450dd430bf
* mem size now runtime configured (prev CONFIG_ARC_PLAT_SDRAM_SIZE) * core cpu clk runtime configured (prev CONFIG_ARC_PLAT_CLK) Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Grant Likely <grant.likely@secretlab.ca>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
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*
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* Based on reduced version of METAG
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/reboot.h>
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#include <linux/memblock.h>
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#include <linux/of.h>
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#include <linux/of_fdt.h>
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#include <asm/prom.h>
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#include <asm/clk.h>
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/* called from unflatten_device_tree() to bootstrap devicetree itself */
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void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
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{
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return __va(memblock_alloc(size, align));
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}
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/**
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* setup_machine_fdt - Machine setup when an dtb was passed to the kernel
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* @dt: virtual address pointer to dt blob
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*
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* If a dtb was passed to the kernel, then use it to choose the correct
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* machine_desc and to setup the system.
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*/
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int __init setup_machine_fdt(void *dt)
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{
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struct boot_param_header *devtree = dt;
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unsigned long dt_root;
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char *model, *compat;
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void *clk;
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char manufacturer[16];
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unsigned long len;
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/* check device tree validity */
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if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
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return 1;
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/* Search the mdescs for the 'best' compatible value match */
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initial_boot_params = devtree;
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dt_root = of_get_flat_dt_root();
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/* compat = "<manufacturer>,<model>" */
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compat = of_get_flat_dt_prop(dt_root, "compatible", NULL);
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if (!compat)
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compat = "<unknown>";
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model = strchr(compat, ',');
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if (model)
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model++;
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strlcpy(manufacturer, compat, model ? model - compat : strlen(compat));
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pr_info("Board \"%s\" from %s (Manufacturer)\n", model, manufacturer);
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/* Retrieve various information from the /chosen node */
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of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
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/* Initialize {size,address}-cells info */
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of_scan_flat_dt(early_init_dt_scan_root, NULL);
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/* Setup memory, calling early_init_dt_add_memory_arch */
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of_scan_flat_dt(early_init_dt_scan_memory, NULL);
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clk = of_get_flat_dt_prop(dt_root, "clock-frequency", &len);
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if (clk)
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arc_set_core_freq(of_read_ulong(clk, len/4));
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return 0;
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}
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