164 lines
4 KiB
C
164 lines
4 KiB
C
/*
|
|
* Copyright © 2013 Tony Breeds IBM Corporation
|
|
* Copyright © 2013 Alistair Popple IBM Corporation
|
|
*
|
|
* Based on earlier code:
|
|
* Copyright (C) Paul Mackerras 1997.
|
|
*
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
* Copyright 2002-2005 MontaVista Software Inc.
|
|
*
|
|
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
|
|
* Copyright (c) 2003, 2004 Zultys Technologies
|
|
*
|
|
* Copyright 2007 David Gibson, IBM Corporation.
|
|
* Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
|
|
* Copyright © 2011 David Kleikamp IBM Corporation
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stddef.h>
|
|
#include "types.h"
|
|
#include "elf.h"
|
|
#include "string.h"
|
|
#include "stdlib.h"
|
|
#include "stdio.h"
|
|
#include "page.h"
|
|
#include "ops.h"
|
|
#include "reg.h"
|
|
#include "io.h"
|
|
#include "dcr.h"
|
|
#include "4xx.h"
|
|
#include "44x.h"
|
|
#include "libfdt.h"
|
|
|
|
BSS_STACK(4096);
|
|
|
|
#define SPRN_PIR 0x11E /* Processor Identification Register */
|
|
#define USERDATA_LEN 256 /* Length of userdata passed in by PIBS */
|
|
#define MAX_RANKS 0x4
|
|
#define DDR3_MR0CF 0x80010011U
|
|
#define CCTL0_MCO2 0x8000080FU
|
|
#define CCTL0_MCO3 0x80000810U
|
|
#define CCTL0_MCO4 0x80000811U
|
|
#define CCTL0_MCO5 0x80000812U
|
|
#define CCTL0_MCO6 0x80000813U
|
|
|
|
static unsigned long long ibm_akebono_memsize;
|
|
static long long unsigned mac_addr;
|
|
|
|
static unsigned long long ibm_akebono_detect_memsize(void)
|
|
{
|
|
u32 reg;
|
|
unsigned i;
|
|
unsigned long long memsize = 0;
|
|
|
|
for (i = 0; i < MAX_RANKS; i++) {
|
|
reg = mfdcrx(DDR3_MR0CF + i);
|
|
|
|
if (!(reg & 1))
|
|
continue;
|
|
|
|
reg &= 0x0000f000;
|
|
reg >>= 12;
|
|
memsize += (0x800000ULL << reg);
|
|
}
|
|
|
|
return memsize;
|
|
}
|
|
|
|
static void ibm_akebono_fixups(void)
|
|
{
|
|
void *emac;
|
|
u32 reg;
|
|
|
|
dt_fixup_memory(0x0ULL, ibm_akebono_memsize);
|
|
|
|
/* Fixup the SD timeout frequency */
|
|
mtdcrx(CCTL0_MCO4, 0x1);
|
|
|
|
/* Disable SD high-speed mode (which seems to be broken) */
|
|
reg = mfdcrx(CCTL0_MCO2) & ~0x2;
|
|
mtdcrx(CCTL0_MCO2, reg);
|
|
|
|
/* Set the MAC address */
|
|
emac = finddevice("/plb/opb/ethernet");
|
|
if (emac > 0) {
|
|
if (mac_addr)
|
|
setprop(emac, "local-mac-address",
|
|
((u8 *) &mac_addr) + 2 , 6);
|
|
}
|
|
}
|
|
|
|
void platform_init(char *userdata)
|
|
{
|
|
unsigned long end_of_ram, avail_ram;
|
|
u32 pir_reg;
|
|
int node, size;
|
|
const u32 *timebase;
|
|
int len, i, userdata_len;
|
|
char *end;
|
|
|
|
userdata[USERDATA_LEN - 1] = '\0';
|
|
userdata_len = strlen(userdata);
|
|
for (i = 0; i < userdata_len - 15; i++) {
|
|
if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) {
|
|
if (i > 0 && userdata[i - 1] != ' ') {
|
|
/* We've only found a substring ending
|
|
* with local-mac-addr so this isn't
|
|
* our mac address. */
|
|
continue;
|
|
}
|
|
|
|
mac_addr = strtoull(&userdata[i + 15], &end, 16);
|
|
|
|
/* Remove the "local-mac-addr=<...>" from the kernel
|
|
* command line, including the tailing space if
|
|
* present. */
|
|
if (*end == ' ')
|
|
end++;
|
|
|
|
len = ((int) end) - ((int) &userdata[i]);
|
|
memmove(&userdata[i], end,
|
|
userdata_len - (len + i) + 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
loader_info.cmdline = userdata;
|
|
loader_info.cmdline_len = 256;
|
|
|
|
ibm_akebono_memsize = ibm_akebono_detect_memsize();
|
|
if (ibm_akebono_memsize >> 32)
|
|
end_of_ram = ~0UL;
|
|
else
|
|
end_of_ram = ibm_akebono_memsize;
|
|
avail_ram = end_of_ram - (unsigned long)_end;
|
|
|
|
simple_alloc_init(_end, avail_ram, 128, 64);
|
|
platform_ops.fixups = ibm_akebono_fixups;
|
|
platform_ops.exit = ibm44x_dbcr_reset;
|
|
pir_reg = mfspr(SPRN_PIR);
|
|
|
|
/* Make sure FDT blob is sane */
|
|
if (fdt_check_header(_dtb_start) != 0)
|
|
fatal("Invalid device tree blob\n");
|
|
|
|
node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
|
|
"cpu", sizeof("cpu"));
|
|
if (!node)
|
|
fatal("Cannot find cpu node\n");
|
|
timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
|
|
if (timebase && (size == 4))
|
|
timebase_period_ns = 1000000000 / *timebase;
|
|
|
|
fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
|
|
fdt_init(_dtb_start);
|
|
|
|
serial_console_init();
|
|
}
|