table of contents
| ARCH_PHYS_WC_ADD(9) | Hardware Interfaces | ARCH_PHYS_WC_ADD(9) |
NAME¶
arch_phys_wc_add - add a WC MTRR and handle errors if PAT is unavailable
SYNOPSIS¶
int arch_phys_wc_add(unsigned long base, unsigned long size);
ARGUMENTS¶
base
Physical base address
size
Size of region
DESCRIPTION¶
If PAT is available, this does nothing. If PAT is unavailable, it attempts to add a WC MTRR covering size bytes starting at base and logs an error if this fails.
Drivers must store the return value to pass to mtrr_del_wc_if_needed, but drivers should not try to interpret that return value.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |