From 79da18f86945784eb3b7134ee0abcaa71231d517 Mon Sep 17 00:00:00 2001 From: Namyoon Woo Date: Thu, 27 Aug 2020 16:27:49 -0700 Subject: support 4-byte address format for VARIABLE_SIZE dummy flash device This patch adds a support of 4-byte address format for VARIABLE_SIZE dummy flash device, so that it can emulate an flash size larger than 16 MBytes. - assigned a feature bits FEATURE_4BA to VARIABLE_SIZE flash config. - added codes handling two commands, JEDEC_READ_4BA and JEDEC_BYTE_PROGRAM_4BA. - changed blockeraser to use Chip-Erase command so that it can be free from flash address byte format. TEST=ran the command line below: $ flashrom -p dummy:image=${TMP_FILE},size=33554432, \ emulate=VARIABLE_SIZE -w ${IMG_32MB} -V -f $ flashrom -p dummy:image=${TMP_FILE},size=16777216, \ emulate=VARIABLE_SIZE -w ${IMG_16MB} -V -f $ flashrom -p dummy:image=${TMP_FILE},size=8388608, \ emulate=VARIABLE_SIZE -w ${IMG_8MB} -V -f Signed-off-by: Namyoon Woo Change-Id: Ia59eecfcbe798d50f8dacea98c3c508edf8ec77e Reviewed-on: https://review.coreboot.org/c/flashrom/+/44881 Reviewed-by: Edward O'Callaghan Tested-by: build bot (Jenkins) --- dummyflasher.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) (limited to 'dummyflasher.c') diff --git a/dummyflasher.c b/dummyflasher.c index 145fe11d..85908afd 100644 --- a/dummyflasher.c +++ b/dummyflasher.c @@ -686,6 +686,13 @@ static int emulate_spi_chip_response(unsigned int writecnt, if (readcnt > 0) memcpy(readarr, flashchip_contents + offs, readcnt); break; + case JEDEC_READ_4BA: + offs = writearr[1] << 24 | writearr[2] << 16 | writearr[3] << 8 | writearr[4]; + /* Truncate to emu_chip_size. */ + offs %= emu_chip_size; + if (readcnt > 0) + memcpy(readarr, flashchip_contents + offs, readcnt); + break; case JEDEC_BYTE_PROGRAM: offs = writearr[1] << 16 | writearr[2] << 8 | writearr[3]; /* Truncate to emu_chip_size. */ @@ -701,6 +708,21 @@ static int emulate_spi_chip_response(unsigned int writecnt, memcpy(flashchip_contents + offs, writearr + 4, writecnt - 4); emu_modified = 1; break; + case JEDEC_BYTE_PROGRAM_4BA: + offs = writearr[1] << 24 | writearr[2] << 16 | writearr[3] << 8 | writearr[4]; + /* Truncate to emu_chip_size. */ + offs %= emu_chip_size; + if (writecnt < 6) { + msg_perr("BYTE PROGRAM size too short!\n"); + return 1; + } + if (writecnt - 5 > emu_max_byteprogram_size) { + msg_perr("Max BYTE PROGRAM size exceeded!\n"); + return 1; + } + memcpy(flashchip_contents + offs, writearr + 5, writecnt - 5); + emu_modified = 1; + break; case JEDEC_AAI_WORD_PROGRAM: if (!emu_max_aai_size) break; @@ -949,8 +971,8 @@ int probe_variable_size(struct flashctx *flash) if (!eraser->block_erase) break; - eraser->eraseblocks[0].count = emu_chip_size / - eraser->eraseblocks[0].size; + eraser->eraseblocks[0].count = 1; + eraser->eraseblocks[0].size = emu_chip_size; msg_cdbg("%s: eraser.size=%d, .count=%d\n", __func__, eraser->eraseblocks[0].size, eraser->eraseblocks[0].count); -- cgit v1.2.3