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#include "tz_ndbg.h"
#ifdef CC_ENABLE_NDBG
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <mach/battery_meter.h>
#include "trustzone/tz_cross/trustzone.h"
#include "trustzone/tz_cross/ta_test.h"
#include "trustzone/tz_cross/ta_mem.h"
#include "trustzone/tz_cross/ta_ndbg.h"
#include "trustzone/kree/system.h"
#include "trustzone/kree/mem.h"
#include "kree_int.h"
#ifdef CONFIG_MTK_SMART_BATTERY
extern int g_bat_init_flag;
static int get_bat_sense_volt(int times)
{
if(g_bat_init_flag != 0)
{
return battery_meter_get_battery_voltage(KAL_TRUE);
}
return 0;
}
static int get_i_sense_volt(int times)
{
if(g_bat_init_flag != 0)
{
return battery_meter_get_VSense();
}
return 0;
}
static int get_charger_volt(int times)
{
if(g_bat_init_flag != 0)
{
return battery_meter_get_charger_voltage();
}
return 0;
}
#endif
static int get_urandom_value(uint8_t *pu1Buf, int size)
{
mm_segment_t old_fs;
struct file *filp = filp_open("/dev/urandom", O_RDONLY, 0444);
if( IS_ERR(filp) )
{
printk("Failed to open /dev/urandom\n");
return -1;
}
old_fs = get_fs();
set_fs( KERNEL_DS );
filp->f_op->read(filp, pu1Buf, size, &(filp->f_pos));
set_fs(old_fs);
filp_close(filp, NULL);
return 0;
}
int entropy_thread(void * arg)
{
TZ_RESULT ret;
KREE_SESSION_HANDLE ndbg_session;
KREE_SESSION_HANDLE mem_session;
KREE_SHAREDMEM_HANDLE shm_handle;
KREE_SHAREDMEM_PARAM shm_param;
MTEEC_PARAM param[4];
uint8_t* ptr;
ptr = (uint8_t*)kmalloc(NDBG_REE_ENTROPY_SZ, GFP_KERNEL);
memset(ptr, 0, NDBG_REE_ENTROPY_SZ);
while(!kthread_should_stop())
{
ret = KREE_CreateSession(TZ_TA_NDBG_UUID, &ndbg_session);
if (ret != TZ_RESULT_SUCCESS)
{
printk("CreateSession error %d\n", ret);
return 1;
}
ret = KREE_CreateSession(TZ_TA_MEM_UUID, &mem_session);
if (ret != TZ_RESULT_SUCCESS)
{
printk("Create memory session error %d\n", ret);
return 1;
}
shm_param.buffer = ptr;
shm_param.size = NDBG_REE_ENTROPY_SZ;
ret = KREE_RegisterSharedmem(mem_session, &shm_handle, &shm_param);
if (ret != TZ_RESULT_SUCCESS)
{
printk("KREE_RegisterSharedmem Error: %s\n", TZ_GetErrorString(ret));
return 1;
}
#ifdef CONFIG_MTK_SMART_BATTERY
*((uint32_t*)(ptr+0)) = get_bat_sense_volt(1);
*((uint32_t*)(ptr+4)) = get_i_sense_volt(1);
*((uint32_t*)(ptr+8)) = get_charger_volt(1);
*((uint32_t*)(ptr+12)) = get_charger_volt(1);
get_urandom_value(ptr+NDBG_BAT_ST_SIZE, URAN_SIZE);
#else
/* without battery, any other good source for nondetermined #? */
get_urandom_value(ptr, NDBG_REE_ENTROPY_SZ);
#endif
param[0].memref.handle = (uint32_t) shm_handle;
param[0].memref.offset = 0;
param[0].memref.size = NDBG_REE_ENTROPY_SZ;
param[1].value.a = NDBG_REE_ENTROPY_SZ;
ret = KREE_TeeServiceCall((KREE_SESSION_HANDLE)ndbg_session,
TZCMD_NDBG_INIT,
TZ_ParamTypes3(TZPT_MEMREF_INPUT, TZPT_VALUE_INPUT, TZPT_VALUE_OUTPUT), param);
printk ("Start to wait reseed.\n");
ret = KREE_TeeServiceCall((KREE_SESSION_HANDLE)ndbg_session,
TZCMD_NDBG_WAIT_RESEED,
TZ_ParamTypes3(TZPT_MEMREF_INPUT, TZPT_VALUE_INPUT, TZPT_VALUE_OUTPUT), param);
printk ("OK to send reseed.\n");
ret = KREE_UnregisterSharedmem(mem_session, shm_handle);
if (ret != TZ_RESULT_SUCCESS)
{
printk("KREE_UnregisterSharedmem Error: %s\n", TZ_GetErrorString(ret));
return 1;
}
ret = KREE_CloseSession(ndbg_session);
if (ret != TZ_RESULT_SUCCESS)
printk("CloseSession error %d\n", ret);
ret = KREE_CloseSession(mem_session);
if (ret != TZ_RESULT_SUCCESS)
printk("Close memory session error %d\n", ret);
}
kfree(ptr);
return 0;
}
#ifdef CC_NDBG_TEST_PROGRAM
int test_random_thread(void * arg)
{
TZ_RESULT ret;
KREE_SESSION_HANDLE ndbg_session;
KREE_SESSION_HANDLE mem_session;
KREE_SHAREDMEM_HANDLE shm_handle;
KREE_SHAREDMEM_PARAM shm_param;
MTEEC_PARAM param[4];
uint32_t *ptr;
int size = 32;
ptr = (uint32_t *)kmalloc(size, GFP_KERNEL);
memset(ptr, 0, size);
while(!kthread_should_stop())
{
ret = KREE_CreateSession(TZ_TA_NDBG_UUID, &ndbg_session);
if (ret != TZ_RESULT_SUCCESS)
{
printk("CreateSession error %d\n", ret);
return 1;
}
ret = KREE_CreateSession(TZ_TA_MEM_UUID, &mem_session);
if (ret != TZ_RESULT_SUCCESS)
{
printk("Create memory session error %d\n", ret);
return 1;
}
shm_param.buffer = ptr;
shm_param.size = size;
ret = KREE_RegisterSharedmem(mem_session, &shm_handle, &shm_param);
if (ret != TZ_RESULT_SUCCESS)
{
printk("KREE_RegisterSharedmem Error: %s\n", TZ_GetErrorString(ret));
return 1;
}
param[0].memref.handle = (uint32_t) shm_handle;
param[0].memref.offset = 0;
param[0].memref.size = size/4;
param[1].value.a = size/4;
ret = KREE_TeeServiceCall((KREE_SESSION_HANDLE)ndbg_session,
TZCMD_NDBG_RANDOM,
TZ_ParamTypes3(TZPT_MEMREF_INPUT, TZPT_VALUE_INPUT, TZPT_VALUE_OUTPUT), param);
ret = KREE_UnregisterSharedmem(mem_session, shm_handle);
if (ret != TZ_RESULT_SUCCESS)
{
printk("KREE_UnregisterSharedmem Error: %s\n", TZ_GetErrorString(ret));
return 1;
}
ret = KREE_CloseSession(ndbg_session);
if (ret != TZ_RESULT_SUCCESS)
printk("CloseSession error %d\n", ret);
ret = KREE_CloseSession(mem_session);
if (ret != TZ_RESULT_SUCCESS)
printk("Close memory session error %d\n", ret);
ssleep(5);
}
kfree(ptr);
return 0;
}
#endif
void tz_ndbg_init(void)
{
kthread_run(entropy_thread, NULL, "entropy_thread");
#ifdef CC_NDBG_TEST_PROGRAM
kthread_run(test_random_thread, NULL, "test_random_thread");
#endif
}
#endif
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