| Harry Liebel | eaec590 | 2013-12-12 13:00:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * |
| 7 | * Redistributions of source code must retain the above copyright notice, this |
| 8 | * list of conditions and the following disclaimer. |
| 9 | * |
| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * Neither the name of ARM nor the names of its contributors may be used |
| 15 | * to endorse or promote products derived from this software without specific |
| 16 | * prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 28 | * POSSIBILITY OF SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <stdint.h> |
| 32 | #include <arch.h> |
| 33 | #include <platform.h> |
| Harry Liebel | eaec590 | 2013-12-12 13:00:29 +0000 | [diff] [blame] | 34 | #include <gic_v3.h> |
| 35 | #include <debug.h> |
| 36 | |
| 37 | uintptr_t gicv3_get_rdist(uintptr_t gicr_base, uint64_t mpidr) |
| 38 | { |
| 39 | uint32_t cpu_aff, gicr_aff; |
| 40 | uint64_t gicr_typer; |
| 41 | uintptr_t addr; |
| 42 | |
| 43 | /* Construct the affinity as used by GICv3. MPIDR and GIC affinity level |
| 44 | * mask is the same. |
| 45 | */ |
| 46 | cpu_aff = ((mpidr >> MPIDR_AFF0_SHIFT) & MPIDR_AFFLVL_MASK) << |
| 47 | GICV3_AFF0_SHIFT; |
| 48 | cpu_aff |= ((mpidr >> MPIDR_AFF1_SHIFT) & MPIDR_AFFLVL_MASK) << |
| 49 | GICV3_AFF1_SHIFT; |
| 50 | cpu_aff |= ((mpidr >> MPIDR_AFF2_SHIFT) & MPIDR_AFFLVL_MASK) << |
| 51 | GICV3_AFF2_SHIFT; |
| 52 | cpu_aff |= ((mpidr >> MPIDR_AFF3_SHIFT) & MPIDR_AFFLVL_MASK) << |
| 53 | GICV3_AFF3_SHIFT; |
| 54 | |
| 55 | addr = gicr_base; |
| 56 | do { |
| 57 | gicr_typer = gicr_read_typer(addr); |
| 58 | |
| 59 | gicr_aff = (gicr_typer >> GICR_TYPER_AFF_SHIFT) & |
| 60 | GICR_TYPER_AFF_MASK; |
| 61 | if (cpu_aff == gicr_aff) { |
| Harry Liebel | d19e497 | 2014-02-24 12:01:27 +0000 | [diff] [blame] | 62 | /* Disable this print for now as it appears every time |
| 63 | * when using PSCI CPU_SUSPEND. |
| 64 | * TODO: Print this only the first time for each CPU. |
| 65 | * INFO("GICv3 - Found RDIST for MPIDR(0x%lx) at 0x%lx\n", |
| 66 | * mpidr, addr); |
| 67 | */ |
| Harry Liebel | eaec590 | 2013-12-12 13:00:29 +0000 | [diff] [blame] | 68 | return addr; |
| 69 | } |
| 70 | |
| 71 | /* TODO: |
| 72 | * For GICv4 we need to adjust the Base address based on |
| 73 | * GICR_TYPER.VLPIS |
| 74 | */ |
| 75 | addr += (1 << GICR_PCPUBASE_SHIFT); |
| 76 | |
| 77 | } while (!(gicr_typer & GICR_TYPER_LAST)); |
| 78 | |
| 79 | /* If we get here we did not find a match. */ |
| 80 | ERROR("GICv3 - Did not find RDIST for CPU with MPIDR 0x%lx\n", mpidr); |
| 81 | return (uintptr_t)NULL; |
| 82 | } |