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Re: [Qemu-devel] [PATCH v3 06/16] register: QOMify
From: |
Alistair Francis |
Subject: |
Re: [Qemu-devel] [PATCH v3 06/16] register: QOMify |
Date: |
Tue, 9 Feb 2016 10:09:25 -0800 |
On Tue, Feb 9, 2016 at 3:49 AM, Alex Bennée <address@hidden> wrote:
>
> Alistair Francis <address@hidden> writes:
>
>> From: Peter Crosthwaite <address@hidden>
>>
>> QOMify registers as a child of TYPE_DEVICE. This allows registers to
>> define GPIOs.
>>
>> Define an init helper that will do QOM initialisation as well as setup
>> the r/w fast paths.
>
> I don't know if there has been bit-rot since posting but this currently
> doesn't build:
>
> CC hw/core/register.o
> hw/core/register.c:394:1: error: return type defaults to ‘int’
> [-Werror=return-type]
> type_init(register_register_types)
> ^
> hw/core/register.c:394:1: error: function declaration isn’t a prototype
> [-Werror=strict-prototypes]
> hw/core/register.c: In function ‘type_init’:
> hw/core/register.c:394:1: error: old-style function definition
> [-Werror=old-style-definition]
> hw/core/register.c:394:1: error: expected ‘{’ at end of input
> hw/core/register.c: At top level:
> hw/core/register.c:389:13: error: ‘register_register_types’ defined but not
> used [-Werror=unused-function]
> static void register_register_types(void)
> ^
> hw/core/register.c: In function ‘type_init’:
> hw/core/register.c:394:1: error: control reaches end of non-void function
> [-Werror=return-type]
> type_init(register_register_types)
> ^
> cc1: all warnings being treated as errors
> make: *** [hw/core/register.o] Error 1
> make: Target `all' not remade because of errors.
Yeah there appears to have been some changes with include files.
Thanks for pointing it out, fixed in V4.
Thanks,
Alistair
>
>
>>
>> Signed-off-by: Peter Crosthwaite <address@hidden>
>> Signed-off-by: Alistair Francis <address@hidden>
>> Reviewed-by: KONRAD Frederic <address@hidden>
>> ---
>>
>> hw/core/register.c | 34 ++++++++++++++++++++++++++++++++++
>> include/hw/register.h | 14 ++++++++++++++
>> 2 files changed, 48 insertions(+)
>>
>> diff --git a/hw/core/register.c b/hw/core/register.c
>> index e696c43..939f398 100644
>> --- a/hw/core/register.c
>> +++ b/hw/core/register.c
>> @@ -188,6 +188,28 @@ void register_reset(RegisterInfo *reg)
>> register_write_val(reg, reg->access->reset);
>> }
>>
>> +void register_init(RegisterInfo *reg)
>> +{
>> + assert(reg);
>> + const RegisterAccessInfo *ac;
>> +
>> + if (!reg->data || !reg->access) {
>> + return;
>> + }
>> +
>> + object_initialize((void *)reg, sizeof(*reg), TYPE_REGISTER);
>> +
>> + ac = reg->access;
>> +
>> + /* if there are no debug msgs and no RMW requirement, mark for fast
>> write */
>> + reg->write_lite = reg->debug || ac->ro || ac->w1c || ac->pre_write ||
>> + ((ac->ge0 || ac->ge1) && qemu_loglevel_mask(LOG_GUEST_ERROR)) ||
>> + ((ac->ui0 || ac->ui1) && qemu_loglevel_mask(LOG_UNIMP))
>> + ? false : true;
>> + /* no debug and no clear-on-read is a fast read */
>> + reg->read_lite = reg->debug || ac->cor ? false : true;
>> +}
>> +
>> static inline void register_write_memory(void *opaque, hwaddr addr,
>> uint64_t value, unsigned size,
>> bool be)
>> {
>> @@ -235,3 +257,15 @@ uint64_t register_read_memory_le(void *opaque, hwaddr
>> addr, unsigned size)
>> {
>> return register_read_memory(opaque, addr, size, false);
>> }
>> +
>> +static const TypeInfo register_info = {
>> + .name = TYPE_REGISTER,
>> + .parent = TYPE_DEVICE,
>> +};
>> +
>> +static void register_register_types(void)
>> +{
>> + type_register_static(®ister_info);
>> +}
>> +
>> +type_init(register_register_types)
>> diff --git a/include/hw/register.h b/include/hw/register.h
>> index 38ee6f5..3316458 100644
>> --- a/include/hw/register.h
>> +++ b/include/hw/register.h
>> @@ -11,6 +11,7 @@
>> #ifndef REGISTER_H
>> #define REGISTER_H
>>
>> +#include "hw/qdev-core.h"
>> #include "exec/memory.h"
>>
>> typedef struct RegisterInfo RegisterInfo;
>> @@ -101,6 +102,8 @@ struct RegisterAccessInfo {
>>
>> struct RegisterInfo {
>> /* <private> */
>> + DeviceState parent_obj;
>> +
>> bool read_lite;
>> bool write_lite;
>>
>> @@ -118,6 +121,9 @@ struct RegisterInfo {
>> void *opaque;
>> };
>>
>> +#define TYPE_REGISTER "qemu,register"
>> +#define REGISTER(obj) OBJECT_CHECK(RegisterInfo, (obj), TYPE_REGISTER)
>> +
>> /**
>> * write a value to a register, subject to its restrictions
>> * @reg: register to write to
>> @@ -143,6 +149,14 @@ uint64_t register_read(RegisterInfo *reg);
>> void register_reset(RegisterInfo *reg);
>>
>> /**
>> + * Initialize a register. GPIO's are setup as IOs to the specified device.
>> + * Fast paths for eligible registers are enabled.
>> + * @reg: Register to initialize
>> + */
>> +
>> +void register_init(RegisterInfo *reg);
>> +
>> +/**
>> * Memory API MMIO write handler that will write to a Register API register.
>> * _be for big endian variant and _le for little endian.
>> * @opaque: RegisterInfo to write to
>
>
> --
> Alex Bennée
>