diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2013-08-20 14:54:31 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-08-20 14:54:31 +0100 |
| commit | 2452731c883cb0acd4e47b23039c46cd880cf2c6 (patch) | |
| tree | e5f6fc479e155d21c5803eaa1e2ca6c4d3e665cc /target-arm/cpu.h | |
| parent | 22d9e1a986a671ebfacb21555b7533336f3e8259 (diff) | |
target-arm: Support coprocessor registers which do I/O
Add an ARM_CP_IO flag which an ARMCPRegInfo definition can use to
indicate that the register's implementation does I/O and thus
its accesses need to be surrounded by gen_io_start()/gen_io_end()
in order for icount to work. Most notably, cp registers which
implement clocks or timers need this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: 1376065080-26661-3-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target-arm/cpu.h')
| -rw-r--r-- | target-arm/cpu.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index dffeec7455..c2cb534dc7 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -472,6 +472,9 @@ static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid) * old must have the OVERRIDE bit set. * NO_MIGRATE indicates that this register should be ignored for migration; * (eg because any state is accessed via some other coprocessor register). + * IO indicates that this register does I/O and therefore its accesses + * need to be surrounded by gen_io_start()/gen_io_end(). In particular, + * registers which implement clocks or timers require this. */ #define ARM_CP_SPECIAL 1 #define ARM_CP_CONST 2 @@ -479,13 +482,14 @@ static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid) #define ARM_CP_SUPPRESS_TB_END 8 #define ARM_CP_OVERRIDE 16 #define ARM_CP_NO_MIGRATE 32 +#define ARM_CP_IO 64 #define ARM_CP_NOP (ARM_CP_SPECIAL | (1 << 8)) #define ARM_CP_WFI (ARM_CP_SPECIAL | (2 << 8)) #define ARM_LAST_SPECIAL ARM_CP_WFI /* Used only as a terminator for ARMCPRegInfo lists */ #define ARM_CP_SENTINEL 0xffff /* Mask of only the flag bits in a type field */ -#define ARM_CP_FLAG_MASK 0x3f +#define ARM_CP_FLAG_MASK 0x7f /* Return true if cptype is a valid type field. This is used to try to * catch errors where the sentinel has been accidentally left off the end |