On 17:01 Wed 30 Jan , Ruslan Bilovol wrote:
> Currently, reading /proc/cpuinfo provides userspace with CPU ID of
> the CPU carrying out the read from the file.
> Userspace using this information may decide what module
> to load or how to configure some specific (and processor-depended)
> settings or so.
> However, since really different SoCs can share same ARM core,
> this information currently is not so useful.
> For example, TI OMAP4460 and OMAP4470 SoCs show the same
> information in the /proc/cpuinfo whereas they are different.
> Since in most cases ARM CPU is a part of some system on a chip (SoC),
> the "cpuinfo" file looks like exactly that place, where this
> information have to be displayed.
>
> So added new line "SoC name" in the "cpuinfo" output for system
> on a chip name. It is placed between CPU information and machine
> information, so the file structure looks gracefully (CPU-SoC-Hardware)
Nack
this break the kernel ABI
and we have now socinfo via sysfs
Best Regards,
J.
>
> Example:
>
> / # cat proc/cpuinfo
> [...]
> CPU variant : 0x2
> CPU part : 0xc09
> CPU revision : 10
>
> SoC name : OMAP4470
>
> Hardware : OMAP4 Blaze Tablet
> Revision : 20edb4
> [...]
>
> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxx>
> ---
> arch/arm/include/asm/setup.h | 1 +
> arch/arm/kernel/setup.c | 9 +++++++++
> 2 files changed, 10 insertions(+)
>
> diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
> index c50f056..621df40 100644
> --- a/arch/arm/include/asm/setup.h
> +++ b/arch/arm/include/asm/setup.h
> @@ -52,5 +52,6 @@ extern struct meminfo meminfo;
> extern int arm_add_memory(phys_addr_t start, phys_addr_t size);
> extern void early_print(const char *str, ...);
> extern void dump_machine_table(void);
> +extern void set_soc_model_name(char *name);
>
> #endif
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 3f6cbb2..bb3805f 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -134,6 +134,7 @@ char elf_platform[ELF_PLATFORM_SIZE];
> EXPORT_SYMBOL(elf_platform);
>
> static const char *cpu_name;
> +static const char *soc_name;
> static const char *machine_name;
> static char __initdata cmd_line[COMMAND_LINE_SIZE];
> struct machine_desc *machine_desc __initdata;
> @@ -493,6 +494,11 @@ static void __init setup_processor(void)
> cpu_init();
> }
>
> +void set_soc_model_name(char *name)
> +{
> + soc_name = name;
> +}
> +
> void __init dump_machine_table(void)
> {
> struct machine_desc *p;
> @@ -902,6 +908,9 @@ static int c_show(struct seq_file *m, void *v)
> seq_printf(m, "CPU revision\t: %d\n\n", cpuid & 15);
> }
>
> + if (soc_name)
> + seq_printf(m, "SoC name\t: %s\n\n", soc_name);
> +
> seq_printf(m, "Hardware\t: %s\n", machine_name);
> seq_printf(m, "Revision\t: %04x\n", system_rev);
> seq_printf(m, "Serial\t\t: %08x%08x\n",
> --
> 1.7.9.5
>
>
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