freedom-e-sdk - my bad beginner RISC-V assembly LED blinking code.

Age	Commit message (Collapse)	Author
2017-11-17	Speed up Dhrystone on the HiFive1	Palmer 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.
2017-07-26	changed synch trap entry to match other vectors	Drew Barbier

2017-07-26	removed save/restore of x18	Drew Barbier

2017-07-26	only save/restore caller registers on trap entry	Drew Barbier

2017-07-26	fixed TRAP_EXIT macro. TRAP_ENTRY/EXIT2 only saves/restores callee	Drew Barbier
	registers
2017-07-25	too many .aling 2's	Drew Barbier

2017-07-25	added vectored interrupt example	Drew Barbier

2017-06-14	Add a SMP example	Palmer Dabbelt
	This just prints "hello world" on two cores. It contains an example of how to initialize a multi-core system using IPIs, and a simple spin lock.
2017-06-14	Call puts instead of printf when printing constants	Palmer Dabbelt
	printf doesn't fit in the scratchpad, but since there's really no reason to call it on constant strings it can be replaced with puts. With this change, the "hello" example fits in the scratchpad.
2017-06-14	Add linker scripts that target the scratchpad	Palmer 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.
2017-06-14	New Freedom Studio Examples (#66)	Megan Wachs
	* examples ported to ilg build plugin * project cleanup * CoreplexIP-E31 ilg projects * E51FPGA ilg projects * Tested Debug * debug launch files * E31 Debug Launch Files * removed typo project * E51 launch files. Forgotten E31 File * Missing coreplexip files * examples ported to ilg build plugin * project cleanup * CoreplexIP-E31 ilg projects * E51FPGA ilg projects * Tested Debug * debug launch files * E31 Debug Launch Files * removed typo project * E51 launch files. Forgotten E31 File * Missing coreplexip files * starting fresh * HiFive1 demo_gpio and libwrap * hifive1 hello * debug launchers for hello and demo_gpio * hifive1 led_fade * led_fade: Since E300 Arty Dev Kit doesn't have a PRCI, the led_fade demo doesn't really work on it. * update include paths to ease generating stand-alone zips * Adding E51 Examples * E51 demo launch files * E31 Demos * E31 demo launch files
2017-06-10	Just lump all the RAM sections together	Palmer 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.
2017-06-09	Use the correct global pointer symbol	Palmer Dabbelt

2017-06-09	Don't use .section\nALIGN, reorder sdata and srodata	Palmer 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.
2017-06-09	Don't call _{init,fini} in start.S, we call libc_{init,fini}_arry	Palmer Dabbelt

2017-06-09	Print the exit codes as unsigned numbers	Palmer Dabbelt
	Without this I get a message that looks like Program has exited with code 0x/0000008 which doesn't make any sense. This prints Progam has exited with code:0x80000008
2017-06-08	Specify alignment on the .sdata and .srodata sections	Palmer 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.
2017-05-08	revert back	Drew Barbier

2017-05-07	changed write_hex to new def	Drew Barbier

2017-05-07	Merge remote-tracking branch 'origin/master' into freedom-studio	Drew Barbier

2017-05-05	coreplex-e51: Correct width of MCAUSE	mwachs5

2017-05-05	write_hex: allow for different size error codes	Megan Wachs

2017-05-05	coreplexip-e51-arty: MCAUSE is XLEN-bits wide.	Megan Wachs

2017-05-05	updated demo_gpio	Drew Barbier

2017-05-04	Update SDK For E31/E51 Coreplex IP Evaluation	Megan Wachs

2017-02-02	prci: Clean up the hfrosc-driven-pll FPU testing.	Megan Wachs

2017-02-02	prci: Simplify the targeted f_cpu function by measuring HFROSC frequency ↵	Megan Wachs
	first, then using it as the PLL source. This is also safer as it is less risk of using PLL out of its range.
2017-02-01	PRCI: This doesn't exist on the Arty and potentially other devices, so ↵	Megan Wachs
	exclude it if there is not PRCI_BASE_ADDR on the system.
2017-02-01	PRCI: add control for the target CPU frequency (to allow a minimum, maximum, ↵	Megan Wachs
	or closest match)
2017-02-01	Additional PRCI driver support. Make the code usable by C++ programs as well.	Megan Wachs

2017-01-31	add a 'driver' common PRCI functions.	Megan Wachs

2017-01-31	Move plic_driver code to a common location.	Megan Wachs

2017-01-24	Use consistent OpenOCD config for Arty and HiFive1	Megan Wachs

2017-01-11	reduce code duplication and apply the same flags to Arty board	mwachs5

2017-01-11	Add the 'bootloader' which ships on HiFive1 Boards.	mwachs5

2017-01-05	Merge pull request #38 from sifive/benchmarking	Andrew Waterman
	Benchmarking
2017-01-03	Regularize timing code	Andrew 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.
2017-01-03	Improve HiFive1 CPU frequency measurement routine	Andrew 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.
2017-01-03	Keep mtvec 4-byte aligned	Andrew Waterman

2016-12-24	Bump OpenOCD to pick up corrected malloc in Flashing code. Add 'verify' to ↵	mwachs5
	ensure Flash is loaded correctly.
2016-12-20	Separate .text.unlikely and .text.startup from .text	Andrew Waterman
	This improves the instruction stream's spatial locality.
2016-12-20	Avoid jal to weak symbols	Andrew Waterman
	The symbol may be overridden and end up out of range of JAL.
2016-12-20	Pass argc and argv to main()	Andrew Waterman

2016-12-17	Merge pull request #29 from sifive/remove_srst_delay	Megan Wachs
	Remove unncessary srst delay when connecting with OpenOCD to HiFive1
2016-12-17	Remove unncessary srst delay when connecting with OpenOCD to HiFive1	Megan Wachs

2016-12-17	Correct init/fini functions for Arty Dev Kit	Megan Wachs

2016-12-14	Move start.S and entry.S to a common directory	Albert Ou

2016-12-14	Merge pull request #25 from sifive/add_srst_option	Megan Wachs
	hifive1: Update OpenOCD Config script to optionally allow pulsing SRST
2016-12-14	hifive1: Update OpenOCD Config script to optionally allow pulsing SRST	Megan Wachs

2016-12-14	Refactor libc stubs into libwrap	Albert 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.