487d70d0b8
This patch adds a generic solution to support multiple machines based on a given SoC within a single kernel image. It is implemented already for several other architectures but MIPS has no generic support for that yet. [Ralf: This competes with DT but DT is a much more complex solution and this code has been used by OpenWRT for a long time so for now DT is a bad reason to stop the merge but longer term this should be migrated to DT.] Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: linux-mips@linux-mips.org Cc: kaloz@openwrt.org Cc: Luis R. Rodriguez <lrodriguez@atheros.com> Cc: Cliff Holden <Cliff.Holden@Atheros.com> Patchwork: https://patchwork.linux-mips.org/patch/1814/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
/*
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* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <asm/mips_machine.h>
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static struct mips_machine *mips_machine __initdata;
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static char *mips_machine_name = "Unknown";
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#define for_each_machine(mach) \
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for ((mach) = (struct mips_machine *)&__mips_machines_start; \
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(mach) && \
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(unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
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(mach)++)
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__init void mips_set_machine_name(const char *name)
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{
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char *p;
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if (name == NULL)
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return;
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p = kstrdup(name, GFP_KERNEL);
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if (!p)
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pr_err("MIPS: no memory for machine_name\n");
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mips_machine_name = p;
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}
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char *mips_get_machine_name(void)
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{
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return mips_machine_name;
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}
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__init int mips_machtype_setup(char *id)
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{
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struct mips_machine *mach;
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for_each_machine(mach) {
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if (mach->mach_id == NULL)
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continue;
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if (strcmp(mach->mach_id, id) == 0) {
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mips_machtype = mach->mach_type;
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return 0;
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}
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}
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pr_err("MIPS: no machine found for id '%s', supported machines:\n", id);
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pr_err("%-24s %s\n", "id", "name");
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for_each_machine(mach)
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pr_err("%-24s %s\n", mach->mach_id, mach->mach_name);
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return 1;
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}
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__setup("machtype=", mips_machtype_setup);
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__init void mips_machine_setup(void)
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{
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struct mips_machine *mach;
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for_each_machine(mach) {
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if (mips_machtype == mach->mach_type) {
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mips_machine = mach;
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break;
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}
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}
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if (!mips_machine)
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return;
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mips_set_machine_name(mips_machine->mach_name);
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pr_info("MIPS: machine is %s\n", mips_machine_name);
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if (mips_machine->mach_setup)
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mips_machine->mach_setup();
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}
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