diff options
author | Feng Tang <feng.tang@intel.com> | 2009-08-14 19:23:29 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2009-08-28 23:57:34 (GMT) |
commit | efafc8b213e67ed148a5b53ade29ee7b48af907d (patch) | |
tree | 416ffc86b22dcb4a7825b7148d208ff52bdd50d3 /arch/x86 | |
parent | 13e82d023c4c3f13ab1e665cbb917a7ebba8935c (diff) | |
download | linux-fsl-qoriq-efafc8b213e67ed148a5b53ade29ee7b48af907d.tar.xz |
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.org
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/Kconfig | 2 | ||||
-rw-r--r-- | arch/x86/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/x86/kernel/setup.c | 3 | ||||
-rw-r--r-- | arch/x86/kernel/sfi.c | 133 |
4 files changed, 139 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 13ffa5d..d8ba424 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1683,6 +1683,8 @@ source "kernel/power/Kconfig" source "drivers/acpi/Kconfig" +source "drivers/sfi/Kconfig" + config X86_APM_BOOT bool default y diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 430d5b2..6321afa 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -55,6 +55,7 @@ obj-y += step.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-y += cpu/ obj-y += acpi/ +obj-$(CONFIG_SFI) += sfi.o obj-y += reboot.o obj-$(CONFIG_MCA) += mca_32.o obj-$(CONFIG_X86_MSR) += msr.o diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 63f32d2..d784ea2 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -27,6 +27,7 @@ #include <linux/screen_info.h> #include <linux/ioport.h> #include <linux/acpi.h> +#include <linux/sfi.h> #include <linux/apm_bios.h> #include <linux/initrd.h> #include <linux/bootmem.h> @@ -990,6 +991,8 @@ void __init setup_arch(char **cmdline_p) */ acpi_boot_init(); + sfi_init(); + #if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS) /* * get boot-time SMP configuration: diff --git a/arch/x86/kernel/sfi.c b/arch/x86/kernel/sfi.c new file mode 100644 index 0000000..761df3f --- /dev/null +++ b/arch/x86/kernel/sfi.c @@ -0,0 +1,133 @@ +/* + * sfi.c - x86 architecture SFI support. + * + * Copyright (c) 2009, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#define KMSG_COMPONENT "SFI" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/bootmem.h> +#include <linux/cpumask.h> +#include <linux/module.h> +#include <linux/acpi.h> +#include <linux/init.h> +#include <linux/efi.h> +#include <linux/irq.h> +#include <linux/sfi.h> +#include <linux/io.h> + +#include <asm/io_apic.h> +#include <asm/pgtable.h> +#include <asm/mpspec.h> +#include <asm/setup.h> +#include <asm/apic.h> +#include <asm/e820.h> + +#ifdef CONFIG_X86_LOCAL_APIC +static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; + +void __init mp_sfi_register_lapic_address(unsigned long address) +{ + mp_lapic_addr = address; + + set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr); + if (boot_cpu_physical_apicid == -1U) + boot_cpu_physical_apicid = read_apic_id(); + + pr_info("Boot CPU = %d\n", boot_cpu_physical_apicid); +} + +/* All CPUs enumerated by SFI must be present and enabled */ +void __cpuinit mp_sfi_register_lapic(u8 id) +{ + int boot_cpu = 0; + + if (MAX_APICS - id <= 0) { + pr_warning("Processor #%d invalid (max %d)\n", + id, MAX_APICS); + return; + } + + if (id == boot_cpu_physical_apicid) + boot_cpu = 1; + pr_info("registering lapic[%d]\n", id); + + generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR))); +} + +static int __init sfi_parse_cpus(struct sfi_table_header *table) +{ + struct sfi_table_simple *sb; + struct sfi_cpu_table_entry *pentry; + int i; + int cpu_num; + + sb = (struct sfi_table_simple *)table; + cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry); + pentry = (struct sfi_cpu_table_entry *)sb->pentry; + + for (i = 0; i < cpu_num; i++) { + mp_sfi_register_lapic(pentry->apic_id); + pentry++; + } + + smp_found_config = 1; + return 0; +} +#endif /* CONFIG_X86_LOCAL_APIC */ + +#ifdef CONFIG_X86_IO_APIC +static u32 gsi_base; + +static int __init sfi_parse_ioapic(struct sfi_table_header *table) +{ + struct sfi_table_simple *sb; + struct sfi_apic_table_entry *pentry; + int i, num; + + sb = (struct sfi_table_simple *)table; + num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry); + pentry = (struct sfi_apic_table_entry *)sb->pentry; + + for (i = 0; i < num; i++) { + mp_register_ioapic(i, pentry->phys_addr, gsi_base); + gsi_base += io_apic_get_redir_entries(i); + pentry++; + } + + WARN(pic_mode, KERN_WARNING + "SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n"); + pic_mode = 0; + return 0; +} +#endif /* CONFIG_X86_IO_APIC */ + +/* + * sfi_platform_init(): register lapics & io-apics + */ +int __init sfi_platform_init(void) +{ +#ifdef CONFIG_X86_LOCAL_APIC + mp_sfi_register_lapic_address(sfi_lapic_addr); + sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus); +#endif +#ifdef CONFIG_X86_IO_APIC + sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic); +#endif + return 0; +} |