delta/syslinux.git/core/timer.inc, branch multifs

Merge tag 'syslinux-5.00' into firmware

2012-12-07T11:33:45+00:00

Conflicts:
	Makefile
	com32/elflink/ldlinux/Makefile
	com32/lib/sys/module/elf_module.c
	core/cleanup.c
	core/comboot.inc
	core/conio.c
	core/fs/fs.c
	core/init.c
	core/mem/free.c
	core/mem/malloc.c
	core/timer.inc
	diag/geodsp/Makefile
	extlinux/main.c
	mk/embedded.mk
	modules/Makefile

Signed-off-by: Matt Fleming

Symbol export whitelist

2012-12-05T22:41:32+00:00

Before modules were dynamically loaded the boundary between GPL and
non-GPL code was implicit because of the separate link domains for
each module. With dynamic modules we need an explicit whitelist of
core symbols that non-GPL code can link against at runtime without
needing to be re-licensed under the GPL.

Mark such symbols with __export, so that it is explicitly clear which
symbols in the core can be linked against by non-GPL code.

Reduce the visibility of symbols in both the core and ldlinux.c32 with
-fvisibility=hidden. __export changes the visibility to 'default'.

Signed-off-by: Matt Fleming

core: Add firmware backend support

2011-12-16T16:31:18+00:00

In an upcoming patch series we're going to need to abstract the
firmware operations because they will be provided by both BIOS and
EFI.

Signed-off-by: Matt Fleming

core: Reimplement lots asm code in C

2011-12-01T13:14:05+00:00

There is an awful lot of code currently implemented in assembly when
it could just as easily be implemented in C. Having it in C makes it
much easier to share code between the BIOS and forthcoming EFI
firmware backend. The following code fragments have been rewritten,

  - timer initialisation
  - adjust_screen()
  - check_esapes() and mem_init()
  - conio.inc
  - plaincon.inc
  - cleanup.inc
  - serirq.inc
  - font.inc
  - graphics
  - writehex

Signed-off-by: Matt Fleming

core: add a ms-denominated timer

2010-07-05T22:41:36+00:00

Add a timer denominated in milliseconds.  This is still driven by the
18.2 Hz timer interrupt, but counts "real" milliseconds, including
handing the adjustment factor (which in reality means it advances by
55 for most timer ticks and 54 for some.)

Signed-off-by: H. Peter Anvin

core: move __jiffies and _IdleTimer to .data16

2010-03-30T23:31:47+00:00

Move the __jiffies and _IdleTimer variables to the .data16 segment.
This ensures that if do_idle is invoked very early that it will not
jump off into a non-existent idle routine.

Signed-off-by: H. Peter Anvin

core: make sure __jiffies is aligned

2009-09-03T05:28:38+00:00

__jiffies really wants to be aligned.  We're not SMP, so technically
it will be atomic anyway.  Still...

Signed-off-by: H. Peter Anvin

core: hook INT 1Ch for a simple monotonic timer

2009-09-03T00:44:32+00:00

The BIOS_timer variable at 4C6h is somewhat unreliable... it is
documented to wrap at "midnight", norminally after 1627419 ticks
(0x18d51b), which is a rather awkward number to deal with modulo.
Instead, hook the INT 1Ch secondary timer interrupt and just count a
simple incrementing variable.

Signed-off-by: H. Peter Anvin