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ce187c3c15
Implement the GICv3 logic to recalculate the highest priority pending interrupt for each CPU after some part of the GIC state has changed. We avoid unnecessary full recalculation where possible. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Shannon Zhao <shannon.zhao@linaro.org> Tested-by: Shannon Zhao <shannon.zhao@linaro.org> Message-id: 1465915112-29272-11-git-send-email-peter.maydell@linaro.org
317 lines
10 KiB
C
317 lines
10 KiB
C
/*
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* ARM GICv3 support - internal interfaces
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*
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* Copyright (c) 2012 Linaro Limited
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* Copyright (c) 2015 Huawei.
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* Copyright (c) 2015 Samsung Electronics Co., Ltd.
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* Written by Peter Maydell
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* Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef QEMU_ARM_GICV3_INTERNAL_H
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#define QEMU_ARM_GICV3_INTERNAL_H
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#include "hw/intc/arm_gicv3_common.h"
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/* Distributor registers, as offsets from the distributor base address */
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#define GICD_CTLR 0x0000
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#define GICD_TYPER 0x0004
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#define GICD_IIDR 0x0008
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#define GICD_STATUSR 0x0010
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#define GICD_SETSPI_NSR 0x0040
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#define GICD_CLRSPI_NSR 0x0048
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#define GICD_SETSPI_SR 0x0050
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#define GICD_CLRSPI_SR 0x0058
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#define GICD_SEIR 0x0068
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#define GICD_IGROUPR 0x0080
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#define GICD_ISENABLER 0x0100
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#define GICD_ICENABLER 0x0180
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#define GICD_ISPENDR 0x0200
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#define GICD_ICPENDR 0x0280
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#define GICD_ISACTIVER 0x0300
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#define GICD_ICACTIVER 0x0380
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#define GICD_IPRIORITYR 0x0400
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#define GICD_ITARGETSR 0x0800
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#define GICD_ICFGR 0x0C00
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#define GICD_IGRPMODR 0x0D00
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#define GICD_NSACR 0x0E00
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#define GICD_SGIR 0x0F00
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#define GICD_CPENDSGIR 0x0F10
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#define GICD_SPENDSGIR 0x0F20
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#define GICD_IROUTER 0x6000
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#define GICD_IDREGS 0xFFD0
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/* GICD_CTLR fields */
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#define GICD_CTLR_EN_GRP0 (1U << 0)
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#define GICD_CTLR_EN_GRP1NS (1U << 1) /* GICv3 5.3.20 */
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#define GICD_CTLR_EN_GRP1S (1U << 2)
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#define GICD_CTLR_EN_GRP1_ALL (GICD_CTLR_EN_GRP1NS | GICD_CTLR_EN_GRP1S)
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/* Bit 4 is ARE if the system doesn't support TrustZone, ARE_S otherwise */
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#define GICD_CTLR_ARE (1U << 4)
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#define GICD_CTLR_ARE_S (1U << 4)
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#define GICD_CTLR_ARE_NS (1U << 5)
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#define GICD_CTLR_DS (1U << 6)
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#define GICD_CTLR_E1NWF (1U << 7)
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#define GICD_CTLR_RWP (1U << 31)
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/*
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* Redistributor frame offsets from RD_base
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*/
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#define GICR_SGI_OFFSET 0x10000
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/*
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* Redistributor registers, offsets from RD_base
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*/
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#define GICR_CTLR 0x0000
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#define GICR_IIDR 0x0004
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#define GICR_TYPER 0x0008
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#define GICR_STATUSR 0x0010
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#define GICR_WAKER 0x0014
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#define GICR_SETLPIR 0x0040
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#define GICR_CLRLPIR 0x0048
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#define GICR_PROPBASER 0x0070
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#define GICR_PENDBASER 0x0078
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#define GICR_INVLPIR 0x00A0
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#define GICR_INVALLR 0x00B0
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#define GICR_SYNCR 0x00C0
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#define GICR_IDREGS 0xFFD0
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/* SGI and PPI Redistributor registers, offsets from RD_base */
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#define GICR_IGROUPR0 (GICR_SGI_OFFSET + 0x0080)
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#define GICR_ISENABLER0 (GICR_SGI_OFFSET + 0x0100)
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#define GICR_ICENABLER0 (GICR_SGI_OFFSET + 0x0180)
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#define GICR_ISPENDR0 (GICR_SGI_OFFSET + 0x0200)
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#define GICR_ICPENDR0 (GICR_SGI_OFFSET + 0x0280)
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#define GICR_ISACTIVER0 (GICR_SGI_OFFSET + 0x0300)
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#define GICR_ICACTIVER0 (GICR_SGI_OFFSET + 0x0380)
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#define GICR_IPRIORITYR (GICR_SGI_OFFSET + 0x0400)
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#define GICR_ICFGR0 (GICR_SGI_OFFSET + 0x0C00)
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#define GICR_ICFGR1 (GICR_SGI_OFFSET + 0x0C04)
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#define GICR_IGRPMODR0 (GICR_SGI_OFFSET + 0x0D00)
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#define GICR_NSACR (GICR_SGI_OFFSET + 0x0E00)
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#define GICR_CTLR_ENABLE_LPIS (1U << 0)
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#define GICR_CTLR_RWP (1U << 3)
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#define GICR_CTLR_DPG0 (1U << 24)
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#define GICR_CTLR_DPG1NS (1U << 25)
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#define GICR_CTLR_DPG1S (1U << 26)
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#define GICR_CTLR_UWP (1U << 31)
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#define GICR_TYPER_PLPIS (1U << 0)
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#define GICR_TYPER_VLPIS (1U << 1)
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#define GICR_TYPER_DIRECTLPI (1U << 3)
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#define GICR_TYPER_LAST (1U << 4)
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#define GICR_TYPER_DPGS (1U << 5)
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#define GICR_TYPER_PROCNUM (0xFFFFU << 8)
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#define GICR_TYPER_COMMONLPIAFF (0x3 << 24)
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#define GICR_TYPER_AFFINITYVALUE (0xFFFFFFFFULL << 32)
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#define GICR_WAKER_ProcessorSleep (1U << 1)
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#define GICR_WAKER_ChildrenAsleep (1U << 2)
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#define GICR_PROPBASER_OUTER_CACHEABILITY_MASK (7ULL << 56)
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#define GICR_PROPBASER_ADDR_MASK (0xfffffffffULL << 12)
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#define GICR_PROPBASER_SHAREABILITY_MASK (3U << 10)
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#define GICR_PROPBASER_CACHEABILITY_MASK (7U << 7)
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#define GICR_PROPBASER_IDBITS_MASK (0x1f)
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#define GICR_PENDBASER_PTZ (1ULL << 62)
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#define GICR_PENDBASER_OUTER_CACHEABILITY_MASK (7ULL << 56)
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#define GICR_PENDBASER_ADDR_MASK (0xffffffffULL << 16)
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#define GICR_PENDBASER_SHAREABILITY_MASK (3U << 10)
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#define GICR_PENDBASER_CACHEABILITY_MASK (7U << 7)
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#define ICC_CTLR_EL1_CBPR (1U << 0)
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#define ICC_CTLR_EL1_EOIMODE (1U << 1)
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#define ICC_CTLR_EL1_PMHE (1U << 6)
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#define ICC_CTLR_EL1_PRIBITS_SHIFT 8
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#define ICC_CTLR_EL1_IDBITS_SHIFT 11
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#define ICC_CTLR_EL1_SEIS (1U << 14)
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#define ICC_CTLR_EL1_A3V (1U << 15)
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#define ICC_PMR_PRIORITY_MASK 0xff
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#define ICC_BPR_BINARYPOINT_MASK 0x07
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#define ICC_IGRPEN_ENABLE 0x01
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#define ICC_CTLR_EL3_CBPR_EL1S (1U << 0)
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#define ICC_CTLR_EL3_CBPR_EL1NS (1U << 1)
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#define ICC_CTLR_EL3_EOIMODE_EL3 (1U << 2)
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#define ICC_CTLR_EL3_EOIMODE_EL1S (1U << 3)
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#define ICC_CTLR_EL3_EOIMODE_EL1NS (1U << 4)
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#define ICC_CTLR_EL3_RM (1U << 5)
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#define ICC_CTLR_EL3_PMHE (1U << 6)
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#define ICC_CTLR_EL3_PRIBITS_SHIFT 8
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#define ICC_CTLR_EL3_IDBITS_SHIFT 11
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#define ICC_CTLR_EL3_SEIS (1U << 14)
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#define ICC_CTLR_EL3_A3V (1U << 15)
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#define ICC_CTLR_EL3_NDS (1U << 17)
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/* Functions internal to the emulated GICv3 */
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/**
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* gicv3_redist_update:
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* @cs: GICv3CPUState for this redistributor
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*
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* Recalculate the highest priority pending interrupt after a
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* change to redistributor state, and inform the CPU accordingly.
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*/
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void gicv3_redist_update(GICv3CPUState *cs);
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/**
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* gicv3_update:
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* @s: GICv3State
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* @start: first interrupt whose state changed
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* @len: length of the range of interrupts whose state changed
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*
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* Recalculate the highest priority pending interrupts after a
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* change to the distributor state affecting @len interrupts
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* starting at @start, and inform the CPUs accordingly.
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*/
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void gicv3_update(GICv3State *s, int start, int len);
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/**
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* gicv3_full_update_noirqset:
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* @s: GICv3State
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*
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* Recalculate the cached information about highest priority
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* pending interrupts, but don't inform the CPUs. This should be
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* called after an incoming migration has loaded new state.
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*/
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void gicv3_full_update_noirqset(GICv3State *s);
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/**
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* gicv3_full_update:
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* @s: GICv3State
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*
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* Recalculate the highest priority pending interrupts after
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* a change that could affect the status of all interrupts,
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* and inform the CPUs accordingly.
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*/
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void gicv3_full_update(GICv3State *s);
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/**
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* gicv3_cpuif_update:
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* @cs: GICv3CPUState for the CPU to update
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*
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* Recalculate whether to assert the IRQ or FIQ lines after a change
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* to the current highest priority pending interrupt, the CPU's
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* current running priority or the CPU's current exception level or
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* security state.
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*/
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static inline void gicv3_cpuif_update(GICv3CPUState *cs)
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{
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/* This will be implemented in a later commit. */
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}
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static inline uint32_t gicv3_iidr(void)
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{
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/* Return the Implementer Identification Register value
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* for the emulated GICv3, as reported in GICD_IIDR and GICR_IIDR.
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*
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* We claim to be an ARM r0p0 with a zero ProductID.
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* This is the same as an r0p0 GIC-500.
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*/
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return 0x43b;
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}
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static inline uint32_t gicv3_idreg(int regoffset)
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{
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/* Return the value of the CoreSight ID register at the specified
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* offset from the first ID register (as found in the distributor
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* and redistributor register banks).
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* These values indicate an ARM implementation of a GICv3.
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*/
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static const uint8_t gicd_ids[] = {
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0x44, 0x00, 0x00, 0x00, 0x92, 0xB4, 0x3B, 0x00, 0x0D, 0xF0, 0x05, 0xB1
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};
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return gicd_ids[regoffset / 4];
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}
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/**
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* gicv3_irq_group:
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*
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* Return the group which this interrupt is configured as (GICV3_G0,
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* GICV3_G1 or GICV3_G1NS).
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*/
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static inline int gicv3_irq_group(GICv3State *s, GICv3CPUState *cs, int irq)
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{
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bool grpbit, grpmodbit;
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if (irq < GIC_INTERNAL) {
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grpbit = extract32(cs->gicr_igroupr0, irq, 1);
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grpmodbit = extract32(cs->gicr_igrpmodr0, irq, 1);
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} else {
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grpbit = gicv3_gicd_group_test(s, irq);
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grpmodbit = gicv3_gicd_grpmod_test(s, irq);
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}
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if (grpbit) {
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return GICV3_G1NS;
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}
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if (s->gicd_ctlr & GICD_CTLR_DS) {
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return GICV3_G0;
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}
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return grpmodbit ? GICV3_G1 : GICV3_G0;
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}
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/**
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* gicv3_redist_affid:
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*
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* Return the 32-bit affinity ID of the CPU connected to this redistributor
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*/
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static inline uint32_t gicv3_redist_affid(GICv3CPUState *cs)
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{
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return cs->gicr_typer >> 32;
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}
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/**
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* gicv3_cache_target_cpustate:
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*
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* Update the cached CPU state corresponding to the target for this interrupt
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* (which is kept in s->gicd_irouter_target[]).
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*/
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static inline void gicv3_cache_target_cpustate(GICv3State *s, int irq)
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{
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GICv3CPUState *cs = NULL;
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int i;
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uint32_t tgtaff = extract64(s->gicd_irouter[irq], 0, 24) |
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extract64(s->gicd_irouter[irq], 32, 8) << 24;
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for (i = 0; i < s->num_cpu; i++) {
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if (s->cpu[i].gicr_typer >> 32 == tgtaff) {
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cs = &s->cpu[i];
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break;
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}
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}
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s->gicd_irouter_target[irq] = cs;
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}
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/**
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* gicv3_cache_all_target_cpustates:
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*
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* Populate the entire cache of CPU state pointers for interrupt targets
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* (eg after inbound migration or CPU reset)
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*/
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static inline void gicv3_cache_all_target_cpustates(GICv3State *s)
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{
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int irq;
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for (irq = GIC_INTERNAL; irq < GICV3_MAXIRQ; irq++) {
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gicv3_cache_target_cpustate(s, irq);
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}
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}
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#endif /* !QEMU_ARM_GIC_INTERNAL_H */
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