Pervasive

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Pervasive is a device that controls the clocks of most of the devices of the system.

ScePervasiveMisc (0xE3100000)

Devices can be fully disabled? by writing a 1 to the corresponding bit of the ScePervasiveMisc (PA 0xE3100000) register. To disable the device dev_off, do *REG32(0xE3100000 + (dev_off / 32) * 4) = 1 << (31 - (dev_off % 32)).

Offset Description
0x0000 "SoC revision". ex:0x80000115
0x0004 Unknown - SKBL prints L2 Cache is defective if bit 0x2 is set

"SoC revision"

Returned by SceLowio#scePervasiveGetSoCRevisionForDriver, read by SKBL/NSKBL/...

Contains the Kermit revision (see sceKernelSysrootGetKermitRevisionForKernel) and other information.

Bit mask Information
0x80000000 Disable LPDDR2SUB
0x30000000 Unknown (used by SceCrashDump)
0x4FFE0000 Unknown
0x0001FFFF Kermit revision
0x000000FF Kermit revision (old firmwares)
Known values
Hardware Value
PCH-1100 0x80000042
VTE-1016 0x80000042
PCH-2000 0x80000115
PDEL-1000 0x00000042

ScePervasiveReset (0xE3101000)

Devices must be put out of reset (device reset disabled) before they are first used.

To enable reset of a device (put a device in reset), do *REG32(0xE3101000 + dev_off) |= mask.

To disable reset of a device (put a device out of reset), do *REG32(0xE3101000 + dev_off) &= ~mask.

dev_off Access Device Reset Mask Comment
0x4 Secure? ARM Debugger? 1 Of ARM coprocessor 14?
0x10 Non-secure GPU 1 enable: ScePervasiveForDriver_3E79D3D3/disable: ScePervasiveForDriver_8A85E36B
0x20 Secure ? 1 enable: ScePervasiveForDriver_377126CD/disable: ScePervasiveForDriver_6E11EB97
0x24 Secure ? 1 enable: ScePervasiveForDriver_7B0F388B/disable: ScePervasiveForDriver_4CCD40E6
0x28 Secure ? 1 enable: ScePervasiveForDriver_7C285361/disable: ScePervasiveForDriver_E40BED0F
0x30 Non-secure Venezia 1 enable: ScePervasiveForDriver_28731EC5/disable: ScePervasiveForDriver_A7E64C6F
0x34 Non-secure Vip 1 enable: ScePervasiveForDriver_31C0A98B/disable: ScePervasiveForDriver_E2D8F6C3
0x40 Secure SceDbgSdio 1
0x44 Secure SceDbgSdio 1
0x48 Secure SceDbgSdio 1
0x4C Secure SceDbgSdio 1
0x50 Secure ? 1
0x54 Secure ? 1
0x58 Secure ? 1
0x5C Secure ? 1
0x60 Secure ? 1
0x64 Secure DMAC5 1
0x70 Non-secure Csi 1 Camera Serial Interface
0x74
0x80 Non-secure Dsi 1
0x84
0x88 Non-secure Iftu 1 Integrated Facility Terminating Unit. See IFTU Registers. enable: ScePervasiveForDriver_B68254AD/disable: ScePervasiveForDriver_E92E28FF
0x8C Non-secure ? 1 enable: ScePervasiveForDriver_7AE2F8E8/disable: ScePervasiveForDriver_17109C28
0x90 Non-secure USB/Udcd ? USB Device Controller. See UDC. enable: ScePervasiveForDriver_4AF7A01E/disable: ScePervasiveForDriver_13CC07C9
0x94
0xA0 Non-secure Sdif0 1 Storage Device InterFace
0xA4 Sdif1
0xA8 Sdif2
0xAC Sdif3
0xB0 Non-secure Msif 1 Memory Stick InterFace. See MSIF Registers.
0xC0 Non-secure I2S (Audio) 1 Inter-IC Sound
0xC4
0xC8
0xCC
0xD0
0xD4
0xD8
0xDC
0xE0 Non-secure SrcMix 1 Source Mixer
0xE4
0xE8
0xF0 Non-secure SPDIF (Audio) 1 Sony/Philips Digital InterFace
0x100 Non-secure Gpio 1 General Purpose Input/Output. See GPIO Registers.
0x104 Non-secure Spi (Syscon) 1 Serial Peripheral Interface. See SPI Registers.
0x108 Spi (Motion)
0x10C Spi (OLED)
0x110 Non-secure I2C 1 Inter-Integrated Circuit. See I2C Registers.
0x114
0x120 Non-secure Uart0 (Console) 1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x124 Uart1
0x128 Uart2
0x12C Uart3
0x130 Uart4
0x134 Uart5 (3G Modem)
0x138 Uart6
0x154 Secure? ? 1 Disable reset this device by SKBL on Development mode
0x158 Secure? ? 1
0x160 Secure? LPDDR2MAIN 1
0x164 Secure? LPDDR2SUB 1
0x180 Secure some media device 1 enable: ScePervasiveForDriver_EBE9C84E/disable: ScePervasiveForDriver_8CF567AD

ScePervasiveGate (0xE3102000)

Devices can be clock gated to preserve battery.

To enable clock gate (request the clock of a device to be enabled), do *REG32(0xE3102000 + dev_off) |= mask.

To disable clock gate (request the clock of a device to be disabled), do *REG32(0xE3102000 + dev_off) &= ~mask.

dev_off Access Device Gate Mask Comment
0x0 Secure? ? ?
0x4 Secure? ARM Debugger? 1 Of ARM coprocessor 14?
0x10 Non-secure GPU v & 0xF000F enable: ScePervasiveForDriver_39E51AE2/disable: ScePervasiveForDriver_CA0ACFC5
0x20 Secure ? 1 enable: ScePervasiveForDriver_8EE3AEDF/disable: ScePervasiveForDriver_3BF2A9B5
0x24 Secure ? 1 enable: ScePervasiveForDriver_7F4AB4AA/disable: ScePervasiveForDriver_0EBBE8DE
0x28 Secure ? 1 enable: ScePervasiveForDriver_B2EE45C9/disable: ScePervasiveForDriver_39979C55
0x30 Non-secure Venezia 1 (2 for secure) enable: ScePervasiveForDriver_FB01A2DD/disable: ScePervasiveForDriver_2EEBE9AE
0x34 Non-secure Vip 1 enable: ScePervasiveForDriver_B1CFA18F/disable: ScePervasiveForDriver_03E1FAA6
0x40 Secure SceDbgSdio 1
0x44 Secure SceDbgSdio 1
0x48 Secure SceDbgSdio 1 (also has 2?)
0x4C Secure SceDbgSdio 1
0x50 Secure ? 1
0x54 Secure ? 1
0x58 Secure ? 1
0x5C Secure ? 1
0x60 Secure ? 1
0x64 Secure DMAC5 1
0x70 Non-secure Csi 1 Camera Serial Interface
0x74
0x80 Non-secure Dsi 1
0x84
0x88 Non-secure Iftu 1 Integrated Facility Terminating Unit. See IFTU Registers. enable: ScePervasiveForDriver_07F2A738/disable: ScePervasiveForDriver_5AFE0AF0
0x8C Non-secure ? 1 enable: ScePervasiveForDriver_C0C842FE/disable: ScePervasiveForDriver_9BB7B932
0x90 Non-secure USB/Udcd ? USB Device Controller. See UDC. enable: ScePervasiveForDriver_4AF7A01E/disable: ScePervasiveForDriver_13CC07C9
0x94
0xA0 Non-secure Sdif0 1 Storage Device InterFace
0xA4 Sdif1
0xA8 Sdif2
0xAC Sdif3
0xB0 Non-secure Msif 1 Memory Stick InterFace. See MSIF Registers.
0xC0 Non-secure I2S (Audio) 1 Inter-IC Sound
0xC4
0xC8
0xCC
0xD0
0xD4
0xD8
0xDC
0xE0 Non-secure SrcMix 1 Source Mixer
0xE4
0xE8
0xF0 Non-secure SPDIF (Audio) 1 Sony/Philips Digital InterFace
0x100 Non-secure Gpio 1 General Purpose Input/Output. See GPIO Registers.
0x104 Non-secure Spi (Syscon) 1 Serial Peripheral Interface. See SPI Registers.
0x108 Spi (Motion)
0x10C Spi (OLED)
0x110 Non-secure I2C 1 Inter-Integrated Circuit. See I2C Registers.
0x114
0x120 Non-secure Uart0 (Console) 1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x124 Uart1
0x128 Uart2
0x12C Uart3
0x130 Uart4
0x134 Uart5 (3G Modem)
0x138 Uart6
0x154 Secure? ? 1 Enable this device by SKBL on Development mode
0x158 Secure? ? 1
0x160 Secure? LPDDR2MAIN 1
0x164 Secure? LPDDR2SUB 1

ScePervasiveBaseClk (0xE3103000)

Offset Access Device
0x0 Non-secure CPU (ARM)
0x4 Non-secure CPU (ARM)
0x10 Non-secure GPU
0x20 Non-secure Venezia
0x30 Non-secure Vip
0x40 Secure CMeP/Bus
0x44 Non-secure CameraBus
0x60 Non-secure ?
0x64 Non-secure ?
0x70 Non-secure ? (Audio related. freq setting by ScePervasiveForDriver_925D9D24)
0xA4 Non-secure ?
0xB0 Non-secure Msif
0xC4 Secure Xbar
0x1D0 Non-secure HDMI
0x1F0 Non-secure Direct Memory Access Controller 5. See Dmac5.
0x210 Non-secure ? (Audio related. freq setting by ScePervasiveForDriver_2FB5F88F)
0x214 Non-secure Sys

Base Clock

Registers at physical address 0xE2103000 (ScePervasiveBaseClk).

Offset Description
0x0/0x4 ARM Clocks
0x20 VENEZIA Clock
0x40 CMeP Clock

ARM Clocks

The ARM CPU clocks are controlled by two registers at physical address 0xE3103000 (ScePervasiveBaseClk). Currently, it is unknown how the values are interpreted. However, 0xE3103000 (one word) takes values 0 to 16, and increases clock speed while 0xE3103004 (single byte) takes values 0 to 8 and decreases clock speed. It is likely related to a PLL multiply and divide function. The input clock signal comes from a P1P40167 clock synthesizer (found on the bottom of the board under the main SoC). It takes a 27MHz crystal and generates a 37MHz clock which feeds directly into the SoC's internal PLL.

The following are tests run to determine what the values of each register corresponds to. It appears that the maximum clock speed is 499MHz and the minimum clock speed is 16MHz.

These clocks may be wrong. "Kernel Clock Speed" is "Clock Speed + 5". However, there is an error of ± 5 to 6 in "Clock Speed".

0xE3103000 0xE3103004 Clock Speed (MHz) Kernel Clock Speed (MHz)
0 0 37 42
0 1 35 40
0 2 32 37
0 3 29 34
0 4 27 32
0 5 24 29
0 6 22 27
0 7 19 24
0 8 16 21
1 0 37 42
1 1 35 40
1 2 32 37
1 3 30 35
1 4 27 32
1 5 24 29
1 6 22 27
1 7 19 24
1 8 16 21
2 0 37 42
2 1 35 40
2 2 32 37
2 3 30 35
2 4 27 32
2 5 24 29
2 6 22 27
2 7 19 24
2 8 16 21
3 0 79 84
3 1 74 79
3 2 69 74
3 3 63 68
3 4 58 63
3 5 53 58
3 6 48 53
3 7 43 48
3 8 37 42
4 0 107 112
4 1 100 105
4 2 93 98
4 3 86 91
4 4 79 84
4 5 72 77
4 6 65 70
4 7 58 63
4 8 51 56
5 0 162 167
5 1 152 157
5 2 142 147
5 3 131 136
5 4 121 126
5 5 110 115
5 6 100 105
5 7 90 95
5 8 79 84
6 0 218 223
6 1 204 209
6 2 190 195
6 3 176 181
6 4 163 168
6 5 148 153
6 6 135 140
6 7 121 126
6 8 107 112
7 0 329 334
7 1 308 313
7 2 287 292
7 3 266 271
7 4 246 251
7 5 225 230
7 6 204 209
7 7 183 188
7 8 162 167
8 0 439 444
8 1 411 416
8 2 384 389
8 3 356 361
8 4 329 334
8 5 301 306
8 6 273 278
8 7 246 251
8 8 218 223
9 0 494 499
9 1 463 468
9 2 432 437
9 3 401 406
9 4 370 375
9 5 339 344
9 6 308 313
9 7 277 282
9 8 245 250
10 0 328 333
10 1 308 313
10 2 287 292
10 3 266 271
10 4 245 250
10 5 225 230
10 6 204 209
10 7 183 188
10 8 162 167
11 0 37 42
11 1 35 40
11 2 32 37
11 3 30 35
11 4 27 32
11 5 24 29
11 6 22 27
11 7 19 24
11 8 16 21
12 0 121 126
12 1 113 118
12 2 105 110
12 3 97 102
12 4 90 95
12 5 82 87
12 6 74 79
12 7 66 71
12 8 58 63
13 0 245 250
13 1 230 235
13 2 214 219
13 3 199 204
13 4 183 188
13 5 168 173
13 6 152 157
13 7 136 141
13 8 121 126
14 0 439 444
14 1 412 417
14 2 384 389
14 3 356 361
14 4 329 334
14 5 301 306
14 6 273 278
14 7 246 251
14 8 218 223
15 0 494 499
15 1 463 468
15 2 433 438
15 3 401 406
15 4 370 375
15 5 339 344
15 6 308 313
15 7 277 282
15 8 245 250
16 0 37 42
16 1 35 40
16 2 32 37
16 3 29 34
16 4 27 32
16 5 24 29
16 6 22 27
16 7 19 24
16 8 16 21

CMeP Clock

The low 8 bits of the register at physical address 0xE3103040 seem to control CMeP clock speed. This was guessed because it is used in a usleep()-like function to calculate the input for a sleep_for_cycles() function.

The following data comes from a hardcoded table:

Value Clock speed
0x2 27MHz
0x3 42MHz
0x4 56MHz
0x5 83MHz
0x6 111MHz
0x7 160MHz
Any other value 50MHz

second_loader sets the register to 5, meaning CMeP should run at 83MHz.

VENEZIA Clock

The register at physical address 0xE3103020 seems to control the clock frequency of VENEZIA.

Allowed register values
Value Clock speed
0x1 41MHz
0x2 55MHz
0x3 83MHz
0x4 111MHz
0x5 166MHz
0x6 222MHz
0x7 333MHz

ScePervasive2 (0xE3110000)

Offset Description
0xF40 Bit 0 = Memory Card insert state
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