Hi Mike, On Fri, Aug 19, 2011 at 3:28 PM, Mike Frysinger <vap...@gentoo.org> wrote: > On Friday, August 19, 2011 17:25:10 Simon Glass wrote: >> On Fri, Aug 19, 2011 at 3:15 PM, Mike Frysinger wrote: >> > On Friday, August 19, 2011 15:28:48 Simon Glass wrote: >> >> This adds a new SPI flash command which only rewrites blocks if the >> >> contents need to change. This can speed up SPI flash programming when >> >> much of the data is unchanged from what is already there. >> > >> > looks good to me. i'll give it a spin on a board of mine and then push >> > into my sf branch. i really should write a spi flash simulation so i >> > could just test this from gdb ... >> >> Funny you should say that. I rather badly need a way of testing the >> higher level U-Boot code (from the commands down to where it calls >> architecture/driver code). I am drafting up an email to send to the >> list with some thoughts on the matter. > > when i wrote the blackfin system level port of the gnu sim, it was so i could > do this (and i thought it'd be bad-ass). i often use the gnu sim to do > initial testing (sometimes down to the driver level) before i get around to > loading up on actual hardware. > > $ bfin-elf-run --env operating --model bf537 ./u-boot > > > U-Boot 2011.06-00375-g23ffb39-dirty (Aug 14 2011 - 16:54:03) > > CPU: ADSP bf537-0.2 (Detected Rev: 0.0) (bypass boot) > Board: ADI BF537 stamp board > Support: http://blackfin.uclinux.org/ > Clock: VCO: 500 MHz, Core: 500 MHz, System: 125 MHz > RAM: 64 MiB > Flash: ## Unknown flash on Bank 1 - Size = 0x00000000 = 0 MB > 0 Bytes > MMC: > *** Warning - bad CRC, using default environment > > In: serial > Out: serial > Err: serial > KGDB: [on serial] ready > Warning: Generating 'random' MAC address > Net: bfin_mac > Hit any key to stop autoboot: 5 0 > bfin> help sf > sf - SPI flash sub-system > > Usage: > sf probe [bus:]cs [hz] [mode] - init flash device on given SPI bus > and chip select > sf read addr offset len - read `len' bytes starting at > `offset' to memory at `addr' > sf write addr offset len - write `len' bytes from memory > at `addr' to flash at `offset' > sf erase offset [+]len - erase `len' bytes from `offset' > `+len' round up `len' to block size > bfin> > -mike >
That's a great trick. How much of the drivers did you implement in the simulator? How about this, running native under Linux: $ ./u-boot U-Boot 2011.03-00793-g0463aab-dirty (Aug 23 2011 - 14:56:06) DRAM: 128 MiB Using default environment In: serial Out: lcd Err: lcd =>sf probe 0 sf probe 0 SF: Detected test with page size 256, total 4 MiB 4096 KiB test at 0:0 is now current device =>sf read 0 0 0x2000 sf read 0 0 0x2000 =>md 0 md 0 00000000: 282c36b2 17938d43 d7dcbdfd 362e4362 .6,(C.......bC.6 00000010: 00000000 00000000 00000000 00000000 ................ 00000020: 00020001 0000000f 0000000b 00400000 ..............@. 00000030: 00000004 00000003 00000003 00000003 ................ 00000040: 00000003 00000000 00000116 00000000 ................ 00000050: 00000000 00000000 00000116 00000000 ................ 00000060: 00000000 00000000 00000116 00000000 ................ 00000070: 00000000 00000000 00000116 00000000 ................ 00000080: 00000000 00000002 00000003 00000008 ................ 00000090: 00000000 0000001a 000002f8 00000000 ................ 000000a0: 0000012c 00000002 00000000 e0a61818 ,............... 000000b0: 00000000 00000000 0000000b 00000026 ............&... 000000c0: 00000008 00000003 00000004 00000004 ................ 000000d0: 00000002 0000000b 00000003 00000003 ................ 000000e0: 00000002 00000001 00000003 00000004 ................ 000000f0: 00000003 00000009 0000000c 0000059f ................ =>^C $ Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
