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A slight PIC rework.

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This commit is contained in:
OBattler
2023-10-01 20:37:30 +02:00
parent 76160c4d1d
commit ebd5f950bc
1 changed files with 63 additions and 82 deletions
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145
src/pic.c
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@@ -634,9 +634,12 @@ void
picint_common(uint16_t num, int level, int set, uint8_t *irq_state)
{
int raise;
int max = 16;
uint8_t b;
uint8_t slaves = 0;
uint16_t w;
uint16_t lines = level ? 0x0000 : num;
pic_t *dev;
/* Make sure to ignore all slave IRQ's, and in case of AT+,
translate IRQ 2 to IRQ 9. */
@@ -656,112 +659,90 @@ picint_common(uint16_t num, int level, int set, uint8_t *irq_state)
}
if (!slaves)
num &= 0x00ff;
max = 8;
if (!num) {
pic_log("Attempting to %s null IRQ\n", set ? "raise" : "lower");
return;
}
if (num & 0x0100)
acpi_rtc_status = !!set;
if (level) {
dev = &pic;
if (set) {
if (smi_irq_mask & num) {
smi_raise();
smi_irq_status |= num;
for (uint16_t i = 0; i < max; i++) {
if (i == 8)
dev = &pic2;
b = i & 7;
w = 1 << i;
if (num & w) {
if ((!!*irq_state) != !!set)
set ? dev->lines[b]++ : dev->lines[b]--;
if ((!pic_level_triggered(dev, b) || ((!!*irq_state) != !!set)))
lines |= w;
}
}
if (num & 0xff00) {
if (level) {
for (uint8_t i = 0; i < 8; i++) {
b = (uint8_t) (1 << i);
if (((num >> 8) & b) && ((!!*irq_state) != !!set))
pic2.lines[i]++;
}
if ((!!*irq_state) != !!set)
*irq_state = set;
if ((!!*irq_state) != !!set)
*irq_state = set;
num = lines;
}
if (!slaves)
num &= 0x00ff;
if (num & 0x0100)
acpi_rtc_status = !!set;
if (num) {
if (set) {
if (smi_irq_mask & num) {
smi_raise();
smi_irq_status |= num;
}
/* Latch IRQ 12 if the mouse latch is enabled. */
if ((num & 0x1000) && mouse_latch)
latched_irqs |= 0x1000;
if (num & 0xff00) {
/* Latch IRQ 12 if the mouse latch is enabled. */
if ((num & 0x1000) && mouse_latch)
latched_irqs |= 0x1000;
pic2.irr |= (num >> 8);
}
if (num & 0x00ff) {
if (level) {
for (uint8_t i = 0; i < 8; i++) {
b = (uint8_t) (1 << i);
if ((num & b) && ((!!*irq_state) != !!set))
pic.lines[i]++;
}
if ((!!*irq_state) != !!set)
*irq_state = set;
pic2.irr |= (num >> 8);
}
/* Latch IRQ 1 if the keyboard latch is enabled. */
if (kbd_latch && (num & 0x0002))
latched_irqs |= 0x0002;
if (num & 0x00ff) {
/* Latch IRQ 1 if the keyboard latch is enabled. */
if (kbd_latch && (num & 0x0002))
latched_irqs |= 0x0002;
pic.irr |= (num & 0x00ff);
}
} else {
smi_irq_status &= ~num;
pic.irr |= (num & 0x00ff);
}
} else {
smi_irq_status &= ~num;
if (num & 0xff00) {
if (level) {
for (uint8_t i = 0; i < 8; i++) {
b = (uint8_t) (1 << i);
if ((num >> 8) & b) {
if ((!!*irq_state) != !!set)
pic2.lines[i]--;
if (!pic_level_triggered(&pic2, i) || (pic2.lines[i] == 0))
lines |= ((uint16_t) b << 8);
}
}
if (num & 0xff00) {
/* Unlatch IRQ 12 if the mouse latch is enabled. */
if ((num & 0x1000) && mouse_latch)
latched_irqs &= 0xefff;
if ((!!*irq_state) != !!set)
*irq_state = set;
if (!level || lines)
pic2.irr &= ~(num >> 8);
}
/* Unlatch IRQ 12 if the mouse latch is enabled. */
if ((num & 0x1000) && mouse_latch)
latched_irqs &= 0xefff;
if (num & 0x00ff) {
/* Unlatch IRQ 1 if the keyboard latch is enabled. */
if (kbd_latch && (num & 0x0002))
latched_irqs &= 0xfffd;
if (!level || lines)
pic2.irr &= ~(lines >> 8);
}
if (num & 0x00ff) {
if (level) {
for (uint8_t i = 0; i < 8; i++) {
b = (uint8_t) (1 << i);
if (num & b) {
if ((!!*irq_state) != !!set)
pic.lines[i]--;
if (!pic_level_triggered(&pic, i) || (pic.lines[i] == 0))
lines |= ((uint16_t) b);
}
}
if ((!!*irq_state) != !!set)
*irq_state = set;
if (!level || lines)
pic.irr &= ~(num & 0x00ff);
}
/* Unlatch IRQ 1 if the keyboard latch is enabled. */
if (kbd_latch && (num & 0x0002))
latched_irqs &= 0xfffd;
if (!level || lines)
pic.irr &= ~(lines & 0x00ff);
}
update_pending();
}
update_pending();
}
static uint8_t