psl1ght
A free SDK for Sony's PS3 console
|
SPU management syscalls. More...
Go to the source code of this file.
Data Structures | |
struct | _sys_spu_thread_arg |
A structure containing the arguments passed to the SPU main function. More... | |
struct | _sys_spu_thread_attr |
A structure containing SPU thread attributes. More... | |
struct | _sys_spu_thread_group_attr |
A structure containing SPU thread group attributes. More... | |
Macros | |
#define | MFC_LSA 0x3004 |
local store address | |
#define | MFC_EAH 0x3008 |
effective address high | |
#define | MFC_EAL 0x300C |
effective address low | |
#define | MFC_Size 0x3010 |
size of MFC DMA transfer | |
#define | MFC_Class_CMD 0x3014 |
class of MFC command | |
#define | MFC_CMD_Status 0x3014 |
MFC command status. | |
#define | MFC_QStatus 0x3104 |
MFC query status. | |
#define | Prxy_QueryType 0x3204 |
Proxy query type. | |
#define | Prxy_QueryMask 0x321C |
Proxy Query mask. | |
#define | Prxy_TagStatus 0x322C |
Proxy tag status. | |
#define | SPU_Out_MBox 0x4004 |
Outbound mailbox. | |
#define | SPU_In_MBox 0x400C |
Inbound mailbox. | |
#define | SPU_MBox_Status 0x4014 |
Outbound mailbox status. | |
#define | SPU_RunCtrl 0x401C |
SPU Run control. | |
#define | SPU_Status 0x4024 |
SPU status. | |
#define | SPU_NextPC 0x4034 |
SPU next PC. | |
#define | SPU_Sig_Notify_1 0x1400C |
Signal notification 1. | |
#define | SPU_Sig_Notify_2 0x1C00C |
Signal notification 2. | |
#define | SPU_THREAD_ATTR_NONE 0x00 |
No thread attributes. | |
#define | SPU_THREAD_ATTR_ASYNC_INT_ENABLE 0x01 |
Enables interrupts. | |
#define | SPU_THREAD_ATTR_DEC_SYNC_TB_ENABLE 0x02 |
Synchronize SPU decrementer with PPU time base. | |
#define | SPU_THREAD_EVENT_USER 0x01 |
User SPU thread event. | |
#define | SPU_THREAD_EVENT_DMA 0x02 |
DMA SPU thread event. | |
#define | SPU_THREAD_EVENT_USER_KEY 0xFFFFFFFF53505501ULL |
SPU thread event user key. | |
#define | SPU_THREAD_EVENT_DMA_KEY 0xFFFFFFFF53505502ULL |
SPU thread event DMA key. | |
#define | SPU_SIGNAL1_OVERWRITE 0x00 |
Configure signal notification register 1 to overwrite mode. | |
#define | SPU_SIGNAL1_OR 0x01 |
Configure signal notification register 1 to OR mode. | |
#define | SPU_SIGNAL2_OVERWRITE 0x00 |
Configure signal notification register 2 to overwrite mode. | |
#define | SPU_SIGNAL2_OR 0x02 |
Configure signal notification register 2 to OR mode. | |
#define | SPU_THREAD_BASE 0xF0000000ULL |
Base of memory-mapped SPU thread resources. | |
#define | SPU_THREAD_OFFSET 0x00100000ULL |
Offset between resources for consecutive SPU threads. | |
#define | SPU_RAW_BASE 0xE0000000ULL |
Base of memory-mapped raw SPU program resources. | |
#define | SPU_RAW_OFFSET 0x00100000ULL |
Offset between resources for consecutive raw SPU programs. | |
#define | SPU_LOCAL_OFFSET 0x00000000ULL |
Offset from the beginning of a SPU thread/raw program's resources for local store memory. | |
#define | SPU_PROBLEM_OFFSET 0x00040000ULL |
Offset from the beginning of a SPU thread/raw program's resources for IO registers. | |
#define | SPU_RAW_GET_BASE_OFFSET(spu) (SPU_RAW_BASE + (SPU_RAW_OFFSET*(spu))) |
Get base offset for a raw SPU program. More... | |
#define | SPU_RAW_GET_LOCAL_STORAGE(spu, reg) (SPU_RAW_GET_BASE_OFFSET(spu) + SPU_LOCAL_OFFSET + (reg)) |
Returns the memory-mapped address of local storage of a raw SPU. | |
#define | SPU_RAW_GET_PROBLEM_STORAGE(spu, reg) (SPU_RAW_GET_BASE_OFFSET(spu) + SPU_PROBLEM_OFFSET + (reg)) |
Returns the memory-mapped address of problem storage of a raw SPU. | |
#define | SPU_THREAD_GET_BASE_OFFSET(spu) (SPU_THREAD_BASE + (SPU_THREAD_OFFSET*(spu))) |
Get base offset for a SPU thread. More... | |
#define | SPU_THREAD_GET_LOCAL_STORAGE(spu, reg) (SPU_THREAD_GET_BASE_OFFSET(spu) + SPU_LOCAL_OFFSET + (reg)) |
Returns the memory-mapped address of local storage of a SPU thread. | |
#define | SPU_THREAD_GET_PROBLEM_STORAGE(spu, reg) (SPU_THREAD_GET_BASE_OFFSET(spu) + SPU_PROBLEM_OFFSET + (reg)) |
Returns the memory-mapped address of problem storage of a SPU thread. | |
Typedefs | |
typedef struct _sys_spu_thread_arg | sysSpuThreadArgument |
A structure containing the arguments passed to the SPU main function. | |
typedef struct _sys_spu_thread_attr | sysSpuThreadAttribute |
A structure containing SPU thread attributes. More... | |
typedef struct _sys_spu_thread_group_attr | sysSpuThreadGroupAttribute |
A structure containing SPU thread group attributes. | |
Functions | |
LV2_SYSCALL | sysSpuInitialize (u32 spus, u32 rawspus) |
Initialize the SPU management. More... | |
LV2_SYSCALL | sysSpuRawCreate (sys_raw_spu_t *spu, u32 *attributes) |
Allocate a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawDestroy (sys_raw_spu_t spu) |
De-allocate a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawCreateInterrupTag (sys_raw_spu_t spu, u32 classid, u32 hardwarethread, u32 *tag) |
Create an interrupt tag for a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawSetIntMask (sys_raw_spu_t spu, u32 classid, u64 mask) |
Set the value of the interrupt mask register for a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawGetIntMask (sys_raw_spu_t spu, u32 classid, u64 *mask) |
Get the value of the interrupt mask register for a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawSetIntStat (sys_raw_spu_t spu, u32 classid, u64 stat) |
Set the value of the interrupt status register for a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawGetIntStat (sys_raw_spu_t spu, u32 classid, u64 *stat) |
Get the value of the interrupt status register for a raw SPU. More... | |
LV2_SYSCALL | sysSpuRawReadPuintMb (sys_raw_spu_t spu, u32 *value) |
Read from the raw SPU's outbound interrupt mailbox register. More... | |
LV2_SYSCALL | sysSpuRawSetConfiguration (sys_raw_spu_t spu, u32 value) |
Configure the raw SPU's signal notification. More... | |
LV2_SYSCALL | sysSpuRawGetConfirugation (sys_raw_spu_t spu, u32 *value) |
Get the configuration of the raw SPU's signal notification. More... | |
LV2_SYSCALL | sysSpuRawRecoverPageFault (sys_raw_spu_t spu) |
Recover a raw SPU from a page fault. More... | |
LV2_SYSCALL | sysSpuImageOpen (sysSpuImage *image, const char *path) |
Create a SPU image from an ELF file. More... | |
LV2_SYSCALL | sysSpuImageOpenFd (sysSpuImage *image, s32 fd, u64 offset) |
Create a SPU image from an open binary file. More... | |
LV2_SYSCALL | sysSpuThreadInitialize (sys_spu_thread_t *thread, sys_spu_group_t group, u32 spu, sysSpuImage *image, sysSpuThreadAttribute *attributes, sysSpuThreadArgument *arguments) |
Initialize a SPU thread. More... | |
LV2_SYSCALL | sysSpuThreadSetArguments (sys_spu_thread_t thread, sysSpuThreadArgument *arguments) |
Set the SPU thread arguments. More... | |
LV2_SYSCALL | sysSpuThreadGetExitStatus (sys_spu_thread_t thread, s32 *status) |
Get the exit status of a thread. More... | |
LV2_SYSCALL | sysSpuThreadConnectEvent (sys_spu_thread_t thread, sys_event_queue_t queue, u32 type, u8 spup) |
Connect an event queue to a SPU thread. More... | |
LV2_SYSCALL | sysSpuThreadDisconnectEvent (sys_spu_thread_t thread, u32 type, u8 spup) |
Disconnect an event queue from a SPU thread. More... | |
LV2_SYSCALL | sysSpuThreadBindQueue (sys_spu_thread_t thread, sys_event_queue_t queue, u32 spuq_num) |
Bind an event queue to a SPU thread. More... | |
LV2_SYSCALL | sysSpuThreadUnbindQueue (sys_spu_thread_t thread, u32 spuq_num) |
Unbind an event queue from a SPU thread. More... | |
LV2_SYSCALL | sysSpuThreadWriteLocalStorage (sys_spu_thread_t thread, u32 address, u64 value, u32 type) |
Write a value to a SPU thread's local store memory. More... | |
LV2_SYSCALL | sysSpuThreadReadLocalStorage (sys_spu_thread_t thread, u32 address, u64 *value, u32 type) |
Read a value From the SPU thread's local store memory. More... | |
LV2_SYSCALL | sysSpuThreadWriteSignal (sys_spu_thread_t thread, u32 signal, u32 value) |
Write to the SPU thread's signal notification register. More... | |
LV2_SYSCALL | sysSpuThreadSetConfiguration (sys_spu_thread_t thread, u64 value) |
Configure the SPU thread's signal notification. More... | |
LV2_SYSCALL | sysSpuThreadGetConfiguration (sys_spu_thread_t thread, u64 *value) |
Get the configuration of the SPU thread's signal notification. More... | |
LV2_SYSCALL | sysSpuThreadWriteMb (sys_spu_thread_t thread, u32 value) |
Write to the SPU thread's inbound mailbox register. More... | |
LV2_SYSCALL | sysSpuThreadRecoverPageFault (sys_spu_thread_t thread) |
Recover from a SPU thread page fault. More... | |
LV2_SYSCALL | sysSpuThreadGroupCreate (sys_spu_group_t *group, u32 num, u32 prio, sysSpuThreadGroupAttribute *attr) |
Create a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupDestroy (sys_spu_group_t group) |
Destroy a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupStart (sys_spu_group_t group) |
Start a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupSuspend (sys_spu_group_t group) |
Suspend a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupResume (sys_spu_group_t group) |
Resume a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupYield (sys_spu_group_t group) |
Yield a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupTerminate (sys_spu_group_t group, u32 value) |
Terminate a SPU thread group. More... | |
LV2_SYSCALL | sysSpuThreadGroupJoin (sys_spu_group_t group, u32 *cause, u32 *status) |
Wait for a SPU thread group to finish its execution. More... | |
LV2_SYSCALL | sysSpuThreadGroupSetPriority (sys_spu_group_t group, u32 prio) |
Set a SPU thread group's priority. More... | |
LV2_SYSCALL | sysSpuThreadGroupGetPriority (sys_spu_group_t group, u32 *prio) |
Get a SPU thread group's priority. More... | |
LV2_SYSCALL | sysSpuThreadGroupConnectEvent (sys_spu_group_t group, sys_event_queue_t eventQ, u32 eventType) |
LV2_SYSCALL | sysSpuThreadGroupDisconnectEvent (sys_spu_group_t group, u32 eventType) |
LV2_SYSCALL | sysSpuThreadGroupConnectEventAllThreads (sys_spu_group_t group, sys_event_queue_t eventQ, u64 req, u8 *spup) |
LV2_SYSCALL | sysSpuThreadGroupDisonnectEventAllThreads (sys_spu_group_t group, u8 spup) |
static void | sysSpuRawWriteProblemStorage (sys_raw_spu_t spu, u32 reg, u32 value) |
static u32 | sysSpuRawReadProblemStorage (sys_raw_spu_t spu, u32 reg) |
static void | sysSpuRawWriteLocalStorage (sys_raw_spu_t spu, u32 reg, u32 value) |
static u32 | sysSpuRawReadLocalStorage (sys_raw_spu_t spu, u32 reg) |
static void | sysSpuThreadWriteProblemStorage (sys_raw_spu_t spu, u32 reg, u32 value) |
static u32 | sysSpuThreadReadProblemStorage (sys_raw_spu_t spu, u32 reg) |
SPU management syscalls.
These are the LV2 syscalls for SPU management (raw SPUs and SPU threads).
#define SPU_RAW_GET_BASE_OFFSET | ( | spu | ) | (SPU_RAW_BASE + (SPU_RAW_OFFSET*(spu))) |
Get base offset for a raw SPU program.
spu | SPU number (0-5) |
#define SPU_THREAD_GET_BASE_OFFSET | ( | spu | ) | (SPU_THREAD_BASE + (SPU_THREAD_OFFSET*(spu))) |
Get base offset for a SPU thread.
spu | SPU thread id |
typedef struct _sys_spu_thread_attr sysSpuThreadAttribute |
A structure containing SPU thread attributes.
Possible values for attribute
flags are SPU_THREAD_ATTR_NONE or an OR'ed list of the following flags:
LV2_SYSCALL sysSpuImageOpen | ( | sysSpuImage * | image, |
const char * | path | ||
) |
Create a SPU image from an ELF file.
image | Pointer to the SPU image structure. |
path | The pathname of the ELF file to be read from. |
LV2_SYSCALL sysSpuImageOpenFd | ( | sysSpuImage * | image, |
s32 | fd, | ||
u64 | offset | ||
) |
Create a SPU image from an open binary file.
image | Pointer to the SPU image structure. |
fd | File descriptor of the opened file. |
offset | Offset to the beginning of the SPU image in the file. |
LV2_SYSCALL sysSpuInitialize | ( | u32 | spus, |
u32 | rawspus | ||
) |
Initialize the SPU management.
spus | Total number of needed SPUs (from 1 to 6). |
rawspus | Number of required raw SPUs (from 1 to 5). |
LV2_SYSCALL sysSpuRawCreate | ( | sys_raw_spu_t * | spu, |
u32 * | attributes | ||
) |
Allocate a raw SPU.
spu | Pointer to a returned raw SPU identifier. |
attributes | Pointer to an attributes structure (or NULL if default attributes are used). |
LV2_SYSCALL sysSpuRawCreateInterrupTag | ( | sys_raw_spu_t | spu, |
u32 | classid, | ||
u32 | hardwarethread, | ||
u32 * | tag | ||
) |
Create an interrupt tag for a raw SPU.
spu | The raw SPU identifier. |
classid | The interrupt class identifier. |
hardwarethread | The hardware thread identifier. |
tag | Pointer to the returned interrupt tag identifier. |
LV2_SYSCALL sysSpuRawDestroy | ( | sys_raw_spu_t | spu | ) |
De-allocate a raw SPU.
spu | The raw SPU identifier. |
LV2_SYSCALL sysSpuRawGetConfirugation | ( | sys_raw_spu_t | spu, |
u32 * | value | ||
) |
Get the configuration of the raw SPU's signal notification.
spu | The raw SPU identifier. |
value | Pointer to the read configuration value, which is a OR combination of the following values: |
LV2_SYSCALL sysSpuRawGetIntMask | ( | sys_raw_spu_t | spu, |
u32 | classid, | ||
u64 * | mask | ||
) |
Get the value of the interrupt mask register for a raw SPU.
spu | The raw SPU identifier. |
classid | The interrupt class identifier. |
mask | Pointer to the returned interrupt mask register value. |
LV2_SYSCALL sysSpuRawGetIntStat | ( | sys_raw_spu_t | spu, |
u32 | classid, | ||
u64 * | stat | ||
) |
Get the value of the interrupt status register for a raw SPU.
spu | The raw SPU identifier. |
classid | The interrupt class identifier. |
mask | Pointer to the returned interrupt status register value. |
LV2_SYSCALL sysSpuRawReadPuintMb | ( | sys_raw_spu_t | spu, |
u32 * | value | ||
) |
Read from the raw SPU's outbound interrupt mailbox register.
spu | The raw SPU identifier. |
value | Pointer to the read value. |
LV2_SYSCALL sysSpuRawRecoverPageFault | ( | sys_raw_spu_t | spu | ) |
Recover a raw SPU from a page fault.
spu | The raw SPU identifier. |
LV2_SYSCALL sysSpuRawSetConfiguration | ( | sys_raw_spu_t | spu, |
u32 | value | ||
) |
Configure the raw SPU's signal notification.
spu | The raw SPU identifier. |
value | A OR combination of the following values: |
LV2_SYSCALL sysSpuRawSetIntMask | ( | sys_raw_spu_t | spu, |
u32 | classid, | ||
u64 | mask | ||
) |
Set the value of the interrupt mask register for a raw SPU.
spu | The raw SPU identifier. |
classid | The interrupt class identifier. |
mask | The new interrupt mask register value. |
LV2_SYSCALL sysSpuRawSetIntStat | ( | sys_raw_spu_t | spu, |
u32 | classid, | ||
u64 | stat | ||
) |
Set the value of the interrupt status register for a raw SPU.
spu | The raw SPU identifier. |
classid | The interrupt class identifier. |
mask | The new interrupt status register value. |
LV2_SYSCALL sysSpuThreadBindQueue | ( | sys_spu_thread_t | thread, |
sys_event_queue_t | queue, | ||
u32 | spuq_num | ||
) |
Bind an event queue to a SPU thread.
thread | Thread identifier. |
queue | Event queue identifier. |
spuq_num | Event queue binding id. |
LV2_SYSCALL sysSpuThreadConnectEvent | ( | sys_spu_thread_t | thread, |
sys_event_queue_t | queue, | ||
u32 | type, | ||
u8 | spup | ||
) |
Connect an event queue to a SPU thread.
thread | Thread identifier. |
queue | Event queue identifier. |
type | Event queue type. Possible values are: |
spup | SPU event port number (value in 0..63 interval). |
LV2_SYSCALL sysSpuThreadDisconnectEvent | ( | sys_spu_thread_t | thread, |
u32 | type, | ||
u8 | spup | ||
) |
Disconnect an event queue from a SPU thread.
thread | Thread identifier. |
type | Event queue type. Possible values are: |
spup | SPU event port number. |
LV2_SYSCALL sysSpuThreadGetConfiguration | ( | sys_spu_thread_t | thread, |
u64 * | value | ||
) |
Get the configuration of the SPU thread's signal notification.
thread | Thread identifier. |
value | Pointer to the read configuration value, which is a OR combination of the following values: |
LV2_SYSCALL sysSpuThreadGetExitStatus | ( | sys_spu_thread_t | thread, |
s32 * | status | ||
) |
Get the exit status of a thread.
The exit status is the value the SPU program used as an argument to spu_thread_exit.
thread | Thread identifier. |
arguments | Pointer to the returned exit status. |
LV2_SYSCALL sysSpuThreadGroupCreate | ( | sys_spu_group_t * | group, |
u32 | num, | ||
u32 | prio, | ||
sysSpuThreadGroupAttribute * | attr | ||
) |
Create a SPU thread group.
group | Pointer to the returned SPU thread group identifier. |
num | Number of SPU threads in the thread group. |
prio | Priority of the thread group. |
attr | Pointer to a SPU thread group attribute structure. |
LV2_SYSCALL sysSpuThreadGroupDestroy | ( | sys_spu_group_t | group | ) |
Destroy a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadGroupGetPriority | ( | sys_spu_group_t | group, |
u32 * | prio | ||
) |
Get a SPU thread group's priority.
group | SPU thread group identifier. |
prio | Pointer to returned priority value. |
LV2_SYSCALL sysSpuThreadGroupJoin | ( | sys_spu_group_t | group, |
u32 * | cause, | ||
u32 * | status | ||
) |
Wait for a SPU thread group to finish its execution.
group | SPU thread group identifier. |
cause | Pointer to returned cause of thread group termination. |
status | Pointer to returned status of thread group termination. |
LV2_SYSCALL sysSpuThreadGroupResume | ( | sys_spu_group_t | group | ) |
Resume a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadGroupSetPriority | ( | sys_spu_group_t | group, |
u32 | prio | ||
) |
Set a SPU thread group's priority.
group | SPU thread group identifier. |
prio | New priority value. |
LV2_SYSCALL sysSpuThreadGroupStart | ( | sys_spu_group_t | group | ) |
Start a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadGroupSuspend | ( | sys_spu_group_t | group | ) |
Suspend a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadGroupTerminate | ( | sys_spu_group_t | group, |
u32 | value | ||
) |
Terminate a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadGroupYield | ( | sys_spu_group_t | group | ) |
Yield a SPU thread group.
group | SPU thread group identifier. |
LV2_SYSCALL sysSpuThreadInitialize | ( | sys_spu_thread_t * | thread, |
sys_spu_group_t | group, | ||
u32 | spu, | ||
sysSpuImage * | image, | ||
sysSpuThreadAttribute * | attributes, | ||
sysSpuThreadArgument * | arguments | ||
) |
Initialize a SPU thread.
thread | Pointer to the returned thread identifier. |
group | Group identifier. |
spu | Index of thread in group (from 0 to the thread group size minus 1). |
image | Pointer to the SPU image structure. |
attributes | Pointer to a SPU thread attribute structure. |
arguments | Pointer to the arguments for the thread's main function. |
LV2_SYSCALL sysSpuThreadReadLocalStorage | ( | sys_spu_thread_t | thread, |
u32 | address, | ||
u64 * | value, | ||
u32 | type | ||
) |
Read a value From the SPU thread's local store memory.
thread | Thread identifier. |
address | Address in local store to read from. |
value | Pointer to read value. |
type | Type of value to be read. |
LV2_SYSCALL sysSpuThreadRecoverPageFault | ( | sys_spu_thread_t | thread | ) |
Recover from a SPU thread page fault.
thread | Thread identifier. |
LV2_SYSCALL sysSpuThreadSetArguments | ( | sys_spu_thread_t | thread, |
sysSpuThreadArgument * | arguments | ||
) |
Set the SPU thread arguments.
thread | Thread identifier. |
arguments | Pointer to the arguments list. |
LV2_SYSCALL sysSpuThreadSetConfiguration | ( | sys_spu_thread_t | thread, |
u64 | value | ||
) |
Configure the SPU thread's signal notification.
thread | Thread identifier. |
value | A OR combination of the following values: |
LV2_SYSCALL sysSpuThreadUnbindQueue | ( | sys_spu_thread_t | thread, |
u32 | spuq_num | ||
) |
Unbind an event queue from a SPU thread.
thread | Thread identifier. |
spuq_num | Event queue binding id. |
LV2_SYSCALL sysSpuThreadWriteLocalStorage | ( | sys_spu_thread_t | thread, |
u32 | address, | ||
u64 | value, | ||
u32 | type | ||
) |
Write a value to a SPU thread's local store memory.
thread | Thread identifier. |
address | Address in local store to write to. |
value | Value to be written. |
type | Type of value to be written. |
LV2_SYSCALL sysSpuThreadWriteMb | ( | sys_spu_thread_t | thread, |
u32 | value | ||
) |
Write to the SPU thread's inbound mailbox register.
thread | Thread identifier. |
value | Value to be written. |
LV2_SYSCALL sysSpuThreadWriteSignal | ( | sys_spu_thread_t | thread, |
u32 | signal, | ||
u32 | value | ||
) |
Write to the SPU thread's signal notification register.
thread | Thread identifier. |
signal |
|
value | Value to be written. |