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authorAnton Blanchard <anton@samba.org>2006-03-25 17:25:17 +1100
committerPaul Mackerras <paulus@samba.org>2006-03-27 14:48:48 +1100
commit4df20460a3ff0d60280738b094945c56cb5567a5 (patch)
tree39f831cf5f778b14a08b3453a8f798b2b8be8813 /arch/powerpc/kernel/setup_64.c
parentb4f382a3e5e20ba867e7aa5b01189a3fd40eea2c (diff)
[PATCH] powerpc: Allow non zero boot cpuids
We currently have a hack to flip the boot cpu and its secondary thread to logical cpuid 0 and 1. This means the logical - physical mapping will differ depending on which cpu is boot cpu. This is most apparent on kexec, where we might kexec on any cpu and therefore change the mapping from boot to boot. The patch below does a first pass early on to work out the logical cpuid of the boot thread. We then fix up some paca structures to match. Ive also removed the boot_cpuid_phys variable for ppc64, to be consistent we use get_hard_smp_processor_id(boot_cpuid) everywhere. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
-rw-r--r--arch/powerpc/kernel/setup_64.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 2f3fdad3559..6c9b093c23a 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -73,7 +73,6 @@
int have_of = 1;
int boot_cpuid = 0;
-int boot_cpuid_phys = 0;
dev_t boot_dev;
u64 ppc64_pft_size;
@@ -208,7 +207,6 @@ static struct machdep_calls __initdata *machines[] = {
void __init early_setup(unsigned long dt_ptr)
{
- struct paca_struct *lpaca = get_paca();
static struct machdep_calls **mach;
/* Enable early debugging if any specified (see udbg.h) */
@@ -223,6 +221,14 @@ void __init early_setup(unsigned long dt_ptr)
*/
early_init_devtree(__va(dt_ptr));
+ /* Now we know the logical id of our boot cpu, setup the paca. */
+ setup_boot_paca();
+
+ /* Fix up paca fields required for the boot cpu */
+ get_paca()->cpu_start = 1;
+ get_paca()->stab_real = __pa((u64)&initial_stab);
+ get_paca()->stab_addr = (u64)&initial_stab;
+
/*
* Iterate all ppc_md structures until we find the proper
* one for the current machine type
@@ -260,7 +266,7 @@ void __init early_setup(unsigned long dt_ptr)
if (cpu_has_feature(CPU_FTR_SLB))
slb_initialize();
else
- stab_initialize(lpaca->stab_real);
+ stab_initialize(get_paca()->stab_real);
}
DBG(" <- early_setup()\n");