x86: add arch-specific SFI support
arch/x86/kernel/sfi.c serves the dual-purpose of supporting the SFI core with arch specific code, as well as a home for the arch-specific code that uses SFI. analogous to ACPI, drivers/sfi/Kconfig is pulled in by arch/x86/Kconfig Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Cc: x86@kernel.orghifive-unleashed-5.1
Feng Tang
Len Brown
parent
13e82d023c
commit
efafc8b213
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@ -1683,6 +1683,8 @@ source "kernel/power/Kconfig"
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source "drivers/acpi/Kconfig"
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source "drivers/sfi/Kconfig"
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config X86_APM_BOOT
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bool
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default y
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@ -55,6 +55,7 @@ obj-y += step.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-y += cpu/
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obj-y += acpi/
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obj-$(CONFIG_SFI) += sfi.o
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obj-y += reboot.o
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obj-$(CONFIG_MCA) += mca_32.o
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obj-$(CONFIG_X86_MSR) += msr.o
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@ -27,6 +27,7 @@
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#include <linux/screen_info.h>
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#include <linux/ioport.h>
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#include <linux/acpi.h>
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#include <linux/sfi.h>
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#include <linux/apm_bios.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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@ -990,6 +991,8 @@ void __init setup_arch(char **cmdline_p)
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*/
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acpi_boot_init();
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sfi_init();
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#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
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/*
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* get boot-time SMP configuration:
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@ -0,0 +1,133 @@
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/*
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* sfi.c - x86 architecture SFI support.
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*
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* Copyright (c) 2009, Intel Corporation.
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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 and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#define KMSG_COMPONENT "SFI"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/bootmem.h>
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#include <linux/cpumask.h>
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/efi.h>
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#include <linux/irq.h>
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#include <linux/sfi.h>
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#include <linux/io.h>
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#include <asm/io_apic.h>
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#include <asm/pgtable.h>
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#include <asm/mpspec.h>
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#include <asm/setup.h>
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#include <asm/apic.h>
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#include <asm/e820.h>
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#ifdef CONFIG_X86_LOCAL_APIC
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static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
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void __init mp_sfi_register_lapic_address(unsigned long address)
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{
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mp_lapic_addr = address;
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set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
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if (boot_cpu_physical_apicid == -1U)
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boot_cpu_physical_apicid = read_apic_id();
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pr_info("Boot CPU = %d\n", boot_cpu_physical_apicid);
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}
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/* All CPUs enumerated by SFI must be present and enabled */
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void __cpuinit mp_sfi_register_lapic(u8 id)
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{
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int boot_cpu = 0;
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if (MAX_APICS - id <= 0) {
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pr_warning("Processor #%d invalid (max %d)\n",
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id, MAX_APICS);
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return;
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}
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if (id == boot_cpu_physical_apicid)
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boot_cpu = 1;
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pr_info("registering lapic[%d]\n", id);
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generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
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}
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static int __init sfi_parse_cpus(struct sfi_table_header *table)
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{
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struct sfi_table_simple *sb;
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struct sfi_cpu_table_entry *pentry;
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int i;
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int cpu_num;
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sb = (struct sfi_table_simple *)table;
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cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
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pentry = (struct sfi_cpu_table_entry *)sb->pentry;
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for (i = 0; i < cpu_num; i++) {
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mp_sfi_register_lapic(pentry->apic_id);
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pentry++;
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}
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smp_found_config = 1;
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return 0;
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}
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#endif /* CONFIG_X86_LOCAL_APIC */
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#ifdef CONFIG_X86_IO_APIC
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static u32 gsi_base;
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static int __init sfi_parse_ioapic(struct sfi_table_header *table)
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{
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struct sfi_table_simple *sb;
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struct sfi_apic_table_entry *pentry;
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int i, num;
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sb = (struct sfi_table_simple *)table;
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num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
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pentry = (struct sfi_apic_table_entry *)sb->pentry;
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for (i = 0; i < num; i++) {
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mp_register_ioapic(i, pentry->phys_addr, gsi_base);
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gsi_base += io_apic_get_redir_entries(i);
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pentry++;
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}
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WARN(pic_mode, KERN_WARNING
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"SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
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pic_mode = 0;
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return 0;
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}
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#endif /* CONFIG_X86_IO_APIC */
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/*
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* sfi_platform_init(): register lapics & io-apics
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*/
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int __init sfi_platform_init(void)
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{
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#ifdef CONFIG_X86_LOCAL_APIC
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mp_sfi_register_lapic_address(sfi_lapic_addr);
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sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
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#endif
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#ifdef CONFIG_X86_IO_APIC
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sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
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#endif
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return 0;
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}
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