diff options
Diffstat (limited to 'arch/x86/kernel/apic/es7000_32.c')
| -rw-r--r-- | arch/x86/kernel/apic/es7000_32.c | 780 |
1 files changed, 780 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c new file mode 100644 index 000000000000..19588f2770ee --- /dev/null +++ b/arch/x86/kernel/apic/es7000_32.c @@ -0,0 +1,780 @@ +/* + * Written by: Garry Forsgren, Unisys Corporation + * Natalie Protasevich, Unisys Corporation + * + * This file contains the code to configure and interface + * with Unisys ES7000 series hardware system manager. + * + * Copyright (c) 2003 Unisys Corporation. + * Copyright (C) 2009, Red Hat, Inc., Ingo Molnar + * + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Unisys Corporation, Township Line & Union Meeting + * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or: + * + * http://www.unisys.com + */ +#include <linux/notifier.h> +#include <linux/spinlock.h> +#include <linux/cpumask.h> +#include <linux/threads.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/reboot.h> +#include <linux/string.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/acpi.h> +#include <linux/init.h> +#include <linux/nmi.h> +#include <linux/smp.h> +#include <linux/io.h> + +#include <asm/apicdef.h> +#include <asm/atomic.h> +#include <asm/fixmap.h> +#include <asm/mpspec.h> +#include <asm/setup.h> +#include <asm/apic.h> +#include <asm/ipi.h> + +/* + * ES7000 chipsets + */ + +#define NON_UNISYS 0 +#define ES7000_CLASSIC 1 +#define ES7000_ZORRO 2 + +#define MIP_REG 1 +#define MIP_PSAI_REG 4 + +#define MIP_BUSY 1 +#define MIP_SPIN 0xf0000 +#define MIP_VALID 0x0100000000000000ULL +#define MIP_SW_APIC 0x1020b + +#define MIP_PORT(val) ((val >> 32) & 0xffff) + +#define MIP_RD_LO(val) (val & 0xffffffff) + +struct mip_reg { + unsigned long long off_0x00; + unsigned long long off_0x08; + unsigned long long off_0x10; + unsigned long long off_0x18; + unsigned long long off_0x20; + unsigned long long off_0x28; + unsigned long long off_0x30; + unsigned long long off_0x38; +}; + +struct mip_reg_info { + unsigned long long mip_info; + unsigned long long delivery_info; + unsigned long long host_reg; + unsigned long long mip_reg; +}; + +struct psai { + unsigned long long entry_type; + unsigned long long addr; + unsigned long long bep_addr; +}; + +#ifdef CONFIG_ACPI + +struct es7000_oem_table { + struct acpi_table_header Header; + u32 OEMTableAddr; + u32 OEMTableSize; +}; + +static unsigned long oem_addrX; +static unsigned long oem_size; + +#endif + +/* + * ES7000 Globals + */ + +static volatile unsigned long *psai; +static struct mip_reg *mip_reg; +static struct mip_reg *host_reg; +static int mip_port; +static unsigned long mip_addr; +static unsigned long host_addr; + +int es7000_plat; + +/* + * GSI override for ES7000 platforms. + */ + +static unsigned int base; + +static int +es7000_rename_gsi(int ioapic, int gsi) +{ + if (es7000_plat == ES7000_ZORRO) + return gsi; + + if (!base) { + int i; + for (i = 0; i < nr_ioapics; i++) + base += nr_ioapic_registers[i]; + } + + if (!ioapic && (gsi < 16)) + gsi += base; + + return gsi; +} + +static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip) +{ + unsigned long vect = 0, psaival = 0; + + if (psai == NULL) + return -1; + + vect = ((unsigned long)__pa(eip)/0x1000) << 16; + psaival = (0x1000000 | vect | cpu); + + while (*psai & 0x1000000) + ; + + *psai = psaival; + + return 0; +} + +static int es7000_apic_is_cluster(void) +{ + /* MPENTIUMIII */ + if (boot_cpu_data.x86 == 6 && + (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) + return 1; + + return 0; +} + +static void setup_unisys(void) +{ + /* + * Determine the generation of the ES7000 currently running. + * + * es7000_plat = 1 if the machine is a 5xx ES7000 box + * es7000_plat = 2 if the machine is a x86_64 ES7000 box + * + */ + if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2)) + es7000_plat = ES7000_ZORRO; + else + es7000_plat = ES7000_CLASSIC; + ioapic_renumber_irq = es7000_rename_gsi; +} + +/* + * Parse the OEM Table: + */ +static int parse_unisys_oem(char *oemptr) +{ + int i; + int success = 0; + unsigned char type, size; + unsigned long val; + char *tp = NULL; + struct psai *psaip = NULL; + struct mip_reg_info *mi; + struct mip_reg *host, *mip; + + tp = oemptr; + + tp += 8; + + for (i = 0; i <= 6; i++) { + type = *tp++; + size = *tp++; + tp -= 2; + switch (type) { + case MIP_REG: + mi = (struct mip_reg_info *)tp; + val = MIP_RD_LO(mi->host_reg); + host_addr = val; + host = (struct mip_reg *)val; + host_reg = __va(host); + val = MIP_RD_LO(mi->mip_reg); + mip_port = MIP_PORT(mi->mip_info); + mip_addr = val; + mip = (struct mip_reg *)val; + mip_reg = __va(mip); + pr_debug("es7000_mipcfg: host_reg = 0x%lx \n", + (unsigned long)host_reg); + pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n", + (unsigned long)mip_reg); + success++; + break; + case MIP_PSAI_REG: + psaip = (struct psai *)tp; + if (tp != NULL) { + if (psaip->addr) + psai = __va(psaip->addr); + else + psai = NULL; + success++; + } + break; + default: + break; + } + tp += size; + } + + if (success < 2) + es7000_plat = NON_UNISYS; + else + setup_unisys(); + + return es7000_plat; +} + +#ifdef CONFIG_ACPI +static int find_unisys_acpi_oem_table(unsigned long *oem_addr) +{ + struct acpi_table_header *header = NULL; + struct es7000_oem_table *table; + acpi_size tbl_size; + acpi_status ret; + int i = 0; + + for (;;) { + ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size); + if (!ACPI_SUCCESS(ret)) + return -1; + + if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) + break; + + early_acpi_os_unmap_memory(header, tbl_size); + } + + table = (void *)header; + + oem_addrX = table->OEMTableAddr; + oem_size = table->OEMTableSize; + + early_acpi_os_unmap_memory(header, tbl_size); + + *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size); + + return 0; +} + +static void unmap_unisys_acpi_oem_table(unsigned long oem_addr) +{ + if (!oem_addr) + return; + + __acpi_unmap_table((char *)oem_addr, oem_size); +} + +static int es7000_check_dsdt(void) +{ + struct acpi_table_header header; + + if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) && + !strncmp(header.oem_id, "UNISYS", 6)) + return 1; + return 0; +} + +static int es7000_acpi_ret; + +/* Hook from generic ACPI tables.c */ +static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +{ + unsigned long oem_addr = 0; + int check_dsdt; + int ret = 0; + + /* check dsdt at first to avoid clear fix_map for oem_addr */ + check_dsdt = es7000_check_dsdt(); + + if (!find_unisys_acpi_oem_table(&oem_addr)) { + if (check_dsdt) { + ret = parse_unisys_oem((char *)oem_addr); + } else { + setup_unisys(); + ret = 1; + } + /* + * we need to unmap it + */ + unmap_unisys_acpi_oem_table(oem_addr); + } + + es7000_acpi_ret = ret; + + return ret && !es7000_apic_is_cluster(); +} + +static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id) +{ + int ret = es7000_acpi_ret; + + return ret && es7000_apic_is_cluster(); +} + +#else /* !CONFIG_ACPI: */ +static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id) +{ + return 0; +} + +static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id) +{ + return 0; +} +#endif /* !CONFIG_ACPI */ + +static void es7000_spin(int n) +{ + int i = 0; + + while (i++ < n) + rep_nop(); +} + +static int es7000_mip_write(struct mip_reg *mip_reg) +{ + int status = 0; + int spin; + + spin = MIP_SPIN; + while ((host_reg->off_0x38 & MIP_VALID) != 0) { + if (--spin <= 0) { + WARN(1, "Timeout waiting for Host Valid Flag\n"); + return -1; + } + es7000_spin(MIP_SPIN); + } + + memcpy(host_reg, mip_reg, sizeof(struct mip_reg)); + outb(1, mip_port); + + spin = MIP_SPIN; + + while ((mip_reg->off_0x38 & MIP_VALID) == 0) { + if (--spin <= 0) { + WARN(1, "Timeout waiting for MIP Valid Flag\n"); + return -1; + } + es7000_spin(MIP_SPIN); + } + + status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48; + mip_reg->off_0x38 &= ~MIP_VALID; + + return status; +} + +static void es7000_enable_apic_mode(void) +{ + struct mip_reg es7000_mip_reg; + int mip_status; + + if (!es7000_plat) + return; + + printk(KERN_INFO "ES7000: Enabling APIC mode.\n"); + memset(&es7000_mip_reg, 0, sizeof(struct mip_reg)); + es7000_mip_reg.off_0x00 = MIP_SW_APIC; + es7000_mip_reg.off_0x38 = MIP_VALID; + + while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) + WARN(1, "Command failed, status = %x\n", mip_status); +} + +static void es7000_vector_allocation_domain(int cpu, cpumask_t *retmask) +{ + /* Careful. Some cpus do not strictly honor the set of cpus + * specified in the interrupt destination when using lowest + * priority interrupt delivery mode. + * + * In particular there was a hyperthreading cpu observed to + * deliver interrupts to the wrong hyperthread when only one + * hyperthread was specified in the interrupt desitination. + */ + *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } }; +} + + +static void es7000_wait_for_init_deassert(atomic_t *deassert) +{ + while (!atomic_read(deassert)) + cpu_relax(); +} + +static unsigned int es7000_get_apic_id(unsigned long x) +{ + return (x >> 24) & 0xFF; +} + +static void es7000_send_IPI_mask(const struct cpumask *mask, int vector) +{ + default_send_IPI_mask_sequence_phys(mask, vector); +} + +static void es7000_send_IPI_allbutself(int vector) +{ + default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector); +} + +static void es7000_send_IPI_all(int vector) +{ + es7000_send_IPI_mask(cpu_online_mask, vector); +} + +static int es7000_apic_id_registered(void) +{ + return 1; +} + +static const cpumask_t *target_cpus_cluster(void) +{ + return &CPU_MASK_ALL; +} + +static const cpumask_t *es7000_target_cpus(void) +{ + return &cpumask_of_cpu(smp_processor_id()); +} + +static unsigned long +es7000_check_apicid_used(physid_mask_t bitmap, int apicid) +{ + return 0; +} +static unsigned long es7000_check_apicid_present(int bit) +{ + return physid_isset(bit, phys_cpu_present_map); +} + +static unsigned long calculate_ldr(int cpu) +{ + unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu); + + return SET_APIC_LOGICAL_ID(id); +} + +/* + * Set up the logical destination ID. + * + * Intel recommends to set DFR, LdR and TPR before enabling + * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel + * document number 292116). So here it goes... + */ +static void es7000_init_apic_ldr_cluster(void) +{ + unsigned long val; + int cpu = smp_processor_id(); + + apic_write(APIC_DFR, APIC_DFR_CLUSTER); + val = calculate_ldr(cpu); + apic_write(APIC_LDR, val); +} + +static void es7000_init_apic_ldr(void) +{ + unsigned long val; + int cpu = smp_processor_id(); + + apic_write(APIC_DFR, APIC_DFR_FLAT); + val = calculate_ldr(cpu); + apic_write(APIC_LDR, val); +} + +static void es7000_setup_apic_routing(void) +{ + int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id()); + + printk(KERN_INFO + "Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n", + (apic_version[apic] == 0x14) ? + "Physical Cluster" : "Logical Cluster", + nr_ioapics, cpus_addr(*es7000_target_cpus())[0]); +} + +static int es7000_apicid_to_node(int logical_apicid) +{ + return 0; +} + + +static int es7000_cpu_present_to_apicid(int mps_cpu) +{ + if (!mps_cpu) + return boot_cpu_physical_apicid; + else if (mps_cpu < nr_cpu_ids) + return per_cpu(x86_bios_cpu_apicid, mps_cpu); + else + return BAD_APICID; +} + +static int cpu_id; + +static physid_mask_t es7000_apicid_to_cpu_present(int phys_apicid) +{ + physid_mask_t mask; + + mask = physid_mask_of_physid(cpu_id); + ++cpu_id; + + return mask; +} + +/* Mapping from cpu number to logical apicid */ +static int es7000_cpu_to_logical_apicid(int cpu) +{ +#ifdef CONFIG_SMP + if (cpu >= nr_cpu_ids) + return BAD_APICID; + return cpu_2_logical_apicid[cpu]; +#else + return logical_smp_processor_id(); +#endif +} + +static physid_mask_t es7000_ioapic_phys_id_map(physid_mask_t phys_map) +{ + /* For clustered we don't have a good way to do this yet - hack */ + return physids_promote(0xff); +} + +static int es7000_check_phys_apicid_present(int cpu_physical_apicid) +{ + boot_cpu_physical_apicid = read_apic_id(); + return 1; +} + +static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask) +{ + unsigned int round = 0; + int cpu, uninitialized_var(apicid); + + /* + * The cpus in the mask must all be on the apic cluster. + */ + for_each_cpu(cpu, cpumask) { + int new_apicid = es7000_cpu_to_logical_apicid(cpu); + + if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) { + WARN(1, "Not a valid mask!"); + + return BAD_APICID; + } + apicid = new_apicid; + round++; + } + return apicid; +} + +static unsigned int +es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask, + const struct cpumask *andmask) +{ + int apicid = es7000_cpu_to_logical_apicid(0); + cpumask_var_t cpumask; + + if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC)) + return apicid; + + cpumask_and(cpumask, inmask, andmask); + cpumask_and(cpumask, cpumask, cpu_online_mask); + apicid = es7000_cpu_mask_to_apicid(cpumask); + + free_cpumask_var(cpumask); + + return apicid; +} + +static int es7000_phys_pkg_id(int cpuid_apic, int index_msb) +{ + return cpuid_apic >> index_msb; +} + +static int probe_es7000(void) +{ + /* probed later in mptable/ACPI hooks */ + return 0; +} + +static int es7000_mps_ret; +static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem, + char *productid) +{ + int ret = 0; + + if (mpc->oemptr) { + struct mpc_oemtable *oem_table = + (struct mpc_oemtable *)mpc->oemptr; + + if (!strncmp(oem, "UNISYS", 6)) + ret = parse_unisys_oem((char *)oem_table); + } + + es7000_mps_ret = ret; + + return ret && !es7000_apic_is_cluster(); +} + +static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem, + char *productid) +{ + int ret = es7000_mps_ret; + + return ret && es7000_apic_is_cluster(); +} + +struct apic apic_es7000_cluster = { + + .name = "es7000", + .probe = probe_es7000, + .acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster, + .apic_id_registered = es7000_apic_id_registered, + + .irq_delivery_mode = dest_LowestPrio, + /* logical delivery broadcast to all procs: */ + .irq_dest_mode = 1, + + .target_cpus = target_cpus_cluster, + .disable_esr = 1, + .dest_logical = 0, + .check_apicid_used = es7000_check_apicid_used, + .check_apicid_present = es7000_check_apicid_present, + + .vector_allocation_domain = es7000_vector_allocation_domain, + .init_apic_ldr = es7000_init_apic_ldr_cluster, + + .ioapic_phys_id_map = es7000_ioapic_phys_id_map, + .setup_apic_routing = es7000_setup_apic_routing, + .multi_timer_check = NULL, + .apicid_to_node = es7000_apicid_to_node, + .cpu_to_logical_apicid = es7000_cpu_to_logical_apicid, + .cpu_present_to_apicid = es7000_cpu_present_to_apicid, + .apicid_to_cpu_present = es7000_apicid_to_cpu_present, + .setup_portio_remap = NULL, + .check_phys_apicid_present = es7000_check_phys_apicid_present, + .enable_apic_mode = es7000_enable_apic_mode, + .phys_pkg_id = es7000_phys_pkg_id, + .mps_oem_check = es7000_mps_oem_check_cluster, + + .get_apic_id = es7000_get_apic_id, + .set_apic_id = NULL, + .apic_id_mask = 0xFF << 24, + + .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid, + .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and, + + .send_IPI_mask = es7000_send_IPI_mask, + .send_IPI_mask_allbutself = NULL, + .send_IPI_allbutself = es7000_send_IPI_allbutself, + .send_IPI_all = es7000_send_IPI_all, + .send_IPI_self = default_send_IPI_self, + + .wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip, + + .trampoline_phys_low = 0x467, + .trampoline_phys_high = 0x469, + + .wait_for_init_deassert = NULL, + + /* Nothing to do for most platforms, since cleared by the INIT cycle: */ + .smp_callin_clear_local_apic = NULL, + .inquire_remote_apic = default_inquire_remote_apic, + + .read = native_apic_mem_read, + .write = native_apic_mem_write, + .icr_read = native_apic_icr_read, + .icr_write = native_apic_icr_write, + .wait_icr_idle = native_apic_wait_icr_idle, + .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, +}; + +struct apic apic_es7000 = { + + .name = "es7000", + .probe = probe_es7000, + .acpi_madt_oem_check = es7000_acpi_madt_oem_check, + .apic_id_registered = es7000_apic_id_registered, + + .irq_delivery_mode = dest_Fixed, + /* phys delivery to target CPUs: */ + .irq_dest_mode = 0, + + .target_cpus = es7000_target_cpus, + .disable_esr = 1, + .dest_logical = 0, + .check_apicid_used = es7000_check_apicid_used, + .check_apicid_present = es7000_check_apicid_present, + + .vector_allocation_domain = es7000_vector_allocation_domain, + .init_apic_ldr = es7000_init_apic_ldr, + + .ioapic_phys_id_map = es7000_ioapic_phys_id_map, + .setup_apic_routing = es7000_setup_apic_routing, + .multi_timer_check = NULL, + .apicid_to_node = es7000_apicid_to_node, + .cpu_to_logical_apicid = es7000_cpu_to_logical_apicid, + .cpu_present_to_apicid = es7000_cpu_present_to_apicid, + .apicid_to_cpu_present = es7000_apicid_to_cpu_present, + .setup_portio_remap = NULL, + .check_phys_apicid_present = es7000_check_phys_apicid_present, + .enable_apic_mode = es7000_enable_apic_mode, + .phys_pkg_id = es7000_phys_pkg_id, + .mps_oem_check = es7000_mps_oem_check, + + .get_apic_id = es7000_get_apic_id, + .set_apic_id = NULL, + .apic_id_mask = 0xFF << 24, + + .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid, + .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and, + + .send_IPI_mask = es7000_send_IPI_mask, + .send_IPI_mask_allbutself = NULL, + .send_IPI_allbutself = es7000_send_IPI_allbutself, + .send_IPI_all = es7000_send_IPI_all, + .send_IPI_self = default_send_IPI_self, + + .trampoline_phys_low = 0x467, + .trampoline_phys_high = 0x469, + + .wait_for_init_deassert = es7000_wait_for_init_deassert, + + /* Nothing to do for most platforms, since cleared by the INIT cycle: */ + .smp_callin_clear_local_apic = NULL, + .inquire_remote_apic = default_inquire_remote_apic, + + .read = native_apic_mem_read, + .write = native_apic_mem_write, + .icr_read = native_apic_icr_read, + .icr_write = native_apic_icr_write, + .wait_icr_idle = native_apic_wait_icr_idle, + .safe_wait_icr_idle = native_safe_apic_wait_icr_idle, +}; 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