+++ /dev/null
-/*
- * IBM Summit-Specific Code
- *
- * Written By: Matthew Dobson, IBM Corporation
- *
- * Copyright (c) 2003 IBM Corp.
- *
- * All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Send feedback to <colpatch@us.ibm.com>
- *
- */
-
-#define pr_fmt(fmt) "summit: %s: " fmt, __func__
-
-#include <linux/mm.h>
-#include <asm/io.h>
-#include <asm/bios_ebda.h>
-
-/*
- * APIC driver for the IBM "Summit" chipset.
- */
-#include <linux/threads.h>
-#include <linux/cpumask.h>
-#include <asm/mpspec.h>
-#include <asm/apic.h>
-#include <asm/smp.h>
-#include <asm/fixmap.h>
-#include <asm/apicdef.h>
-#include <asm/ipi.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/gfp.h>
-#include <linux/smp.h>
-
-static unsigned summit_get_apic_id(unsigned long x)
-{
- return (x >> 24) & 0xFF;
-}
-
-static inline void summit_send_IPI_mask(const struct cpumask *mask, int vector)
-{
- default_send_IPI_mask_sequence_logical(mask, vector);
-}
-
-static void summit_send_IPI_allbutself(int vector)
-{
- default_send_IPI_mask_allbutself_logical(cpu_online_mask, vector);
-}
-
-static void summit_send_IPI_all(int vector)
-{
- summit_send_IPI_mask(cpu_online_mask, vector);
-}
-
-#include <asm/tsc.h>
-
-extern int use_cyclone;
-
-#ifdef CONFIG_X86_SUMMIT_NUMA
-static void setup_summit(void);
-#else
-static inline void setup_summit(void) {}
-#endif
-
-static int summit_mps_oem_check(struct mpc_table *mpc, char *oem,
- char *productid)
-{
- if (!strncmp(oem, "IBM ENSW", 8) &&
- (!strncmp(productid, "VIGIL SMP", 9)
- || !strncmp(productid, "EXA", 3)
- || !strncmp(productid, "RUTHLESS SMP", 12))){
- mark_tsc_unstable("Summit based system");
- use_cyclone = 1; /*enable cyclone-timer*/
- setup_summit();
- return 1;
- }
- return 0;
-}
-
-/* Hook from generic ACPI tables.c */
-static int summit_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-{
- if (!strncmp(oem_id, "IBM", 3) &&
- (!strncmp(oem_table_id, "SERVIGIL", 8)
- || !strncmp(oem_table_id, "EXA", 3))){
- mark_tsc_unstable("Summit based system");
- use_cyclone = 1; /*enable cyclone-timer*/
- setup_summit();
- return 1;
- }
- return 0;
-}
-
-struct rio_table_hdr {
- unsigned char version; /* Version number of this data structure */
- /* Version 3 adds chassis_num & WP_index */
- unsigned char num_scal_dev; /* # of Scalability devices (Twisters for Vigil) */
- unsigned char num_rio_dev; /* # of RIO I/O devices (Cyclones and Winnipegs) */
-} __attribute__((packed));
-
-struct scal_detail {
- unsigned char node_id; /* Scalability Node ID */
- unsigned long CBAR; /* Address of 1MB register space */
- unsigned char port0node; /* Node ID port connected to: 0xFF=None */
- unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
- unsigned char port1node; /* Node ID port connected to: 0xFF = None */
- unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
- unsigned char port2node; /* Node ID port connected to: 0xFF = None */
- unsigned char port2port; /* Port num port connected to: 0,1,2, or 0xFF=None */
- unsigned char chassis_num; /* 1 based Chassis number (1 = boot node) */
-} __attribute__((packed));
-
-struct rio_detail {
- unsigned char node_id; /* RIO Node ID */
- unsigned long BBAR; /* Address of 1MB register space */
- unsigned char type; /* Type of device */
- unsigned char owner_id; /* For WPEG: Node ID of Cyclone that owns this WPEG*/
- /* For CYC: Node ID of Twister that owns this CYC */
- unsigned char port0node; /* Node ID port connected to: 0xFF=None */
- unsigned char port0port; /* Port num port connected to: 0,1,2, or 0xFF=None */
- unsigned char port1node; /* Node ID port connected to: 0xFF=None */
- unsigned char port1port; /* Port num port connected to: 0,1,2, or 0xFF=None */
- unsigned char first_slot; /* For WPEG: Lowest slot number below this WPEG */
- /* For CYC: 0 */
- unsigned char status; /* For WPEG: Bit 0 = 1 : the XAPIC is used */
- /* = 0 : the XAPIC is not used, ie:*/
- /* ints fwded to another XAPIC */
- /* Bits1:7 Reserved */
- /* For CYC: Bits0:7 Reserved */
- unsigned char WP_index; /* For WPEG: WPEG instance index - lower ones have */
- /* lower slot numbers/PCI bus numbers */
- /* For CYC: No meaning */
- unsigned char chassis_num; /* 1 based Chassis number */
- /* For LookOut WPEGs this field indicates the */
- /* Expansion Chassis #, enumerated from Boot */
- /* Node WPEG external port, then Boot Node CYC */
- /* external port, then Next Vigil chassis WPEG */
- /* external port, etc. */
- /* Shared Lookouts have only 1 chassis number (the */
- /* first one assigned) */
-} __attribute__((packed));
-
-
-typedef enum {
- CompatTwister = 0, /* Compatibility Twister */
- AltTwister = 1, /* Alternate Twister of internal 8-way */
- CompatCyclone = 2, /* Compatibility Cyclone */
- AltCyclone = 3, /* Alternate Cyclone of internal 8-way */
- CompatWPEG = 4, /* Compatibility WPEG */
- AltWPEG = 5, /* Second Planar WPEG */
- LookOutAWPEG = 6, /* LookOut WPEG */
- LookOutBWPEG = 7, /* LookOut WPEG */
-} node_type;
-
-static inline int is_WPEG(struct rio_detail *rio){
- return (rio->type == CompatWPEG || rio->type == AltWPEG ||
- rio->type == LookOutAWPEG || rio->type == LookOutBWPEG);
-}
-
-#define SUMMIT_APIC_DFR_VALUE (APIC_DFR_CLUSTER)
-
-static const struct cpumask *summit_target_cpus(void)
-{
- /* CPU_MASK_ALL (0xff) has undefined behaviour with
- * dest_LowestPrio mode logical clustered apic interrupt routing
- * Just start on cpu 0. IRQ balancing will spread load
- */
- return cpumask_of(0);
-}
-
-static unsigned long summit_check_apicid_used(physid_mask_t *map, int apicid)
-{
- return 0;
-}
-
-/* we don't use the phys_cpu_present_map to indicate apicid presence */
-static unsigned long summit_check_apicid_present(int bit)
-{
- return 1;
-}
-
-static int summit_early_logical_apicid(int cpu)
-{
- int count = 0;
- u8 my_id = early_per_cpu(x86_cpu_to_apicid, cpu);
- u8 my_cluster = APIC_CLUSTER(my_id);
-#ifdef CONFIG_SMP
- u8 lid;
- int i;
-
- /* Create logical APIC IDs by counting CPUs already in cluster. */
- for (count = 0, i = nr_cpu_ids; --i >= 0; ) {
- lid = early_per_cpu(x86_cpu_to_logical_apicid, i);
- if (lid != BAD_APICID && APIC_CLUSTER(lid) == my_cluster)
- ++count;
- }
-#endif
- /* We only have a 4 wide bitmap in cluster mode. If a deranged
- * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
- BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
- return my_cluster | (1UL << count);
-}
-
-static void summit_init_apic_ldr(void)
-{
- int cpu = smp_processor_id();
- unsigned long id = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
- unsigned long val;
-
- apic_write(APIC_DFR, SUMMIT_APIC_DFR_VALUE);
- val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
- val |= SET_APIC_LOGICAL_ID(id);
- apic_write(APIC_LDR, val);
-}
-
-static int summit_apic_id_registered(void)
-{
- return 1;
-}
-
-static void summit_setup_apic_routing(void)
-{
- pr_info("Enabling APIC mode: Summit. Using %d I/O APICs\n",
- nr_ioapics);
-}
-
-static int summit_cpu_present_to_apicid(int mps_cpu)
-{
- if (mps_cpu < nr_cpu_ids)
- return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
- else
- return BAD_APICID;
-}
-
-static void summit_ioapic_phys_id_map(physid_mask_t *phys_id_map, physid_mask_t *retmap)
-{
- /* For clustered we don't have a good way to do this yet - hack */
- physids_promote(0x0FL, retmap);
-}
-
-static void summit_apicid_to_cpu_present(int apicid, physid_mask_t *retmap)
-{
- physid_set_mask_of_physid(0, retmap);
-}
-
-static int summit_check_phys_apicid_present(int physical_apicid)
-{
- return 1;
-}
-
-static inline int
-summit_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
-{
- unsigned int round = 0;
- unsigned int cpu, apicid = 0;
-
- /*
- * The cpus in the mask must all be on the apic cluster.
- */
- for_each_cpu_and(cpu, cpumask, cpu_online_mask) {
- int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
-
- if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
- pr_err("Not a valid mask!\n");
- return -EINVAL;
- }
- apicid |= new_apicid;
- round++;
- }
- if (!round)
- return -EINVAL;
- *dest_id = apicid;
- return 0;
-}
-
-static int
-summit_cpu_mask_to_apicid_and(const struct cpumask *inmask,
- const struct cpumask *andmask,
- unsigned int *apicid)
-{
- cpumask_var_t cpumask;
- *apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
-
- if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
- return 0;
-
- cpumask_and(cpumask, inmask, andmask);
- summit_cpu_mask_to_apicid(cpumask, apicid);
-
- free_cpumask_var(cpumask);
-
- return 0;
-}
-
-/*
- * cpuid returns the value latched in the HW at reset, not the APIC ID
- * register's value. For any box whose BIOS changes APIC IDs, like
- * clustered APIC systems, we must use hard_smp_processor_id.
- *
- * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID.
- */
-static int summit_phys_pkg_id(int cpuid_apic, int index_msb)
-{
- return hard_smp_processor_id() >> index_msb;
-}
-
-static int probe_summit(void)
-{
- /* probed later in mptable/ACPI hooks */
- return 0;
-}
-
-#ifdef CONFIG_X86_SUMMIT_NUMA
-static struct rio_table_hdr *rio_table_hdr;
-static struct scal_detail *scal_devs[MAX_NUMNODES];
-static struct rio_detail *rio_devs[MAX_NUMNODES*4];
-
-#ifndef CONFIG_X86_NUMAQ
-static int mp_bus_id_to_node[MAX_MP_BUSSES];
-#endif
-
-static int setup_pci_node_map_for_wpeg(int wpeg_num, int last_bus)
-{
- int twister = 0, node = 0;
- int i, bus, num_buses;
-
- for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
- if (rio_devs[i]->node_id == rio_devs[wpeg_num]->owner_id) {
- twister = rio_devs[i]->owner_id;
- break;
- }
- }
- if (i == rio_table_hdr->num_rio_dev) {
- pr_err("Couldn't find owner Cyclone for Winnipeg!\n");
- return last_bus;
- }
-
- for (i = 0; i < rio_table_hdr->num_scal_dev; i++) {
- if (scal_devs[i]->node_id == twister) {
- node = scal_devs[i]->node_id;
- break;
- }
- }
- if (i == rio_table_hdr->num_scal_dev) {
- pr_err("Couldn't find owner Twister for Cyclone!\n");
- return last_bus;
- }
-
- switch (rio_devs[wpeg_num]->type) {
- case CompatWPEG:
- /*
- * The Compatibility Winnipeg controls the 2 legacy buses,
- * the 66MHz PCI bus [2 slots] and the 2 "extra" buses in case
- * a PCI-PCI bridge card is used in either slot: total 5 buses.
- */
- num_buses = 5;
- break;
- case AltWPEG:
- /*
- * The Alternate Winnipeg controls the 2 133MHz buses [1 slot
- * each], their 2 "extra" buses, the 100MHz bus [2 slots] and
- * the "extra" buses for each of those slots: total 7 buses.
- */
- num_buses = 7;
- break;
- case LookOutAWPEG:
- case LookOutBWPEG:
- /*
- * A Lookout Winnipeg controls 3 100MHz buses [2 slots each]
- * & the "extra" buses for each of those slots: total 9 buses.
- */
- num_buses = 9;
- break;
- default:
- pr_info("Unsupported Winnipeg type!\n");
- return last_bus;
- }
-
- for (bus = last_bus; bus < last_bus + num_buses; bus++)
- mp_bus_id_to_node[bus] = node;
- return bus;
-}
-
-static int build_detail_arrays(void)
-{
- unsigned long ptr;
- int i, scal_detail_size, rio_detail_size;
-
- if (rio_table_hdr->num_scal_dev > MAX_NUMNODES) {
- pr_warn("MAX_NUMNODES too low! Defined as %d, but system has %d nodes\n",
- MAX_NUMNODES, rio_table_hdr->num_scal_dev);
- return 0;
- }
-
- switch (rio_table_hdr->version) {
- default:
- pr_warn("Invalid Rio Grande Table Version: %d\n",
- rio_table_hdr->version);
- return 0;
- case 2:
- scal_detail_size = 11;
- rio_detail_size = 13;
- break;
- case 3:
- scal_detail_size = 12;
- rio_detail_size = 15;
- break;
- }
-
- ptr = (unsigned long)rio_table_hdr + 3;
- for (i = 0; i < rio_table_hdr->num_scal_dev; i++, ptr += scal_detail_size)
- scal_devs[i] = (struct scal_detail *)ptr;
-
- for (i = 0; i < rio_table_hdr->num_rio_dev; i++, ptr += rio_detail_size)
- rio_devs[i] = (struct rio_detail *)ptr;
-
- return 1;
-}
-
-void setup_summit(void)
-{
- unsigned long ptr;
- unsigned short offset;
- int i, next_wpeg, next_bus = 0;
-
- /* The pointer to the EBDA is stored in the word @ phys 0x40E(40:0E) */
- ptr = get_bios_ebda();
- ptr = (unsigned long)phys_to_virt(ptr);
-
- rio_table_hdr = NULL;
- offset = 0x180;
- while (offset) {
- /* The block id is stored in the 2nd word */
- if (*((unsigned short *)(ptr + offset + 2)) == 0x4752) {
- /* set the pointer past the offset & block id */
- rio_table_hdr = (struct rio_table_hdr *)(ptr + offset + 4);
- break;
- }
- /* The next offset is stored in the 1st word. 0 means no more */
- offset = *((unsigned short *)(ptr + offset));
- }
- if (!rio_table_hdr) {
- pr_err("Unable to locate Rio Grande Table in EBDA - bailing!\n");
- return;
- }
-
- if (!build_detail_arrays())
- return;
-
- /* The first Winnipeg we're looking for has an index of 0 */
- next_wpeg = 0;
- do {
- for (i = 0; i < rio_table_hdr->num_rio_dev; i++) {
- if (is_WPEG(rio_devs[i]) && rio_devs[i]->WP_index == next_wpeg) {
- /* It's the Winnipeg we're looking for! */
- next_bus = setup_pci_node_map_for_wpeg(i, next_bus);
- next_wpeg++;
- break;
- }
- }
- /*
- * If we go through all Rio devices and don't find one with
- * the next index, it means we've found all the Winnipegs,
- * and thus all the PCI buses.
- */
- if (i == rio_table_hdr->num_rio_dev)
- next_wpeg = 0;
- } while (next_wpeg != 0);
-}
-#endif
-
-static struct apic apic_summit = {
-
- .name = "summit",
- .probe = probe_summit,
- .acpi_madt_oem_check = summit_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
- .apic_id_registered = summit_apic_id_registered,
-
- .irq_delivery_mode = dest_LowestPrio,
- /* logical delivery broadcast to all CPUs: */
- .irq_dest_mode = 1,
-
- .target_cpus = summit_target_cpus,
- .disable_esr = 1,
- .dest_logical = APIC_DEST_LOGICAL,
- .check_apicid_used = summit_check_apicid_used,
- .check_apicid_present = summit_check_apicid_present,
-
- .vector_allocation_domain = flat_vector_allocation_domain,
- .init_apic_ldr = summit_init_apic_ldr,
-
- .ioapic_phys_id_map = summit_ioapic_phys_id_map,
- .setup_apic_routing = summit_setup_apic_routing,
- .multi_timer_check = NULL,
- .cpu_present_to_apicid = summit_cpu_present_to_apicid,
- .apicid_to_cpu_present = summit_apicid_to_cpu_present,
- .setup_portio_remap = NULL,
- .check_phys_apicid_present = summit_check_phys_apicid_present,
- .enable_apic_mode = NULL,
- .phys_pkg_id = summit_phys_pkg_id,
- .mps_oem_check = summit_mps_oem_check,
-
- .get_apic_id = summit_get_apic_id,
- .set_apic_id = NULL,
- .apic_id_mask = 0xFF << 24,
-
- .cpu_mask_to_apicid_and = summit_cpu_mask_to_apicid_and,
-
- .send_IPI_mask = summit_send_IPI_mask,
- .send_IPI_mask_allbutself = NULL,
- .send_IPI_allbutself = summit_send_IPI_allbutself,
- .send_IPI_all = summit_send_IPI_all,
- .send_IPI_self = default_send_IPI_self,
-
- .trampoline_phys_low = DEFAULT_TRAMPOLINE_PHYS_LOW,
- .trampoline_phys_high = DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
- .wait_for_init_deassert = true,
- .smp_callin_clear_local_apic = NULL,
- .inquire_remote_apic = default_inquire_remote_apic,
-
- .read = native_apic_mem_read,
- .write = native_apic_mem_write,
- .eoi_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,
-
- .x86_32_early_logical_apicid = summit_early_logical_apicid,
-};
-
-apic_driver(apic_summit);
projects / platform / kernel / linux-rpi.git / commitdiff