diff options
| author | Andy Fleming <afleming@freescale.com> | 2011-12-08 01:20:27 -0600 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-07-29 19:26:20 -0500 |
| commit | e16c8765533a155ebd3d7c36fc80440a03bbf46a (patch) | |
| tree | 8e4c3ab9fd85d3a852889c13012017b5cf8770b7 /arch/powerpc/kernel/prom.c | |
| parent | 7251a24e4d3acf2d7826e1c42fe84258c312a742 (diff) | |
powerpc/e6500: Add support for hardware threads
The general idea is that each core will release all of its
threads into the secondary thread startup code, which will
eventually wait in the secondary core holding area, for the
appropriate bit in the PACA to be set. The kick_cpu function
pointer will set that bit in the PACA, and thus "release"
the core/thread to boot. We also need to do a few things that
U-Boot normally does for CPUs (like enable branch prediction).
Signed-off-by: Andy Fleming <afleming@freescale.com>
[scottwood@freescale.com: various changes, including only enabling
threads if Linux wants to kick them]
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/kernel/prom.c')
| -rw-r--r-- | arch/powerpc/kernel/prom.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 613a860a203c..0448b1e9c0ae 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -309,12 +309,10 @@ static int __init early_init_dt_scan_cpus(unsigned long node, /* Get physical cpuid */ intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len); - if (intserv) { - nthreads = len / sizeof(int); - } else { - intserv = of_get_flat_dt_prop(node, "reg", NULL); - nthreads = 1; - } + if (!intserv) + intserv = of_get_flat_dt_prop(node, "reg", &len); + + nthreads = len / sizeof(int); /* * Now see if any of these threads match our boot cpu. |