
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void *emac;
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u32 reg;
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dt_fixup_memory(0x0ULL, ibm_akebono_memsize);
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/* Fixup the SD timeout frequency */
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mtdcrx(CCTL0_MCO4, 0x1);
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/* Disable SD high-speed mode (which seems to be broken) */
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reg = mfdcrx(CCTL0_MCO2) & ~0x2;
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mtdcrx(CCTL0_MCO2, reg);
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/* Set the MAC address */
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emac = finddevice("/plb/opb/ethernet");
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if (emac > 0) {
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if (mac_addr)
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setprop(emac, "local-mac-address",
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((u8 *) &mac_addr) + 2 , 6);
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}
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}
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void platform_init(char *userdata)
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{
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unsigned long end_of_ram, avail_ram;
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u32 pir_reg;
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int node, size;
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const u32 *timebase;
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int len, i, userdata_len;
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char *end;
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userdata[USERDATA_LEN - 1] = '\0';
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userdata_len = strlen(userdata);
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for (i = 0; i < userdata_len - 15; i++) {
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if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) {
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if (i > 0 && userdata[i - 1] != ' ') {
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/* We've only found a substring ending
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* with local-mac-addr so this isn't
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* our mac address. */
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continue;
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}
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mac_addr = strtoull(&userdata[i + 15], &end, 16);
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/* Remove the "local-mac-addr=<...>" from the kernel
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* command line, including the tailing space if
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* present. */
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if (*end == ' ')
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end++;
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len = ((int) end) - ((int) &userdata[i]);
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memmove(&userdata[i], end,
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userdata_len - (len + i) + 1);
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break;
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}
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}
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loader_info.cmdline = userdata;
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loader_info.cmdline_len = 256;
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ibm_akebono_memsize = ibm_akebono_detect_memsize();
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if (ibm_akebono_memsize >> 32)
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end_of_ram = ~0UL;
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else
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end_of_ram = ibm_akebono_memsize;
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avail_ram = end_of_ram - (unsigned long)_end;
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simple_alloc_init(_end, avail_ram, 128, 64);
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platform_ops.fixups = ibm_akebono_fixups;
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platform_ops.exit = ibm44x_dbcr_reset;
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pir_reg = mfspr(SPRN_PIR);
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/* Make sure FDT blob is sane */
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if (fdt_check_header(_dtb_start) != 0)
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fatal("Invalid device tree blob\n");
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node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
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"cpu", sizeof("cpu"));
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if (!node)
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fatal("Cannot find cpu node\n");
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timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
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if (timebase && (size == 4))
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timebase_period_ns = 1000000000 / *timebase;
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fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
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fdt_init(_dtb_start);
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serial_console_init();
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}
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