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[1/2] ioport: add function to check whenever a port is assigned or not

Message ID 1273610601-12805-1-git-send-email-kraxel@redhat.com
State New
Headers show

Commit Message

Gerd Hoffmann May 11, 2010, 8:43 p.m. UTC 
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ioport.c |    5 +++++
 ioport.h |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
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Patch

diff --git a/ioport.c b/ioport.c
index 53dd87a..b718047 100644
--- a/ioport.c
+++ b/ioport.c
@@ -190,6 +190,11 @@  void isa_unassign_ioport(pio_addr_t start, int length)
     }
 }
 
+int is_ioport_assigned(pio_addr_t addr)
+{
+    return ioport_opaque[addr] != NULL;
+}
+
 /***********************************************************/
 
 void cpu_outb(pio_addr_t addr, uint8_t val)
diff --git a/ioport.h b/ioport.h
index 3d3c8a3..46fbfa8 100644
--- a/ioport.h
+++ b/ioport.h
@@ -41,6 +41,7 @@  int register_ioport_read(pio_addr_t start, int length, int size,
 int register_ioport_write(pio_addr_t start, int length, int size,
                           IOPortWriteFunc *func, void *opaque);
 void isa_unassign_ioport(pio_addr_t start, int length);
+int is_ioport_assigned(pio_addr_t addr);
 
 
 void cpu_outb(pio_addr_t addr, uint8_t val);