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MIPS: CM: Add cluster & block args to mips_cm_lock_other()

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With CM >= 3.5 we have the notion of multiple clusters & can access
their CM, CPC & GIC registers via the apporpriate redirect/other
register blocks. In order to allow for this introduce cluster & block
arguments to mips_cm_lock_other() which configures the redirect/other
region to point at the appropriate cluster, core, VP & register block.

Since we now have 4 arguments to mips_cm_lock_other() & a common use is
likely to be to target the cluster, core & VP corresponding to a
particular Linux CPU number we also add a new mips_cm_lock_other_cpu()
helper function which handles that without the caller needing to
manually pull out the cluster, core & VP numbers.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17013/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2017-08-12 19:49:39 -07:00
committed by Ralf Baechle
parent 5616897efd
commit 68923cdc2e
4 changed files with 58 additions and 18 deletions
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arch/mips/kernel/smp.c
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@@ -190,7 +190,7 @@ void mips_smp_send_ipi_mask(const struct cpumask *mask, unsigned int action)
core = cpu_core(&cpu_data[cpu]);
while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) {
mips_cm_lock_other(core, 0);
mips_cm_lock_other_cpu(cpu, CM_GCR_Cx_OTHER_BLOCK_LOCAL);
mips_cpc_lock_other(core);
write_cpc_co_cmd(CPC_Cx_CMD_PWRUP);
mips_cpc_unlock_other();