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authorimp <imp@FreeBSD.org>2004-10-15 00:15:07 +0000
committerimp <imp@FreeBSD.org>2004-10-15 00:15:07 +0000
commita76b21d1d4525da5833d6ee1cee37363bd8023eb (patch)
treea2890b26a0deecb974452e4c2ee4978abcc1ffd3 /sys/boot/common
parent2049409c03d600b774240447e86bc11889166ce5 (diff)
downloadFreeBSD-src-a76b21d1d4525da5833d6ee1cee37363bd8023eb.zip
FreeBSD-src-a76b21d1d4525da5833d6ee1cee37363bd8023eb.tar.gz
Document hw.{pci,acpi}.host_start_mem
Requested by: ru@
Diffstat (limited to 'sys/boot/common')
-rw-r--r--sys/boot/common/loader.89
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/boot/common/loader.8 b/sys/boot/common/loader.8
index 6fb6b76..538c678 100644
--- a/sys/boot/common/loader.8
+++ b/sys/boot/common/loader.8
@@ -429,6 +429,15 @@ are also accepted and indicate kilobytes, megabytes and gigabytes
respectively.
An invalid suffix will result in the variable being ignored by the
kernel.
+.It Va hw.pci.host_start_mem, hw.acpi.host_start_mem
+When not otherwise constrained, this limits the memory start
+address.
+The default is 0x80000000 and should be set to at least size of the
+memory and not conflict with other resources.
+Typically, only systems without pci bridges need to set this variable
+since pci bridges typically constrain the memory starting address
+(and the variable is only used when bridges don't constrain this
+address).
.It Va hw.pci.enable_io_modes
Enable PCI resources which are left off by some BIOSes or are not
enabled correctly by the device driver.
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