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***********************license end**************************************/
/**
* @file
*
* Provides APIs for applications to register for hotplug. It also provides
* APIs for requesting shutdown of a running target application.
*
* <hr>$Revision: $<hr>
*/
#include "cvmx-app-hotplug.h"
#include "cvmx-spinlock.h"
#include "cvmx-debug.h"
//#define DEBUG 1
static cvmx_app_hotplug_global_t *hotplug_global_ptr = 0;
#ifndef CVMX_BUILD_FOR_LINUX_USER
static CVMX_SHARED cvmx_spinlock_t cvmx_app_hotplug_sync_lock = { CVMX_SPINLOCK_UNLOCKED_VAL };
static CVMX_SHARED cvmx_spinlock_t cvmx_app_hotplug_lock = { CVMX_SPINLOCK_UNLOCKED_VAL };
static CVMX_SHARED cvmx_app_hotplug_info_t *cvmx_app_hotplug_info_ptr = NULL;
static void __cvmx_app_hotplug_shutdown(int irq_number, uint64_t registers[32], void *user_arg);
static void __cvmx_app_hotplug_sync(void);
static void __cvmx_app_hotplug_reset(void);
/* Declaring this array here is a compile time check to ensure that the
size of cvmx_app_hotplug_info_t is 1024. If the size is not 1024
the size of the array will be -1 and this results in a compilation
error */
char __hotplug_info_check[(sizeof(cvmx_app_hotplug_info_t) == 1024) ? 1 : -1];
/**
* This routine registers an application for hotplug. It installs a handler for
* any incoming shutdown request. It also registers a callback routine from the
* application. This callback is invoked when the application receives a
* shutdown notification.
*
* This routine only needs to be called once per application.
*
* @param fn Callback routine from the application.
* @param arg Argument to the application callback routine.
* @return Return 0 on success, -1 on failure
*
*/
int cvmx_app_hotplug_register(void(*fn)(void*), void* arg)
{
/* Find the list of applications launched by bootoct utility. */
if (!(cvmx_app_hotplug_info_ptr = cvmx_app_hotplug_get_info(cvmx_sysinfo_get()->core_mask)))
{
/* Application not launched by bootoct? */
printf("ERROR: cmvx_app_hotplug_register() failed\n");
return -1;
}
/* Register the callback */
cvmx_app_hotplug_info_ptr->data = CAST64(arg);
cvmx_app_hotplug_info_ptr->shutdown_callback = CAST64(fn);
#ifdef DEBUG
printf("cvmx_app_hotplug_register(): coremask 0x%x valid %d\n",
cvmx_app_hotplug_info_ptr->coremask, cvmx_app_hotplug_info_ptr->valid);
#endif
cvmx_interrupt_register(CVMX_IRQ_MBOX0, __cvmx_app_hotplug_shutdown, NULL);
return 0;
}
/**
* This routine deprecates the the cvmx_app_hotplug_register method. This
* registers application for hotplug and the application will have CPU
* hotplug callbacks. Various callbacks are specified in cb.
* cvmx_app_hotplug_callbacks_t documents the callbacks
*
* This routine only needs to be called once per application.
*
* @param cb Callback routine from the application.
* @param arg Argument to the application callback routins
* @param app_shutdown When set to 1 the application will invoke core_shutdown
on each core. When set to 0 core shutdown will be
called invoked automatically after invoking the
application callback.
* @return Return index of app on success, -1 on failure
*
*/
int cvmx_app_hotplug_register_cb(cvmx_app_hotplug_callbacks_t *cb, void* arg,
int app_shutdown)
{
cvmx_app_hotplug_info_t *app_info;
/* Find the list of applications launched by bootoct utility. */
app_info = cvmx_app_hotplug_get_info(cvmx_sysinfo_get()->core_mask);
cvmx_app_hotplug_info_ptr = app_info;
if (!app_info)
{
/* Application not launched by bootoct? */
printf("ERROR: cmvx_app_hotplug_register() failed\n");
return -1;
}
/* Register the callback */
app_info->data = CAST64(arg);
app_info->shutdown_callback = CAST64(cb->shutdown_callback);
app_info->cores_added_callback = CAST64(cb->cores_added_callback);
app_info->cores_removed_callback = CAST64(cb->cores_removed_callback);
app_info->unplug_callback = CAST64(cb->unplug_core_callback);
app_info->hotplug_start = CAST64(cb->hotplug_start);
app_info->app_shutdown = app_shutdown;
#ifdef DEBUG
printf("cvmx_app_hotplug_register(): coremask 0x%x valid %d\n",
app_info->coremask, app_info->valid);
#endif
cvmx_interrupt_register(CVMX_IRQ_MBOX0, __cvmx_app_hotplug_shutdown, NULL);
return 0;
}
void cvmx_app_hotplug_remove_self_from_core_mask(void)
{
int core = cvmx_get_core_num();
uint32_t core_mask = 1ull << core;
cvmx_spinlock_lock(&cvmx_app_hotplug_lock);
cvmx_app_hotplug_info_ptr->coremask = cvmx_app_hotplug_info_ptr->coremask & ~core_mask ;
cvmx_app_hotplug_info_ptr->hotplug_activated_coremask =
cvmx_app_hotplug_info_ptr->hotplug_activated_coremask & ~core_mask ;
cvmx_spinlock_unlock(&cvmx_app_hotplug_lock);
}
/**
* Returns 1 if the running core is being unplugged, else it returns 0.
*/
int is_core_being_unplugged(void)
{
if (cvmx_app_hotplug_info_ptr->unplug_cores &
(1ull << cvmx_get_core_num()))
return 1;
return 0;
}
/**
* Activate the current application core for receiving hotplug shutdown requests.
*
* This routine makes sure that each core belonging to the application is enabled
* to receive the shutdown notification and also provides a barrier sync to make
* sure that all cores are ready.
*/
int cvmx_app_hotplug_activate(void)
{
uint64_t cnt = 0;
uint64_t cnt_interval = 10000000;
while (!cvmx_app_hotplug_info_ptr)
{
cnt++;
if ((cnt % cnt_interval) == 0)
printf("waiting for cnt=%lld\n", (unsigned long long)cnt);
}
if (cvmx_app_hotplug_info_ptr->hplugged_cores & (1ull << cvmx_get_core_num()))
{
#ifdef DEBUG
printf("core=%d : is being hotplugged \n", cvmx_get_core_num());
#endif
cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
sys_info_ptr->core_mask |= 1ull << cvmx_get_core_num();
}
else
{
__cvmx_app_hotplug_sync();
}
cvmx_spinlock_lock(&cvmx_app_hotplug_lock);
if (!cvmx_app_hotplug_info_ptr)
{
cvmx_spinlock_unlock(&cvmx_app_hotplug_lock);
printf("ERROR: This application is not registered for hotplug\n");
return -1;
}
/* Enable the interrupt before we mark the core as activated */
cvmx_interrupt_unmask_irq(CVMX_IRQ_MBOX0);
cvmx_app_hotplug_info_ptr->hotplug_activated_coremask |= (1ull<<cvmx_get_core_num());
#ifdef DEBUG
printf("cvmx_app_hotplug_activate(): coremask 0x%x valid %d sizeof %d\n",
cvmx_app_hotplug_info_ptr->coremask, cvmx_app_hotplug_info_ptr->valid,
sizeof(*cvmx_app_hotplug_info_ptr));
#endif
cvmx_spinlock_unlock(&cvmx_app_hotplug_lock);
return 0;
}
/**
* This routine is only required if cvmx_app_hotplug_shutdown_request() was called
* with wait=0. This routine waits for the application shutdown to complete.
*
* @param coremask Coremask the application is running on.
* @return 0 on success, -1 on error
*
*/
int cvmx_app_hotplug_shutdown_complete(uint32_t coremask)
{
cvmx_app_hotplug_info_t *hotplug_info_ptr;
if (!(hotplug_info_ptr = cvmx_app_hotplug_get_info(coremask)))
{
printf("\nERROR: Failed to get hotplug info for coremask: 0x%x\n", (unsigned int)coremask);
return -1;
}
while(!hotplug_info_ptr->shutdown_done);
/* Clean up the hotplug info region for this app */
bzero(hotplug_info_ptr, sizeof(*hotplug_info_ptr));
return 0;
}
/**
* Disable recognition of any incoming shutdown request.
*/
void cvmx_app_hotplug_shutdown_disable(void)
{
cvmx_interrupt_mask_irq(CVMX_IRQ_MBOX0);
}
/**
* Re-enable recognition of incoming shutdown requests.
*/
void cvmx_app_hotplug_shutdown_enable(void)
{
cvmx_interrupt_unmask_irq(CVMX_IRQ_MBOX0);
}
/**
* Request shutdown of the currently running core. Should be
* called by the application when it has been registered with
* app_shutdown option set to 1.
*/
void cvmx_app_hotplug_core_shutdown(void)
{
uint32_t flags;
if (cvmx_app_hotplug_info_ptr->shutdown_cores)
{
cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
__cvmx_app_hotplug_sync();
if (cvmx_coremask_first_core(sys_info_ptr->core_mask))
{
bzero(cvmx_app_hotplug_info_ptr,
sizeof(*cvmx_app_hotplug_info_ptr));
#ifdef DEBUG
printf("__cvmx_app_hotplug_shutdown(): setting shutdown done! \n");
#endif
cvmx_app_hotplug_info_ptr->shutdown_done = 1;
}
/* Tell the debugger that this application is finishing. */
cvmx_debug_finish ();
flags = cvmx_interrupt_disable_save();
__cvmx_app_hotplug_sync();
/* Reset the core */
__cvmx_app_hotplug_reset();
}
else
{
cvmx_sysinfo_remove_self_from_core_mask();
cvmx_app_hotplug_remove_self_from_core_mask();
flags = cvmx_interrupt_disable_save();
__cvmx_app_hotplug_reset();
}
}
/*
* ISR for the incoming shutdown request interrupt.
*/
static void __cvmx_app_hotplug_shutdown(int irq_number, uint64_t registers[32],
void *user_arg)
{
cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
uint64_t mbox;
cvmx_app_hotplug_info_t *ai = cvmx_app_hotplug_info_ptr;
int dbg = 0;
#ifdef DEBUG
dbg = 1;
#endif
cvmx_interrupt_mask_irq(CVMX_IRQ_MBOX0);
mbox = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()));
/* Clear the interrupt */
cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), mbox);
/* Make sure the write above completes */
cvmx_read_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()));
if (!cvmx_app_hotplug_info_ptr)
{
printf("ERROR: Application is not registered for hotplug!\n");
return;
}
if (ai->hotplug_activated_coremask != sys_info_ptr->core_mask)
{
printf("ERROR: Shutdown requested when not all app cores have "
"activated hotplug\n" "Application coremask: 0x%x Hotplug "
"coremask: 0x%x\n", (unsigned int)sys_info_ptr->core_mask,
(unsigned int)ai->hotplug_activated_coremask);
return;
}
if (mbox & 1ull)
{
int core = cvmx_get_core_num();
if (dbg)
printf("Shutting down application .\n");
/* Call the application's own callback function */
if (ai->shutdown_callback)
{
((void(*)(void*))(long)ai->shutdown_callback)(CASTPTR(void *, ai->data));
}
else
{
printf("ERROR : Shutdown callback has not been registered\n");
}
if (!ai->app_shutdown)
{
if (dbg)
printf("%s : core = %d Invoking app shutdown\n", __FUNCTION__, core);
cvmx_app_hotplug_core_shutdown();
}
}
else if (mbox & 2ull)
{
int core = cvmx_get_core_num();
int unplug = is_core_being_unplugged();
if (dbg) printf("%s : core=%d Unplug event \n", __FUNCTION__, core);
if (unplug)
{
/* Call the application's own callback function */
if (ai->unplug_callback)
{
if (dbg) printf("%s : core=%d Calling unplug callback\n",
__FUNCTION__, core);
((void(*)(void*))(long)ai->unplug_callback)(CASTPTR(void *,
ai->data));
}
if (!ai->app_shutdown)
{
if (dbg) printf("%s : core = %d Invoking app shutdown\n",
__FUNCTION__, core);
cvmx_app_hotplug_core_shutdown();
}
}
else
{
if (ai->cores_removed_callback)
{
if (dbg) printf("%s : core=%d Calling cores removed callback\n",
__FUNCTION__, core);
((void(*)(uint32_t, void*))(long)ai->cores_removed_callback)
(ai->unplug_cores, CASTPTR(void *, ai->data));
}
cvmx_interrupt_unmask_irq(CVMX_IRQ_MBOX0);
}
}
else if (mbox & 4ull)
{
int core = cvmx_get_core_num();
if (dbg) printf("%s : core=%d Add cores event \n", __FUNCTION__, core);
if (ai->cores_added_callback)
{
if (dbg) printf("%s : core=%d Calling cores added callback\n",
__FUNCTION__, core);
((void(*)(uint32_t, void*))(long)ai->cores_added_callback)
(ai->hplugged_cores, CASTPTR(void *, ai->data));
}
cvmx_interrupt_unmask_irq(CVMX_IRQ_MBOX0);
}
else
{
printf("ERROR: unexpected mbox=%llx\n", (unsigned long long)mbox);
}
}
void __cvmx_app_hotplug_reset(void)
{
#define IDLE_CORE_BLOCK_NAME "idle-core-loop"
#define HPLUG_MAKE_XKPHYS(x) ((1ULL << 63) | (x))
uint64_t reset_addr;
const cvmx_bootmem_named_block_desc_t *block_desc;
block_desc = cvmx_bootmem_find_named_block(IDLE_CORE_BLOCK_NAME);
if (!block_desc) {
cvmx_dprintf("Named block(%s) is not created\n", IDLE_CORE_BLOCK_NAME);
/* loop here, should not happen */
__asm__ volatile (
".set noreorder \n"
"\tsync \n"
"\tnop \n"
"1:\twait \n"
"\tb 1b \n"
"\tnop \n"
".set reorder \n"
::
);
}
reset_addr = HPLUG_MAKE_XKPHYS(block_desc->base_addr);
asm volatile (" .set push \n"
" .set mips64 \n"
" .set noreorder \n"
" move $2, %[addr] \n"
" jr $2 \n"
" nop \n"
" .set pop "
:: [addr] "r"(reset_addr)
: "$2");
/*Should never reach here*/
while (1) ;
}
/*
* We need a separate sync operation from cvmx_coremask_barrier_sync() to
* avoid a deadlock on state.lock, since the application itself maybe doing a
* cvmx_coremask_barrier_sync().
*/
static void __cvmx_app_hotplug_sync(void)
{
static CVMX_SHARED volatile uint32_t sync_coremask = 0;
cvmx_sysinfo_t *sys_info_ptr = cvmx_sysinfo_get();
cvmx_spinlock_lock(&cvmx_app_hotplug_sync_lock);
sync_coremask |= cvmx_coremask_core(cvmx_get_core_num());
cvmx_spinlock_unlock(&cvmx_app_hotplug_sync_lock);
while (sync_coremask != sys_info_ptr->core_mask);
cvmx_spinlock_lock(&cvmx_app_hotplug_sync_lock);
sync_coremask = 0;
cvmx_spinlock_unlock(&cvmx_app_hotplug_sync_lock);
}
#endif /* CVMX_BUILD_FOR_LINUX_USER */
/**
* Returns 1 if the running core is being hotplugged, else it returns 0.
*/
int is_core_being_hot_plugged(void)
{
#ifndef CVMX_BUILD_FOR_LINUX_USER
if (!cvmx_app_hotplug_info_ptr) return 0;
if (cvmx_app_hotplug_info_ptr->hplugged_cores &
(1ull << cvmx_get_core_num()))
return 1;
return 0;
#else
return 0;
#endif
}
static cvmx_app_hotplug_global_t *cvmx_app_get_hotplug_global_ptr(void)
{
const struct cvmx_bootmem_named_block_desc *block_desc;
cvmx_app_hotplug_global_t *hgp;
if(hotplug_global_ptr != 0) return hotplug_global_ptr;
block_desc = cvmx_bootmem_find_named_block(CVMX_APP_HOTPLUG_INFO_REGION_NAME);
if (!block_desc)
{
printf("ERROR: Hotplug info region is not setup\n");
return NULL;
}
else
#ifdef CVMX_BUILD_FOR_LINUX_USER
{
size_t pg_sz = sysconf(_SC_PAGESIZE), size;
off_t offset;
char *vaddr;
int fd;
if ((fd = open("/dev/mem", O_RDWR)) == -1) {
perror("open");
return NULL;
}
/*
* We need to mmap() this memory, since this was allocated from the
* kernel bootup code and does not reside in the RESERVE32 region.
*/
size = CVMX_APP_HOTPLUG_INFO_REGION_SIZE + pg_sz-1;
offset = block_desc->base_addr & ~(pg_sz-1);
if ((vaddr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset))
== MAP_FAILED)
{
perror("mmap");
return NULL;
}
hgp = (cvmx_app_hotplug_global_t *)(vaddr + ( block_desc->base_addr & (pg_sz-1)));
}
#else
hgp = CASTPTR(void, CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, block_desc->base_addr));
#endif
hotplug_global_ptr = hgp;
return hgp;
}
/**
* Return the hotplug info structure (cvmx_app_hotplug_info_t) pointer for the
* application running on the given coremask.
*
* @param coremask Coremask of application.
* @return Returns hotplug info struct on success, NULL on failure
*
*/
cvmx_app_hotplug_info_t* cvmx_app_hotplug_get_info(uint32_t coremask)
{
cvmx_app_hotplug_info_t *hip;
cvmx_app_hotplug_global_t *hgp;
int i;
int dbg = 0;
#ifdef DEBUG
dbg = 1;
#endif
hgp = cvmx_app_get_hotplug_global_ptr();
if (!hgp) return NULL;
hip = hgp->hotplug_info_array;
/* Look for the current app's info */
for (i=0; i<CVMX_APP_HOTPLUG_MAX_APPS; i++)
{
if (hip[i].coremask == coremask)
{
if (dbg)
printf("cvmx_app_hotplug_get_info(): coremask match %d -- coremask 0x%x, valid %d\n", i, (unsigned int)hip[i].coremask, (unsigned int)hip[i].valid);
return &hip[i];
}
}
return NULL;
}
/**
* Return the hotplug application index structure for the application running on the
* given coremask.
*
* @param coremask Coremask of application.
* @return Returns hotplug application index on success. -1 on failure
*
*/
int cvmx_app_hotplug_get_index(uint32_t coremask)
{
cvmx_app_hotplug_info_t *hip;
cvmx_app_hotplug_global_t *hgp;
int i;
int dbg = 0;
#ifdef DEBUG
dbg = 1;
#endif
hgp = cvmx_app_get_hotplug_global_ptr();
if (!hgp) return -1;
hip = hgp->hotplug_info_array;
/* Look for the current app's info */
for (i=0; i<CVMX_APP_HOTPLUG_MAX_APPS; i++)
{
if (hip[i].coremask == coremask)
{
if (dbg)
printf("cvmx_app_hotplug_get_info(): coremask match %d -- coremask 0x%x valid %d\n", i, (unsigned int)hip[i].coremask, (unsigned int)hip[i].valid);
return i;
}
}
return -1;
}
void print_hot_plug_info(cvmx_app_hotplug_info_t* hpinfo)
{
printf("name=%s coremask=%08x hotplugged coremask=%08x valid=%d\n", hpinfo->app_name,
(unsigned int)hpinfo->coremask, (unsigned int)hpinfo->hotplug_activated_coremask, (unsigned int)hpinfo->valid);
}
/**
* Return the hotplug info structure (cvmx_app_hotplug_info_t) pointer for the
* application with the specified index.
*
* @param index index of application.
* @return Returns hotplug info struct on success, NULL on failure
*
*/
cvmx_app_hotplug_info_t* cvmx_app_hotplug_get_info_at_index(int index)
{
cvmx_app_hotplug_info_t *hip;
cvmx_app_hotplug_global_t *hgp;
hgp = cvmx_app_get_hotplug_global_ptr();
if (!hgp) return NULL;
hip = hgp->hotplug_info_array;
#ifdef DEBUG
printf("cvmx_app_hotplug_get_info(): hotplug_info phy addr 0x%llx ptr %p\n",
block_desc->base_addr, hgp);
#endif
if (index < CVMX_APP_HOTPLUG_MAX_APPS)
{
if (hip[index].valid)
{
//print_hot_plug_info( &hip[index] );
return &hip[index];
}
}
return NULL;
}
/**
* Determines if SE application at the index specified is hotpluggable.
*
* @param index index of application.
* @return Returns -1 on error.
* 0 -> The application is not hotpluggable
* 1 -> The application is hotpluggable
*/
int is_app_hotpluggable(int index)
{
cvmx_app_hotplug_info_t *ai;
if (!(ai = cvmx_app_hotplug_get_info_at_index(index)))
{
printf("\nERROR: Failed to get hotplug info for app at index=%d\n", index);
return -1;
}
if (ai->hotplug_activated_coremask) return 1;
return 0;
}
/**
* This routine sends a shutdown request to a running target application.
*
* @param coremask Coremask the application is running on.
* @param wait 1 - Wait for shutdown completion
* 0 - Do not wait
* @return 0 on success, -1 on error
*
*/
int cvmx_app_hotplug_shutdown_request(uint32_t coremask, int wait)
{
int i;
cvmx_app_hotplug_info_t *hotplug_info_ptr;
if (!(hotplug_info_ptr = cvmx_app_hotplug_get_info(coremask)))
{
printf("\nERROR: Failed to get hotplug info for coremask: 0x%x\n", (unsigned int)coremask);
return -1;
}
hotplug_info_ptr->shutdown_cores = coremask;
if (!hotplug_info_ptr->shutdown_callback)
{
printf("\nERROR: Target application has not registered for hotplug!\n");
return -1;
}
if (hotplug_info_ptr->hotplug_activated_coremask != coremask)
{
printf("\nERROR: Not all application cores have activated hotplug\n");
return -1;
}
/* Send IPIs to all application cores to request shutdown */
for (i=0; i<CVMX_MAX_CORES; i++) {
if (coremask & (1ull<<i))
cvmx_write_csr(CVMX_CIU_MBOX_SETX(i), 1);
}
if (wait)
{
while (!hotplug_info_ptr->shutdown_done);
/* Clean up the hotplug info region for this application */
bzero(hotplug_info_ptr, sizeof(*hotplug_info_ptr));
}
return 0;
}
/**
* This routine invokes the invoked the cores_added callbacks.
*/
int cvmx_app_hotplug_call_add_cores_callback(int index)
{
cvmx_app_hotplug_info_t *ai;
int i;
if (!(ai = cvmx_app_hotplug_get_info_at_index(index)))
{
printf("\nERROR: Failed to get hotplug info for app at index=%d\n", index);
return -1;
}
/* Send IPIs to all application cores to request add_cores callback*/
for (i=0; i<CVMX_MAX_CORES; i++) {
if (ai->coremask & (1ull<<i))
cvmx_write_csr(CVMX_CIU_MBOX_SETX(i), 4);
}
return 0;
}
/**
* This routine sends a request to a running target application
* to unplug a specified set cores
* @param index is the index of the target application
* @param coremask Coremask of the cores to be unplugged from the app.
* @param wait 1 - Wait for shutdown completion
* 0 - Do not wait
* @return 0 on success, -1 on error
*
*/
int cvmx_app_hotplug_unplug_cores(int index, uint32_t coremask, int wait)
{
cvmx_app_hotplug_info_t *ai;
int i;
if (!(ai = cvmx_app_hotplug_get_info_at_index(index)))
{
printf("\nERROR: Failed to get hotplug info for app at index=%d\n", index);
return -1;
}
ai->unplug_cores = coremask;
#if 0
if (!ai->shutdown_callback)
{
printf("\nERROR: Target application has not registered for hotplug!\n");
return -1;
}
#endif
if ( (ai->coremask | coremask ) != ai->coremask)
{
printf("\nERROR: Not all cores requested are a part of the app "
"r=%08x:%08x\n", (unsigned int)coremask, (unsigned int)ai->coremask);
return -1;
}
if (ai->coremask == coremask)
{
printf("\nERROR: Trying to remove all cores in app. "
"r=%08x:%08x\n", (unsigned int)coremask, (unsigned int)ai->coremask);
return -1;
}
/* Send IPIs to all application cores to request unplug/remove_cores
callback */
for (i=0; i<CVMX_MAX_CORES; i++) {
if (ai->coremask & (1ull<<i))
cvmx_write_csr(CVMX_CIU_MBOX_SETX(i), 2);
}
#if 0
if (wait)
{
while (!ai->shutdown_done);
/* Clean up the hotplug info region for this application */
bzero(ai, sizeof(*ai));
}
#endif
return 0;
}
/**
* Returns 1 if any app is currently being currently booted , hotplugged or
* shutdown. Only one app can be under a boot, hotplug or shutdown condition.
* Before booting an app this methods should be used to check whether boot or
* shutdown activity is in progress and proceed with the boot or shutdown only
* when there is no other activity.
*
*/
int is_app_under_boot_or_shutdown(void)
{
int ret=0;
cvmx_app_hotplug_global_t *hgp;
hgp = cvmx_app_get_hotplug_global_ptr();
cvmx_spinlock_lock(&hgp->hotplug_global_lock);
if (hgp->app_under_boot || hgp->app_under_shutdown) ret=1;
cvmx_spinlock_unlock(&hgp->hotplug_global_lock);
return ret;
}
/**
* Sets or clear the app_under_boot value. This when set signifies that an app
* is being currently booted or hotplugged with a new core.
*
*
* @param val sets the app_under_boot to the specified value. This should be
* set to 1 while app any is being booted and cleared after the
* application has booted up.
*
*/
void set_app_unber_boot(int val)
{
cvmx_app_hotplug_global_t *hgp;
hgp = cvmx_app_get_hotplug_global_ptr();
cvmx_spinlock_lock(&hgp->hotplug_global_lock);
hgp->app_under_boot = val;
cvmx_spinlock_unlock(&hgp->hotplug_global_lock);
}
/**
* Sets or clear the app_under_shutdown value. This when set signifies that an
* app is being currently shutdown or some cores of an app are being shutdown.
*
* @param val sets the app_under_shutdown to the specified value. This
* should be set to 1 while any app is being shutdown and cleared
* after the shutdown of the app is complete.
*
*/
void set_app_under_shutdown(int val)
{
cvmx_app_hotplug_global_t *hgp;
hgp = cvmx_app_get_hotplug_global_ptr();
cvmx_spinlock_lock(&hgp->hotplug_global_lock);
hgp->app_under_shutdown = val;
cvmx_spinlock_unlock(&hgp->hotplug_global_lock);
}
