03ae5768b6
Replace the hardcoded list of initialization functions for each CPU vendor by a list in an ELF section, which is read at initialization in arch/x86/kernel/cpu/cpu.c to fill the cpu_devs[] array. The ELF section, named .x86cpuvendor.init, is reclaimed after boot, and contains entries of type "struct cpu_vendor_dev" which associates a vendor number with a pointer to a "struct cpu_dev" structure. This first modification allows to remove all the VENDOR_init_cpu() functions. This patch also removes the hardcoded calls to early_init_amd() and early_init_intel(). Instead, we add a "c_early_init" member to the cpu_dev structure, which is then called if not NULL by the generic CPU initialization code. Unfortunately, in early_cpu_detect(), this_cpu is not yet set, so we have to use the cpu_devs[] array directly. This patch is part of the Linux Tiny project, and is needed for further patch that will allow to disable compilation of unused CPU support code. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
38 lines
1,008 B
C
38 lines
1,008 B
C
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struct cpu_model_info {
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int vendor;
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int family;
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char *model_names[16];
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};
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/* attempt to consolidate cpu attributes */
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struct cpu_dev {
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char * c_vendor;
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/* some have two possibilities for cpuid string */
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char * c_ident[2];
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struct cpu_model_info c_models[4];
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void (*c_early_init)(struct cpuinfo_x86 *c);
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void (*c_init)(struct cpuinfo_x86 * c);
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void (*c_identify)(struct cpuinfo_x86 * c);
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unsigned int (*c_size_cache)(struct cpuinfo_x86 * c, unsigned int size);
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};
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extern struct cpu_dev * cpu_devs [X86_VENDOR_NUM];
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struct cpu_vendor_dev {
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int vendor;
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struct cpu_dev *cpu_dev;
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};
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#define cpu_vendor_dev_register(cpu_vendor_id, cpu_dev) \
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static struct cpu_vendor_dev __cpu_vendor_dev_##cpu_vendor_id __used \
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__attribute__((__section__(".x86cpuvendor.init"))) = \
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{ cpu_vendor_id, cpu_dev }
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extern struct cpu_vendor_dev __x86cpuvendor_start[], __x86cpuvendor_end[];
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extern int get_model_name(struct cpuinfo_x86 *c);
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extern void display_cacheinfo(struct cpuinfo_x86 *c);
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