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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-19 17:44:57 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-20 16:09:50 +1000 |
| commit | 14a43e69ed257a1fadadf9fea2c05adb1686419f (patch) | |
| tree | 82ac1fccd465e7a58533c17d14792ceba73fa63e /arch/powerpc/platforms/powernv/smp.c | |
| parent | 817c21ad9a1f00926f080265493923ada3458c63 (diff) | |
powerpc/powernv: Basic support for OPAL
Add definition of OPAL interfaces along with the wrappers to call
into OPAL runtime and the early device-tree parsing hook to locate
the OPAL runtime firmware.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/powernv/smp.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/smp.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c index 4f4ec3797eb..e8773668524 100644 --- a/arch/powerpc/platforms/powernv/smp.c +++ b/arch/powerpc/platforms/powernv/smp.c @@ -30,6 +30,7 @@ #include <asm/vdso_datapage.h> #include <asm/cputhreads.h> #include <asm/xics.h> +#include <asm/opal.h> #include "powernv.h" @@ -62,6 +63,28 @@ static int pnv_smp_cpu_bootable(unsigned int nr) return 1; } +int __devinit pnv_smp_kick_cpu(int nr) +{ + unsigned int pcpu = get_hard_smp_processor_id(nr); + unsigned long start_here = __pa(*((unsigned long *) + generic_secondary_smp_init)); + long rc; + + BUG_ON(nr < 0 || nr >= NR_CPUS); + + /* On OPAL v2 the CPU are still spinning inside OPAL itself, + * get them back now + */ + if (firmware_has_feature(FW_FEATURE_OPALv2)) { + pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu); + rc = opal_start_cpu(pcpu, start_here); + if (rc != OPAL_SUCCESS) + pr_warn("OPAL Error %ld starting CPU %d\n", + rc, nr); + } + return smp_generic_kick_cpu(nr); +} + #ifdef CONFIG_HOTPLUG_CPU static int pnv_smp_cpu_disable(void) @@ -127,7 +150,7 @@ static struct smp_ops_t pnv_smp_ops = { .message_pass = smp_muxed_ipi_message_pass, .cause_ipi = NULL, /* Filled at runtime by xics_smp_probe() */ .probe = xics_smp_probe, - .kick_cpu = smp_generic_kick_cpu, + .kick_cpu = pnv_smp_kick_cpu, .setup_cpu = pnv_smp_setup_cpu, .cpu_bootable = pnv_smp_cpu_bootable, #ifdef CONFIG_HOTPLUG_CPU |