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ETRAX: Correctly update the interrupt vector when interrupts get masked. 

Cannot believe this bug has been around for so long.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6207 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
edgar_igl 2009-01-07 13:30:41 +00:00
parent ab86bb3b08
commit 70ea255d8b
1 changed files with 38 additions and 64 deletions
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102
hw/etraxfs_pic.c
View File

@ -41,13 +41,40 @@ struct fs_pic_state_t
uint32_t r_guru;
};
static uint32_t pic_readb (void *opaque, target_phys_addr_t addr)
{
return 0;
}
static uint32_t pic_readw (void *opaque, target_phys_addr_t addr)
{
return 0;
static void pic_update(struct fs_pic_state_t *fs)
{
CPUState *env = fs->env;
int i;
uint32_t vector = 0;
fs->r_masked_vect = fs->r_vect & fs->rw_mask;
/* The ETRAX interrupt controller signals interrupts to teh core
through an interrupt request wire and an irq vector bus. If
multiple interrupts are simultaneously active it chooses vector
0x30 and lets the sw choose the priorities. */
if (fs->r_masked_vect) {
uint32_t mv = fs->r_masked_vect;
for (i = 0; i < 31; i++) {
if (mv & 1) {
vector = 0x31 + i;
/* Check for multiple interrupts. */
if (mv > 1)
vector = 0x30;
break;
}
mv >>= 1;
}
if (vector) {
env->interrupt_vector = vector;
D(printf("%s vector=%x\n", __func__, vector));
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
} else {
env->interrupt_vector = 0;
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
D(printf("%s reset irqs\n", __func__));
}
}
static uint32_t pic_readl (void *opaque, target_phys_addr_t addr)
@ -81,16 +108,6 @@ static uint32_t pic_readl (void *opaque, target_phys_addr_t addr)
return rval;
}
static void
pic_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
{
}
static void
pic_writew (void *opaque, target_phys_addr_t addr, uint32_t value)
{
}
static void
pic_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
@ -100,18 +117,7 @@ pic_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
{
case 0x0:
fs->rw_mask = value;
break;
case 0x4:
fs->r_vect = value;
break;
case 0x8:
fs->r_masked_vect = value;
break;
case 0xc:
fs->r_nmi = value;
break;
case 0x10:
fs->r_guru = value;
pic_update(fs);
break;
default:
cpu_abort(fs->env, "invalid PIC register.\n");
@ -120,14 +126,12 @@ pic_writel (void *opaque, target_phys_addr_t addr, uint32_t value)
}
static CPUReadMemoryFunc *pic_read[] = {
&pic_readb,
&pic_readw,
NULL, NULL,
&pic_readl,
};
static CPUWriteMemoryFunc *pic_write[] = {
&pic_writeb,
&pic_writew,
NULL, NULL,
&pic_writel,
};
@ -142,9 +146,6 @@ void irq_info(void)
static void irq_handler(void *opaque, int irq, int level)
{
struct fs_pic_state_t *fs = (void *)opaque;
CPUState *env = fs->env;
int i;
uint32_t vector = 0;
D(printf("%s irq=%d level=%d mask=%x v=%x mv=%x\n",
__func__, irq, level,
@ -153,34 +154,8 @@ static void irq_handler(void *opaque, int irq, int level)
irq -= 1;
fs->r_vect &= ~(1 << irq);
fs->r_vect |= (!!level << irq);
fs->r_masked_vect = fs->r_vect & fs->rw_mask;
/* The ETRAX interrupt controller signals interrupts to teh core
through an interrupt request wire and an irq vector bus. If
multiple interrupts are simultaneously active it chooses vector
0x30 and lets the sw choose the priorities. */
if (fs->r_masked_vect) {
uint32_t mv = fs->r_masked_vect;
for (i = 0; i < 31; i++) {
if (mv & 1) {
vector = 0x31 + i;
/* Check for multiple interrupts. */
if (mv > 1)
vector = 0x30;
break;
}
mv >>= 1;
}
if (vector) {
env->interrupt_vector = vector;
D(printf("%s vector=%x\n", __func__, vector));
cpu_interrupt(env, CPU_INTERRUPT_HARD);
}
} else {
env->interrupt_vector = 0;
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
D(printf("%s reset irqs\n", __func__));
}
pic_update(fs);
}
static void nmi_handler(void *opaque, int irq, int level)
@ -209,7 +184,6 @@ static void guru_handler(void *opaque, int irq, int level)
}
struct etraxfs_pic *etraxfs_pic_init(CPUState *env, target_phys_addr_t base)
{
struct fs_pic_state_t *fs = NULL;