From patchwork Wed May 2 17:12:12 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 8365 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id B9FA623E37 for ; Wed, 2 May 2012 17:12:39 +0000 (UTC) Received: from mail-yw0-f52.google.com (mail-yw0-f52.google.com [209.85.213.52]) by fiordland.canonical.com (Postfix) with ESMTP id 74290A1841B for ; Wed, 2 May 2012 17:12:39 +0000 (UTC) Received: by mail-yw0-f52.google.com with SMTP id p61so1132622yhp.11 for ; Wed, 02 May 2012 10:12:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=AByb09MVHenep7iblJM1BUaLXLottkDjDwdWsGNVyYk=; b=LeRqPXdsUmR7HyUPg0fqxL7MWFbygtmFOL0wT3dAuQ4UPkIsG87uhHXzM8slyf1gUp o+Clg4Jl3LEYR7LHLuXTFmHS8eWUBkrehybMK3JTnDMQguMWIj5nbB9hw3KWg+IXXeSL 7zWtT9z88pnaSgS6MXSzFVW6GejhU5do5efTXJeXejy7Q2TePr0R1s+Kj0QHltoNU7eI r/4DS+U7jgjLDLjgsY7Y+K6EUP11dUkB+AAQiGz1oY06dNhyEOfEl1IrzIBL+T150dBg PRBAS1kgf889z3o76l3ClHCJ78HgXsFbf0QvyhcgE/IPTYLHOe1m65IRW6es0K4hOe+e U/9A== Received: by 10.50.181.164 with SMTP id dx4mr6051273igc.1.1335978758878; Wed, 02 May 2012 10:12:38 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.231.137.198 with SMTP id x6csp267531ibt; Wed, 2 May 2012 10:12:37 -0700 (PDT) Received: by 10.180.101.136 with SMTP id fg8mr16071542wib.4.1335978757349; Wed, 02 May 2012 10:12:37 -0700 (PDT) Received: from mnementh.archaic.org.uk (mnementh.archaic.org.uk. [81.2.115.146]) by mx.google.com with ESMTPS id r7si3096234wiz.13.2012.05.02.10.12.36 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 02 May 2012 10:12:37 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of pm215@archaic.org.uk designates 81.2.115.146 as permitted sender) client-ip=81.2.115.146; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of pm215@archaic.org.uk designates 81.2.115.146 as permitted sender) smtp.mail=pm215@archaic.org.uk Received: from pm215 by mnementh.archaic.org.uk with local (Exim 4.72) (envelope-from ) id 1SPd65-0008Tu-Mv; Wed, 02 May 2012 18:12:13 +0100 From: Peter Maydell To: qemu-devel@nongnu.org Cc: patches@linaro.org, Paul Brook , =?UTF-8?q?Andreas=20F=C3=A4rber?= Subject: [PATCH 9/9] hw/armv7m_nvic: Make the NVIC a freestanding class Date: Wed, 2 May 2012 18:12:12 +0100 Message-Id: <1335978732-32559-10-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1335978732-32559-1-git-send-email-peter.maydell@linaro.org> References: <1335978732-32559-1-git-send-email-peter.maydell@linaro.org> X-Gm-Message-State: ALoCoQmeV8wneaTMHwIy6OghqsVccTyLuiWFxSpgcL8tOMNHFZ+qsEIBIjs1xzmJ23jfChfM5iq/ Rearrange the GIC and NVIC so both are straightforward subclasses of a common class, rather than having the NVIC source file textually include arm_gic.c. Signed-off-by: Peter Maydell --- Makefile.target | 2 +- hw/arm_gic.c | 241 +++---------------------------------------------- hw/arm_gic_common.c | 184 +++++++++++++++++++++++++++++++++++++ hw/arm_gic_internal.h | 136 ++++++++++++++++++++++++++++ hw/armv7m_nvic.c | 48 ++++++++--- 5 files changed, 371 insertions(+), 240 deletions(-) create mode 100644 hw/arm_gic_common.c create mode 100644 hw/arm_gic_internal.h diff --git a/Makefile.target b/Makefile.target index 1582904..49b92f1 100644 --- a/Makefile.target +++ b/Makefile.target @@ -335,7 +335,7 @@ obj-arm-y += cadence_uart.o obj-arm-y += cadence_ttc.o obj-arm-y += cadence_gem.o obj-arm-y += xilinx_zynq.o zynq_slcr.o -obj-arm-y += arm_gic.o +obj-arm-y += arm_gic.o arm_gic_common.o obj-arm-y += realview_gic.o realview.o arm_sysctl.o arm11mpcore.o a9mpcore.o obj-arm-y += exynos4210_gic.o exynos4210_combiner.o exynos4210.o obj-arm-y += exynos4_boards.o exynos4210_uart.o exynos4210_pwm.o diff --git a/hw/arm_gic.c b/hw/arm_gic.c index ad5ab3c..ec22322 100644 --- a/hw/arm_gic.c +++ b/hw/arm_gic.c @@ -19,13 +19,7 @@ */ #include "sysbus.h" - -/* Maximum number of possible interrupts, determined by the GIC architecture */ -#define GIC_MAXIRQ 1020 -/* First 32 are private to each CPU (SGIs and PPIs). */ -#define GIC_INTERNAL 32 -/* Maximum number of possible CPU interfaces, determined by GIC architecture */ -#define NCPU 8 +#include "arm_gic_internal.h" //#define DEBUG_GIC @@ -36,88 +30,12 @@ do { printf("arm_gic: " fmt , ## __VA_ARGS__); } while (0) #define DPRINTF(fmt, ...) do {} while(0) #endif -/* The NVIC has 16 internal vectors. However these are not exposed - through the normal GIC interface. */ -#define GIC_BASE_IRQ ((s->revision == REV_NVIC) ? 32 : 0) - static const uint8_t gic_id[] = { 0x90, 0x13, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; -#define FROM_SYSBUSGIC(type, dev) \ - DO_UPCAST(type, gic, FROM_SYSBUS(gic_state, dev)) - -typedef struct gic_irq_state -{ - /* The enable bits are only banked for per-cpu interrupts. */ - unsigned enabled:NCPU; - unsigned pending:NCPU; - unsigned active:NCPU; - unsigned level:NCPU; - unsigned model:1; /* 0 = N:N, 1 = 1:N */ - unsigned trigger:1; /* nonzero = edge triggered. */ -} gic_irq_state; - -#define ALL_CPU_MASK ((unsigned)(((1 << NCPU) - 1))) #define NUM_CPU(s) ((s)->num_cpu) -#define GIC_SET_ENABLED(irq, cm) s->irq_state[irq].enabled |= (cm) -#define GIC_CLEAR_ENABLED(irq, cm) s->irq_state[irq].enabled &= ~(cm) -#define GIC_TEST_ENABLED(irq, cm) ((s->irq_state[irq].enabled & (cm)) != 0) -#define GIC_SET_PENDING(irq, cm) s->irq_state[irq].pending |= (cm) -#define GIC_CLEAR_PENDING(irq, cm) s->irq_state[irq].pending &= ~(cm) -#define GIC_TEST_PENDING(irq, cm) ((s->irq_state[irq].pending & (cm)) != 0) -#define GIC_SET_ACTIVE(irq, cm) s->irq_state[irq].active |= (cm) -#define GIC_CLEAR_ACTIVE(irq, cm) s->irq_state[irq].active &= ~(cm) -#define GIC_TEST_ACTIVE(irq, cm) ((s->irq_state[irq].active & (cm)) != 0) -#define GIC_SET_MODEL(irq) s->irq_state[irq].model = 1 -#define GIC_CLEAR_MODEL(irq) s->irq_state[irq].model = 0 -#define GIC_TEST_MODEL(irq) s->irq_state[irq].model -#define GIC_SET_LEVEL(irq, cm) s->irq_state[irq].level = (cm) -#define GIC_CLEAR_LEVEL(irq, cm) s->irq_state[irq].level &= ~(cm) -#define GIC_TEST_LEVEL(irq, cm) ((s->irq_state[irq].level & (cm)) != 0) -#define GIC_SET_TRIGGER(irq) s->irq_state[irq].trigger = 1 -#define GIC_CLEAR_TRIGGER(irq) s->irq_state[irq].trigger = 0 -#define GIC_TEST_TRIGGER(irq) s->irq_state[irq].trigger -#define GIC_GET_PRIORITY(irq, cpu) (((irq) < GIC_INTERNAL) ? \ - s->priority1[irq][cpu] : \ - s->priority2[(irq) - GIC_INTERNAL]) -#define GIC_TARGET(irq) s->irq_target[irq] - -typedef struct gic_state -{ - SysBusDevice busdev; - qemu_irq parent_irq[NCPU]; - int enabled; - int cpu_enabled[NCPU]; - - gic_irq_state irq_state[GIC_MAXIRQ]; - int irq_target[GIC_MAXIRQ]; - int priority1[GIC_INTERNAL][NCPU]; - int priority2[GIC_MAXIRQ - GIC_INTERNAL]; - int last_active[GIC_MAXIRQ][NCPU]; - - int priority_mask[NCPU]; - int running_irq[NCPU]; - int running_priority[NCPU]; - int current_pending[NCPU]; - - uint32_t num_cpu; - - MemoryRegion iomem; /* Distributor */ - /* This is just so we can have an opaque pointer which identifies - * both this GIC and which CPU interface we should be accessing. - */ - struct gic_state *backref[NCPU]; - MemoryRegion cpuiomem[NCPU+1]; /* CPU interfaces */ - uint32_t num_irq; - uint32_t revision; -} gic_state; - -/* The special cases for the revision property: */ -#define REV_11MPCORE 0 -#define REV_NVIC 0xffffffff - static inline int gic_get_current_cpu(gic_state *s) { if (s->num_cpu > 1) { @@ -128,7 +46,7 @@ static inline int gic_get_current_cpu(gic_state *s) /* TODO: Many places that call this routine could be optimized. */ /* Update interrupt status after enabled or pending bits have been changed. */ -static void gic_update(gic_state *s) +void gic_update(gic_state *s) { int best_irq; int best_prio; @@ -166,8 +84,7 @@ static void gic_update(gic_state *s) } } -#ifdef NVIC -static void gic_set_pending_private(gic_state *s, int cpu, int irq) +void gic_set_pending_private(gic_state *s, int cpu, int irq) { int cm = 1 << cpu; @@ -178,7 +95,6 @@ static void gic_set_pending_private(gic_state *s, int cpu, int irq) GIC_SET_PENDING(irq, cm); gic_update(s); } -#endif /* Process a change in an external IRQ input. */ static void gic_set_irq(void *opaque, int irq, int level) @@ -232,7 +148,7 @@ static void gic_set_running_irq(gic_state *s, int cpu, int irq) gic_update(s); } -static uint32_t gic_acknowledge_irq(gic_state *s, int cpu) +uint32_t gic_acknowledge_irq(gic_state *s, int cpu) { int new_irq; int cm = 1 << cpu; @@ -251,7 +167,7 @@ static uint32_t gic_acknowledge_irq(gic_state *s, int cpu) return new_irq; } -static void gic_complete_irq(gic_state * s, int cpu, int irq) +void gic_complete_irq(gic_state *s, int cpu, int irq) { int update = 0; int cm = 1 << cpu; @@ -623,7 +539,6 @@ static const MemoryRegionOps gic_dist_ops = { .endianness = DEVICE_NATIVE_ENDIAN, }; -#ifndef NVIC static uint32_t gic_cpu_read(gic_state *s, int cpu, int offset) { switch (offset) { @@ -715,124 +630,10 @@ static const MemoryRegionOps gic_cpu_ops = { .write = gic_do_cpu_write, .endianness = DEVICE_NATIVE_ENDIAN, }; -#endif -static void gic_reset(DeviceState *dev) +void gic_init_irqs_and_distributor(gic_state *s, int num_irq) { - gic_state *s = FROM_SYSBUS(gic_state, sysbus_from_qdev(dev)); - int i; - memset(s->irq_state, 0, GIC_MAXIRQ * sizeof(gic_irq_state)); - for (i = 0 ; i < NUM_CPU(s); i++) { - s->priority_mask[i] = 0xf0; - s->current_pending[i] = 1023; - s->running_irq[i] = 1023; - s->running_priority[i] = 0x100; - s->cpu_enabled[i] = 0; - } - for (i = 0; i < 16; i++) { - GIC_SET_ENABLED(i, ALL_CPU_MASK); - GIC_SET_TRIGGER(i); - } - if (s->num_cpu == 1) { - /* For uniprocessor GICs all interrupts always target the sole CPU */ - for (i = 0; i < GIC_MAXIRQ; i++) { - s->irq_target[i] = 1; - } - } - s->enabled = 0; -} - -static void gic_save(QEMUFile *f, void *opaque) -{ - gic_state *s = (gic_state *)opaque; - int i; - int j; - - qemu_put_be32(f, s->enabled); - for (i = 0; i < NUM_CPU(s); i++) { - qemu_put_be32(f, s->cpu_enabled[i]); - for (j = 0; j < GIC_INTERNAL; j++) - qemu_put_be32(f, s->priority1[j][i]); - for (j = 0; j < s->num_irq; j++) - qemu_put_be32(f, s->last_active[j][i]); - qemu_put_be32(f, s->priority_mask[i]); - qemu_put_be32(f, s->running_irq[i]); - qemu_put_be32(f, s->running_priority[i]); - qemu_put_be32(f, s->current_pending[i]); - } - for (i = 0; i < s->num_irq - GIC_INTERNAL; i++) { - qemu_put_be32(f, s->priority2[i]); - } - for (i = 0; i < s->num_irq; i++) { - qemu_put_be32(f, s->irq_target[i]); - qemu_put_byte(f, s->irq_state[i].enabled); - qemu_put_byte(f, s->irq_state[i].pending); - qemu_put_byte(f, s->irq_state[i].active); - qemu_put_byte(f, s->irq_state[i].level); - qemu_put_byte(f, s->irq_state[i].model); - qemu_put_byte(f, s->irq_state[i].trigger); - } -} - -static int gic_load(QEMUFile *f, void *opaque, int version_id) -{ - gic_state *s = (gic_state *)opaque; int i; - int j; - - if (version_id != 3) { - return -EINVAL; - } - - s->enabled = qemu_get_be32(f); - for (i = 0; i < NUM_CPU(s); i++) { - s->cpu_enabled[i] = qemu_get_be32(f); - for (j = 0; j < GIC_INTERNAL; j++) - s->priority1[j][i] = qemu_get_be32(f); - for (j = 0; j < s->num_irq; j++) - s->last_active[j][i] = qemu_get_be32(f); - s->priority_mask[i] = qemu_get_be32(f); - s->running_irq[i] = qemu_get_be32(f); - s->running_priority[i] = qemu_get_be32(f); - s->current_pending[i] = qemu_get_be32(f); - } - for (i = 0; i < s->num_irq - GIC_INTERNAL; i++) { - s->priority2[i] = qemu_get_be32(f); - } - for (i = 0; i < s->num_irq; i++) { - s->irq_target[i] = qemu_get_be32(f); - s->irq_state[i].enabled = qemu_get_byte(f); - s->irq_state[i].pending = qemu_get_byte(f); - s->irq_state[i].active = qemu_get_byte(f); - s->irq_state[i].level = qemu_get_byte(f); - s->irq_state[i].model = qemu_get_byte(f); - s->irq_state[i].trigger = qemu_get_byte(f); - } - - return 0; -} - -static void gic_init_irqs_and_distributor(gic_state *s, int num_irq) -{ - int i; - - if (s->num_cpu > NCPU) { - hw_error("requested %u CPUs exceeds GIC maximum %d\n", - s->num_cpu, NCPU); - } - s->num_irq = num_irq + GIC_BASE_IRQ; - if (s->num_irq > GIC_MAXIRQ) { - hw_error("requested %u interrupt lines exceeds GIC maximum %d\n", - num_irq, GIC_MAXIRQ); - } - /* ITLinesNumber is represented as (N / 32) - 1 (see - * gic_dist_readb) so this is an implementation imposed - * restriction, not an architectural one: - */ - if (s->num_irq < 32 || (s->num_irq % 32)) { - hw_error("%d interrupt lines unsupported: not divisible by 32\n", - num_irq); - } i = s->num_irq - GIC_INTERNAL; /* For the GIC, also expose incoming GPIO lines for PPIs for each CPU. @@ -850,17 +651,17 @@ static void gic_init_irqs_and_distributor(gic_state *s, int num_irq) sysbus_init_irq(&s->busdev, &s->parent_irq[i]); } memory_region_init_io(&s->iomem, &gic_dist_ops, s, "gic_dist", 0x1000); - - register_savevm(NULL, "arm_gic", -1, 3, gic_save, gic_load, s); } -#ifndef NVIC - static int arm_gic_init(SysBusDevice *dev) { /* Device instance init function for the GIC sysbus device */ int i; gic_state *s = FROM_SYSBUS(gic_state, dev); + ARMGICClass *agc = ARM_GIC_GET_CLASS(s); + + agc->parent_init(dev); + gic_init_irqs_and_distributor(s, s->num_irq); /* Memory regions for the CPU interfaces (NVIC doesn't have these): @@ -878,7 +679,6 @@ static int arm_gic_init(SysBusDevice *dev) memory_region_init_io(&s->cpuiomem[i+1], &gic_cpu_ops, &s->backref[i], "gic_cpu", 0x100); } - /* Distributor */ sysbus_init_mmio(dev, &s->iomem); /* cpu interfaces (one for "current cpu" plus one per cpu) */ @@ -888,30 +688,19 @@ static int arm_gic_init(SysBusDevice *dev) return 0; } -static Property arm_gic_properties[] = { - DEFINE_PROP_UINT32("num-cpu", gic_state, num_cpu, 1), - DEFINE_PROP_UINT32("num-irq", gic_state, num_irq, 32), - /* Revision can be 1 or 2 for GIC architecture specification - * versions 1 or 2, or 0 to indicate the legacy 11MPCore GIC. - * (Internally, 0xffffffff also indicates "not a GIC but an NVIC".) - */ - DEFINE_PROP_UINT32("revision", gic_state, revision, 1), - DEFINE_PROP_END_OF_LIST(), -}; - static void arm_gic_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass); + ARMGICClass *agc = ARM_GIC_CLASS(klass); + agc->parent_init = sbc->init; sbc->init = arm_gic_init; - dc->props = arm_gic_properties; - dc->reset = gic_reset; dc->no_user = 1; } static TypeInfo arm_gic_info = { - .name = "arm_gic", - .parent = TYPE_SYS_BUS_DEVICE, + .name = TYPE_ARM_GIC, + .parent = TYPE_ARM_GIC_COMMON, .instance_size = sizeof(gic_state), .class_init = arm_gic_class_init, }; @@ -922,5 +711,3 @@ static void arm_gic_register_types(void) } type_init(arm_gic_register_types) - -#endif diff --git a/hw/arm_gic_common.c b/hw/arm_gic_common.c new file mode 100644 index 0000000..360e782 --- /dev/null +++ b/hw/arm_gic_common.c @@ -0,0 +1,184 @@ +/* + * ARM GIC support - common bits of emulated and KVM kernel model + * + * Copyright (c) 2012 Linaro Limited + * Written by Peter Maydell + * + * 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 . + */ + +#include "arm_gic_internal.h" + +static void gic_save(QEMUFile *f, void *opaque) +{ + gic_state *s = (gic_state *)opaque; + int i; + int j; + + qemu_put_be32(f, s->enabled); + for (i = 0; i < s->num_cpu; i++) { + qemu_put_be32(f, s->cpu_enabled[i]); + for (j = 0; j < GIC_INTERNAL; j++) { + qemu_put_be32(f, s->priority1[j][i]); + } + for (j = 0; j < s->num_irq; j++) { + qemu_put_be32(f, s->last_active[j][i]); + } + qemu_put_be32(f, s->priority_mask[i]); + qemu_put_be32(f, s->running_irq[i]); + qemu_put_be32(f, s->running_priority[i]); + qemu_put_be32(f, s->current_pending[i]); + } + for (i = 0; i < s->num_irq - GIC_INTERNAL; i++) { + qemu_put_be32(f, s->priority2[i]); + } + for (i = 0; i < s->num_irq; i++) { + qemu_put_be32(f, s->irq_target[i]); + qemu_put_byte(f, s->irq_state[i].enabled); + qemu_put_byte(f, s->irq_state[i].pending); + qemu_put_byte(f, s->irq_state[i].active); + qemu_put_byte(f, s->irq_state[i].level); + qemu_put_byte(f, s->irq_state[i].model); + qemu_put_byte(f, s->irq_state[i].trigger); + } +} + +static int gic_load(QEMUFile *f, void *opaque, int version_id) +{ + gic_state *s = (gic_state *)opaque; + int i; + int j; + + if (version_id != 3) { + return -EINVAL; + } + + s->enabled = qemu_get_be32(f); + for (i = 0; i < s->num_cpu; i++) { + s->cpu_enabled[i] = qemu_get_be32(f); + for (j = 0; j < GIC_INTERNAL; j++) { + s->priority1[j][i] = qemu_get_be32(f); + } + for (j = 0; j < s->num_irq; j++) { + s->last_active[j][i] = qemu_get_be32(f); + } + s->priority_mask[i] = qemu_get_be32(f); + s->running_irq[i] = qemu_get_be32(f); + s->running_priority[i] = qemu_get_be32(f); + s->current_pending[i] = qemu_get_be32(f); + } + for (i = 0; i < s->num_irq - GIC_INTERNAL; i++) { + s->priority2[i] = qemu_get_be32(f); + } + for (i = 0; i < s->num_irq; i++) { + s->irq_target[i] = qemu_get_be32(f); + s->irq_state[i].enabled = qemu_get_byte(f); + s->irq_state[i].pending = qemu_get_byte(f); + s->irq_state[i].active = qemu_get_byte(f); + s->irq_state[i].level = qemu_get_byte(f); + s->irq_state[i].model = qemu_get_byte(f); + s->irq_state[i].trigger = qemu_get_byte(f); + } + + return 0; +} + +static int arm_gic_common_init(SysBusDevice *dev) +{ + gic_state *s = FROM_SYSBUS(gic_state, dev); + int num_irq = s->num_irq; + + if (s->num_cpu > NCPU) { + hw_error("requested %u CPUs exceeds GIC maximum %d\n", + s->num_cpu, NCPU); + } + s->num_irq += GIC_BASE_IRQ; + if (s->num_irq > GIC_MAXIRQ) { + hw_error("requested %u interrupt lines exceeds GIC maximum %d\n", + num_irq, GIC_MAXIRQ); + } + /* ITLinesNumber is represented as (N / 32) - 1 (see + * gic_dist_readb) so this is an implementation imposed + * restriction, not an architectural one: + */ + if (s->num_irq < 32 || (s->num_irq % 32)) { + hw_error("%d interrupt lines unsupported: not divisible by 32\n", + num_irq); + } + + register_savevm(NULL, "arm_gic", -1, 3, gic_save, gic_load, s); + return 0; +} + +static void arm_gic_common_reset(DeviceState *dev) +{ + gic_state *s = FROM_SYSBUS(gic_state, sysbus_from_qdev(dev)); + int i; + memset(s->irq_state, 0, GIC_MAXIRQ * sizeof(gic_irq_state)); + for (i = 0 ; i < s->num_cpu; i++) { + s->priority_mask[i] = 0xf0; + s->current_pending[i] = 1023; + s->running_irq[i] = 1023; + s->running_priority[i] = 0x100; + s->cpu_enabled[i] = 0; + } + for (i = 0; i < 16; i++) { + GIC_SET_ENABLED(i, ALL_CPU_MASK); + GIC_SET_TRIGGER(i); + } + if (s->num_cpu == 1) { + /* For uniprocessor GICs all interrupts always target the sole CPU */ + for (i = 0; i < GIC_MAXIRQ; i++) { + s->irq_target[i] = 1; + } + } + s->enabled = 0; +} + +static Property arm_gic_common_properties[] = { + DEFINE_PROP_UINT32("num-cpu", gic_state, num_cpu, 1), + DEFINE_PROP_UINT32("num-irq", gic_state, num_irq, 32), + /* Revision can be 1 or 2 for GIC architecture specification + * versions 1 or 2, or 0 to indicate the legacy 11MPCore GIC. + * (Internally, 0xffffffff also indicates "not a GIC but an NVIC".) + */ + DEFINE_PROP_UINT32("revision", gic_state, revision, 1), + DEFINE_PROP_END_OF_LIST(), +}; + +static void arm_gic_common_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *sc = SYS_BUS_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + dc->reset = arm_gic_common_reset; + dc->props = arm_gic_common_properties; + dc->no_user = 1; + sc->init = arm_gic_common_init; +} + +static TypeInfo arm_gic_common_type = { + .name = TYPE_ARM_GIC_COMMON, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(gic_state), + .class_size = sizeof(ARMGICCommonClass), + .class_init = arm_gic_common_class_init, + .abstract = true, +}; + +static void register_types(void) +{ + type_register_static(&arm_gic_common_type); +} + +type_init(register_types) diff --git a/hw/arm_gic_internal.h b/hw/arm_gic_internal.h new file mode 100644 index 0000000..db4fad5 --- /dev/null +++ b/hw/arm_gic_internal.h @@ -0,0 +1,136 @@ +/* + * ARM GIC support - internal interfaces + * + * Copyright (c) 2012 Linaro Limited + * Written by Peter Maydell + * + * 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 . + */ + +#ifndef QEMU_ARM_GIC_INTERNAL_H +#define QEMU_ARM_GIC_INTERNAL_H + +#include "sysbus.h" + +/* Maximum number of possible interrupts, determined by the GIC architecture */ +#define GIC_MAXIRQ 1020 +/* First 32 are private to each CPU (SGIs and PPIs). */ +#define GIC_INTERNAL 32 +/* Maximum number of possible CPU interfaces, determined by GIC architecture */ +#define NCPU 8 + +#define ALL_CPU_MASK ((unsigned)(((1 << NCPU) - 1))) + +/* The NVIC has 16 internal vectors. However these are not exposed + through the normal GIC interface. */ +#define GIC_BASE_IRQ ((s->revision == REV_NVIC) ? 32 : 0) + +#define GIC_SET_ENABLED(irq, cm) s->irq_state[irq].enabled |= (cm) +#define GIC_CLEAR_ENABLED(irq, cm) s->irq_state[irq].enabled &= ~(cm) +#define GIC_TEST_ENABLED(irq, cm) ((s->irq_state[irq].enabled & (cm)) != 0) +#define GIC_SET_PENDING(irq, cm) s->irq_state[irq].pending |= (cm) +#define GIC_CLEAR_PENDING(irq, cm) s->irq_state[irq].pending &= ~(cm) +#define GIC_TEST_PENDING(irq, cm) ((s->irq_state[irq].pending & (cm)) != 0) +#define GIC_SET_ACTIVE(irq, cm) s->irq_state[irq].active |= (cm) +#define GIC_CLEAR_ACTIVE(irq, cm) s->irq_state[irq].active &= ~(cm) +#define GIC_TEST_ACTIVE(irq, cm) ((s->irq_state[irq].active & (cm)) != 0) +#define GIC_SET_MODEL(irq) s->irq_state[irq].model = 1 +#define GIC_CLEAR_MODEL(irq) s->irq_state[irq].model = 0 +#define GIC_TEST_MODEL(irq) s->irq_state[irq].model +#define GIC_SET_LEVEL(irq, cm) s->irq_state[irq].level = (cm) +#define GIC_CLEAR_LEVEL(irq, cm) s->irq_state[irq].level &= ~(cm) +#define GIC_TEST_LEVEL(irq, cm) ((s->irq_state[irq].level & (cm)) != 0) +#define GIC_SET_TRIGGER(irq) s->irq_state[irq].trigger = 1 +#define GIC_CLEAR_TRIGGER(irq) s->irq_state[irq].trigger = 0 +#define GIC_TEST_TRIGGER(irq) s->irq_state[irq].trigger +#define GIC_GET_PRIORITY(irq, cpu) (((irq) < GIC_INTERNAL) ? \ + s->priority1[irq][cpu] : \ + s->priority2[(irq) - GIC_INTERNAL]) +#define GIC_TARGET(irq) s->irq_target[irq] + +typedef struct gic_irq_state { + /* The enable bits are only banked for per-cpu interrupts. */ + unsigned enabled:NCPU; + unsigned pending:NCPU; + unsigned active:NCPU; + unsigned level:NCPU; + unsigned model:1; /* 0 = N:N, 1 = 1:N */ + unsigned trigger:1; /* nonzero = edge triggered. */ +} gic_irq_state; + +typedef struct gic_state { + SysBusDevice busdev; + qemu_irq parent_irq[NCPU]; + int enabled; + int cpu_enabled[NCPU]; + + gic_irq_state irq_state[GIC_MAXIRQ]; + int irq_target[GIC_MAXIRQ]; + int priority1[GIC_INTERNAL][NCPU]; + int priority2[GIC_MAXIRQ - GIC_INTERNAL]; + int last_active[GIC_MAXIRQ][NCPU]; + + int priority_mask[NCPU]; + int running_irq[NCPU]; + int running_priority[NCPU]; + int current_pending[NCPU]; + + uint32_t num_cpu; + + MemoryRegion iomem; /* Distributor */ + /* This is just so we can have an opaque pointer which identifies + * both this GIC and which CPU interface we should be accessing. + */ + struct gic_state *backref[NCPU]; + MemoryRegion cpuiomem[NCPU+1]; /* CPU interfaces */ + uint32_t num_irq; + uint32_t revision; +} gic_state; + +/* The special cases for the revision property: */ +#define REV_11MPCORE 0 +#define REV_NVIC 0xffffffff + +void gic_set_pending_private(gic_state *s, int cpu, int irq); +uint32_t gic_acknowledge_irq(gic_state *s, int cpu); +void gic_complete_irq(gic_state *s, int cpu, int irq); +void gic_update(gic_state *s); +void gic_init_irqs_and_distributor(gic_state *s, int num_irq); + +#define TYPE_ARM_GIC_COMMON "arm_gic_common" +#define ARM_GIC_COMMON(obj) \ + OBJECT_CHECK(gic_state, (obj), TYPE_ARM_GIC_COMMON) +#define ARM_GIC_COMMON_CLASS(klass) \ + OBJECT_CLASS_CHECK(ARMGICCommonClass, (klass), TYPE_ARM_GIC_COMMON) +#define ARM_GIC_COMMON_GET_CLASS(obj) \ + OBJECT_GET_CLASS(ARMGICCommonClass, (obj), TYPE_ARM_GIC_COMMON) + +typedef struct ARMGICCommonClass { + SysBusDeviceClass parent_class; +} ARMGICCommonClass; + +#define TYPE_ARM_GIC "arm_gic" +#define ARM_GIC(obj) \ + OBJECT_CHECK(gic_state, (obj), TYPE_ARM_GIC) +#define ARM_GIC_CLASS(klass) \ + OBJECT_CLASS_CHECK(ARMGICClass, (klass), TYPE_ARM_GIC) +#define ARM_GIC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(ARMGICClass, (obj), TYPE_ARM_GIC) + +typedef struct ARMGICClass { + ARMGICCommonClass parent_class; + int (*parent_init)(SysBusDevice *dev); +} ARMGICClass; + +#endif /* !QEMU_ARM_GIC_INTERNAL_H */ diff --git a/hw/armv7m_nvic.c b/hw/armv7m_nvic.c index 031a7fd..4867c1d 100644 --- a/hw/armv7m_nvic.c +++ b/hw/armv7m_nvic.c @@ -14,13 +14,7 @@ #include "qemu-timer.h" #include "arm-misc.h" #include "exec-memory.h" - -#define NVIC 1 - -static uint32_t nvic_readl(void *opaque, uint32_t offset); -static void nvic_writel(void *opaque, uint32_t offset, uint32_t value); - -#include "arm_gic.c" +#include "arm_gic_internal.h" typedef struct { gic_state gic; @@ -36,6 +30,28 @@ typedef struct { uint32_t num_irq; } nvic_state; +#define TYPE_NVIC "armv7m_nvic" +/** + * NVICClass: + * @parent_reset: the parent class' reset handler. + * + * A model of the v7M NVIC and System Controller + */ +typedef struct NVICClass { + /*< private >*/ + ARMGICClass parent_class; + /*< public >*/ + int (*parent_init)(SysBusDevice *dev); + void (*parent_reset)(DeviceState *dev); +} NVICClass; + +#define NVIC_CLASS(klass) \ + OBJECT_CLASS_CHECK(NVICClass, (klass), TYPE_NVIC) +#define NVIC_GET_CLASS(obj) \ + OBJECT_GET_CLASS(NVICClass, (obj), TYPE_NVIC) +#define NVIC(obj) \ + OBJECT_CHECK(nvic_state, (obj), TYPE_NVIC) + static const uint8_t nvic_id[] = { 0x00, 0xb0, 0x1b, 0x00, 0x0d, 0xe0, 0x05, 0xb1 }; @@ -429,8 +445,9 @@ static const VMStateDescription vmstate_nvic = { static void armv7m_nvic_reset(DeviceState *dev) { - nvic_state *s = FROM_SYSBUSGIC(nvic_state, sysbus_from_qdev(dev)); - gic_reset(&s->gic.busdev.qdev); + nvic_state *s = NVIC(dev); + NVICClass *nc = NVIC_GET_CLASS(s); + nc->parent_reset(dev); /* Common GIC reset resets to disabled; the NVIC doesn't have * per-CPU interfaces so mark our non-existent CPU interface * as enabled by default. @@ -443,12 +460,15 @@ static void armv7m_nvic_reset(DeviceState *dev) static int armv7m_nvic_init(SysBusDevice *dev) { - nvic_state *s= FROM_SYSBUSGIC(nvic_state, dev); + nvic_state *s = NVIC(dev); + NVICClass *nc = NVIC_GET_CLASS(s); /* The NVIC always has only one CPU */ s->gic.num_cpu = 1; /* Tell the common code we're an NVIC */ s->gic.revision = 0xffffffff; + s->gic.num_irq = s->num_irq; + nc->parent_init(dev); gic_init_irqs_and_distributor(&s->gic, s->num_irq); /* The NVIC and system controller register area looks like this: * 0..0xff : system control registers, including systick @@ -489,9 +509,12 @@ static Property armv7m_nvic_properties[] = { static void armv7m_nvic_class_init(ObjectClass *klass, void *data) { + NVICClass *nc = NVIC_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass); SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass); + nc->parent_reset = dc->reset; + nc->parent_init = sdc->init; sdc->init = armv7m_nvic_init; dc->vmsd = &vmstate_nvic; dc->reset = armv7m_nvic_reset; @@ -499,10 +522,11 @@ static void armv7m_nvic_class_init(ObjectClass *klass, void *data) } static TypeInfo armv7m_nvic_info = { - .name = "armv7m_nvic", - .parent = TYPE_SYS_BUS_DEVICE, + .name = TYPE_NVIC, + .parent = TYPE_ARM_GIC_COMMON, .instance_size = sizeof(nvic_state), .class_init = armv7m_nvic_class_init, + .class_size = sizeof(NVICClass), }; static void armv7m_nvic_register_types(void)