[Qemu-devel] [PATCH v4 02/15] pci: introduce helper functions to clear/set bits in configuration space

[Isaku Yamahata]

This patch introduces helper functions to clear/set bits in configuration
space. pci_{clear_set, clear, set}_bit_{byte, word, long, quad}().
They will be used later.

Signed-off-by: Isaku Yamahata <address@hidden>
---
 hw/pci.h |   72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 72 insertions(+), 0 deletions(-)

diff --git a/hw/pci.h b/hw/pci.h
index d8b399f..eafa9f3 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -323,6 +323,78 @@ pci_config_set_interrupt_pin(uint8_t *pci_config, uint8_t 
val)
     pci_set_byte(&pci_config[PCI_INTERRUPT_PIN], val);
 }
 
+static inline void
+pci_clear_set_bit_byte(uint8_t *config, uint8_t clear, uint8_t set)
+{
+    pci_set_byte(config, (pci_get_byte(config) & ~clear) | set);
+}
+
+static inline void
+pci_clear_bit_byte(uint8_t *config, uint8_t clear)
+{
+    pci_clear_set_bit_byte(config, clear, 0);
+}
+
+static inline void
+pci_set_bit_byte(uint8_t *config, uint8_t set)
+{
+    pci_clear_set_bit_byte(config, 0, set);
+}
+
+static inline void
+pci_clear_set_bit_word(uint8_t *config, uint16_t clear, uint16_t set)
+{
+    pci_set_word(config, (pci_get_word(config) & ~clear) | set);
+}
+
+static inline void
+pci_clear_bit_word(uint8_t *config, uint16_t clear)
+{
+    pci_clear_set_bit_word(config, clear, 0);
+}
+
+static inline void
+pci_set_bit_word(uint8_t *config, uint16_t set)
+{
+    pci_clear_set_bit_word(config, 0, set);
+}
+
+static inline void
+pci_clear_set_bit_long(uint8_t *config, uint32_t clear, uint32_t set)
+{
+    pci_set_long(config, (pci_get_long(config) & ~clear) | set);
+}
+
+static inline void
+pci_clear_bit_long(uint8_t *config, uint32_t clear)
+{
+    pci_clear_set_bit_long(config, clear, 0);
+}
+
+static inline void
+pci_set_bit_long(uint8_t *config, uint32_t set)
+{
+    pci_clear_set_bit_long(config, 0, set);
+}
+
+static inline void
+pci_clear_set_bit_quad(uint8_t *config, uint64_t clear, uint64_t set)
+{
+    pci_set_quad(config, (pci_get_quad(config) & ~clear) | set);
+}
+
+static inline void
+pci_clear_bit_quad(uint8_t *config, uint64_t clear)
+{
+    pci_clear_set_bit_quad(config, clear, 0);
+}
+
+static inline void
+pci_set_bit_quad(uint8_t *config, uint64_t set)
+{
+    pci_clear_set_bit_quad(config, 0, set);
+}
+
 typedef int (*pci_qdev_initfn)(PCIDevice *dev);
 typedef struct {
     DeviceInfo qdev;
-- 
1.7.1.1