diff options
| author | David Daney <ddaney@caviumnetworks.com> | 2011-02-17 14:47:52 -0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2011-05-19 09:55:49 +0100 |
| commit | e650ce0f083ff9354a10ad66e6bf8c193e8a2755 (patch) | |
| tree | 60452f8a170bdb7d39cff836dd2fc4fe7de605a1 /arch/mips | |
| parent | 7716e6548abed1582a7759666e79d5c612a906c7 (diff) | |
MIPS: Octeon: Don't request interrupts for unused IPI mailbox bits.
We only use the three low-order mailbox bits. Leave the upper bits alone
for possible use by drivers and other software.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2090/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/cavium-octeon/smp.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c index ba78b21cc8d0..716fae6f941a 100644 --- a/arch/mips/cavium-octeon/smp.c +++ b/arch/mips/cavium-octeon/smp.c @@ -37,7 +37,7 @@ static irqreturn_t mailbox_interrupt(int irq, void *dev_id) uint64_t action; /* Load the mailbox register to figure out what we're supposed to do */ - action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid)); + action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid)) & 0xffff; /* Clear the mailbox to clear the interrupt */ cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), action); @@ -200,16 +200,15 @@ void octeon_prepare_cpus(unsigned int max_cpus) if (labi->labi_signature != LABI_SIGNATURE) panic("The bootloader version on this board is incorrect."); #endif - - cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffffffff); + /* + * Only the low order mailbox bits are used for IPIs, leave + * the other bits alone. + */ + cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffff); if (request_irq(OCTEON_IRQ_MBOX0, mailbox_interrupt, IRQF_DISABLED, - "mailbox0", mailbox_interrupt)) { + "SMP-IPI", mailbox_interrupt)) { panic("Cannot request_irq(OCTEON_IRQ_MBOX0)\n"); } - if (request_irq(OCTEON_IRQ_MBOX1, mailbox_interrupt, IRQF_DISABLED, - "mailbox1", mailbox_interrupt)) { - panic("Cannot request_irq(OCTEON_IRQ_MBOX1)\n"); - } } /** |