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target-arm: Implement AArch64 view of CPACR

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Implement the AArch64 view of the CPACR. The AArch64
CPACR is defined to have a lot of RES0 bits, but since
the architecture defines that RES0 bits may be implemented
as reads-as-written and we know that a v8 CPU will have
no registered coprocessors for cp0..cp13 we can safely
implement the whole register this way.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
This commit is contained in:
Peter Maydell 2014-02-26 17:20:06 +00:00
parent 9cfa0b4e4c
commit 34222fb810
2 changed files with 3 additions and 2 deletions
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2
target-arm/cpu.h
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@ -172,7 +172,7 @@ typedef struct CPUARMState {
uint32_t c0_cpuid;
uint64_t c0_cssel; /* Cache size selection. */
uint64_t c1_sys; /* System control register. */
uint32_t c1_coproc; /* Coprocessor access register. */
uint64_t c1_coproc; /* Coprocessor access register. */
uint32_t c1_xscaleauxcr; /* XScale auxiliary control register. */
uint32_t c1_scr; /* secure config register. */
uint64_t ttbr0_el1; /* MMU translation table base 0. */

3
target-arm/helper.c
View File

@ -458,7 +458,8 @@ static const ARMCPRegInfo v6_cp_reginfo[] = {
*/
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
{ .name = "CPACR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
{ .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
.crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_coproc),
.resetvalue = 0, .writefn = cpacr_write },
REGINFO_SENTINEL