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| author | Namyoon Woo <namyoon@google.com> | 2020-08-28 07:56:00 -0700 |
|---|---|---|
| committer | Edward O'Callaghan <quasisec@chromium.org> | 2020-09-07 00:53:38 +0000 |
| commit | 84fc9e889d91276761a7d9c3fe9f7a763615a013 (patch) | |
| tree | 57b4cf55f3cb8a0de515ffaf869bb249df5e9779 /dummyflasher.c | |
| parent | 3149822cd45cb2e5841e15d648783748ba1b2ec6 (diff) | |
| download | flashrom-84fc9e889d91276761a7d9c3fe9f7a763615a013.tar.gz flashrom-84fc9e889d91276761a7d9c3fe9f7a763615a013.tar.bz2 flashrom-84fc9e889d91276761a7d9c3fe9f7a763615a013.zip | |
dummyflasher.c: Only write back emulated image if modified
When the image is not modified, there is no point in writing it back.
In fact we may not have file permissions to do so.
Signed-off-by: Namyoon Woo <namyoon@google.com>
Change-Id: I3bf2d7edb28a9a1e5406b67a88a0ee6e07db83e3
Reviewed-on: https://review.coreboot.org/c/flashrom/+/44907
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'dummyflasher.c')
| -rw-r--r-- | dummyflasher.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/dummyflasher.c b/dummyflasher.c index b2b3b54d..145fe11d 100644 --- a/dummyflasher.c +++ b/dummyflasher.c @@ -50,6 +50,7 @@ enum emu_chip { static enum emu_chip emu_chip = EMULATE_NONE; static char *emu_persistent_image = NULL; static unsigned int emu_chip_size = 0; +static int emu_modified = 0; /* is the image modified since reading it? */ #if EMULATE_SPI_CHIP static unsigned int emu_max_byteprogram_size = 0; static unsigned int emu_max_aai_size = 0; @@ -137,7 +138,7 @@ static int dummy_shutdown(void *data) msg_pspew("%s\n", __func__); #if EMULATE_CHIP if (emu_chip != EMULATE_NONE) { - if (emu_persistent_image) { + if (emu_persistent_image && emu_modified) { msg_pdbg("Writing %s\n", emu_persistent_image); write_buf_to_file(flashchip_contents, emu_chip_size, emu_persistent_image); free(emu_persistent_image); @@ -698,6 +699,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, return 1; } memcpy(flashchip_contents + offs, writearr + 4, writecnt - 4); + emu_modified = 1; break; case JEDEC_AAI_WORD_PROGRAM: if (!emu_max_aai_size) @@ -734,6 +736,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, memcpy(flashchip_contents + aai_offs, writearr + 1, 2); aai_offs += 2; } + emu_modified = 1; break; case JEDEC_WRDI: if (emu_max_aai_size) @@ -755,6 +758,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, msg_pdbg("Unaligned SECTOR ERASE 0x20: 0x%x\n", offs); offs &= ~(emu_jedec_se_size - 1); memset(flashchip_contents + offs, 0xff, emu_jedec_se_size); + emu_modified = 1; break; case JEDEC_BE_52: if (!emu_jedec_be_52_size) @@ -772,6 +776,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, msg_pdbg("Unaligned BLOCK ERASE 0x52: 0x%x\n", offs); offs &= ~(emu_jedec_be_52_size - 1); memset(flashchip_contents + offs, 0xff, emu_jedec_be_52_size); + emu_modified = 1; break; case JEDEC_BE_D8: if (!emu_jedec_be_d8_size) @@ -789,6 +794,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, msg_pdbg("Unaligned BLOCK ERASE 0xd8: 0x%x\n", offs); offs &= ~(emu_jedec_be_d8_size - 1); memset(flashchip_contents + offs, 0xff, emu_jedec_be_d8_size); + emu_modified = 1; break; case JEDEC_CE_60: if (!emu_jedec_ce_60_size) @@ -804,6 +810,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, /* JEDEC_CE_60_OUTSIZE is 1 (no address) -> no offset. */ /* emu_jedec_ce_60_size is emu_chip_size. */ memset(flashchip_contents, 0xff, emu_jedec_ce_60_size); + emu_modified = 1; break; case JEDEC_CE_C7: if (!emu_jedec_ce_c7_size) @@ -819,6 +826,7 @@ static int emulate_spi_chip_response(unsigned int writecnt, /* JEDEC_CE_C7_OUTSIZE is 1 (no address) -> no offset. */ /* emu_jedec_ce_c7_size is emu_chip_size. */ memset(flashchip_contents, 0xff, emu_jedec_ce_c7_size); + emu_modified = 1; break; case JEDEC_SFDP: if (emu_chip != EMULATE_MACRONIX_MX25L6436) |