/*
* This function is expected to be called in a critical section since it
* changes the per-cpu pci config space va-to-pa mappings.
*/
static vm_offset_t
zbpci_config_space_va(int bus, int slot, int func, int reg, int bytes)
{
int cpu;
vm_offset_t va_page;
vm_paddr_t pa, pa_page;
if (bus <= PCI_BUSMAX && slot <= PCI_SLOTMAX && func <= PCI_FUNCMAX &&
reg <= PCI_REGMAX && (bytes == 1 || bytes == 2 || bytes == 4) &&
((reg & (bytes - 1)) == 0)) {
cpu = PCPU_GET(cpuid);
va_page = zbpci_config_space[cpu].vaddr;
pa = CFG_PADDR_BASE |
(bus << 16) | (slot << 11) | (func << 8) | reg;
#if _BYTE_ORDER == _BIG_ENDIAN
pa = pa ^ (4 - bytes);
#endif
pa_page = rounddown2(pa, PAGE_SIZE);
if (zbpci_config_space[cpu].paddr != pa_page) {
pmap_kremove(va_page);
pmap_kenter_attr(va_page, pa_page, PTE_C_UNCACHED);
zbpci_config_space[cpu].paddr = pa_page;
}
return (va_page + (pa - pa_page));
} else {
return (0);
}
}
void
bs_remap_earlyboot(void)
{
int i;
vm_offset_t pa, spa, va;
vm_memattr_t ma;
for (i = 0; i < earlyboot_map_idx; i++) {
spa = earlyboot_mappings[i].addr;
if (spa == earlyboot_mappings[i].virt &&
pmap_dev_direct_mapped(spa, earlyboot_mappings[i].size) == 0)
continue;
ma = VM_MEMATTR_DEFAULT;
switch (earlyboot_mappings[i].flags) {
case BUS_SPACE_MAP_CACHEABLE:
ma = VM_MEMATTR_CACHEABLE;
break;
case BUS_SPACE_MAP_PREFETCHABLE:
ma = VM_MEMATTR_PREFETCHABLE;
break;
}
pa = trunc_page(spa);
va = trunc_page(earlyboot_mappings[i].virt);
while (pa < spa + earlyboot_mappings[i].size) {
pmap_kenter_attr(va, pa, ma);
va += PAGE_SIZE;
pa += PAGE_SIZE;
}
}
}
