Pervasive

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

Reset

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.

Clock Gating

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.

Devices

The offsets and masks of Pervasive devices are documented below. Some devices appear to only be accessible in secure world.

Offset Description Gate Mask Reset Mask Comments
0x0 Arm ? ? ARM CPU
0x4 Arm ? ? ARM CPU
0x10 Gpu (?Secure?) ?0xF00F? GPU
0x20 Venezia ?0xF000F? See Venezia.
0x20 ? (Secure) 0x3 0x3
0x24 ? (Secure) 0x1 0x1
0x28 ? (Secure) 0x1 0x1 GpuEs4 and SceEmcTop related
0x30 Vip 0x1 0x1 Venezia Image Processor. See Venezia.
0x30 Vip (Secure) 0x2 0x2 Venezia Image Processor. See Venezia.
0x34 ? 0x1 Venezia related
0x40 0x10000) by second_loader. 0x1 0x1
0x44 CameraBus (Secure) 0x1 0x1
0x50 ? (Secure) Set to 1 by second_loader. 0x1 0x1
0x54 ? (Secure) 0x1 0x1
0x58 ? (Secure) 0x1 0x1
0x5C ? (Secure) 0x1 0x1
0x60 ? (Secure) 0x1 0x1
0x64 ? (Secure) 0x1 0x1
0x70 CSI0 0x1 Camera Serial Interface
0x74 CSI1 0x1 Camera Serial Interface
0x80 IFTU0 0xF 0x7 Integrated Facility Terminating Unit. See IFTU Registers.
0x84 IFTU1 0xF 0x7 Integrated Facility Terminating Unit. See IFTU Registers.
0x88 IFTU2 0xF 0x7 Integrated Facility Terminating Unit. See IFTU Registers.
0x8C ? 0x1
0x90 UDC0 0xA 0xA USB Device Controller. See UDC.
0x94 UDC1 0xA 0xA USB Device Controller. See UDC.
0xA0 SDIF0 0x1 Storage Device InterFace
0xA4 SDIF1 0x1 Storage Device InterFace
0xA8 SDIF2 0x1 Storage Device InterFace
0xB0 MSIF 0x1 Memory Stick InterFace. See MSIF Registers.
0xC0 I2s0 (Audio) 0x1 0x1 Inter-IC Sound
0xC4 I2s1 (Audio) 0x1 0x1 Inter-IC Sound
0xC8 I2s2 (Audio) 0x1 0x1 Inter-IC Sound
0xCC I2s3 (Audio) 0x1 0x1 Inter-IC Sound
0xD0 I2s4 (Audio) 0x1 0x1 Inter-IC Sound
0xD4 I2s5 (Audio) 0x1 0x1 Inter-IC Sound
0xD8 I2s6 (Audio) 0x1 0x1 Inter-IC Sound
0xDC I2s7 (Audio) 0x1 0x1 Inter-IC Sound
0xE0 SrcMix0 (Audio) 0x1 0x1 Source Mixer
0xE4 SrcMix1 (Audio) 0x1 0x1 Source Mixer
0xE8 SrcMix2 (Audio) 0x1 0x1 Source Mixer
0xEC ? ? ?
0xF0 SPDIF (Audio) 0x1 0x1 Sony/Philips Digital InterFace
0x100 GPIO 0x1 0x1 General Purpose Input/Output. See GPIO Registers.
0x104 SPI0 (Syscon) 0x1 0x1 Serial Peripheral Interface. See SPI Registers.
0x108 SPI1 (Motion) 0x1 0x1 Serial Peripheral Interface. See SPI Registers.
0x10C SPI2 (OLED) 0x1 0x1 Serial Peripheral Interface. See SPI Registers.
0x110 I2C0 0x1 0x1 Inter-Integrated Circuit. See I2C Registers.
0x114 I2C1 0x1 0x1 Inter-Integrated Circuit. See I2C Registers.
0x118
0x11C
0x120 UART0 (Console) 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x124 UART1 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x128 UART2 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x12C UART3 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x130 UART4 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x134 UART5 (3G Modem) 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x138 UART6 0x1 0x1 Universal Asynchronous Receiver Transmitter. See UART Registers.
0x160 LPDDR2MAIN 0x1 0x1 Main LPDDR2 RAM
0x164 LPDDR2SUB 0x1 0x1 Secondary LPDDR2 RAM
0x180 ? 0x1
0x1A4 ? ? ?
0x1F0 DMAC5 ? ? Direct Memory Access Controller. See Dmac5.

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

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
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

ScePervasive2 (0xE3110000)

Offset Description
0xF40 Bit 0 = Memory Card insert state