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Fixes and Sandybridge support for lapic cpu init 

- preprocessor macros should not use defined(CONFIG_*) but
  just CONFIG_*
- drop AMD CPU model 14XXX config variable use. Those do not exist.
- skip some delays on Sandybridge systems
- Count how long we're waiting for each AP to stop
- Skip speedstep specific CPU entries

Change-Id: I13db384ba4e28acbe7f0f8c9cd169954b39f167d
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/871
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Stefan Reinauer 2012-04-03 16:17:11 -07:00 committed by Stefan Reinauer
parent f8c7c2396e
commit 2bdfb48b13
2 changed files with 14 additions and 4 deletions
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15
src/cpu/x86/lapic/lapic_cpu_init.c
View File

@ -14,6 +14,7 @@
#include <smp/atomic.h>
#include <smp/spinlock.h>
#include <cpu/cpu.h>
#include <cpu/intel/speedstep.h>
#if CONFIG_SMP == 1
/* This is a lot more paranoid now, since Linux can NOT handle
@ -108,7 +109,7 @@ static int lapic_start_cpu(unsigned long apicid)
}
return 0;
}
#if !defined (CONFIG_CPU_AMD_MODEL_10XXX) && !defined (CONFIG_CPU_AMD_MODEL_14XXX)
#if !CONFIG_CPU_AMD_MODEL_10XXX && !CONFIG_CPU_INTEL_MODEL_206AX
mdelay(10);
#endif
@ -136,7 +137,7 @@ static int lapic_start_cpu(unsigned long apicid)
start_eip = get_valid_start_eip((unsigned long)_secondary_start);
#if !defined (CONFIG_CPU_AMD_MODEL_10XXX) && !defined (CONFIG_CPU_AMD_MODEL_14XXX)
#if !CONFIG_CPU_AMD_MODEL_10XXX
num_starts = 2;
#else
num_starts = 1;
@ -269,7 +270,7 @@ int start_cpu(device_t cpu)
break;
}
udelay(10);
}
}
}
secondary_stack = 0;
spin_unlock(&start_cpu_lock);
@ -446,6 +447,8 @@ static void wait_other_cpus_stop(struct bus *cpu_bus)
{
device_t cpu;
int old_active_count, active_count;
long loopcount = 0;
/* Now loop until the other cpus have finished initializing */
old_active_count = 1;
active_count = atomic_read(&active_cpus);
@ -456,17 +459,21 @@ static void wait_other_cpus_stop(struct bus *cpu_bus)
}
udelay(10);
active_count = atomic_read(&active_cpus);
loopcount++;
}
for(cpu = cpu_bus->children; cpu; cpu = cpu->sibling) {
if (cpu->path.type != DEVICE_PATH_APIC) {
continue;
}
if (cpu->path.apic.apic_id == SPEEDSTEP_APIC_MAGIC) {
continue;
}
if (!cpu->initialized) {
printk(BIOS_ERR, "CPU 0x%02x did not initialize!\n",
cpu->path.apic.apic_id);
}
}
printk(BIOS_DEBUG, "All AP CPUs stopped\n");
printk(BIOS_DEBUG, "All AP CPUs stopped (%ld loops)\n", loopcount);
}
#else /* CONFIG_SMP */

3
src/include/cpu/intel/speedstep.h
View File

@ -19,6 +19,9 @@
* MA 02110-1301 USA
*/
/* Magic value used to locate speedstep configuration in the device tree */
#define SPEEDSTEP_APIC_MAGIC 0xACAC
/* MWAIT coordination I/O base address. This must match
* the \_PR_.CPU0 PM base address.
*/