| 1 | = GIET_VM / Peripherals Drivers = |
| 2 | |
| 3 | [[PageOutline]] |
| 4 | |
| 5 | The GIET_VM supports two types of peripheral components: '''External peripherals''' are located in one single cluster (called ''cluster_io'', and identified by the ''X_IO,Y_IO'' variables); '''Internal peripherals''' are replicated in all clusters. |
| 6 | |
| 7 | Each driver xxx_driver define two low-level functions ''_xxx_get_register()'' and ''_xxx_set_register()'' |
| 8 | to access the peripheral addressable registers. These functions are in charge to compute the peripheral registers addresses, taking into account the peripheral base address, the register index, and the cluster coordinates: |
| 9 | |
| 10 | * '''External peripherals''': All accesses use virtual addresses if the MMU (Memory management Unit) is activated, or physical addresses if it is not. In this case, the physical address is computed as pbase = SEG_XXX_BASE + cluster_io << 32. |
| 11 | |
| 12 | * '''Internal peripherals''': All accesses use virtual addresses, and the MMU must be activated. The peripheral virtual base address is computed as vbase = SEG_XXX_BASE + cluster_xy * PERI_CLUSTER_INCREMENT. |
| 13 | |
| 14 | The X_IO, Y_IO, and PERI_CLUSTER_INCREMENT variables must be defined in the ''hard_config.h" file. |
| 15 | |
| 16 | === [wiki:bdv_driver BDV (Block Device controller)] |
| 17 | |
| 18 | === [wiki:cma_driver CMA (Chained Buffer DMA controller)] |
| 19 | |
| 20 | === [wiki:dma_driver DMA (Multi-Channels DMA controller)] |
| 21 | |
| 22 | === [wiki:fbf_driver FBF (Frame Buffer controller)] |
| 23 | |
| 24 | === [wiki:hba_driver HBA (AHCI Disk controller)] |
| 25 | |
| 26 | === [wiki:icu_driver ICU (Interrupt controller)] |
| 27 | |
| 28 | === [wiki:iob_driver IOB (I/O Bridge controller)] |
| 29 | |
| 30 | === [wiki:ioc_driver IOC (Generic I/O controller)] |
| 31 | |
| 32 | === [wiki:mmc_driver MMC (Memory Cache controller)] |
| 33 | |
| 34 | === [wiki:nic_driver NIC (Gigabit Ethernet Network controller)] |
| 35 | |
| 36 | === [wiki:pic_driver PIC (External Peripherals Interrupt controller)] |
| 37 | |
| 38 | === [wiki:rdk_driver RDK (RamDisk)] |
| 39 | |
| 40 | === [wiki:sim_driver SIM (Monitor controller)] |
| 41 | |
| 42 | === [wiki:sdc_driver SDC (SDC Disk controller)] |
| 43 | |
| 44 | === [wiki:tim_driver TIM (Multi Timers controller)] |
| 45 | |
| 46 | === [wiki:tty_driver TTY (Multi Terminals TTY controller)] |
| 47 | |
| 48 | === [wiki:xcu_driver XCU (Extended Interrupt controller)] |