Editing Talk:Non Volatile Storage

= Findings from Kernel by Z80 =

From kernel of PS4 System Software version 1.76.

<source lang="C">
sceSblDevActVerifyCheckExpire:
icc_nvs_read(0LL, 4uLL, 0x80LL, 0x68uLL, &data_ptr);
icc_nvs_read(0LL, 4uLL, 0x900LL, 0x100uLL, &v12);

read_idstorage:???
icc_nvs_read(0LL, 4uLL, LOWORD(dword_FFFFFFFF82A484D4[v8]), v9, a2);

g_crypt_deferred_init:
icc_nvs_read(0LL, 4uLL, 0x200LL, 0x40-0x60, &enc_eap_key_);

srtc_create_dev:
icc_nvs_read(0LL, 4uLL, 0x2CC0LL(maybe0x2c00LL), 0x20uLL, &data_ptr[v18]);

wlan related TRSW wlan/bt power state/mode:???
icc_nvs_read(0LL, 4uLL, 0x30LL, 1uLL, &data_ptr)

sub_FFFFFFFF82751F70:wlan related TRSW???
icc_nvs_read(0LL, 1uLL, 0x40LL, 0x10uLL, (v2 + 1096))

regMgrNvsSpInit:
icc_nvs_read(0LL, 4uLL, 0x1600LL, 0x20uLL, &qword_FFFFFFFF8346C520);

sub_FFFFFFFF826A9AC0:
icc_nvs_read(0LL, 4uLL, 0x1000LL, 0x300uLL, PrivateStorageAddr1_ptr);
icc_nvs_read(0LL, 4uLL, 0x1300LL, 0x300uLL, PrivateStorageAddr2_ptr);

get_extra_clock:aeolia_rtc_???
icc_nvs_read(0LL, 4uLL, 0x50LL, 1uLL, &off_FFFFFFFF83377C99)

iccnvs_kproc:
icc_nvs_read(0LL, *(*(v6 + 2) + 0x20LL), *(v6 + 12), *(v6 + 16), *(v6 + 5))

sub_FFFFFFFF8262DC60:sysctl_machdep_cavern_dvt1_init_update: current_mode:  ???
icc_nvs_read(0LL, 4uLL, 0x21LL, 1uLL, &data_ptr);

lvp_configure_tccds:
icc_nvs_read(0LL, 4uLL, 0x322LL, 1uLL, &data_ptr);

manumode:
icc_nvs_read(0LL, 4uLL, 0x2C00LL, 0x20uLL, &data_ptr);

init_safe_mode mode ???
icc_nvs_read(0LL, 4uLL, 0x20LL, 1uLL, &data_ptr)

sce_cam_error_log_read:
icc_nvs_read(0LL, 4uLL, 0x100LL, 0x100uLL, &data_ptr);

sub_FFFFFFFF827D2F50:qafutkn ???
icc_nvs_read(1LL, 4uLL, 0x0a00LL, 0x190uLL, &data_ptr);

sub_FFFFFFFF827D8E30:???
icc_nvs_write(0LL, 4uLL, 0LL, 0x20uLL, &dipsw_FFFFFFFF836C0090);
</syntaxhighlight>

From kernel of PS4 System Software version 1.00 Tool (DevKit).

<source lang="C">
sce_cam_error_put:

icc_nvs_read(0, 4u, 0x100, 0x100u, (__int64)v31);
icc_nvs_write(0LL, 4LL, 0x1FCLL, 4LL, &v29);
v18 = sce_device_error_log;
icc_nvs_write(0LL, 4LL, (unsigned __int16)(0x28 * (v18 % 6) + 0x100), 0x28LL, v32);

get_init_safe_mode:

icc_nvs_read(0, 4u, 0x20, 1u, (__int64)&v5) )

start_init:

if ( (unsigned int)icc_nvs_read(0, 4u, 0x20, 1u, (__int64)&v51) )
LABEL_43:
      panic((unsigned int)"failed to retrieve init_safe_mode", 4, v0, v1, v2, v3);

if ( (unsigned int)icc_nvs_read(0, 4u, 0x20, 1u, (__int64)&v51) )
        goto LABEL_43;
      if ( v51 == 0xFF )
        printf((unsigned int)"Falling back to orbis_diag...\n", 4, v0, v1, v2, v3);
      else
        printf((unsigned int)"%s is not found. trying next...\n", v52[0], v0, v1, v2, v3);
      goto LABEL_36;

sysctl_kern_init_safe_mode:

if ( (unsigned int)icc_nvs_read(0, 4u, 0x20, 1u, (__int64)&v13) )
    panic((unsigned int)"failed to retrieve init_safe_mode", 4, v5, v6, v7, v8);

sysctl_manumode:

result = icc_nvs_read(0, 4u, 0x2C00, 0x20u, (__int64)v8);
  if ( !(_DWORD)result )
  {
    if ( !(unsigned int)memcmp(v8, &sysctl_manumode_manu_mode_0xff, 0x20LL) )

result = icc_nvs_write(1LL, 4LL, 0x2C00LL, 0x20LL, &sysctl_manumode_manu_mode_0x00);
          if ( !(_DWORD)result )
          {
            bzero(v8, 32LL);
            result = icc_nvs_read(0, 4u, 0x2C00, 0x20u, (__int64)v8);
            if ( !(_DWORD)result )
              return 5 * (unsigned int)((unsigned int)memcmp(v8, &sysctl_manumode_manu_mode_0x00, 0x20LL) != 0);

lvp_configure_tccds:

if ( (unsigned int)(a1 - 2) < 4 || !a1 || (result = 0x16LL, a1 == 0xFF) )
  {
    v2 = icc_nvs_read(0, 4u, 0x322, 1u, (__int64)&v3);
    result = 5LL;
    if ( !v2 )
    {
      result = 0LL;
      if ( v3 != (_BYTE)a1 )
        return 5 * (unsigned int)((unsigned int)icc_nvs_write(0LL, 4LL, 0x322LL, 1LL, &v4) != 0);
</syntaxhighlight>

= About EAP Hdd Key =

* sceSblGetEAPInternalPartitionKey((__int64)&unk_FFFFFFFF836C0000, &unk_FFFFFFFF836BC010, a2, a3, v7) ) 
* seems to contain 2 buffers
* unk_FFFFFFFF836C0000 (0x70) <- encrypted eap_hdd_key ?
* unk_FFFFFFFF836BC010 (0x70) <- decrypted eap_hdd_key ?

<source lang="C">
  v7 = icc_nvs_read(0LL, 4uLL, 0x200LL, v2, &enc_eap_key_);
  if ( v7 ) {
    v12 = v7;
    printf("icc_nvs_read failed: %d\n", v7, v8, v9, v10, v11, v19);
    panic("eap key not available", v12, v13, v14, v15, v16, v20);
  }
  printf("g_crypt_deferred_init: calling CCP\n", 4LL, v8, v9, v10, v11, v19);
  v12 = &eap_key_;
  if ( sceSblGetEAPInternalPartitionKey(&enc_eap_key_, &eap_key_) )
</syntaxhighlight>

= From EMC =

{| class="wikitable"
|+ Serial Flash NVS Area accessed by PS4 EMC firmware around 1.76
|-
! Index !! Offset in NVS !! Offset in sflash0 !! Size !! Unknown ?read? !! Has backup ?write? !! Backup address !! ?Backup address 2? !! Notes
|-
| 0 || 0 || 0x1C4000 || 0x1000 || 1 || 0 || 0 || 0 || Per-console fixed data
|-
| 1 || 0x1000 || 0x1C5000 || 0x1000 || 1 || 1 || 0x1CE000 || 0x1CF000 || Logs (including statistics)
|-
| 2 || 0x2000 || 0x1C6000 || 0x1000 || 1 || 0 || 0 || 0 || Unknown area
|-
| 3 || 0x3000 || 0x1C7000 || 0x1000 || 1 || 0 || 0 || 0 || pd region
|-
| 4 || 0x4000 || 0x1C8000 || 0x800 || 1 || 0 || 0 || 0 || ds region
|-
| 5 || 0x4800 || 0x1C8800 || 0x800 || 1 || 0 || 0 || 0 || cs region
|-
| 6 || 0x5000 || 0x1C9000 || 0x3000 || 1 || 0 || 0 || 0 || os region
|}