These functions are generic in nature and can be reused by other emulation
code in Xen. One recent example is pl011 emulation, which needs similar
funictions to read/write the registers.
This patch moves the register access function definitions from vgic.h to
vreg.h.
Signed-off-by: Bhupinder Thakur <bhupinder.tha...@linaro.org>
---
xen/include/asm-arm/vgic.h | 99 +---------------------------------------------
xen/include/asm-arm/vreg.h | 98 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+), 98 deletions(-)
diff --git a/xen/include/asm-arm/vgic.h b/xen/include/asm-arm/vgic.h
index 544867a..c838298 100644
--- a/xen/include/asm-arm/vgic.h
+++ b/xen/include/asm-arm/vgic.h
@@ -20,6 +20,7 @@
#include <xen/bitops.h>
#include <asm/mmio.h>
+#include <asm-arm/vreg.h>
struct pending_irq
{
@@ -171,104 +172,6 @@ static inline int REG_RANK_NR(int b, uint32_t n)
}
}
-#define VGIC_REG_MASK(size) ((~0UL) >> (BITS_PER_LONG - ((1 << (size)) * 8)))
-
-/*
- * The check on the size supported by the register has to be done by
- * the caller of vgic_regN_*.
- *
- * vgic_reg_* should never be called directly. Instead use the vgic_regN_*
- * according to size of the emulated register
- *
- * Note that the alignment fault will always be taken in the guest
- * (see B3.12.7 DDI0406.b).
- */
-static inline register_t vgic_reg_extract(unsigned long reg,
- unsigned int offset,
- enum dabt_size size)
-{
- reg >>= 8 * offset;
- reg &= VGIC_REG_MASK(size);
-
- return reg;
-}
-
-static inline void vgic_reg_update(unsigned long *reg, register_t val,
- unsigned int offset,
- enum dabt_size size)
-{
- unsigned long mask = VGIC_REG_MASK(size);
- int shift = offset * 8;
-
- *reg &= ~(mask << shift);
- *reg |= ((unsigned long)val & mask) << shift;
-}
-
-static inline void vgic_reg_setbits(unsigned long *reg, register_t bits,
- unsigned int offset,
- enum dabt_size size)
-{
- unsigned long mask = VGIC_REG_MASK(size);
- int shift = offset * 8;
-
- *reg |= ((unsigned long)bits & mask) << shift;
-}
-
-static inline void vgic_reg_clearbits(unsigned long *reg, register_t bits,
- unsigned int offset,
- enum dabt_size size)
-{
- unsigned long mask = VGIC_REG_MASK(size);
- int shift = offset * 8;
-
- *reg &= ~(((unsigned long)bits & mask) << shift);
-}
-
-/* N-bit register helpers */
-#define VGIC_REG_HELPERS(sz, offmask) \
-static inline register_t vgic_reg##sz##_extract(uint##sz##_t reg, \
- const mmio_info_t *info)\
-{ \
- return vgic_reg_extract(reg, info->gpa & offmask, \
- info->dabt.size); \
-} \
- \
-static inline void vgic_reg##sz##_update(uint##sz##_t *reg, \
- register_t val, \
- const mmio_info_t *info) \
-{ \
- unsigned long tmp = *reg; \
- \
- vgic_reg_update(&tmp, val, info->gpa & offmask, \
- info->dabt.size); \
- \
- *reg = tmp; \
-} \
- \
-static inline void vgic_reg##sz##_setbits(uint##sz##_t *reg, \
- register_t bits, \
- const mmio_info_t *info) \
-{ \
- unsigned long tmp = *reg; \
- \
- vgic_reg_setbits(&tmp, bits, info->gpa & offmask, \
- info->dabt.size); \
- \
- *reg = tmp; \
-} \
- \
-static inline void vgic_reg##sz##_clearbits(uint##sz##_t *reg, \
- register_t bits, \
- const mmio_info_t *info) \
-{ \
- unsigned long tmp = *reg; \
- \
- vgic_reg_clearbits(&tmp, bits, info->gpa & offmask, \
- info->dabt.size); \
- \
- *reg = tmp; \
-}
-
/*
* 64 bits registers are only supported on platform with 64-bit long.
* This is also allow us to optimize the 32 bit case by using
diff --git a/xen/include/asm-arm/vreg.h b/xen/include/asm-arm/vreg.h
index ed2bd6f..1442c58 100644
--- a/xen/include/asm-arm/vreg.h
+++ b/xen/include/asm-arm/vreg.h
@@ -107,4 +107,102 @@ static inline bool vreg_emulate_sysreg64(struct
cpu_user_regs *regs, union hsr h
#endif
+#define VGIC_REG_MASK(size) ((~0UL) >> (BITS_PER_LONG - ((1 << (size)) * 8)))
+
+/*
+ * The check on the size supported by the register has to be done by
+ * the caller of vgic_regN_*.
+ *
+ * vgic_reg_* should never be called directly. Instead use the vgic_regN_*
+ * according to size of the emulated register
+ *
+ * Note that the alignment fault will always be taken in the guest
+ * (see B3.12.7 DDI0406.b).
+ */
+static inline register_t vgic_reg_extract(unsigned long reg,
+ unsigned int offset,
+ enum dabt_size size)
+{
+ reg >>= 8 * offset;
+ reg &= VGIC_REG_MASK(size);
+
+ return reg;
+}
+
+static inline void vgic_reg_update(unsigned long *reg, register_t val,
+ unsigned int offset,
+ enum dabt_size size)
+{
+ unsigned long mask = VGIC_REG_MASK(size);
+ int shift = offset * 8;
+
+ *reg &= ~(mask << shift);
+ *reg |= ((unsigned long)val & mask) << shift;
+}
+
+static inline void vgic_reg_setbits(unsigned long *reg, register_t bits,
+ unsigned int offset,
+ enum dabt_size size)
+{
+ unsigned long mask = VGIC_REG_MASK(size);
+ int shift = offset * 8;
+
+ *reg |= ((unsigned long)bits & mask) << shift;
+}
+
+static inline void vgic_reg_clearbits(unsigned long *reg, register_t bits,
+ unsigned int offset,
+ enum dabt_size size)
+{
+ unsigned long mask = VGIC_REG_MASK(size);
+ int shift = offset * 8;
+
+ *reg &= ~(((unsigned long)bits & mask) << shift);
+}
+
+/* N-bit register helpers */
+#define VGIC_REG_HELPERS(sz, offmask) \
+static inline register_t vgic_reg##sz##_extract(uint##sz##_t reg, \
+ const mmio_info_t *info)\
+{ \
+ return vgic_reg_extract(reg, info->gpa & offmask, \
+ info->dabt.size); \
+} \
+ \
+static inline void vgic_reg##sz##_update(uint##sz##_t *reg, \
+ register_t val, \
+ const mmio_info_t *info) \
+{ \
+ unsigned long tmp = *reg; \
+ \
+ vgic_reg_update(&tmp, val, info->gpa & offmask, \
+ info->dabt.size); \
+ \
+ *reg = tmp; \
+} \
+ \
+static inline void vgic_reg##sz##_setbits(uint##sz##_t *reg, \
+ register_t bits, \
+ const mmio_info_t *info) \
+{ \
+ unsigned long tmp = *reg; \
+ \
+ vgic_reg_setbits(&tmp, bits, info->gpa & offmask, \
+ info->dabt.size); \
+ \
+ *reg = tmp; \
+} \
+ \
+static inline void vgic_reg##sz##_clearbits(uint##sz##_t *reg, \
+ register_t bits, \
+ const mmio_info_t *info) \
+{ \
+ unsigned long tmp = *reg; \
+ \
+ vgic_reg_clearbits(&tmp, bits, info->gpa & offmask, \
+ info->dabt.size); \
+ \
+ *reg = tmp; \
+}
+
#endif /* __ASM_ARM_VREG__ */
--
2.7.4
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