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Fix irq handling (Hervé Poussineau) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4245 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-04-24 17:20:25 +00:00
parent 938255d2f7
commit c73f96fddc
1 changed files with 33 additions and 15 deletions
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48
hw/esp.c
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@ -127,7 +127,7 @@ struct ESPState {
#define STAT_TC 0x10
#define STAT_PE 0x20
#define STAT_GE 0x40
#define STAT_IN 0x80
#define STAT_INT 0x80
#define INTR_FC 0x08
#define INTR_BS 0x10
@ -143,6 +143,22 @@ struct ESPState {
#define TCHI_FAS100A 0x4
static void esp_raise_irq(ESPState *s)
{
if (!(s->rregs[ESP_RSTAT] & STAT_INT)) {
s->rregs[ESP_RSTAT] |= STAT_INT;
qemu_irq_raise(s->irq);
}
}
static void esp_lower_irq(ESPState *s)
{
if (s->rregs[ESP_RSTAT] & STAT_INT) {
s->rregs[ESP_RSTAT] &= ~STAT_INT;
qemu_irq_lower(s->irq);
}
}
static int get_cmd(ESPState *s, uint8_t *buf)
{
uint32_t dmalen;
@ -171,10 +187,10 @@ static int get_cmd(ESPState *s, uint8_t *buf)
if (target >= ESP_MAX_DEVS || !s->scsi_dev[target]) {
// No such drive
s->rregs[ESP_RSTAT] = STAT_IN;
s->rregs[ESP_RSTAT] = 0;
s->rregs[ESP_RINTR] = INTR_DC;
s->rregs[ESP_RSEQ] = SEQ_0;
qemu_irq_raise(s->irq);
esp_raise_irq(s);
return 0;
}
s->current_dev = s->scsi_dev[target];
@ -191,7 +207,7 @@ static void do_cmd(ESPState *s, uint8_t *buf)
datalen = s->current_dev->send_command(s->current_dev, 0, &buf[1], lun);
s->ti_size = datalen;
if (datalen != 0) {
s->rregs[ESP_RSTAT] = STAT_IN | STAT_TC;
s->rregs[ESP_RSTAT] = STAT_TC;
s->dma_left = 0;
s->dma_counter = 0;
if (datalen > 0) {
@ -204,7 +220,7 @@ static void do_cmd(ESPState *s, uint8_t *buf)
}
s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
s->rregs[ESP_RSEQ] = SEQ_CD;
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
static void handle_satn(ESPState *s)
@ -223,10 +239,10 @@ static void handle_satn_stop(ESPState *s)
if (s->cmdlen) {
DPRINTF("Set ATN & Stop: cmdlen %d\n", s->cmdlen);
s->do_cmd = 1;
s->rregs[ESP_RSTAT] = STAT_IN | STAT_TC | STAT_CD;
s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD;
s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
s->rregs[ESP_RSEQ] = SEQ_CD;
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
}
@ -237,7 +253,7 @@ static void write_response(ESPState *s)
s->ti_buf[1] = 0;
if (s->dma) {
s->dma_memory_write(s->dma_opaque, s->ti_buf, 2);
s->rregs[ESP_RSTAT] = STAT_IN | STAT_TC | STAT_ST;
s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST;
s->rregs[ESP_RINTR] = INTR_BS | INTR_FC;
s->rregs[ESP_RSEQ] = SEQ_CD;
} else {
@ -246,18 +262,18 @@ static void write_response(ESPState *s)
s->ti_wptr = 0;
s->rregs[ESP_RFLAGS] = 2;
}
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
static void esp_dma_done(ESPState *s)
{
s->rregs[ESP_RSTAT] |= STAT_IN | STAT_TC;
s->rregs[ESP_RSTAT] |= STAT_TC;
s->rregs[ESP_RINTR] = INTR_BS;
s->rregs[ESP_RSEQ] = 0;
s->rregs[ESP_RFLAGS] = 0;
s->rregs[ESP_TCLO] = 0;
s->rregs[ESP_TCMID] = 0;
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
static void esp_do_dma(ESPState *s)
@ -381,6 +397,8 @@ static void esp_reset(void *opaque)
{
ESPState *s = opaque;
esp_lower_irq(s);
memset(s->rregs, 0, ESP_REGS);
memset(s->wregs, 0, ESP_REGS);
s->rregs[ESP_TCHI] = TCHI_FAS100A; // Indicate fas100a
@ -415,7 +433,7 @@ static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
} else {
s->rregs[ESP_FIFO] = s->ti_buf[s->ti_rptr++];
}
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
if (s->ti_size == 0) {
s->ti_rptr = 0;
@ -424,8 +442,8 @@ static uint32_t esp_mem_readb(void *opaque, target_phys_addr_t addr)
break;
case ESP_RINTR:
// Clear interrupt/error status bits
s->rregs[ESP_RSTAT] &= ~(STAT_IN | STAT_GE | STAT_PE);
qemu_irq_lower(s->irq);
s->rregs[ESP_RSTAT] &= ~(STAT_GE | STAT_PE);
esp_lower_irq(s);
break;
default:
break;
@ -487,7 +505,7 @@ static void esp_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
DPRINTF("Bus reset (%2.2x)\n", val);
s->rregs[ESP_RINTR] = INTR_RST;
if (!(s->wregs[ESP_CFG1] & CFG1_RESREPT)) {
qemu_irq_raise(s->irq);
esp_raise_irq(s);
}
break;
case CMD_TI: