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2017-11-17Speed up Dhrystone on the HiFive1Palmer Dabbelt
There's a handful of things that went wrong here: * The read-only data sections were mapped to flash, which is very slow. I just put them in the data segment, so they end up in the scratchpad. This is about a 10x hit, so it's really important. * The toolchain was an old version, which didn't have a fast memcpy implementation on 32-bit systems. This is about a 2x hit. * Some compiler flags were incorrect, including * -Os instead of -O3 * Missing -mexplicit-relocs * Missing -DNOENUM * Missing -falign-functions=4 I haven't checked how much those hurt With this, I get $ make software BOARD=freedom-e300-hifive1 PROGRAM=dhrystone LINK_TARGET=dhrystone $ make upload BOARD=freedom-e300-hifive1 PROGRAM=dhrystone LINK_TARGET=dhrystone Execution starts, 10000000 runs through Dhrystone Execution ends Final values of the variables used in the benchmark: Int_Glob: 5 should be: 5 Bool_Glob: 1 should be: 1 Ch_1_Glob: A should be: A Ch_2_Glob: B should be: B Arr_1_Glob[8]: 7 should be: 7 Arr_2_Glob[8][7]: 10000010 should be: Number_Of_Runs + 10 Ptr_Glob-> Ptr_Comp: -2147470264 should be: (implementation-dependent) Discr: 0 should be: 0 Enum_Comp: 2 should be: 2 Int_Comp: 17 should be: 17 Str_Comp: DHRYSTONE PROGRAM, SOME STRING should be: DHRYSTONE PROGRAM, SOME STRING Next_Ptr_Glob-> Ptr_Comp: -2147470264 should be: (implementation-dependent), same as above Discr: 0 should be: 0 Enum_Comp: 1 should be: 1 Int_Comp: 18 should be: 18 Str_Comp: DHRYSTONE PROGRAM, SOME STRING should be: DHRYSTONE PROGRAM, SOME STRING Int_1_Loc: 5 should be: 5 Int_2_Loc: 13 should be: 13 Int_3_Loc: 7 should be: 7 Enum_Loc: 1 should be: 1 Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRING should be: DHRYSTONE PROGRAM, 1'ST STRING Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRING should be: DHRYSTONE PROGRAM, 2'ND STRING Microseconds for one run through Dhrystone: 1.3 Dhrystones per Second: 714285.6 which is 1.55 DMIPS/MHz at 262 MHz. It's still a bit slower than our current stuff, but I don't remember what was actually in the HiFive1 so I'm not sure what we should be getting. I verified the clock is accurate with a stopwatch. I haven't bothered to go look through the binary, but I think we're about 10 cycles off so it should be managable.
2017-06-14Add linker scripts that target the scratchpadPalmer Dabbelt
Everything still defaults to the flash, but users can optionally select the scratchpad. Note that you have to be pretty careful about your scratchpad programs, most of them won't fit. For example, printf is too big to fit in the scratchpad.
2017-06-10Just lump all the RAM sections togetherPalmer Dabbelt
Since our loader doesn't support multiple sections anyway, there's really no reason to have all these sections floating around. They're causing trouble due to misalignment so it's easiest to just group them together so we can properly enforce alignment.
2017-06-09Use the correct global pointer symbolPalmer Dabbelt
2017-06-09Don't use .section\nALIGN, reorder sdata and srodataPalmer Dabbelt
I'm hoping this will make everything more likely to align. We can't use the other mechanism because our loader is lazy and assumes all the sections are contiguous.
2017-06-08Specify alignment on the .sdata and .srodata sectionsPalmer Dabbelt
Without these alignment directives the sections are only required to be aligned on word-sized boundries, but we sometimes require double-word alignment. This allows the linker to sanely emit these sections.
2017-05-04Update SDK For E31/E51 Coreplex IP EvaluationMegan Wachs
2017-01-24Use consistent OpenOCD config for Arty and HiFive1Megan Wachs
2017-01-11reduce code duplication and apply the same flags to Arty boardmwachs5
2017-01-11Add the 'bootloader' which ships on HiFive1 Boards.mwachs5
2017-01-03Regularize timing codeAndrew Waterman
Provide get_timer_value() and get_timer_freq() and use them. On Arty, they use mcycle and the known-fixed core frequency, whereas on HiFive1 they use mtime and the known-fixed mtime frequency.
2017-01-03Improve HiFive1 CPU frequency measurement routineAndrew Waterman
- Warm up I$ first. - Correct for integer division truncation error. - Wait for an RTC clock edge before starting the timing loop, which removes an error proportional to the number of loop iterations, allowing us to run for far less time.
2016-12-20Separate .text.unlikely and .text.startup from .textAndrew Waterman
This improves the instruction stream's spatial locality.
2016-12-20Pass argc and argv to main()Andrew Waterman
2016-12-17Remove unncessary srst delay when connecting with OpenOCD to HiFive1Megan Wachs
2016-12-14Move start.S and entry.S to a common directoryAlbert Ou
2016-12-14Merge pull request #25 from sifive/add_srst_optionMegan Wachs
hifive1: Update OpenOCD Config script to optionally allow pulsing SRST
2016-12-14hifive1: Update OpenOCD Config script to optionally allow pulsing SRSTMegan Wachs
2016-12-14Refactor libc stubs into libwrapAlbert Ou
The --wrap feature of GNU ld supports a cleaner framework for linking in alternative implementations of libc functions without cpp hacks. Place wrappers in separate object files to reduce static code size.
2016-12-13Use more standard form of _init()Megan Wachs
2016-12-13Use cleaner .S filesMegan Wachs
2016-12-11Add some missing LICENSE headers.Megan Wachs
2016-12-11platform: add more defines which are generally neededMegan Wachs
2016-12-09demo_gpio: Correct trap_entry handling to enable timer/ext interruptsMegan Wachs
2016-12-07Merge pull request #17 from sifive/enable-fpuScott Johnson
Enable FPU in MSTATUS CSR during init
2016-12-07Initialize FPU properlyScott Johnson
* Only attempts if FPU actually implemented in design * Also initializes rounding modes, which are undefined at reset
2016-12-07Place .init_array/.fini_array sections in flash instead of RAMAlbert Ou
This appears to resolve the issue of .sdata being assigned an incorrect LMA (ld warning "section `.sdata' can't be allocated in segment 1").
2016-12-06Enable FPU in MSTATUS CSR during initScott Johnson
This way, chips with FPU can run FPU instructions without taking exceptions. I've confirmed that dhrystone still runs successfully even on chips with no FPU.
2016-11-30Bump Everything to Match new Freedom Repo (#8)Megan Wachs
* Bump tool versions * Use version of OpenOCD which can load programs into flash * Bump OpenOCD to Handle ISSI Flash Programming * Update Header files * add initial support for hifive1 * add dhrystone * add clock helper functions * add openocd cfg file * Demo_GPIO checkpoint -- compiles and runs but no blinky LEDs * Remove riscv-tests submodule * Remove FPGA files, as they are no longer relevant to this Repository * Add openocd_upload script * Add Pinmux Mappings Adding the pinmux mappings to the Platform Header * Add IOF Mappings to platform header * Re-order the IOF Mapping declarations * Add more useful things to platform headers * Get GPIO Demo working again (except interrupts aren't working) * Update README with more OS packages needed A bare ubuntu-16.04.1-server installation could not run `make tools` without these packages. * bump openocd to get SCKDIV fix * Remove duplicated help text for run_debug target * Add package to README that is needed for openocd build Without this package I was seeing two different failures like below when running `make tools`. /home/scottj/freedom-e-sdk/openocd/configure: line 4533: syntax error near unexpected token `0.23' /home/scottj/freedom-e-sdk/openocd/configure: line 4533: `PKG_PROG_PKG_CONFIG(0.23)' Makefile:70: recipe for target '/home/scottj/freedom-e-sdk/toolchain/bin/openocd' failed make: *** [/home/scottj/freedom-e-sdk/toolchain/bin/openocd] Error 2 ... or ... + autoconf configure.ac:12: error: possibly undefined macro: AC_MSG_WARN If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation. configure.ac:240: error: possibly undefined macro: AC_MSG_NOTICE configure.ac:342: error: possibly undefined macro: AC_DEFINE Makefile:70: recipe for target '/home/scottj/freedom-e-sdk/toolchain/bin/openocd' failed make: *** [/home/scottj/freedom-e-sdk/toolchain/bin/openocd] Error 1 * Bump OpenOCD to not overwrite SCKDIV when flashing * Roll back CoreMark
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