19c7765e37
Summary: There is currently a 1GB hole between user and kernel address spaces into which direct (1:1 PA:VA) device mappings go. This appears to go largely unused, leaving all devices to contend with the 128MB block at the end of the 32-bit space (0xf8000000-0xffffffff). This easily fills up, and needs to be densely packed. However, dense packing wastes precious TLB1 space, of which there are only 16 (e500v2) or 64(e5500) entries available. Change this by using the 1GB space for all device mappings, and allow the kernel to use the entire upper 1GB for KVA. This also allows us to use sparse device mappings, freeing up TLB entries. Test Plan: Boot tested on p5020. Differential Revision: https://reviews.freebsd.org/D5832 |
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_align.h | ||
_bus.h | ||
_inttypes.h | ||
_limits.h | ||
_stdint.h | ||
_types.h | ||
altivec.h | ||
asm.h | ||
atomic.h | ||
bat.h | ||
bus_dma.h | ||
bus.h | ||
clock.h | ||
counter.h | ||
cpu.h | ||
cpufunc.h | ||
db_machdep.h | ||
dbdma.h | ||
dump.h | ||
elf.h | ||
endian.h | ||
exec.h | ||
float.h | ||
floatingpoint.h | ||
fpu.h | ||
frame.h | ||
gdb_machdep.h | ||
hid.h | ||
ieee.h | ||
ieeefp.h | ||
in_cksum.h | ||
intr_machdep.h | ||
kdb.h | ||
limits.h | ||
machdep.h | ||
md_var.h | ||
memdev.h | ||
metadata.h | ||
mmuvar.h | ||
ofw_machdep.h | ||
openpicreg.h | ||
openpicvar.h | ||
param.h | ||
pcb.h | ||
pcpu.h | ||
pio.h | ||
platform.h | ||
platformvar.h | ||
pmap.h | ||
pmc_mdep.h | ||
proc.h | ||
profile.h | ||
psl.h | ||
pte.h | ||
ptrace.h | ||
reg.h | ||
reloc.h | ||
resource.h | ||
rtas.h | ||
runq.h | ||
sc_machdep.h | ||
setjmp.h | ||
sigframe.h | ||
signal.h | ||
slb.h | ||
smp.h | ||
spr.h | ||
sr.h | ||
stack.h | ||
stdarg.h | ||
sysarch.h | ||
tlb.h | ||
trap.h | ||
ucontext.h | ||
varargs.h | ||
vdso.h | ||
vm.h | ||
vmparam.h |