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Refactor linuxGetIOSize and linuxGetSizes. Eliminate the unnecessary

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optimization in the search loop.
This commit is contained in:
Ian Romanick 2006-07-06 12:48:51 -07:00
parent 704e645207
commit 8d07ee070e
1 changed files with 23 additions and 36 deletions
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59
hw/xfree86/os-support/bus/linuxPci.c
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@ -421,7 +421,7 @@ xf86GetPciHostConfigFromTag(PCITAG Tag)
*
* Please keep this table in ascending vendor/device order.
*/
static struct pciSizes {
static const struct pciSizes {
unsigned short vendor, device;
unsigned long io_size, mem_size;
} pciControllerSizes[] = {
@ -444,9 +444,12 @@ static struct pciSizes {
};
#define NUM_SIZES (sizeof(pciControllerSizes) / sizeof(pciControllerSizes[0]))
static unsigned long
linuxGetIOSize(PCITAG Tag)
static const struct pciSizes *
linuxGetSizesStruct(PCITAG Tag)
{
static const struct pciSizes default_size = {
0, 0, 1U << 16, (unsigned long)(1ULL << 32)
};
pciConfigPtr pPCI;
int i;
@ -454,47 +457,31 @@ linuxGetIOSize(PCITAG Tag)
if ((pPCI = xf86GetPciHostConfigFromTag(Tag))) {
/* Look up vendor/device */
for (i = 0; i < NUM_SIZES; i++) {
if (pPCI->pci_vendor > pciControllerSizes[i].vendor)
continue;
if (pPCI->pci_vendor < pciControllerSizes[i].vendor)
break;
if (pPCI->pci_device > pciControllerSizes[i].device)
continue;
if (pPCI->pci_device < pciControllerSizes[i].device)
break;
return pciControllerSizes[i].io_size;
if ((pPCI->pci_vendor == pciControllerSizes[i].vendor)
&& (pPCI->pci_device == pciControllerSizes[i].device)) {
return & pciControllerSizes[i];
}
}
}
return 1U << 16; /* Default to 64K */
/* Default to 64KB I/O and 4GB memory. */
return & default_size;
}
static void
static __inline__ unsigned long
linuxGetIOSize(PCITAG Tag)
{
const struct pciSizes * const sizes = linuxGetSizesStruct(Tag);
return sizes->io_size;
}
static __inline__ void
linuxGetSizes(PCITAG Tag, unsigned long *io_size, unsigned long *mem_size)
{
pciConfigPtr pPCI;
int i;
const struct pciSizes * const sizes = linuxGetSizesStruct(Tag);
*io_size = (1U << 16); /* Default to 64K */
*mem_size = (unsigned long)(1ULL << 32); /* Default to 4G */
/* Find host bridge */
if ((pPCI = xf86GetPciHostConfigFromTag(Tag))) {
/* Look up vendor/device */
for (i = 0; i < NUM_SIZES; i++) {
if (pPCI->pci_vendor > pciControllerSizes[i].vendor)
continue;
if (pPCI->pci_vendor < pciControllerSizes[i].vendor)
break;
if (pPCI->pci_device > pciControllerSizes[i].device)
continue;
if (pPCI->pci_device < pciControllerSizes[i].device)
break;
*io_size = pciControllerSizes[i].io_size;
*mem_size = pciControllerSizes[i].mem_size;
break;
}
}
*io_size = sizes->io_size;
*mem_size = sizes->mem_size;
}
_X_EXPORT int