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2008-08-05 Colin D Bennett <colin@gibibit.com>

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High resolution timer support.  Implemented for x86 CPUs using TSC.
	Extracted generic grub_millisleep() so it's linked in only as needed.
	This requires a Pentium compatible CPU; if the RDTSC instruction is
	not supported, then it falls back on the generic grub_get_time_ms()
	implementation that uses the machine's RTC.

	* conf/i386-pc.rmk (kernel_img_SOURCES): Add `kern/time.c',
	`kern/i386/tsc.c', `kern/generic/rtc_get_time_ms.c' and
	`kern/generic/millisleep.c'.

	* conf/i386-efi.rmk (kernel_mod_SOURCES): Add `kern/i386/tsc.c',
	`kern/generic/rtc_get_time_ms.c' and `kern/generic/millisleep.c'.

	* conf/x86_64-efi.rml (kernel_mod_SOURCES): Add
	`kern/generic/millisleep.c' and `kern/generic/rtc_get_time_ms.c'.

	* conf/sparc64-ieee1275.rmk (kernel_elf_SOURCES): Likewise.

	* conf/powerpc-ieee1275.rmk (kernel_elf_SOURCES): Add
	`kern/generic/millisleep.c'.

	* conf/i386-ieee1275.rmk (kernel_elf_SOURCES): Likewise.

	* conf/i386-coreboot.rmk (kernel_elf_SOURCES): Add `kern/time.c'.

	* kern/generic/rtc_get_time_ms.c: New file.

	* kern/generic/millisleep.c: New file.
 	
	* kern/misc.c: Don't include
	<kern/time.h> anymore.
	(grub_millisleep_generic): Removed.

	* commands/sleep.c (grub_interruptible_millisleep): Uses
	grub_get_time_ms() instead of grub_get_rtc().

	* include/grub/i386/tsc.h (grub_get_tsc): New file.  New inline
	function.
	(grub_cpu_is_cpuid_supported): New inline function.
	(grub_cpu_is_tsc_supported): New inline function.
	(grub_tsc_init): New function prototype.
	(grub_tsc_get_time_ms): New function prototype.

	* kern/i386/tsc.c (grub_get_time_ms): New file.

	* include/grub/time.h: Include <grub/types.h.
	(grub_millisleep_generic): Removed.
	(grub_get_time_ms): New prototype.
	(grub_install_get_time_ms): New prototype.
	(grub_rtc_get_time_ms): New prototype.

	* kern/time.c (grub_get_time_ms): New function.
	(grub_install_get_time_ms): New function.

	* kern/i386/efi/init.c: Include <grub/cpu/tsc.h>.  Don't include
	<grub/time.h> anymore.
	(grub_millisleep): Removed.
	(grub_machine_init): Call grub_tsc_init.

	* kern/i386/linuxbios/init.c (grub_machine_init): Install the RTC
	get_time_ms() implementation.

	* kern/sparc64/ieee1275/init.c (grub_millisleep): Removed.
	(ieee1275_get_time_ms): New function.
	(grub_machine_init): Install get_time_ms() implementation.

	* kern/i386/pc/init.c: Include <grub/cpu/tsc.h>.
	(grub_machine_init): Call grub_tsc_init().
	(grub_millisleep): Removed.
 
	* kern/ieee1275/init.c (grub_millisleep): Removed.
	(grub_machine_init): Install ieee1275_get_time_ms()
	implementation.
	(ieee1275_get_time_ms): New function.
	(grub_get_rtc): Now calls ieee1275_get_time_ms(), which does the
	real work.
This commit is contained in:
marco_g 2008-08-05 11:54:37 +00:00
parent 9ec92aaf1f
commit 9c2ff3eefe
16 changed files with 133 additions and 48 deletions
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12
commands/sleep.c
View file

@ -43,15 +43,15 @@ do_print (int n)
grub_printf ("%d ", n);
}
/* Based on grub_millisleep() from kern/misc.c. */
/* Based on grub_millisleep() from kern/generic/millisleep.c. */
static int
grub_interruptible_millisleep (grub_uint32_t ms)
{
grub_uint32_t end_at;
end_at = grub_get_rtc () + grub_div_roundup (ms * GRUB_TICKS_PER_SECOND, 1000);
while (grub_get_rtc () < end_at)
grub_uint64_t start;
start = grub_get_time_ms ();
while (grub_get_time_ms () - start < ms)
if (grub_checkkey () >= 0 &&
GRUB_TERM_ASCII_CHAR (grub_getkey ()) == GRUB_TERM_ESC)
return 1;