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/openbsd/sys/arch/amd64/stand/libsa/
H A Dbiosdev.hdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)
H A Dbiosdev.cdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)
/openbsd/sys/arch/i386/stand/libsa/
H A Dbiosdev.hdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)
H A Dbiosdev.cdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)
/openbsd/sys/arch/amd64/include/
H A Dbiosvar.hdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)
/openbsd/sys/arch/i386/include/
H A Dbiosvar.hdiff 9730fd37 Mon Mar 14 22:14:40 GMT 2011 krw <krw@openbsd.org> Clamp BIOS io attempts to < 2 ^28 - 1 sectors (a.k.a. 128GB for
512-byte sectors) as some BIOSen get confused when we ask for sectors
higher up.

Uss u_int throughout the boot code to calculate sector addresses,
since 32 bits is enough to do 28 ^ 1 - 1 arithmetic. Add checks
for wraparound.

I can now install and boot from the 7th extended partition below
128GB.

Much feedback & guidance from deraadt@. Also from weingart@ on
BIOS io.

ok deraadt@ (less a couple of minor tweaks found in testing)