[08/13] brcmutil: add macros for setting bitfields using mask/shift operations

Commit Message

Arend van Spriel March 3, 2013, 11:45 a.m. UTC

Added inline functions to set bitfields in an unsigned integer variable.

Reviewed-by: Hante Meuleman <[e-mail]>
Reviewed-by: Pieter-Paul Giesberts <[e-mail]>
Signed-off-by: Arend van Spriel <[e-mail]>
---
 .../net/wireless/brcm80211/include/brcmu_utils.h   |   23 ++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

Patch

diff --git a/drivers/net/wireless/brcm80211/include/brcmu_utils.h b/drivers/net/wireless/brcm80211/include/brcmu_utils.h
index 477b92a..82fcfe8 100644
--- a/drivers/net/wireless/brcm80211/include/brcmu_utils.h
+++ b/drivers/net/wireless/brcm80211/include/brcmu_utils.h
@@ -173,6 +173,29 @@  extern void brcmu_pktq_flush(struct pktq *pq, bool dir,
 /* ip address */
 struct ipv4_addr;
 
+/*
+ * bitfield macros using masking and shift
+ *
+ * remark: the mask parameter should be a shifted mask.
+ */
+static inline void brcmu_maskset32(u32 *var, u32 mask, u8 shift, u32 value)
+{
+	value = (value << shift) & mask;
+	*var = (*var & ~mask) | value;
+}
+static inline u32 brcmu_maskget32(u32 var, u32 mask, u8 shift)
+{
+	return (var & mask) >> shift;
+}
+static inline void brcmu_maskset16(u16 *var, u16 mask, u8 shift, u16 value)
+{
+	value = (value << shift) & mask;
+	*var = (*var & ~mask) | value;
+}
+static inline u16 brcmu_maskget16(u16 var, u16 mask, u8 shift)
+{
+	return (var & mask) >> shift;
+}
 
 /* externs */
 /* format/print */