haraldwolff/qemu-patch-raspberry4
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Use qemu_irqs between CPUs and interrupt controller

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Fix interrupt priority handling which prevented SMP from working


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2875 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2007-05-27 16:42:29 +00:00
parent d7edfd2702
commit b3a2319792
3 changed files with 98 additions and 82 deletions
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128
hw/slavio_intctl.c
View file

@ -44,6 +44,7 @@ do { printf("IRQ: " fmt , ##args); } while (0)
*/
#define MAX_CPUS 16
#define MAX_PILS 16
typedef struct SLAVIO_INTCTLState {
uint32_t intreg_pending[MAX_CPUS];
@ -53,9 +54,10 @@ typedef struct SLAVIO_INTCTLState {
#ifdef DEBUG_IRQ_COUNT
uint64_t irq_count[32];
#endif
CPUState *cpu_envs[MAX_CPUS];
qemu_irq *cpu_irqs[MAX_CPUS];
const uint32_t *intbit_to_level;
uint32_t cputimer_bit;
uint32_t pil_out[MAX_CPUS];
} SLAVIO_INTCTLState;
#define INTCTL_MAXADDR 0xf
@ -213,67 +215,53 @@ void slavio_irq_info(void *opaque)
#endif
}
static void raise_pil(SLAVIO_INTCTLState *s, unsigned int pil,
unsigned int cpu)
{
qemu_irq irq;
unsigned int oldmax;
irq = s->cpu_irqs[cpu][pil];
#ifdef DEBUG_IRQ_COUNT
s->irq_count[pil]++;
#endif
oldmax = s->pil_out[cpu];
if (oldmax > 0 && oldmax != pil)
qemu_irq_lower(s->cpu_irqs[cpu][oldmax]);
s->pil_out[cpu] = pil;
if (pil > 0)
qemu_irq_raise(irq);
DPRINTF("cpu %d pil %d\n", cpu, pil);
}
static void slavio_check_interrupts(void *opaque)
{
CPUState *env;
SLAVIO_INTCTLState *s = opaque;
uint32_t pending = s->intregm_pending;
unsigned int i, j, max = 0;
pending &= ~s->intregm_disabled;
if (pending && !(s->intregm_disabled & 0x80000000)) {
for (i = 0; i < 32; i++) {
if (pending & (1 << i)) {
if (max < s->intbit_to_level[i])
max = s->intbit_to_level[i];
}
}
env = s->cpu_envs[s->target_cpu];
if (!env) {
DPRINTF("No CPU %d, not triggered (pending %x)\n", s->target_cpu, pending);
}
else {
if (env->halted)
env->halted = 0;
if (env->interrupt_index == 0) {
DPRINTF("Triggered CPU %d pil %d\n", s->target_cpu, max);
#ifdef DEBUG_IRQ_COUNT
s->irq_count[max]++;
#endif
env->interrupt_index = TT_EXTINT | max;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
else
DPRINTF("Not triggered (pending %x), pending exception %x\n", pending, env->interrupt_index);
}
}
else
DPRINTF("Not triggered (pending %x), disabled %x\n", pending, s->intregm_disabled);
DPRINTF("pending %x disabled %x\n", pending, s->intregm_disabled);
for (i = 0; i < MAX_CPUS; i++) {
max = 0;
env = s->cpu_envs[i];
if (!env)
continue;
if (pending && !(s->intregm_disabled & 0x80000000) &&
(i == s->target_cpu)) {
for (j = 0; j < 32; j++) {
if (pending & (1 << j)) {
if (max < s->intbit_to_level[j])
max = s->intbit_to_level[j];
}
}
}
for (j = 17; j < 32; j++) {
if (s->intreg_pending[i] & (1 << j)) {
if (max < j - 16)
max = j - 16;
}
}
if (max > 0) {
if (env->halted)
env->halted = 0;
if (env->interrupt_index == 0) {
DPRINTF("Triggered softint %d for cpu %d (pending %x)\n", max, i, pending);
#ifdef DEBUG_IRQ_COUNT
s->irq_count[max]++;
#endif
env->interrupt_index = TT_EXTINT | max;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
}
raise_pil(s, max, i);
}
}
@ -284,22 +272,20 @@ static void slavio_check_interrupts(void *opaque)
static void slavio_set_irq(void *opaque, int irq, int level)
{
SLAVIO_INTCTLState *s = opaque;
uint32_t mask = 1 << irq;
uint32_t pil = s->intbit_to_level[irq];
DPRINTF("Set cpu %d irq %d level %d\n", s->target_cpu, irq, level);
if (irq < 32) {
uint32_t mask = 1 << irq;
uint32_t pil = s->intbit_to_level[irq];
if (pil > 0) {
if (level) {
s->intregm_pending |= mask;
s->intreg_pending[s->target_cpu] |= 1 << pil;
slavio_check_interrupts(s);
}
else {
s->intregm_pending &= ~mask;
s->intreg_pending[s->target_cpu] &= ~(1 << pil);
}
}
DPRINTF("Set cpu %d irq %d -> pil %d level %d\n", s->target_cpu, irq, pil,
level);
if (pil > 0) {
if (level) {
s->intregm_pending |= mask;
s->intreg_pending[s->target_cpu] |= 1 << pil;
} else {
s->intregm_pending &= ~mask;
s->intreg_pending[s->target_cpu] &= ~(1 << pil);
}
slavio_check_interrupts(s);
}
}
@ -307,15 +293,12 @@ static void slavio_set_timer_irq_cpu(void *opaque, int cpu, int level)
{
SLAVIO_INTCTLState *s = opaque;
DPRINTF("Set cpu %d local level %d\n", cpu, level);
if (!s->cpu_envs[cpu])
return;
DPRINTF("Set cpu %d local timer level %d\n", cpu, level);
if (level) {
if (level)
s->intreg_pending[cpu] |= s->cputimer_bit;
} else {
else
s->intreg_pending[cpu] &= ~s->cputimer_bit;
}
slavio_check_interrupts(s);
}
@ -363,18 +346,10 @@ static void slavio_intctl_reset(void *opaque)
s->target_cpu = 0;
}
void slavio_intctl_set_cpu(void *opaque, unsigned int cpu, CPUState *env)
{
SLAVIO_INTCTLState *s = opaque;
s->cpu_envs[cpu] = env;
}
void *slavio_intctl_init(target_phys_addr_t addr, target_phys_addr_t addrg,
const uint32_t *intbit_to_level,
qemu_irq **irq, qemu_irq **cpu_irq,
unsigned int cputimer)
qemu_irq **parent_irq, unsigned int cputimer)
{
int slavio_intctl_io_memory, slavio_intctlm_io_memory, i;
SLAVIO_INTCTLState *s;
@ -388,6 +363,7 @@ void *slavio_intctl_init(target_phys_addr_t addr, target_phys_addr_t addrg,
slavio_intctl_io_memory = cpu_register_io_memory(0, slavio_intctl_mem_read, slavio_intctl_mem_write, s);
cpu_register_physical_memory(addr + i * TARGET_PAGE_SIZE, INTCTL_SIZE,
slavio_intctl_io_memory);
s->cpu_irqs[i] = parent_irq[i];
}
slavio_intctlm_io_memory = cpu_register_io_memory(0, slavio_intctlm_mem_read, slavio_intctlm_mem_write, s);

49
hw/sun4m.c
View file

@ -22,6 +22,7 @@
* THE SOFTWARE.
*/
#include "vl.h"
//#define DEBUG_IRQ
/*
* Sun4m architecture was used in the following machines:
@ -38,6 +39,13 @@
* See for example: http://www.sunhelp.org/faq/sunref1.html
*/
#ifdef DEBUG_IRQ
#define DPRINTF(fmt, args...) \
do { printf("CPUIRQ: " fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...)
#endif
#define KERNEL_LOAD_ADDR 0x00004000
#define CMDLINE_ADDR 0x007ff000
#define INITRD_LOAD_ADDR 0x00800000
@ -46,6 +54,7 @@
#define PROM_FILENAME "openbios-sparc32"
#define MAX_CPUS 16
#define MAX_PILS 16
struct hwdef {
target_phys_addr_t iommu_base, slavio_base;
@ -233,6 +242,33 @@ void irq_info()
slavio_irq_info(slavio_intctl);
}
static void cpu_set_irq(void *opaque, int irq, int level)
{
CPUState *env = opaque;
if (level) {
DPRINTF("Raise CPU IRQ %d\n", irq);
env->halted = 0;
if (env->interrupt_index == 0 ||
((env->interrupt_index & ~15) == TT_EXTINT &&
(env->interrupt_index & 15) < irq)) {
env->interrupt_index = TT_EXTINT | irq;
cpu_interrupt(env, CPU_INTERRUPT_HARD);
} else {
DPRINTF("Not triggered, pending exception %d\n",
env->interrupt_index);
}
} else {
DPRINTF("Lower CPU IRQ %d\n", irq);
}
}
static void dummy_cpu_set_irq(void *opaque, int irq, int level)
{
}
static void *slavio_misc;
void qemu_system_powerdown(void)
@ -264,7 +300,7 @@ static void sun4m_hw_init(const struct hwdef *hwdef, int ram_size,
unsigned int i;
void *iommu, *espdma, *ledma, *main_esp;
const sparc_def_t *def;
qemu_irq *slavio_irq, *slavio_cpu_irq,
qemu_irq *cpu_irqs[MAX_CPUS], *slavio_irq, *slavio_cpu_irq,
*espdma_irq, *ledma_irq;
/* init CPUs */
@ -273,6 +309,7 @@ static void sun4m_hw_init(const struct hwdef *hwdef, int ram_size,
fprintf(stderr, "Unable to find Sparc CPU definition\n");
exit(1);
}
for(i = 0; i < smp_cpus; i++) {
env = cpu_init();
cpu_sparc_register(env, def);
@ -284,7 +321,12 @@ static void sun4m_hw_init(const struct hwdef *hwdef, int ram_size,
env->halted = 1;
}
register_savevm("cpu", i, 3, cpu_save, cpu_load, env);
cpu_irqs[i] = qemu_allocate_irqs(cpu_set_irq, envs[i], MAX_PILS);
}
for (i = smp_cpus; i < MAX_CPUS; i++)
cpu_irqs[i] = qemu_allocate_irqs(dummy_cpu_set_irq, NULL, MAX_PILS);
/* allocate RAM */
cpu_register_physical_memory(0, ram_size, 0);
@ -293,10 +335,9 @@ static void sun4m_hw_init(const struct hwdef *hwdef, int ram_size,
hwdef->intctl_base + 0x10000ULL,
&hwdef->intbit_to_level[0],
&slavio_irq, &slavio_cpu_irq,
cpu_irqs,
hwdef->clock_irq);
for(i = 0; i < smp_cpus; i++) {
slavio_intctl_set_cpu(slavio_intctl, i, envs[i]);
}
espdma = sparc32_dma_init(hwdef->dma_base, slavio_irq[hwdef->esp_irq],
iommu, &espdma_irq);
ledma = sparc32_dma_init(hwdef->dma_base + 16ULL,

3
vl.h
View file

@ -1233,8 +1233,7 @@ void tcx_init(DisplayState *ds, target_phys_addr_t addr, uint8_t *vram_base,
void *slavio_intctl_init(target_phys_addr_t addr, target_phys_addr_t addrg,
const uint32_t *intbit_to_level,
qemu_irq **irq, qemu_irq **cpu_irq,
unsigned int cputimer);
void slavio_intctl_set_cpu(void *opaque, unsigned int cpu, CPUState *env);
qemu_irq **parent_irq, unsigned int cputimer);
void slavio_pic_info(void *opaque);
void slavio_irq_info(void *opaque);