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- Add the mp_topology() function to mp_machdep.c. This function builds up

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the smp_topology structure to reflect the layout of HTT enabled machines.
 - Add a prototype for mp_topology() in smp.h
This commit is contained in:
Jeff Roberson 2003-12-11 03:48:31 +00:00
parent a73ff5105c
commit 59f3a8e626
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=123431
2 changed files with 44 additions and 3 deletions
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46
sys/i386/i386/mp_machdep.c
View File

@ -154,10 +154,10 @@ int boot_cpu_id = -1; /* designated BSP */
extern int nkpt;
/*
* CPU topology map datastructures for HTT. (XXX)
* CPU topology map datastructures for HTT.
*/
struct cpu_group mp_groups[MAXCPU];
struct cpu_top mp_top;
static struct cpu_group mp_groups[MAXCPU];
static struct cpu_top mp_top;
struct cpu_top *smp_topology;
/* AP uses this during bootstrap. Do not staticize. */
@ -213,6 +213,46 @@ static int hlt_cpus_mask;
static int hlt_logical_cpus;
static struct sysctl_ctx_list logical_cpu_clist;
void
mp_topology(void)
{
struct cpu_group *group;
int logical_cpus;
int apic_id;
int groups;
int cpu;
/* Build the smp_topology map. */
/* Nothing to do if there is no HTT support. */
if ((cpu_feature & CPUID_HTT) == 0)
return;
logical_cpus = (cpu_procinfo & CPUID_HTT_CORES) >> 16;
if (logical_cpus <= 1)
return;
group = &mp_groups[0];
groups = 1;
for (cpu = 0, apic_id = 0; apic_id < MAXCPU; apic_id++) {
if (!cpu_info[apic_id].cpu_present)
continue;
/*
* If the current group has members and we're not a logical
* cpu, create a new group.
*/
if (group->cg_count != 0 && (apic_id % logical_cpus) == 0) {
group++;
groups++;
}
group->cg_count++;
group->cg_mask |= 1 << cpu;
cpu++;
}
mp_top.ct_count = groups;
mp_top.ct_group = mp_groups;
smp_topology = &mp_top;
}
/*
* Calculate usable address in base memory for AP trampoline code.
*/

1
sys/i386/include/smp.h
View File

@ -75,6 +75,7 @@ void forward_hardclock(void);
void forwarded_hardclock(struct clockframe frame);
u_int mp_bootaddress(u_int);
int mp_grab_cpu_hlt(void);
void mp_topology(void);
void smp_invlpg(vm_offset_t addr);
void smp_masked_invlpg(u_int mask, vm_offset_t addr);
void smp_invlpg_range(vm_offset_t startva, vm_offset_t endva);