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OpenRISC SMP patchset 20171021

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Merge remote-tracking branch 'remotes/shorne/tags/openrisc-20171021-smp-pr' into staging

OpenRISC SMP patchset 20171021

# gpg: Signature made Fri 20 Oct 2017 22:51:16 BST
# gpg:                using RSA key 0xC3B31C2D5E6627E4
# gpg: Good signature from "Stafford Horne <shorne@gmail.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D9C4 7354 AEF8 6C10 3A25  EFF1 C3B3 1C2D 5E66 27E4

* remotes/shorne/tags/openrisc-20171021-smp-pr:
  openrisc: Only kick cpu on timeout, not on update
  openrisc: Initial SMP support
  openrisc/cputimer: Perparation for Multicore
  target/openrisc: Make coreid and numcores variable
  openrisc/ompic: Add OpenRISC Multicore PIC (OMPIC)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-10-24 10:50:49 +01:00
commit a61837da0f
9 changed files with 303 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
default-configs/or1k-softmmu.mak
View File

@ -2,3 +2,4 @@
CONFIG_SERIAL=y
CONFIG_OPENCORES_ETH=y
CONFIG_OMPIC=y

1
hw/intc/Makefile.objs
View File

@ -43,3 +43,4 @@ obj-$(CONFIG_ASPEED_SOC) += aspeed_vic.o
obj-$(CONFIG_ARM_GIC) += arm_gicv3_cpuif.o
obj-$(CONFIG_MIPS_CPS) += mips_gic.o
obj-$(CONFIG_NIOS2) += nios2_iic.o
obj-$(CONFIG_OMPIC) += ompic.o

179
hw/intc/ompic.c Normal file
View File

@ -0,0 +1,179 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Authors: Stafford Horne <shorne@gmail.com>
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/sysbus.h"
#include "exec/memory.h"
#define TYPE_OR1K_OMPIC "or1k-ompic"
#define OR1K_OMPIC(obj) OBJECT_CHECK(OR1KOMPICState, (obj), TYPE_OR1K_OMPIC)
#define OMPIC_CTRL_IRQ_ACK (1 << 31)
#define OMPIC_CTRL_IRQ_GEN (1 << 30)
#define OMPIC_CTRL_DST(cpu) (((cpu) >> 16) & 0x3fff)
#define OMPIC_REG(addr) (((addr) >> 2) & 0x1)
#define OMPIC_SRC_CPU(addr) (((addr) >> 3) & 0x4f)
#define OMPIC_DST_CPU(addr) (((addr) >> 3) & 0x4f)
#define OMPIC_STATUS_IRQ_PENDING (1 << 30)
#define OMPIC_STATUS_SRC(cpu) (((cpu) & 0x3fff) << 16)
#define OMPIC_STATUS_DATA(data) ((data) & 0xffff)
#define OMPIC_CONTROL 0
#define OMPIC_STATUS 1
#define OMPIC_MAX_CPUS 4 /* Real max is much higher, but dont waste memory */
#define OMPIC_ADDRSPACE_SZ (OMPIC_MAX_CPUS * 2 * 4) /* 2 32-bit regs per cpu */
typedef struct OR1KOMPICState OR1KOMPICState;
typedef struct OR1KOMPICCPUState OR1KOMPICCPUState;
struct OR1KOMPICCPUState {
qemu_irq irq;
uint32_t status;
uint32_t control;
};
struct OR1KOMPICState {
SysBusDevice parent_obj;
MemoryRegion mr;
OR1KOMPICCPUState cpus[OMPIC_MAX_CPUS];
uint32_t num_cpus;
};
static uint64_t ompic_read(void *opaque, hwaddr addr, unsigned size)
{
OR1KOMPICState *s = opaque;
int src_cpu = OMPIC_SRC_CPU(addr);
/* We can only write to control control, write control + update status */
if (OMPIC_REG(addr) == OMPIC_CONTROL) {
return s->cpus[src_cpu].control;
} else {
return s->cpus[src_cpu].status;
}
}
static void ompic_write(void *opaque, hwaddr addr, uint64_t data, unsigned size)
{
OR1KOMPICState *s = opaque;
/* We can only write to control control, write control + update status */
if (OMPIC_REG(addr) == OMPIC_CONTROL) {
int src_cpu = OMPIC_SRC_CPU(addr);
s->cpus[src_cpu].control = data;
if (data & OMPIC_CTRL_IRQ_GEN) {
int dst_cpu = OMPIC_CTRL_DST(data);
s->cpus[dst_cpu].status = OMPIC_STATUS_IRQ_PENDING |
OMPIC_STATUS_SRC(src_cpu) |
OMPIC_STATUS_DATA(data);
qemu_irq_raise(s->cpus[dst_cpu].irq);
}
if (data & OMPIC_CTRL_IRQ_ACK) {
s->cpus[src_cpu].status &= ~OMPIC_STATUS_IRQ_PENDING;
qemu_irq_lower(s->cpus[src_cpu].irq);
}
}
}
static const MemoryRegionOps ompic_ops = {
.read = ompic_read,
.write = ompic_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl = {
.max_access_size = 8,
},
};
static void or1k_ompic_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
OR1KOMPICState *s = OR1K_OMPIC(obj);
memory_region_init_io(&s->mr, OBJECT(s), &ompic_ops, s,
"or1k-ompic", OMPIC_ADDRSPACE_SZ);
sysbus_init_mmio(sbd, &s->mr);
}
static void or1k_ompic_realize(DeviceState *dev, Error **errp)
{
OR1KOMPICState *s = OR1K_OMPIC(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
int i;
if (s->num_cpus > OMPIC_MAX_CPUS) {
error_setg(errp, "Exceeded maximum CPUs %d", s->num_cpus);
return;
}
/* Init IRQ sources for all CPUs */
for (i = 0; i < s->num_cpus; i++) {
sysbus_init_irq(sbd, &s->cpus[i].irq);
}
}
static Property or1k_ompic_properties[] = {
DEFINE_PROP_UINT32("num-cpus", OR1KOMPICState, num_cpus, 1),
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription vmstate_or1k_ompic_cpu = {
.name = "or1k_ompic_cpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(status, OR1KOMPICCPUState),
VMSTATE_UINT32(control, OR1KOMPICCPUState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_or1k_ompic = {
.name = TYPE_OR1K_OMPIC,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT_ARRAY(cpus, OR1KOMPICState, OMPIC_MAX_CPUS, 1,
vmstate_or1k_ompic_cpu, OR1KOMPICCPUState),
VMSTATE_UINT32(num_cpus, OR1KOMPICState),
VMSTATE_END_OF_LIST()
}
};
static void or1k_ompic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->props = or1k_ompic_properties;
dc->realize = or1k_ompic_realize;
dc->vmsd = &vmstate_or1k_ompic;
}
static const TypeInfo or1k_ompic_info = {
.name = TYPE_OR1K_OMPIC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(OR1KOMPICState),
.instance_init = or1k_ompic_init,
.class_init = or1k_ompic_class_init,
};
static void or1k_ompic_register_types(void)
{
type_register_static(&or1k_ompic_info);
}
type_init(or1k_ompic_register_types)

64
hw/openrisc/cputimer.c
View File

@ -25,48 +25,64 @@
#define TIMER_PERIOD 50 /* 50 ns period for 20 MHz timer */
/* The time when TTCR changes */
static uint64_t last_clk;
static int is_counting;
/* Tick Timer global state to allow all cores to be in sync */
typedef struct OR1KTimerState {
uint32_t ttcr;
uint64_t last_clk;
} OR1KTimerState;
static OR1KTimerState *or1k_timer;
void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val)
{
or1k_timer->ttcr = val;
}
uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu)
{
return or1k_timer->ttcr;
}
/* Add elapsed ticks to ttcr */
void cpu_openrisc_count_update(OpenRISCCPU *cpu)
{
uint64_t now;
if (!is_counting) {
if (!cpu->env.is_counting) {
return;
}
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
cpu->env.ttcr += (uint32_t)((now - last_clk) / TIMER_PERIOD);
last_clk = now;
or1k_timer->ttcr += (uint32_t)((now - or1k_timer->last_clk)
/ TIMER_PERIOD);
or1k_timer->last_clk = now;
}
/* Update the next timeout time as difference between ttmr and ttcr */
void cpu_openrisc_timer_update(OpenRISCCPU *cpu)
{
uint32_t wait;
uint64_t now, next;
if (!is_counting) {
if (!cpu->env.is_counting) {
return;
}
cpu_openrisc_count_update(cpu);
now = last_clk;
now = or1k_timer->last_clk;
if ((cpu->env.ttmr & TTMR_TP) <= (cpu->env.ttcr & TTMR_TP)) {
wait = TTMR_TP - (cpu->env.ttcr & TTMR_TP) + 1;
if ((cpu->env.ttmr & TTMR_TP) <= (or1k_timer->ttcr & TTMR_TP)) {
wait = TTMR_TP - (or1k_timer->ttcr & TTMR_TP) + 1;
wait += cpu->env.ttmr & TTMR_TP;
} else {
wait = (cpu->env.ttmr & TTMR_TP) - (cpu->env.ttcr & TTMR_TP);
wait = (cpu->env.ttmr & TTMR_TP) - (or1k_timer->ttcr & TTMR_TP);
}
next = now + (uint64_t)wait * TIMER_PERIOD;
timer_mod(cpu->env.timer, next);
qemu_cpu_kick(CPU(cpu));
}
void cpu_openrisc_count_start(OpenRISCCPU *cpu)
{
is_counting = 1;
cpu->env.is_counting = 1;
cpu_openrisc_count_update(cpu);
}
@ -74,7 +90,7 @@ void cpu_openrisc_count_stop(OpenRISCCPU *cpu)
{
timer_del(cpu->env.timer);
cpu_openrisc_count_update(cpu);
is_counting = 0;
cpu->env.is_counting = 0;
}
static void openrisc_timer_cb(void *opaque)
@ -93,7 +109,7 @@ static void openrisc_timer_cb(void *opaque)
case TIMER_NONE:
break;
case TIMER_INTR:
cpu->env.ttcr = 0;
or1k_timer->ttcr = 0;
break;
case TIMER_SHOT:
cpu_openrisc_count_stop(cpu);
@ -103,11 +119,27 @@ static void openrisc_timer_cb(void *opaque)
}
cpu_openrisc_timer_update(cpu);
qemu_cpu_kick(CPU(cpu));
}
static const VMStateDescription vmstate_or1k_timer = {
.name = "or1k_timer",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(ttcr, OR1KTimerState),
VMSTATE_UINT64(last_clk, OR1KTimerState),
VMSTATE_END_OF_LIST()
}
};
void cpu_openrisc_clock_init(OpenRISCCPU *cpu)
{
cpu->env.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &openrisc_timer_cb, cpu);
cpu->env.ttmr = 0x00000000;
cpu->env.ttcr = 0x00000000;
if (or1k_timer == NULL) {
or1k_timer = g_new0(OR1KTimerState, 1);
vmstate_register(NULL, 0, &vmstate_or1k_timer, or1k_timer);
}
}

90
hw/openrisc/openrisc_sim.c
View File

@ -35,36 +35,60 @@
#define KERNEL_LOAD_ADDR 0x100
static struct openrisc_boot_info {
uint32_t bootstrap_pc;
} boot_info;
static void main_cpu_reset(void *opaque)
{
OpenRISCCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
cpu_reset(CPU(cpu));
cpu_set_pc(cs, boot_info.bootstrap_pc);
}
static void openrisc_sim_net_init(MemoryRegion *address_space,
hwaddr base,
hwaddr descriptors,
qemu_irq irq, NICInfo *nd)
static void openrisc_sim_net_init(hwaddr base, hwaddr descriptors,
int num_cpus, qemu_irq **cpu_irqs,
int irq_pin, NICInfo *nd)
{
DeviceState *dev;
SysBusDevice *s;
int i;
dev = qdev_create(NULL, "open_eth");
qdev_set_nic_properties(dev, nd);
qdev_init_nofail(dev);
s = SYS_BUS_DEVICE(dev);
sysbus_connect_irq(s, 0, irq);
memory_region_add_subregion(address_space, base,
sysbus_mmio_get_region(s, 0));
memory_region_add_subregion(address_space, descriptors,
sysbus_mmio_get_region(s, 1));
for (i = 0; i < num_cpus; i++) {
sysbus_connect_irq(s, 0, cpu_irqs[i][irq_pin]);
}
sysbus_mmio_map(s, 0, base);
sysbus_mmio_map(s, 1, descriptors);
}
static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
const char *kernel_filename,
OpenRISCCPU *cpu)
static void openrisc_sim_ompic_init(hwaddr base, int num_cpus,
qemu_irq **cpu_irqs, int irq_pin)
{
DeviceState *dev;
SysBusDevice *s;
int i;
dev = qdev_create(NULL, "or1k-ompic");
qdev_prop_set_uint32(dev, "num-cpus", num_cpus);
qdev_init_nofail(dev);
s = SYS_BUS_DEVICE(dev);
for (i = 0; i < num_cpus; i++) {
sysbus_connect_irq(s, i, cpu_irqs[i][irq_pin]);
}
sysbus_mmio_map(s, 0, base);
}
static void openrisc_load_kernel(ram_addr_t ram_size,
const char *kernel_filename)
{
long kernel_size;
uint64_t elf_entry;
@ -83,6 +107,9 @@ static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
kernel_size = load_image_targphys(kernel_filename,
KERNEL_LOAD_ADDR,
ram_size - KERNEL_LOAD_ADDR);
}
if (entry <= 0) {
entry = KERNEL_LOAD_ADDR;
}
@ -91,7 +118,7 @@ static void cpu_openrisc_load_kernel(ram_addr_t ram_size,
kernel_filename);
exit(1);
}
cpu->env.pc = entry;
boot_info.bootstrap_pc = entry;
}
}
@ -102,6 +129,8 @@ static void openrisc_sim_init(MachineState *machine)
const char *kernel_filename = machine->kernel_filename;
OpenRISCCPU *cpu = NULL;
MemoryRegion *ram;
qemu_irq *cpu_irqs[2];
qemu_irq serial_irq;
int n;
if (!cpu_model) {
@ -110,33 +139,46 @@ static void openrisc_sim_init(MachineState *machine)
for (n = 0; n < smp_cpus; n++) {
cpu = OPENRISC_CPU(cpu_generic_init(TYPE_OPENRISC_CPU, cpu_model));
if (cpu == NULL) {
fprintf(stderr, "Unable to find CPU definition!\n");
exit(1);
}
cpu_openrisc_pic_init(cpu);
cpu_irqs[n] = (qemu_irq *) cpu->env.irq;
cpu_openrisc_clock_init(cpu);
qemu_register_reset(main_cpu_reset, cpu);
main_cpu_reset(cpu);
}
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, NULL, "openrisc.ram", ram_size, &error_fatal);
memory_region_add_subregion(get_system_memory(), 0, ram);
cpu_openrisc_pic_init(cpu);
cpu_openrisc_clock_init(cpu);
serial_mm_init(get_system_memory(), 0x90000000, 0, cpu->env.irq[2],
115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
if (nd_table[0].used) {
openrisc_sim_net_init(get_system_memory(), 0x92000000,
0x92000400, cpu->env.irq[4], nd_table);
openrisc_sim_net_init(0x92000000, 0x92000400, smp_cpus,
cpu_irqs, 4, nd_table);
}
cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu);
if (smp_cpus > 1) {
openrisc_sim_ompic_init(0x98000000, smp_cpus, cpu_irqs, 1);
serial_irq = qemu_irq_split(cpu_irqs[0][2], cpu_irqs[1][2]);
} else {
serial_irq = cpu_irqs[0][2];
}
serial_mm_init(get_system_memory(), 0x90000000, 0, serial_irq,
115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);
openrisc_load_kernel(ram_size, kernel_filename);
}
static void openrisc_sim_machine_init(MachineClass *mc)
{
mc->desc = "or1k simulation";
mc->init = openrisc_sim_init;
mc->max_cpus = 1;
mc->max_cpus = 2;
mc->is_default = 1;
}

1
target/openrisc/cpu.c
View File

@ -61,7 +61,6 @@ static void openrisc_cpu_reset(CPUState *s)
cpu->env.picsr = 0x00000000;
cpu->env.ttmr = 0x00000000;
cpu->env.ttcr = 0x00000000;
#endif
}

4
target/openrisc/cpu.h
View File

@ -315,7 +315,7 @@ typedef struct CPUOpenRISCState {
QEMUTimer *timer;
uint32_t ttmr; /* Timer tick mode register */
uint32_t ttcr; /* Timer tick count register */
int is_counting;
uint32_t picmr; /* Interrupt mask register */
uint32_t picsr; /* Interrupt contrl register*/
@ -371,6 +371,8 @@ void cpu_openrisc_pic_init(OpenRISCCPU *cpu);
/* hw/openrisc_timer.c */
void cpu_openrisc_clock_init(OpenRISCCPU *cpu);
uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu);
void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val);
void cpu_openrisc_count_update(OpenRISCCPU *cpu);
void cpu_openrisc_timer_update(OpenRISCCPU *cpu);
void cpu_openrisc_count_start(OpenRISCCPU *cpu);

1
target/openrisc/machine.c
View File

@ -147,7 +147,6 @@ static const VMStateDescription vmstate_env = {
VMSTATE_TIMER_PTR(timer, CPUOpenRISCState),
VMSTATE_UINT32(ttmr, CPUOpenRISCState),
VMSTATE_UINT32(ttcr, CPUOpenRISCState),
VMSTATE_UINT32(picmr, CPUOpenRISCState),
VMSTATE_UINT32(picsr, CPUOpenRISCState),

9
target/openrisc/sys_helper.c
View File

@ -23,6 +23,7 @@
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "exception.h"
#include "sysemu/sysemu.h"
#define TO_SPR(group, number) (((group) << 11) + (number))
@ -188,7 +189,7 @@ void HELPER(mtspr)(CPUOpenRISCState *env,
break;
case TO_SPR(10, 1): /* TTCR */
env->ttcr = rb;
cpu_openrisc_count_set(cpu, rb);
if (env->ttmr & TIMER_NONE) {
return;
}
@ -249,10 +250,10 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env,
return env->esr;
case TO_SPR(0, 128): /* COREID */
return 0;
return cpu->parent_obj.cpu_index;
case TO_SPR(0, 129): /* NUMCORES */
return 1;
return max_cpus;
case TO_SPR(0, 1024) ... TO_SPR(0, 1024 + (16 * 32)): /* Shadow GPRs */
idx = (spr - 1024);
@ -311,7 +312,7 @@ target_ulong HELPER(mfspr)(CPUOpenRISCState *env,
case TO_SPR(10, 1): /* TTCR */
cpu_openrisc_count_update(cpu);
return env->ttcr;
return cpu_openrisc_count_get(cpu);
default:
break;