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| author | Sean Anderson <seanga2@gmail.com> | 2023-11-08 11:48:36 -0500 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-11-16 13:49:13 -0500 |
| commit | 517e70856f0fcbb9c84de0414430086bea0008ee (patch) | |
| tree | 36bc7dd2672f8c7c7910a1e9ee8570010bb28eed /common/spl | |
| parent | 06b1bca69d355f3f03f3607d03ee308e012ebed2 (diff) | |
| download | u-boot-517e70856f0fcbb9c84de0414430086bea0008ee.zip u-boot-517e70856f0fcbb9c84de0414430086bea0008ee.tar.gz u-boot-517e70856f0fcbb9c84de0414430086bea0008ee.tar.bz2 | |
spl: semihosting: Don't close fd before spl_load_simple_fit
On real hardware, semihosting calls tend to have a large constant
overhead (on the order of tens of milliseconds). Reduce the number of
calls by one by reusing the existing fd in smh_fit_read, and closing it
at the end of spl_smh_load_image.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/spl')
| -rw-r--r-- | common/spl/spl_semihosting.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/common/spl/spl_semihosting.c b/common/spl/spl_semihosting.c index f7dd289..8f11c29 100644 --- a/common/spl/spl_semihosting.c +++ b/common/spl/spl_semihosting.c @@ -24,18 +24,14 @@ static int smh_read_full(long fd, void *memp, size_t len) static ulong smh_fit_read(struct spl_load_info *load, ulong file_offset, ulong size, void *buf) { - long fd; + long fd = *(long *)load->priv; ulong ret; - fd = smh_open(load->filename, MODE_READ | MODE_BINARY); - if (fd < 0) { - log_debug("could not open %s: %ld\n", load->filename, fd); + if (smh_seek(fd, file_offset)) return 0; - } - ret = smh_read(fd, buf, size); - smh_close(fd); - return ret; + ret = smh_read(fd, buf, size); + return ret < 0 ? 0 : ret; } static int spl_smh_load_image(struct spl_image_info *spl_image, @@ -73,11 +69,11 @@ static int spl_smh_load_image(struct spl_image_info *spl_image, debug("Found FIT\n"); load.read = smh_fit_read; load.bl_len = 1; - load.filename = filename; - load.priv = NULL; - smh_close(fd); + load.filename = NULL; + load.priv = &fd; - return spl_load_simple_fit(spl_image, &load, 0, header); + ret = spl_load_simple_fit(spl_image, &load, 0, header); + goto out; } ret = spl_parse_image_header(spl_image, bootdev, header); |