mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 00:01:35 +00:00
4f0628963c
Impact: cleanup 1) &cpu_online_map -> cpu_online_mask 2) first_cpu/next_cpu_nr -> cpumask_first/cpumask_next 3) cpu_*_map manipulation -> init_cpu_* / set_cpu_* Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
268 lines
6.3 KiB
C
268 lines
6.3 KiB
C
/*
|
|
* APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
|
|
*
|
|
* Drives the local APIC in "clustered mode".
|
|
*/
|
|
#include <linux/threads.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/apicdef.h>
|
|
#include <asm/fixmap.h>
|
|
#include <asm/mpspec.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/ipi.h>
|
|
|
|
static unsigned bigsmp_get_apic_id(unsigned long x)
|
|
{
|
|
return (x >> 24) & 0xFF;
|
|
}
|
|
|
|
static int bigsmp_apic_id_registered(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static const struct cpumask *bigsmp_target_cpus(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
return cpu_online_mask;
|
|
#else
|
|
return cpumask_of(0);
|
|
#endif
|
|
}
|
|
|
|
static unsigned long bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static unsigned long bigsmp_check_apicid_present(int bit)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static inline unsigned long calculate_ldr(int cpu)
|
|
{
|
|
unsigned long val, id;
|
|
|
|
val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
|
|
id = per_cpu(x86_bios_cpu_apicid, cpu);
|
|
val |= SET_APIC_LOGICAL_ID(id);
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* 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 bigsmp_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 bigsmp_setup_apic_routing(void)
|
|
{
|
|
printk(KERN_INFO
|
|
"Enabling APIC mode: Physflat. Using %d I/O APICs\n",
|
|
nr_ioapics);
|
|
}
|
|
|
|
static int bigsmp_apicid_to_node(int logical_apicid)
|
|
{
|
|
return apicid_2_node[hard_smp_processor_id()];
|
|
}
|
|
|
|
static int bigsmp_cpu_present_to_apicid(int mps_cpu)
|
|
{
|
|
if (mps_cpu < nr_cpu_ids)
|
|
return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
|
|
|
|
return BAD_APICID;
|
|
}
|
|
|
|
static physid_mask_t bigsmp_apicid_to_cpu_present(int phys_apicid)
|
|
{
|
|
return physid_mask_of_physid(phys_apicid);
|
|
}
|
|
|
|
/* Mapping from cpu number to logical apicid */
|
|
static inline int bigsmp_cpu_to_logical_apicid(int cpu)
|
|
{
|
|
if (cpu >= nr_cpu_ids)
|
|
return BAD_APICID;
|
|
return cpu_physical_id(cpu);
|
|
}
|
|
|
|
static physid_mask_t bigsmp_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(0xFFL);
|
|
}
|
|
|
|
static int bigsmp_check_phys_apicid_present(int boot_cpu_physical_apicid)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* As we are using single CPU as destination, pick only one CPU here */
|
|
static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask)
|
|
{
|
|
return bigsmp_cpu_to_logical_apicid(cpumask_first(cpumask));
|
|
}
|
|
|
|
static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
|
|
const struct cpumask *andmask)
|
|
{
|
|
int cpu;
|
|
|
|
/*
|
|
* We're using fixed IRQ delivery, can only return one phys APIC ID.
|
|
* May as well be the first.
|
|
*/
|
|
for_each_cpu_and(cpu, cpumask, andmask) {
|
|
if (cpumask_test_cpu(cpu, cpu_online_mask))
|
|
break;
|
|
}
|
|
if (cpu < nr_cpu_ids)
|
|
return bigsmp_cpu_to_logical_apicid(cpu);
|
|
|
|
return BAD_APICID;
|
|
}
|
|
|
|
static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
|
|
{
|
|
return cpuid_apic >> index_msb;
|
|
}
|
|
|
|
static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
|
|
{
|
|
default_send_IPI_mask_sequence_phys(mask, vector);
|
|
}
|
|
|
|
static void bigsmp_send_IPI_allbutself(int vector)
|
|
{
|
|
default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
|
|
}
|
|
|
|
static void bigsmp_send_IPI_all(int vector)
|
|
{
|
|
bigsmp_send_IPI_mask(cpu_online_mask, vector);
|
|
}
|
|
|
|
static int dmi_bigsmp; /* can be set by dmi scanners */
|
|
|
|
static int hp_ht_bigsmp(const struct dmi_system_id *d)
|
|
{
|
|
printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
|
|
dmi_bigsmp = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct dmi_system_id bigsmp_dmi_table[] = {
|
|
{ hp_ht_bigsmp, "HP ProLiant DL760 G2",
|
|
{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
|
|
}
|
|
},
|
|
|
|
{ hp_ht_bigsmp, "HP ProLiant DL740",
|
|
{ DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
|
|
DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
|
|
}
|
|
},
|
|
{ } /* NULL entry stops DMI scanning */
|
|
};
|
|
|
|
static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask)
|
|
{
|
|
cpumask_clear(retmask);
|
|
cpumask_set_cpu(cpu, retmask);
|
|
}
|
|
|
|
static int probe_bigsmp(void)
|
|
{
|
|
if (def_to_bigsmp)
|
|
dmi_bigsmp = 1;
|
|
else
|
|
dmi_check_system(bigsmp_dmi_table);
|
|
|
|
return dmi_bigsmp;
|
|
}
|
|
|
|
struct apic apic_bigsmp = {
|
|
|
|
.name = "bigsmp",
|
|
.probe = probe_bigsmp,
|
|
.acpi_madt_oem_check = NULL,
|
|
.apic_id_registered = bigsmp_apic_id_registered,
|
|
|
|
.irq_delivery_mode = dest_Fixed,
|
|
/* phys delivery to target CPU: */
|
|
.irq_dest_mode = 0,
|
|
|
|
.target_cpus = bigsmp_target_cpus,
|
|
.disable_esr = 1,
|
|
.dest_logical = 0,
|
|
.check_apicid_used = bigsmp_check_apicid_used,
|
|
.check_apicid_present = bigsmp_check_apicid_present,
|
|
|
|
.vector_allocation_domain = bigsmp_vector_allocation_domain,
|
|
.init_apic_ldr = bigsmp_init_apic_ldr,
|
|
|
|
.ioapic_phys_id_map = bigsmp_ioapic_phys_id_map,
|
|
.setup_apic_routing = bigsmp_setup_apic_routing,
|
|
.multi_timer_check = NULL,
|
|
.apicid_to_node = bigsmp_apicid_to_node,
|
|
.cpu_to_logical_apicid = bigsmp_cpu_to_logical_apicid,
|
|
.cpu_present_to_apicid = bigsmp_cpu_present_to_apicid,
|
|
.apicid_to_cpu_present = bigsmp_apicid_to_cpu_present,
|
|
.setup_portio_remap = NULL,
|
|
.check_phys_apicid_present = bigsmp_check_phys_apicid_present,
|
|
.enable_apic_mode = NULL,
|
|
.phys_pkg_id = bigsmp_phys_pkg_id,
|
|
.mps_oem_check = NULL,
|
|
|
|
.get_apic_id = bigsmp_get_apic_id,
|
|
.set_apic_id = NULL,
|
|
.apic_id_mask = 0xFF << 24,
|
|
|
|
.cpu_mask_to_apicid = bigsmp_cpu_mask_to_apicid,
|
|
.cpu_mask_to_apicid_and = bigsmp_cpu_mask_to_apicid_and,
|
|
|
|
.send_IPI_mask = bigsmp_send_IPI_mask,
|
|
.send_IPI_mask_allbutself = NULL,
|
|
.send_IPI_allbutself = bigsmp_send_IPI_allbutself,
|
|
.send_IPI_all = bigsmp_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 = default_wait_for_init_deassert,
|
|
|
|
.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,
|
|
};
|