/**
* This function saves all the context that will be lost
* when a CPU and cluster enter a low power state.
*
* This function is called with cluster->context->lock held
*/
int appf_platform_save_context(struct appf_cluster *cluster, struct appf_cpu *cpu, unsigned flags)
{
appf_u32 saved_items = 0;
appf_u32 cluster_saved_items = 0;
struct appf_cpu_context *context = cpu->context;
struct appf_cluster_context *cluster_context = cluster->context;
int cluster_down;
dbg_prints("save step 1\n");
/* Save perf. monitors first, so we don't interfere too much with counts */
if (flags & APPF_SAVE_PMU)
{
save_performance_monitors(context->pmu_data);
saved_items |= SAVED_PMU;
}
dbg_prints("save step 2\n");
if (flags & APPF_SAVE_TIMERS)
{
save_a9_timers(context->timer_data, cluster->scu_address);
saved_items |= SAVED_TIMERS;
}
dbg_prints("save step 3\n");
if (flags & APPF_SAVE_VFP)
{
save_vfp(context->vfp_data);
saved_items |= SAVED_VFP;
}
dbg_prints("save step 4\n");
if(cluster->ic_address)
save_gic_interface(context->gic_interface_data, cluster->ic_address);
if(cluster->ic_address)
save_gic_distributor_private(context->gic_dist_private_data, cluster->ic_address);
/* TODO: check return value and quit if nonzero! */
dbg_prints("save step 5\n");
save_banked_registers(context->banked_registers);
save_cp15(context->cp15_data);
save_a9_other(context->other_data);
if (flags & APPF_SAVE_DEBUG)
{
save_a9_debug(context->debug_data);
saved_items |= SAVED_DEBUG;
}
dbg_prints("save step 6\n");
cluster_down = cluster->power_state >= 2;
// if (cluster_down)
{
if ((flags & APPF_SAVE_TIMERS) && cluster->cpu_version >= 0x0100)
{
save_a9_global_timer(cluster_context->global_timer_data, cluster->scu_address);
cluster_saved_items |= SAVED_GLOBAL_TIMER;
}
save_gic_distributor_shared(cluster_context->gic_dist_shared_data, cluster->ic_address);
}
save_control_registers(context);
save_mmu(context->mmu_data);
context->saved_items = saved_items;
dbg_prints("save step 7\n");
// if (cluster_down)
{
if(cluster->scu_address)
save_a9_scu(cluster_context->scu_data, cluster->scu_address);
if (flags & APPF_SAVE_L2)
{
save_pl310(cluster_context->l2_data, cluster->l2_address);
cluster_saved_items |= SAVED_L2;
}
cluster_context->saved_items = cluster_saved_items;
}
dbg_prints("save step 8\n");
/*
* DISABLE DATA CACHES
*
* First, disable, then clean+invalidate the L1 cache.
*
* Note that if L1 was to be dormant and we were the last CPU, we would only need to clean some key data
* out of L1 and clean+invalidate the stack.
*/
//asm volatile("mov r0,#0");
//asm volatile("mcr p15, 0, r0, c7, c5, 0");
//disable_clean_inv_dcache_v7_l1();
//v7_flush_dcache_all();
/*
* Next, disable cache coherency
*/
if (cluster->scu_address)
{
write_actlr(read_actlr() & ~A9_SMP_BIT);
}
dbg_prints("save step 9\n");
/*
* If the L2 cache is in use, there is still more to do.
*
* Note that if the L2 cache is not in use, we don't disable the MMU, as clearing the C bit is good enough.
*/
if (flags & APPF_SAVE_L2)
{
/*
* Disable the MMU (and the L2 cache if necessary), then clean+invalidate the stack in the L2.
* This all has to be done one assembler function as we can't use the C stack during these operations.
*/
dbg_print("falg=",flags)
disable_clean_inv_cache_pl310(cluster->l2_address, appf_platform_get_stack_pointer() - STACK_SIZE,
STACK_SIZE, cluster_down);
/*
* We need to partially or fully clean the L2, because we will enter reset with cacheing disabled
*/
// if (cluster_down)
{
/* Clean the whole thing */
//clean_pl310(cluster->l2_address);
// l2x0_flush_all();
}
// else
{
/*
* L2 staying on, so just clean everything this CPU will need before the MMU is reenabled
*
* TODO: some of this data won't change after boottime init, could be cleaned once during late_init
*/
// clean_range_pl310(cluster, sizeof(struct appf_cluster), cluster->l2_address);
// clean_range_pl310(cpu, sizeof(struct appf_cpu), cluster->l2_address);
// clean_range_pl310(context, sizeof(struct appf_cpu_context), cluster->l2_address);
// clean_range_pl310(context->mmu_data, MMU_DATA_SIZE, cluster->l2_address);
// clean_range_pl310(cluster_context, sizeof(struct appf_cluster_context), cluster->l2_address);
}
}
dbg_prints("save step 10\n");
return APPF_OK;
}
/*------------------------------------------------------------------------------
Function: mstar_pm_enter
Description:
Actually enter sleep state
Input: (The arguments were used by caller to input data.)
state - suspend state (not used)
Output: (The arguments were used by caller to receive data.)
None.
Return:
0
Remark:
None.
-------------------------------------------------------------------------------*/
static int mstar_pm_enter(suspend_state_t state)
{
void *pWakeup=0;
__asm__ volatile (
"ldr r1, =MSTAR_WAKEUP_ENTRY\n"
"str r1, %0"
:"=m"(pWakeup)::"r1"
);
if(pre_str_max_cnt!=get_str_max_cnt())
{
pre_str_max_cnt=get_str_max_cnt();
mstr_cnt=0;
}
mstr_cnt++;
mstar_save_int_mask();
save_performance_monitors((appf_u32 *)performance_monitor_save);
save_a9_timers((appf_u32*)&a9_timer_save, PERI_ADDRESS(PERI_PHYS));
save_a9_global_timer((appf_u32 *)a9_global_timer_save,PERI_ADDRESS(PERI_PHYS));
save_gic_interface((appf_u32 *)gic_interface_save,(unsigned)_gic_cpu_base_addr,1);
save_gic_distributor_private((appf_u32 *)gic_distributor_private_save,(unsigned)_gic_dist_base_addr,1);
save_cp15((appf_u32 *)cp15_save);// CSSELR
//save_a9_other((appf_u32 *)a9_other_save,1);
//save_v7_debug((appf_u32 *)&a9_dbg_data_save);
save_gic_distributor_shared((appf_u32 *)gic_distributor_shared_save,(unsigned)_gic_dist_base_addr,1);
//start add
save_control_registers(control_data, 1);
save_mmu(mmu_data);
//end add
save_a9_scu((appf_u32 *)a9_scu_save,PERI_ADDRESS(PERI_PHYS));
save_pl310((appf_u32*)&pl310_context_save,L2_CACHE_ADDRESS(L2_CACHE_PHYS));
sleep_save_neon_regs(&MStar_Suspend_Buffer[SLEEPSTATE_NEONREG/WORD_SIZE]);
sleep_save_cpu_registers(MStar_Suspend_Buffer);
sleep_set_wakeup_save_addr_phy(mstar_virt_to_phy((void*)WAKEUP_SAVE_ADDR),(void*)WAKEUP_SAVE_ADDR);
sleep_prepare_last(mstar_virt_to_phy(pWakeup));
write_actlr(read_actlr() & ~A9_SMP_BIT);//add
SerPrintf("\nMStar STR waiting power off...\n");
__asm__ volatile (
"nop\n"
:::"r0","r1","r2","r3","r4","r5","r6","r7","r8","r9","r10","r12"
);
//__asm__ volatile(
// "SUSPEND_WAIT:\n"
// "nop\n"
// "nop\n"
// "b SUSPEND_WAIT\n"
// );
// pass different password to do ac onoff
if(get_str_max_cnt()>0 &&mstr_cnt>=get_str_max_cnt())
{
SerPrintf("Max Cnt Ac off...\n");
mstar_str_notifypmmaxcnt_off();
}
else
{
#ifdef CONFIG_MSTAR_STR_CRC
if(get_str_crc())
{
MDrv_MBX_NotifyPMtoCrcCheck(false);
MDrv_MBX_write_kernel_info();
MDrv_MBX_NotifyPMtoCrcCheck(true);
while(!MDrv_MBX_recviceAck());
}
#endif
MDrv_MBX_NotifyPMtoSetPowerOff();
}
__asm__ volatile(
"WAIT_SLEEP:\n"
"nop\n"
"nop\n"
"b WAIT_SLEEP\n"
);
//////////////////////////////////////////////////////////////
__asm__ volatile(
"MSTAR_WAKEUP_ENTRY:\n"
"bl ensure_environment\n"
"bl use_tmp_stack\n"
"mov r0, #'K'\n"
"bl __PUTCHAR\n"
"ldr r1, =exit_addr\n"
"sub r0, pc,#4 \n"
"b sleep_wakeup_first\n" //sleep_wakeup_first();
"exit_addr: \n"
"mov r0, #'L'\n"
"bl PUTCHAR_VIRT\n"
"ldr r0,=MStar_Suspend_Buffer\n"
"bl sleep_restore_cpu_registers\n" //sleep_restore_cpu_registers(MStar_Suspend_Buffer)
:::"r0","r1","r2","r3","r4","r5","r6","r7","r8","r9","r10","r12"
);
SerPrintf("\nMStar STR Resuming...\n");
sleep_restore_neon_regs(&MStar_Suspend_Buffer[SLEEPSTATE_NEONREG/WORD_SIZE]);
restore_a9_scu((appf_u32 *)a9_scu_save,PERI_ADDRESS(PERI_PHYS));
restore_pl310((appf_u32*)&pl310_context_save,L2_CACHE_ADDRESS(L2_CACHE_PHYS), 0); //means power off
//start add
restore_mmu(mmu_data);
restore_control_registers(control_data, 1);
//end add
//restore_v7_debug((appf_u32 *)&a9_dbg_data_save);
restore_gic_distributor_shared((appf_u32 *)gic_distributor_shared_save,(unsigned)_gic_dist_base_addr,1);
gic_distributor_set_enabled(TRUE, (unsigned)_gic_dist_base_addr);//add
restore_gic_distributor_private((appf_u32 *)gic_distributor_private_save,(unsigned)_gic_dist_base_addr,1);
restore_gic_interface((appf_u32 *)gic_interface_save,(unsigned)_gic_cpu_base_addr,1);
//restore_a9_other((appf_u32 *)a9_other_save,1);
restore_cp15((appf_u32 *)cp15_save);
restore_a9_timers((appf_u32*)&a9_timer_save, PERI_ADDRESS(PERI_PHYS));
restore_a9_global_timer((appf_u32 *)a9_global_timer_save,PERI_ADDRESS(PERI_PHYS));
restore_performance_monitors((appf_u32 *)performance_monitor_save);
mstar_restore_int_mask();
sleep_clear_wakeup_save_addr_phy(mstar_virt_to_phy((void*)WAKEUP_SAVE_ADDR),(void*)WAKEUP_SAVE_ADDR);
platform_smp_boot_secondary_init(1);
mstar_sleep_cur_cpu_flush();
#if defined(CONFIG_MP_PLATFORM_ARM)
{
extern int __init init_irq_fiq_merge(void);
init_irq_fiq_merge();
}
#endif /* CONFIG_MP_PLATFORM_ARM */
return 0;
}
