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refactoring pci_find_classcode()

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Markus Fröschle
2016-12-05 21:26:54 +00:00
parent 812da0c9ae
commit 0cdad1241c
1 changed files with 6 additions and 3 deletions
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9
pci/pci.c
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@@ -506,14 +506,17 @@ int32_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
static bool match_classcode(uint32_t handle, uint32_t classcode)
{
uint8_t find_mask = (classcode >> 24) & 0xff;
uint32_t value = swpl(pci_read_config_longword(handle, PCICCR));
uint32_t value = pci_read_config_longword(handle, PCICCR);
int i;
for (i = 2; i >= 0; i--) /* loop through mask */
dbg("classcode=0x%08x, value=0x%08x\r\n", classcode, value);
for (i = 0; i < 3; i++) /* loop through mask */
{
if ((find_mask >> i) & 1)
{
if (! (value >> (i * 8)) == (classcode >> (i * 8)))
dbg("compare 0x%02x against 0x%02x\r\n", (value >> (i * 8)) & 0xff, (classcode >> (i * 8)) & 0xff);
if (! (((value >> (i * 8)) & 0xff) == ((classcode >> (i * 8)) & 0xff)))
return false;
}
}