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user_io: file i/o optimization.

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This commit is contained in:
sorgelig
2021-04-04 00:47:02 +08:00
parent c9c431d0e8
commit 7930c2f9db
1 changed files with 14 additions and 8 deletions
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22
user_io.cpp
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@@ -2637,7 +2637,8 @@ void user_io_poll()
while (1)
{
static uint8_t buffer[4][512];
const int buf_sz = 16;
static uint8_t buffer[4][buf_sz * 512];
uint32_t lba;
uint16_t req_type = 0;
uint16_t c = user_io_sd_get_status(&lba, &req_type);
@@ -2725,16 +2726,20 @@ void user_io_poll()
//printf("SD RD %d on %d, WIDE=%d\n", lba, disk, fio_size);
int done = 0;
if ((buffer_lba[disk] == (uint64_t)-1) || lba != buffer_lba[disk])
uint32_t offset;
if ((buffer_lba[disk] == (uint64_t)-1) || lba < buffer_lba[disk] || lba >(buffer_lba[disk] + buf_sz - 1))
{
buffer_lba[disk] = -1;
if (sd_image[disk].size)
{
diskled_on();
if (FileSeekLBA(&sd_image[disk], lba))
{
if (FileReadAdv(&sd_image[disk], buffer[disk], 512) == 512)
if (FileReadAdv(&sd_image[disk], buffer[disk], sizeof(buffer[disk])))
{
done = 1;
buffer_lba[disk] = lba;
}
}
}
@@ -2768,10 +2773,11 @@ void user_io_poll()
}
}
buffer_lba[disk] = lba;
offset = 0;
}
else
{
offset = (lba - buffer_lba[disk])*512;
done = 1;
}
@@ -2780,19 +2786,19 @@ void user_io_poll()
// data is now stored in buffer. send it to fpga
EnableIO();
spi_w(UIO_SECTOR_RD | ((c & 4) ? 0 : ((disk + 1) << 8)));
spi_block_write(buffer[disk], fio_size);
spi_block_write(buffer[disk] + offset, fio_size);
DisableIO();
if (sd_image[disk].type == 2)
{
buffer_lba[disk] = -1;
}
else if(done)
else if(done && (lba == (buffer_lba[disk] + buf_sz - 1)))
{
diskled_on();
if (FileReadAdv(&sd_image[disk], buffer[disk], 512) == 512)
if (FileReadAdv(&sd_image[disk], buffer[disk], sizeof(buffer[disk])))
{
buffer_lba[disk]++;
buffer_lba[disk] += buf_sz;
}
else
{