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diff --git a/doc/README.Heterogeneous-SoCs b/doc/README.Heterogeneous-SoCs new file mode 100644 index 0000000..9da652e --- /dev/null +++ b/doc/README.Heterogeneous-SoCs @@ -0,0 +1,105 @@ +DSP side awareness for Freescale heterogeneous multicore chips based on +StarCore and Power Architecture +=============================================================== +powerpc/mpc85xx code ve APIs and function to get the number, +configuration and frequencies of all PowerPC cores and devices +connected to them, but it didnt have the similar code ofr HEterogeneous +SC3900/DSP cores and such devices like CPRI, MAPLE, MAPLE-ULB etc. + +Code for DSP side awareness provides such functionality for Freescale +Heterogeneous SoCs which are chasis-2 compliant like B4860 and B4420 + +As part of this feature, following changes have been made: +========================================================== + +1. Changed files: +================= +- arch/powerpc/cpu/mpc85xx/cpu.c + +Code added in this file to print the DSP cores and other device's(CPRI, +MAPLE etc) frequencies + +- arch/powerpc/cpu/mpc85xx/speed.c + +Added Defines and code to extract the frequncy information for all +required cores and devices from RCW and System frequency + +- arch/powerpc/cpu/mpc8xxx/cpu.c + +Added API to get the number of SC cores in running system and Their BIT +MASK, similar to the code written for PowerPC + +- arch/powerpc/include/asm/config_mpc85xx.h + +Added top level CONFIG to identify presence of HETEROGENUOUS clusters +in the system and CONFIGS for SC3900/DSP components + +- arch/powerpc/include/asm/processor.h +- include/common.h + +Added newly added Functions Declaration + +- include/e500.h + +Global structure updated for dsp cores and other components + +2. CONFIGs ADDED +================ + +CONFIG_HETROGENOUS_CLUSTERS - Define for checking the presence of + DSP/SC3900 core clusters + +CONFIG_SYS_FSL_NUM_CC_PLLS - Define for number of PLLs + +Though there are only 4 PLLs in B4, but in sequence of PLLs from PLL1 - +PLL5, PLL3 is Reserved(as mentioned in RM), so this define contains the +value as 5 not 4, to iterate over all PLLs while coding + +CONFIG_SYS_MAPLE - Define for MAPLE Baseband Accelerator +CONFIG_SYS_CPRI - Define for CPRI Interface +CONFIG_PPC_CLUSTER_START - Start index of ppc clusters +CONFIG_DSP_CLUSTER_START - Start index of dsp clusters + +Following are the defines for PLL's index that provide the Clocking to +CPRI, ULB and ETVE components + +CONFIG_SYS_CPRI_CLK - Define PLL index for CPRI clock +CONFIG_SYS_ULB_CLK - Define PLL index for ULB clock +CONFIG_SYS_ETVPE_CLK - Define PLL index for ETVPE clock + +3. Changes in MPC85xx_SYS_INFO Global structure +=============================================== + +DSP cores and other device's components have been added in this structure. + +freq_processor_dsp[CONFIG_MAX_DSP_CPUS] - Array to contain the DSP core's frequencies +freq_cpri - To store CPRI frequency +freq_maple - To store MAPLE frequency +freq_maple_ulb - To store MAPLE-ULB frequency +freq_maple_etvpe - To store MAPLE-eTVPE frequency + +4. U-BOOT LOGS +============== +4.1 B4860QDS board + Boot from NOR flash + +U-Boot 2014.07-00222-g70587a8-dirty (Aug 07 2014 - 13:15:47) + +CPU0: B4860E, Version: 2.0, (0x86880020) +Core: e6500, Version: 2.0, (0x80400020) Clock Configuration: + CPU0:1600 MHz, CPU1:1600 MHz, CPU2:1600 MHz, CPU3:1600 MHz, + DSP CPU0:1200 MHz, DSP CPU1:1200 MHz, DSP CPU2:1200 MHz, DSP CPU3:1200 MHz, + DSP CPU4:1200 MHz, DSP CPU5:1200 MHz, + CCB:666.667 MHz, + DDR:933.333 MHz (1866.667 MT/s data rate) (Asynchronous), IFC:166.667 MHz + CPRI:600 MHz + MAPLE:600 MHz, MAPLE-ULB:800 MHz, MAPLE-eTVPE:1000 MHz + FMAN1: 666.667 MHz + QMAN: 333.333 MHz + +CPUn - PowerPC core +DSP CPUn - SC3900 core + +Shaveta Leekha(shaveta@freescale.com) +Created August 7, 2014 +=========================================== |