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qemu/hw/intc/gicv3_internal.h
Peter Maydell 227a865366 hw/intc/arm_gicv3: Add IRQ handling CPU interface registers 
Add the CPU interface registers which deal with acknowledging
and dismissing interrupts.

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: 1465915112-29272-19-git-send-email-peter.maydell@linaro.org
2016-06-17 15:23:51 +01:00

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/*
* ARM GICv3 support - internal interfaces
*
* Copyright (c) 2012 Linaro Limited
* Copyright (c) 2015 Huawei.
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Written by Peter Maydell
* Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef QEMU_ARM_GICV3_INTERNAL_H
#define QEMU_ARM_GICV3_INTERNAL_H
#include "hw/intc/arm_gicv3_common.h"
/* Distributor registers, as offsets from the distributor base address */
#define GICD_CTLR 0x0000
#define GICD_TYPER 0x0004
#define GICD_IIDR 0x0008
#define GICD_STATUSR 0x0010
#define GICD_SETSPI_NSR 0x0040
#define GICD_CLRSPI_NSR 0x0048
#define GICD_SETSPI_SR 0x0050
#define GICD_CLRSPI_SR 0x0058
#define GICD_SEIR 0x0068
#define GICD_IGROUPR 0x0080
#define GICD_ISENABLER 0x0100
#define GICD_ICENABLER 0x0180
#define GICD_ISPENDR 0x0200
#define GICD_ICPENDR 0x0280
#define GICD_ISACTIVER 0x0300
#define GICD_ICACTIVER 0x0380
#define GICD_IPRIORITYR 0x0400
#define GICD_ITARGETSR 0x0800
#define GICD_ICFGR 0x0C00
#define GICD_IGRPMODR 0x0D00
#define GICD_NSACR 0x0E00
#define GICD_SGIR 0x0F00
#define GICD_CPENDSGIR 0x0F10
#define GICD_SPENDSGIR 0x0F20
#define GICD_IROUTER 0x6000
#define GICD_IDREGS 0xFFD0
/* GICD_CTLR fields */
#define GICD_CTLR_EN_GRP0 (1U << 0)
#define GICD_CTLR_EN_GRP1NS (1U << 1) /* GICv3 5.3.20 */
#define GICD_CTLR_EN_GRP1S (1U << 2)
#define GICD_CTLR_EN_GRP1_ALL (GICD_CTLR_EN_GRP1NS | GICD_CTLR_EN_GRP1S)
/* Bit 4 is ARE if the system doesn't support TrustZone, ARE_S otherwise */
#define GICD_CTLR_ARE (1U << 4)
#define GICD_CTLR_ARE_S (1U << 4)
#define GICD_CTLR_ARE_NS (1U << 5)
#define GICD_CTLR_DS (1U << 6)
#define GICD_CTLR_E1NWF (1U << 7)
#define GICD_CTLR_RWP (1U << 31)
/*
* Redistributor frame offsets from RD_base
*/
#define GICR_SGI_OFFSET 0x10000
/*
* Redistributor registers, offsets from RD_base
*/
#define GICR_CTLR 0x0000
#define GICR_IIDR 0x0004
#define GICR_TYPER 0x0008
#define GICR_STATUSR 0x0010
#define GICR_WAKER 0x0014
#define GICR_SETLPIR 0x0040
#define GICR_CLRLPIR 0x0048
#define GICR_PROPBASER 0x0070
#define GICR_PENDBASER 0x0078
#define GICR_INVLPIR 0x00A0
#define GICR_INVALLR 0x00B0
#define GICR_SYNCR 0x00C0
#define GICR_IDREGS 0xFFD0
/* SGI and PPI Redistributor registers, offsets from RD_base */
#define GICR_IGROUPR0 (GICR_SGI_OFFSET + 0x0080)
#define GICR_ISENABLER0 (GICR_SGI_OFFSET + 0x0100)
#define GICR_ICENABLER0 (GICR_SGI_OFFSET + 0x0180)
#define GICR_ISPENDR0 (GICR_SGI_OFFSET + 0x0200)
#define GICR_ICPENDR0 (GICR_SGI_OFFSET + 0x0280)
#define GICR_ISACTIVER0 (GICR_SGI_OFFSET + 0x0300)
#define GICR_ICACTIVER0 (GICR_SGI_OFFSET + 0x0380)
#define GICR_IPRIORITYR (GICR_SGI_OFFSET + 0x0400)
#define GICR_ICFGR0 (GICR_SGI_OFFSET + 0x0C00)
#define GICR_ICFGR1 (GICR_SGI_OFFSET + 0x0C04)
#define GICR_IGRPMODR0 (GICR_SGI_OFFSET + 0x0D00)
#define GICR_NSACR (GICR_SGI_OFFSET + 0x0E00)
#define GICR_CTLR_ENABLE_LPIS (1U << 0)
#define GICR_CTLR_RWP (1U << 3)
#define GICR_CTLR_DPG0 (1U << 24)
#define GICR_CTLR_DPG1NS (1U << 25)
#define GICR_CTLR_DPG1S (1U << 26)
#define GICR_CTLR_UWP (1U << 31)
#define GICR_TYPER_PLPIS (1U << 0)
#define GICR_TYPER_VLPIS (1U << 1)
#define GICR_TYPER_DIRECTLPI (1U << 3)
#define GICR_TYPER_LAST (1U << 4)
#define GICR_TYPER_DPGS (1U << 5)
#define GICR_TYPER_PROCNUM (0xFFFFU << 8)
#define GICR_TYPER_COMMONLPIAFF (0x3 << 24)
#define GICR_TYPER_AFFINITYVALUE (0xFFFFFFFFULL << 32)
#define GICR_WAKER_ProcessorSleep (1U << 1)
#define GICR_WAKER_ChildrenAsleep (1U << 2)
#define GICR_PROPBASER_OUTER_CACHEABILITY_MASK (7ULL << 56)
#define GICR_PROPBASER_ADDR_MASK (0xfffffffffULL << 12)
#define GICR_PROPBASER_SHAREABILITY_MASK (3U << 10)
#define GICR_PROPBASER_CACHEABILITY_MASK (7U << 7)
#define GICR_PROPBASER_IDBITS_MASK (0x1f)
#define GICR_PENDBASER_PTZ (1ULL << 62)
#define GICR_PENDBASER_OUTER_CACHEABILITY_MASK (7ULL << 56)
#define GICR_PENDBASER_ADDR_MASK (0xffffffffULL << 16)
#define GICR_PENDBASER_SHAREABILITY_MASK (3U << 10)
#define GICR_PENDBASER_CACHEABILITY_MASK (7U << 7)
#define ICC_CTLR_EL1_CBPR (1U << 0)
#define ICC_CTLR_EL1_EOIMODE (1U << 1)
#define ICC_CTLR_EL1_PMHE (1U << 6)
#define ICC_CTLR_EL1_PRIBITS_SHIFT 8
#define ICC_CTLR_EL1_IDBITS_SHIFT 11
#define ICC_CTLR_EL1_SEIS (1U << 14)
#define ICC_CTLR_EL1_A3V (1U << 15)
#define ICC_PMR_PRIORITY_MASK 0xff
#define ICC_BPR_BINARYPOINT_MASK 0x07
#define ICC_IGRPEN_ENABLE 0x01
#define ICC_CTLR_EL3_CBPR_EL1S (1U << 0)
#define ICC_CTLR_EL3_CBPR_EL1NS (1U << 1)
#define ICC_CTLR_EL3_EOIMODE_EL3 (1U << 2)
#define ICC_CTLR_EL3_EOIMODE_EL1S (1U << 3)
#define ICC_CTLR_EL3_EOIMODE_EL1NS (1U << 4)
#define ICC_CTLR_EL3_RM (1U << 5)
#define ICC_CTLR_EL3_PMHE (1U << 6)
#define ICC_CTLR_EL3_PRIBITS_SHIFT 8
#define ICC_CTLR_EL3_IDBITS_SHIFT 11
#define ICC_CTLR_EL3_SEIS (1U << 14)
#define ICC_CTLR_EL3_A3V (1U << 15)
#define ICC_CTLR_EL3_NDS (1U << 17)
/* Special interrupt IDs */
#define INTID_SECURE 1020
#define INTID_NONSECURE 1021
#define INTID_SPURIOUS 1023
/* Functions internal to the emulated GICv3 */
/**
* gicv3_redist_update:
* @cs: GICv3CPUState for this redistributor
*
* Recalculate the highest priority pending interrupt after a
* change to redistributor state, and inform the CPU accordingly.
*/
void gicv3_redist_update(GICv3CPUState *cs);
/**
* gicv3_update:
* @s: GICv3State
* @start: first interrupt whose state changed
* @len: length of the range of interrupts whose state changed
*
* Recalculate the highest priority pending interrupts after a
* change to the distributor state affecting @len interrupts
* starting at @start, and inform the CPUs accordingly.
*/
void gicv3_update(GICv3State *s, int start, int len);
/**
* gicv3_full_update_noirqset:
* @s: GICv3State
*
* Recalculate the cached information about highest priority
* pending interrupts, but don't inform the CPUs. This should be
* called after an incoming migration has loaded new state.
*/
void gicv3_full_update_noirqset(GICv3State *s);
/**
* gicv3_full_update:
* @s: GICv3State
*
* Recalculate the highest priority pending interrupts after
* a change that could affect the status of all interrupts,
* and inform the CPUs accordingly.
*/
void gicv3_full_update(GICv3State *s);
MemTxResult gicv3_dist_read(void *opaque, hwaddr offset, uint64_t *data,
unsigned size, MemTxAttrs attrs);
MemTxResult gicv3_dist_write(void *opaque, hwaddr addr, uint64_t data,
unsigned size, MemTxAttrs attrs);
MemTxResult gicv3_redist_read(void *opaque, hwaddr offset, uint64_t *data,
unsigned size, MemTxAttrs attrs);
MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data,
unsigned size, MemTxAttrs attrs);
void gicv3_dist_set_irq(GICv3State *s, int irq, int level);
void gicv3_redist_set_irq(GICv3CPUState *cs, int irq, int level);
void gicv3_redist_send_sgi(GICv3CPUState *cs, int grp, int irq, bool ns);
void gicv3_init_cpuif(GICv3State *s);
/**
* gicv3_cpuif_update:
* @cs: GICv3CPUState for the CPU to update
*
* Recalculate whether to assert the IRQ or FIQ lines after a change
* to the current highest priority pending interrupt, the CPU's
* current running priority or the CPU's current exception level or
* security state.
*/
void gicv3_cpuif_update(GICv3CPUState *cs);
static inline uint32_t gicv3_iidr(void)
{
/* Return the Implementer Identification Register value
* for the emulated GICv3, as reported in GICD_IIDR and GICR_IIDR.
*
* We claim to be an ARM r0p0 with a zero ProductID.
* This is the same as an r0p0 GIC-500.
*/
return 0x43b;
}
static inline uint32_t gicv3_idreg(int regoffset)
{
/* Return the value of the CoreSight ID register at the specified
* offset from the first ID register (as found in the distributor
* and redistributor register banks).
* These values indicate an ARM implementation of a GICv3.
*/
static const uint8_t gicd_ids[] = {
0x44, 0x00, 0x00, 0x00, 0x92, 0xB4, 0x3B, 0x00, 0x0D, 0xF0, 0x05, 0xB1
};
return gicd_ids[regoffset / 4];
}
/**
* gicv3_irq_group:
*
* Return the group which this interrupt is configured as (GICV3_G0,
* GICV3_G1 or GICV3_G1NS).
*/
static inline int gicv3_irq_group(GICv3State *s, GICv3CPUState *cs, int irq)
{
bool grpbit, grpmodbit;
if (irq < GIC_INTERNAL) {
grpbit = extract32(cs->gicr_igroupr0, irq, 1);
grpmodbit = extract32(cs->gicr_igrpmodr0, irq, 1);
} else {
grpbit = gicv3_gicd_group_test(s, irq);
grpmodbit = gicv3_gicd_grpmod_test(s, irq);
}
if (grpbit) {
return GICV3_G1NS;
}
if (s->gicd_ctlr & GICD_CTLR_DS) {
return GICV3_G0;
}
return grpmodbit ? GICV3_G1 : GICV3_G0;
}
/**
* gicv3_redist_affid:
*
* Return the 32-bit affinity ID of the CPU connected to this redistributor
*/
static inline uint32_t gicv3_redist_affid(GICv3CPUState *cs)
{
return cs->gicr_typer >> 32;
}
/**
* gicv3_cache_target_cpustate:
*
* Update the cached CPU state corresponding to the target for this interrupt
* (which is kept in s->gicd_irouter_target[]).
*/
static inline void gicv3_cache_target_cpustate(GICv3State *s, int irq)
{
GICv3CPUState *cs = NULL;
int i;
uint32_t tgtaff = extract64(s->gicd_irouter[irq], 0, 24) |
extract64(s->gicd_irouter[irq], 32, 8) << 24;
for (i = 0; i < s->num_cpu; i++) {
if (s->cpu[i].gicr_typer >> 32 == tgtaff) {
cs = &s->cpu[i];
break;
}
}
s->gicd_irouter_target[irq] = cs;
}
/**
* gicv3_cache_all_target_cpustates:
*
* Populate the entire cache of CPU state pointers for interrupt targets
* (eg after inbound migration or CPU reset)
*/
static inline void gicv3_cache_all_target_cpustates(GICv3State *s)
{
int irq;
for (irq = GIC_INTERNAL; irq < GICV3_MAXIRQ; irq++) {
gicv3_cache_target_cpustate(s, irq);
}
}
#endif /* !QEMU_ARM_GIC_INTERNAL_H */
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