9c2ff3eefe
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.
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/* sleep.c - Command to wait a specified number of seconds. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/term.h>
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#include <grub/time.h>
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/normal.h>
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#include <grub/machine/time.h>
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static const struct grub_arg_option options[] =
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{
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{"verbose", 'v', 0, "verbose countdown", 0, 0},
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{"interruptible", 'i', 0, "interruptible with ESC", 0, 0},
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{0, 0, 0, 0, 0, 0}
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};
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static grub_uint8_t x, y;
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static void
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do_print (int n)
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{
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grub_gotoxy (x, y);
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/* NOTE: Do not remove the trailing space characters.
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They are required to clear the line. */
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grub_printf ("%d ", n);
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}
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/* Based on grub_millisleep() from kern/generic/millisleep.c. */
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static int
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grub_interruptible_millisleep (grub_uint32_t ms)
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{
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grub_uint64_t start;
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start = grub_get_time_ms ();
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while (grub_get_time_ms () - start < ms)
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if (grub_checkkey () >= 0 &&
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GRUB_TERM_ASCII_CHAR (grub_getkey ()) == GRUB_TERM_ESC)
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return 1;
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return 0;
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}
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static grub_err_t
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grub_cmd_sleep (struct grub_arg_list *state, int argc, char **args)
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{
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grub_uint16_t xy;
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int n;
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if (argc != 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "missing operand");
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n = grub_strtoul (args[0], 0, 10);
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if (n == 0)
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{
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/* Either `0' or broken input. */
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return 0;
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}
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xy = grub_getxy ();
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x = xy >> 8;
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y = xy & 0xff;
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for (; n; n--)
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{
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if (state[0].set)
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do_print (n);
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if (state[1].set)
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{
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if (grub_interruptible_millisleep (1000))
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return 1;
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}
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else
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grub_millisleep (1000);
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}
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if (state[0].set)
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do_print (0);
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return 0;
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}
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GRUB_MOD_INIT(sleep)
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{
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grub_register_command ("sleep", grub_cmd_sleep, GRUB_COMMAND_FLAG_BOTH,
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"sleep NUMBER_OF_SECONDS", "Wait for a specified number of seconds", options);
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}
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GRUB_MOD_FINI(sleep)
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{
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grub_unregister_command ("sleep");
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}
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