projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 72e20142 PB |
1 | /* |
| 2 | * Copyright (C) 2013 Imagination Technologies | |
| 3 | * Author: Paul Burton <paul.burton@imgtec.com> | |
| 4 | * | |
| 5 | * Based on smp-cmp.c: | |
| 6 | * Copyright (C) 2007 MIPS Technologies, Inc. | |
| 7 | * Author: Chris Dearman (chris@mips.com) | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify it | |
| 10 | * under the terms of the GNU General Public License as published by the | |
| 11 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 12 | * option) any later version. | |
| 13 | */ | |
| 14 | ||
| 4060bbe9 | 15 | #include <linux/irqchip/mips-gic.h> |
| 72e20142 PB |
16 | #include <linux/printk.h> |
| 17 | ||
| d0508944 | 18 | #include <asm/mips-cpc.h> |
| 72e20142 PB |
19 | #include <asm/smp-ops.h> |
| 20 | ||
| 21 | void gic_send_ipi_single(int cpu, unsigned int action) | |
| 22 | { | |
| 23 | unsigned long flags; | |
| 24 | unsigned int intr; | |
| d0508944 | 25 | unsigned int core = cpu_data[cpu].core; |
| 72e20142 PB |
26 | |
| 27 | pr_debug("CPU%d: %s cpu %d action %u status %08x\n", | |
| 28 | smp_processor_id(), __func__, cpu, action, read_c0_status()); | |
| 29 | ||
| 30 | local_irq_save(flags); | |
| 31 | ||
| 32 | switch (action) { | |
| 33 | case SMP_CALL_FUNCTION: | |
| 34 | intr = plat_ipi_call_int_xlate(cpu); | |
| 35 | break; | |
| 36 | ||
| 37 | case SMP_RESCHEDULE_YOURSELF: | |
| 38 | intr = plat_ipi_resched_int_xlate(cpu); | |
| 39 | break; | |
| 40 | ||
| 41 | default: | |
| 42 | BUG(); | |
| 43 | } | |
| 44 | ||
| 45 | gic_send_ipi(intr); | |
| d0508944 PB |
46 | |
| 47 | if (mips_cpc_present() && (core != current_cpu_data.core)) { | |
| 48 | while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) { | |
| 4ede3161 | 49 | mips_cm_lock_other(core, 0); |
| d0508944 PB |
50 | mips_cpc_lock_other(core); |
| 51 | write_cpc_co_cmd(CPC_Cx_CMD_PWRUP); | |
| 52 | mips_cpc_unlock_other(); | |
| 4ede3161 | 53 | mips_cm_unlock_other(); |
| d0508944 PB |
54 | } |
| 55 | } | |
| 56 | ||
| 72e20142 PB |
57 | local_irq_restore(flags); |
| 58 | } | |
| 59 | ||
| 60 | void gic_send_ipi_mask(const struct cpumask *mask, unsigned int action) | |
| 61 | { | |
| 62 | unsigned int i; | |
| 63 | ||
| 64 | for_each_cpu(i, mask) | |
| 65 | gic_send_ipi_single(i, action); | |
| 66 | } |