target/linux/generic/patches-2.6.32/020-mips_multi_machine_support.patch

   1 --- /dev/null
   2 +++ b/arch/mips/include/asm/mips_machine.h
   3 @@ -0,0 +1,54 @@
   4 +/*
   5 + *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   6 + *
   7 + *  This program is free software; you can redistribute it and/or modify it
   8 + *  under the terms of the GNU General Public License version 2 as published
   9 + *  by the Free Software Foundation.
  10 + *
  11 + */
  12 +
  13 +#ifndef __ASM_MIPS_MACHINE_H
  14 +#define __ASM_MIPS_MACHINE_H
  15 +
  16 +#include <linux/init.h>
  17 +#include <linux/list.h>
  18 +
  19 +#include <asm/bootinfo.h>
  20 +
  21 +struct mips_machine {
  22 +       unsigned long           mach_type;
  23 +       const char              *mach_id;
  24 +       const char              *mach_name;
  25 +       void                    (*mach_setup)(void);
  26 +};
  27 +
  28 +#define MIPS_MACHINE(_type, _id, _name, _setup)                \
  29 +static const char machine_name_##_type[] __initconst           \
  30 +                       __aligned(1) = _name;                   \
  31 +static const char machine_id_##_type[] __initconst             \
  32 +                       __aligned(1) = _id;                     \
  33 +static struct mips_machine machine_##_type                     \
  34 +               __used __section(.mips.machines.init) =         \
  35 +{                                                              \
  36 +       .mach_type      = _type,                                \
  37 +       .mach_id        = machine_id_##_type,                   \
  38 +       .mach_name      = machine_name_##_type,                 \
  39 +       .mach_setup     = _setup,                               \
  40 +};
  41 +
  42 +extern long __mips_machines_start;
  43 +extern long __mips_machines_end;
  44 +
  45 +#ifdef CONFIG_MIPS_MACHINE
  46 +int  mips_machtype_setup(char *id) __init;
  47 +void mips_machine_setup(void) __init;
  48 +void mips_set_machine_name(const char *name) __init;
  49 +char *mips_get_machine_name(void);
  50 +#else
  51 +static inline int mips_machtype_setup(char *id) { return 1; }
  52 +static inline void mips_machine_setup(void) { }
  53 +static inline void mips_set_machine_name(const char *name) { }
  54 +static inline char *mips_get_machine_name(void) { return NULL; }
  55 +#endif /* CONFIG_MIPS_MACHINE */
  56 +
  57 +#endif /* __ASM_MIPS_MACHINE_H */
  58 --- /dev/null
  59 +++ b/arch/mips/kernel/mips_machine.c
  60 @@ -0,0 +1,86 @@
  61 +/*
  62 + *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  63 + *
  64 + *  This program is free software; you can redistribute it and/or modify it
  65 + *  under the terms of the GNU General Public License version 2 as published
  66 + *  by the Free Software Foundation.
  67 + *
  68 + */
  69 +#include <linux/mm.h>
  70 +#include <linux/string.h>
  71 +#include <linux/slab.h>
  72 +
  73 +#include <asm/mips_machine.h>
  74 +
  75 +static struct mips_machine *mips_machine __initdata;
  76 +static char *mips_machine_name = "Unknown";
  77 +
  78 +#define for_each_machine(mach) \
  79 +       for ((mach) = (struct mips_machine *)&__mips_machines_start; \
  80 +            (mach) && \
  81 +            (unsigned long)(mach) < (unsigned long)&__mips_machines_end; \
  82 +            (mach)++)
  83 +
  84 +__init void mips_set_machine_name(const char *name)
  85 +{
  86 +       char *p;
  87 +
  88 +       if (name == NULL)
  89 +               return;
  90 +
  91 +       p = kstrdup(name, GFP_KERNEL);
  92 +       if (!p)
  93 +               pr_err("MIPS: no memory for machine_name\n");
  94 +
  95 +       mips_machine_name = p;
  96 +}
  97 +
  98 +char *mips_get_machine_name(void)
  99 +{
 100 +       return mips_machine_name;
 101 +}
 102 +
 103 +__init int mips_machtype_setup(char *id)
 104 +{
 105 +       struct mips_machine *mach;
 106 +
 107 +       for_each_machine(mach) {
 108 +               if (mach->mach_id == NULL)
 109 +                       continue;
 110 +
 111 +               if (strcmp(mach->mach_id, id) == 0) {
 112 +                       mips_machtype = mach->mach_type;
 113 +                       return 0;
 114 +               }
 115 +       }
 116 +
 117 +       pr_err("MIPS: no machine found for id '%s', supported machines:\n", id);
 118 +       pr_err("%-24s : %s\n", "id", "name");
 119 +       for_each_machine(mach)
 120 +               pr_err("%-24s : %s\n", mach->mach_id, mach->mach_name);
 121 +
 122 +       return 1;
 123 +}
 124 +
 125 +__setup("machtype=", mips_machtype_setup);
 126 +
 127 +__init void mips_machine_setup(void)
 128 +{
 129 +       struct mips_machine *mach;
 130 +
 131 +       for_each_machine(mach) {
 132 +               if (mips_machtype == mach->mach_type) {
 133 +                       mips_machine = mach;
 134 +                       break;
 135 +               }
 136 +       }
 137 +
 138 +       if (!mips_machine)
 139 +               return;
 140 +
 141 +       mips_set_machine_name(mips_machine->mach_name);
 142 +       pr_info("MIPS: machine is %s\n", mips_machine_name);
 143 +
 144 +       if (mips_machine->mach_setup)
 145 +               mips_machine->mach_setup();
 146 +}
 147 --- a/arch/mips/kernel/Makefile
 148 +++ b/arch/mips/kernel/Makefile
 149 @@ -87,6 +87,7 @@ obj-$(CONFIG_GPIO_TXX9)               += gpio_txx9.o
 150
 151  obj-$(CONFIG_KEXEC)            += machine_kexec.o relocate_kernel.o
 152  obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
 153 +obj-$(CONFIG_MIPS_MACHINE)     += mips_machine.o
 154
 155  CFLAGS_cpu-bugs64.o    = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
 156
 157 --- a/arch/mips/Kconfig
 158 +++ b/arch/mips/Kconfig
 159 @@ -854,6 +854,9 @@ config MIPS_DISABLE_OBSOLETE_IDE
 160  config SYNC_R4K
 161         bool
 162
 163 +config MIPS_MACHINE
 164 +       def_bool n
 165 +
 166  config NO_IOPORT
 167         def_bool n
 168
 169 --- a/arch/mips/kernel/proc.c
 170 +++ b/arch/mips/kernel/proc.c
 171 @@ -12,6 +12,7 @@
 172  #include <asm/cpu-features.h>
 173  #include <asm/mipsregs.h>
 174  #include <asm/processor.h>
 175 +#include <asm/mips_machine.h>
 176
 177  unsigned int vced_count, vcei_count;
 178
 179 @@ -31,8 +32,12 @@ static int show_cpuinfo(struct seq_file
 180         /*
 181          * For the first processor also print the system type
 182          */
 183 -       if (n == 0)
 184 +       if (n == 0) {
 185                 seq_printf(m, "system type\t\t: %s\n", get_system_type());
 186 +               if (mips_get_machine_name())
 187 +                       seq_printf(m, "machine\t\t\t: %s\n",
 188 +                                  mips_get_machine_name());
 189 +       }
 190
 191         seq_printf(m, "processor\t\t: %ld\n", n);
 192         sprintf(fmt, "cpu model\t\t: %%s V%%d.%%d%s\n",
 193 --- a/arch/mips/kernel/vmlinux.lds.S
 194 +++ b/arch/mips/kernel/vmlinux.lds.S
 195 @@ -97,6 +97,13 @@ SECTIONS
 196         INIT_TEXT_SECTION(PAGE_SIZE)
 197         INIT_DATA_SECTION(16)
 198
 199 +       . = ALIGN(4);
 200 +       .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
 201 +               __mips_machines_start = .;
 202 +               *(.mips.machines.init)
 203 +               __mips_machines_end = .;
 204 +       }
 205 +
 206         /* .exit.text is discarded at runtime, not link time, to deal with
 207          * references from .rodata
 208          */