Raspberry Pi 4: Difference between revisions
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== Hardware ==
CPU is a BCM2711, containing 4 Cortex-A72 cores. In Linux they appear as
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 108.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd08
CPU revision : 3
The graphics is done with a Video Core VI. This is backwards-compatible with Video Core IV from Broadcom.
== Device memory map ==
Taken from Linux /proc/iomem as root
00000000-3b3fffff : System RAM
fd500000-fd50930f : pcie@7d500000
fd580000-fd58ffff : genet@7d580000
fd580e14-fd580e1c : unimac-mdio.-19
fd5d2200-fd5d222b : thermal@7d5d2200
fe007000-fe007aff : dma@7e007000
fe007b00-fe007eff : dma@7e007b00
fe00a000-fe00a023 : watchdog@7e100000
fe00b200-fe00b3ff : dwc_otg
fe00b840-fe00b87b : mailbox@7e00b840
fe00b880-fe00b8bf : mailbox@7e00b880
fe100000-fe100113 : watchdog@7e100000
fe101000-fe102fff : cprman@7e101000
fe104000-fe10400f : rng@7e104000
fe200000-fe2000b3 : gpio@7e200000
fe201000-fe2011ff : serial@7e201000
fe201000-fe2011ff : serial@7e201000
fe215000-fe215007 : aux@7e215000
fe300000-fe3000ff : mmcnr@7e300000
fe340000-fe3400ff : emmc2@7e340000
fe600000-fe6000ff : firmwarekms@7e600000
fe980000-fe98ffff : dwc_otg
fec00000-fec03fff : hub
fec04000-fec07fff : core0
fec11000-fec1101f : watchdog@7e100000
600000000-603ffffff : pcie@7d500000
600000000-6000fffff : PCI Bus 0000:01
600000000-600000fff : 0000:01:00.0
600000000-600000fff : xhci-hcd
== Devices as found by Linux, with addresses and Linux driver name ==
fd500000.pcie brcm-pcie
fd580000.genet bcmgenet
fe007b00.dma bcm2835-dma
fe00b840.mailbox bcm2835_vchiq
feb00000.hevc-decoder argon-mem
feb10000.argon-local-intc argon-mem
feb20000.h264-decoder argon-mem
feb30000.vp9-decoder argon-mem
fd5d2200.thermal brcmstb_thermal
fe007000.dma bcm2835-dma
fe00b880.mailbox bcm2835-mbox
fe100000.watchdog bcm2835-pm
fe101000.cprman bcm2835-clk
fe104000.rng iproc-rng200
fe200000.gpio pinctrl-bcm2835
fe200000.gpiomem gpiomem-bcm2835
fe201000.serial uart-pl011
fe215000.aux bcm2835-aux-clk
fe300000.mmcnr mmc-bcm2835
fe340000.emmc2 sdhci-iproc
fe600000.firmwarekms vc4_firmware_kms
fe980000.usb dwc_otg
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Still to write into text:
- Standard XHCI USB controller, in addition to the embedded IP block that was in the Pi 1-3. The USB-A connectors are run by the XHCI block now, while the charging port is on the IP block. Previously they were all on the IP block.
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