isa: implement isa_is_ioport_assigned via memory_region_find

Open-code isa_is_ioport_assigned via a memory region lookup. As all IO
ports are now directly or indirectly registered via the memory API, this
becomes possible and will finally allow us to drop the ioport tables.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

4 files changed, 10 insertions, 16 deletions

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 756df3bee2..ff559c0a4a 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -383,14 +383,15 @@ static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
 {
     PIIX4PMState *s = container_of(n, PIIX4PMState, machine_ready);
+    MemoryRegion *io_as = pci_address_space_io(&s->dev);
     uint8_t *pci_conf;
 
     pci_conf = s->dev.config;
-    pci_conf[0x5f] = (isa_is_ioport_assigned(0x378) ? 0x80 : 0) | 0x10;
+    pci_conf[0x5f] = 0x10 |
+        (memory_region_find(io_as, 0x378, 1).mr ? 0x80 : 0);
     pci_conf[0x63] = 0x60;
-    pci_conf[0x67] = (isa_is_ioport_assigned(0x3f8) ? 0x08 : 0) |
-	(isa_is_ioport_assigned(0x2f8) ? 0x90 : 0);
-
+    pci_conf[0x67] = (memory_region_find(io_as, 0x3f8, 1).mr ? 0x08 : 0) |
+        (memory_region_find(io_as, 0x2f8, 1).mr ? 0x90 : 0);
 }
 
 static int piix4_pm_initfn(PCIDevice *dev)
diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
index 667e882962..461ab7caf3 100644
--- a/hw/isa/lpc_ich9.c
+++ b/hw/isa/lpc_ich9.c
@@ -477,22 +477,23 @@ static const MemoryRegionOps rbca_mmio_ops = {
 static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
 {
     ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
+    MemoryRegion *io_as = pci_address_space_io(&s->d);
     uint8_t *pci_conf;
 
     pci_conf = s->d.config;
-    if (isa_is_ioport_assigned(0x3f8)) {
+    if (memory_region_find(io_as, 0x3f8, 1).mr) {
         /* com1 */
         pci_conf[0x82] |= 0x01;
     }
-    if (isa_is_ioport_assigned(0x2f8)) {
+    if (memory_region_find(io_as, 0x2f8, 1).mr) {
         /* com2 */
         pci_conf[0x82] |= 0x02;
     }
-    if (isa_is_ioport_assigned(0x378)) {
+    if (memory_region_find(io_as, 0x378, 1).mr) {
         /* lpt */
         pci_conf[0x82] |= 0x04;
     }
-    if (isa_is_ioport_assigned(0x3f0)) {
+    if (memory_region_find(io_as, 0x3f0, 1).mr) {
         /* floppy */
         pci_conf[0x82] |= 0x08;
     }
diff --git a/include/exec/ioport.h b/include/exec/ioport.h
index 4953892c16..eb99ffe583 100644
--- a/include/exec/ioport.h
+++ b/include/exec/ioport.h
@@ -40,7 +40,6 @@ typedef void (IOPortDestructor)(void *opaque);
 
 void ioport_register(IORange *iorange);
 void isa_unassign_ioport(pio_addr_t start, int length);
-bool isa_is_ioport_assigned(pio_addr_t start);
 
 void cpu_outb(pio_addr_t addr, uint8_t val);
 void cpu_outw(pio_addr_t addr, uint16_t val);
diff --git a/ioport.c b/ioport.c
index d5b7fbdb5b..56470c5ec3 100644
--- a/ioport.c
+++ b/ioport.c
@@ -273,13 +273,6 @@ void isa_unassign_ioport(pio_addr_t start, int length)
     }
 }
 
-bool isa_is_ioport_assigned(pio_addr_t start)
-{
-    return (ioport_read_table[0][start] || ioport_write_table[0][start] ||
-	    ioport_read_table[1][start] || ioport_write_table[1][start] ||
-	    ioport_read_table[2][start] || ioport_write_table[2][start]);
-}
-
 /***********************************************************/
 
 void cpu_outb(pio_addr_t addr, uint8_t val)