Re: [SeaBIOS] [PATCH 4/4] stacks: There is no need to disable NMI if it is already disabled

On Tue, May 16, 2017 at 06:27:03PM +0200, Paolo Bonzini wrote: > On 16/05/2017 18:14, Kevin O'Connor wrote: > > Don't write to the cmos index port on a mode switch if NMI is already > > disabled. This reduces the number of outb() calls. > > > > Signed-off-by: Kevin O'Connor

Re: [SeaBIOS] [PATCH 4/4] stacks: There is no need to disable NMI if it is already disabled

On 16/05/2017 18:14, Kevin O'Connor wrote: > Don't write to the cmos index port on a mode switch if NMI is already > disabled. This reduces the number of outb() calls. > > Signed-off-by: Kevin O'Connor > --- > src/stacks.c | 13 + > 1 file changed, 9

[SeaBIOS] [PATCH 2/4] stacks: Make sure to initialize Call16Data

Initialize the Call16Data at startup - otherwise some early yield() calls may check for interrupts without using the preferred A20 setting. Signed-off-by: Kevin O'Connor --- src/stacks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/stacks.c b/src/stacks.c index

[SeaBIOS] [PATCH 3/4] stacks: Don't update the A20 settings if they haven't changed

The A20 setting is almost always enabled - only issue an outb() if the A20 is actually changing. This reduces the number of outb() calls. Signed-off-by: Kevin O'Connor --- src/fw/smm.c | 6 -- src/stacks.c | 4 +++- src/x86.h| 7 --- 3 files changed, 11

[SeaBIOS] [PATCH 1/4] smm: Backup and restore A20 on an SMI based mode switch

QEMU does not store the A20 setting in the SMM cpu environment area (and it does not look like real CPUs do either). So, manually backup and restore A20 on a mode switch. Signed-off-by: Kevin O'Connor --- src/fw/smm.c | 9 - 1 file changed, 8 insertions(+), 1

Re: [SeaBIOS] ia16 gcc port - handy for SeaBIOS?

On Di, 2017-05-16 at 15:39 +0200, Rudolf Marek wrote: > Hi all, > > Perhaps you already noticed. There are efforts to resurrect true 16-bit only > x86 > GCC port [1][2]. I added it coreboot cross toolchain script. > > https://review.coreboot.org/#/c/19711/ > > You can compile it ./buildgcc

[SeaBIOS] ia16 gcc port - handy for SeaBIOS?

Hi all, Perhaps you already noticed. There are efforts to resurrect true 16-bit only x86 GCC port [1][2]. I added it coreboot cross toolchain script. https://review.coreboot.org/#/c/19711/ You can compile it ./buildgcc -j4 -p ia16-elf So far, I only tried to compile some simple programs, but