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x86: add thread support

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Thread support is added for the x86 architecture. Both
the local apic and the tsc udelay() functions have a
call to thread_yield_microseconds() so as to provide an
opportunity to run pending threads.

Change-Id: Ie39b9eb565eb189676c06645bdf2a8720fe0636a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/3207
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Aaron Durbin
2013-05-06 12:22:23 -05:00
committed by Ronald G. Minnich
parent 4409a5eef6
commit 38c326d041
9 changed files with 140 additions and 1 deletions
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9
src/arch/x86/lib/c_start.S
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@ -10,6 +10,11 @@
_stack:
.space CONFIG_MAX_CPUS*CONFIG_STACK_SIZE
_estack:
#if CONFIG_COOP_MULTITASKING
.global thread_stacks
thread_stacks:
.space CONFIG_STACK_SIZE*CONFIG_NUM_THREADS
#endif
.section ".textfirst", "ax", @progbits
.code32
@ -45,6 +50,10 @@ _start:
/* set new stack */
movl $_estack, %esp
#if CONFIG_COOP_MULTITASKING
/* Push the thread pointer. */
pushl $0
#endif
/* Push the cpu index and struct cpu */
pushl $0
pushl $0