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MIPS: Loongson: Add a machtype kernel command line argument

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The difference between some loongson-based machines is very small, so, if
there is no necessary to add new kernel config options to cope with this
difference, it will be better to share the same kernel image file between
them, benefit from this, the linux distribution developers only have a need
to compile the kernel one time.

This machtype kernel command line argument will be used later to share the
same kernel image file between two different machines(menglong & yeeloong)
made by lemote.

Thanks very much to Zhang Le for cleaning up the machtype implementation.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Wu Zhangjin 2009-07-02 23:27:12 +08:00 committed by Ralf Baechle
parent 85749d24bc
commit 3209e70e5e
6 changed files with 53 additions and 4 deletions
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4
Documentation/kernel-parameters.txt
View File

@ -1286,6 +1286,10 @@ and is between 256 and 4096 characters. It is defined in the file
(machvec) in a generic kernel.
Example: machvec=hpzx1_swiotlb
machtype= [Loongson] Share the same kernel image file between different
yeeloong laptop.
Example: machtype=lemote-yeeloong-2f-7inch
max_addr=nn[KMG] [KNL,BOOT,ia64] All physical memory greater
than or equal to this physical address is ignored.

12
arch/mips/include/asm/bootinfo.h
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@ -7,6 +7,7 @@
* Copyright (C) 1995, 1996 Andreas Busse
* Copyright (C) 1995, 1996 Stoned Elipot
* Copyright (C) 1995, 1996 Paul M. Antoine.
* Copyright (C) 2009 Zhang Le
*/
#ifndef _ASM_BOOTINFO_H
#define _ASM_BOOTINFO_H
@ -57,6 +58,17 @@
#define MACH_MIKROTIK_RB532 0 /* Mikrotik RouterBoard 532 */
#define MACH_MIKROTIK_RB532A 1 /* Mikrotik RouterBoard 532A */
/*
* Valid machtype for Loongson family
*/
#define MACH_LOONGSON_UNKNOWN 0
#define MACH_LEMOTE_FL2E 1
#define MACH_LEMOTE_FL2F 2
#define MACH_LEMOTE_ML2F7 3
#define MACH_LEMOTE_YL2F89 4
#define MACH_DEXXON_GDIUM2F10 5
#define MACH_LOONGSON_END 6
#define CL_SIZE COMMAND_LINE_SIZE
extern char *system_type;

2
arch/mips/include/asm/mach-loongson/machine.h
View File

@ -15,7 +15,7 @@
#define LOONGSON_UART_BASE (BONITO_PCIIO_BASE + 0x3f8)
#define LOONGSON_MACHNAME "lemote-fuloong-2e-box"
#define LOONGSON_MACHTYPE MACH_LEMOTE_FL2E
#endif

2
arch/mips/loongson/common/Makefile
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@ -3,7 +3,7 @@
#
obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
pci.o bonito-irq.o mem.o
pci.o bonito-irq.o mem.o machtype.o
#
# Early printk support

35
arch/mips/loongson/common/machtype.c
View File

@ -2,16 +2,49 @@
* Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
* Author: Wu Zhangjin, wuzj@lemote.com
*
* Copyright (c) 2009 Zhang Le <r0bertz@gentoo.org>
*
* 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 <linux/errno.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <machine.h>
static const char *system_types[] = {
[MACH_LOONGSON_UNKNOWN] "unknown loongson machine",
[MACH_LEMOTE_FL2E] "lemote-fuloong-2e-box",
[MACH_LEMOTE_FL2F] "lemote-fuloong-2f-box",
[MACH_LEMOTE_ML2F7] "lemote-mengloong-2f-7inches",
[MACH_LEMOTE_YL2F89] "lemote-yeeloong-2f-8.9inches",
[MACH_DEXXON_GDIUM2F10] "dexxon-gidum-2f-10inches",
[MACH_LOONGSON_END] NULL,
};
const char *get_system_type(void)
{
return LOONGSON_MACHNAME;
if (mips_machtype == MACH_UNKNOWN)
mips_machtype = LOONGSON_MACHTYPE;
return system_types[mips_machtype];
}
static __init int machtype_setup(char *str)
{
int machtype = MACH_LEMOTE_FL2E;
if (!str)
return -EINVAL;
for (; system_types[machtype]; machtype++)
if (strstr(system_types[machtype], str)) {
mips_machtype = machtype;
break;
}
return 0;
}
__setup("machtype=", machtype_setup);

2
arch/mips/loongson/fuloong-2e/Makefile
View File

@ -2,6 +2,6 @@
# Makefile for Lemote Fuloong2e mini-PC board.
#
obj-y += irq.o reset.o machtype.o
obj-y += irq.o reset.o
EXTRA_CFLAGS += -Werror