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Date: Mon, 7 Jan 2008 17:41:01 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Pavel Machek <pavel@....cz>
Cc: kernel list <linux-kernel@...r.kernel.org>,
Linux-pm mailing list <linux-pm@...ts.osdl.org>,
Ingo Molnar <mingo@...e.hu>
Subject: Re: Unify arch/x86/kernel/acpi/sleep*.c
On Monday, 7 of January 2008, Pavel Machek wrote:
> Unify arch/x86/kernel/acpi/sleep*.c
>
> Pretty trivial unification; when two functions differed, it was
> usually in error handling, and better of the two was picked up.
>
> Signed-off-by: Pavel Machek <pavel@...e.cz>
Looks-okay-to: Rafael J. Wysocki <rjw@...k.pl>
> ---
>
> (Seems to work on i386, but needs some x86-64 testing.)
I'll test it later today.
> commit f540777f36d35da3ac43a76f73d66400e4024763
> tree 28b02babaf0c597e1ea25bda9df96825ae94ef9e
> parent dc9f39b93dc9e4ddddeaa25c2f7ec3e0a4ec830a
> author Pavel <pavel@....ucw.cz> Mon, 07 Jan 2008 13:21:49 +0100
> committer Pavel <pavel@....ucw.cz> Mon, 07 Jan 2008 13:21:49 +0100
>
> arch/x86/kernel/acpi/Makefile | 2 -
> arch/x86/kernel/acpi/sleep.c | 87 +++++++++++++++++++++++++++++
> arch/x86/kernel/acpi/sleep_32.c | 70 -----------------------
> arch/x86/kernel/acpi/sleep_64.c | 117 ---------------------------------------
> 4 files changed, 88 insertions(+), 188 deletions(-)
>
> diff --git a/arch/x86/kernel/acpi/Makefile b/arch/x86/kernel/acpi/Makefile
> index 1351c39..19d3d6e 100644
> --- a/arch/x86/kernel/acpi/Makefile
> +++ b/arch/x86/kernel/acpi/Makefile
> @@ -1,5 +1,5 @@
> obj-$(CONFIG_ACPI) += boot.o
> -obj-$(CONFIG_ACPI_SLEEP) += sleep_$(BITS).o wakeup_$(BITS).o
> +obj-$(CONFIG_ACPI_SLEEP) += sleep.o wakeup_$(BITS).o
>
> ifneq ($(CONFIG_ACPI_PROCESSOR),)
> obj-y += cstate.o processor.o
> diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
> new file mode 100644
> index 0000000..26db0c1
> --- /dev/null
> +++ b/arch/x86/kernel/acpi/sleep.c
> @@ -0,0 +1,87 @@
> +/*
> + * sleep.c - x86-specific ACPI sleep support.
> + *
> + * Copyright (C) 2001-2003 Patrick Mochel
> + * Copyright (C) 2001-2003 Pavel Machek <pavel@...e.cz>
> + */
> +
> +#include <linux/acpi.h>
> +#include <linux/bootmem.h>
> +#include <linux/dmi.h>
> +#include <linux/cpumask.h>
> +
> +#include <asm/smp.h>
> +
> +/* address in low memory of the wakeup routine. */
> +unsigned long acpi_wakeup_address = 0;
> +unsigned long acpi_realmode_flags;
> +extern char wakeup_start, wakeup_end;
> +
> +extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
> +
> +/**
> + * acpi_save_state_mem - save kernel state
> + *
> + * Create an identity mapped page table and copy the wakeup routine to
> + * low memory.
> + */
> +int acpi_save_state_mem(void)
> +{
> + if (!acpi_wakeup_address) {
> + printk(KERN_ERR "Could not allocate memory during boot, S3 disabled\n");
> + return -ENOMEM;
> + }
> + memcpy((void *)acpi_wakeup_address, &wakeup_start,
> + &wakeup_end - &wakeup_start);
> + acpi_copy_wakeup_routine(acpi_wakeup_address);
> +
> + return 0;
> +}
> +
> +/*
> + * acpi_restore_state - undo effects of acpi_save_state_mem
> + */
> +void acpi_restore_state_mem(void)
> +{
> +}
> +
> +
> +/**
> + * acpi_reserve_bootmem - do _very_ early ACPI initialisation
> + *
> + * We allocate a page from the first 1MB of memory for the wakeup
> + * routine for when we come back from a sleep state. The
> + * runtime allocator allows specification of <16MB pages, but not
> + * <1MB pages.
> + */
> +void __init acpi_reserve_bootmem(void)
> +{
> + if ((&wakeup_end - &wakeup_start) > PAGE_SIZE*2) {
> + printk(KERN_ERR
> + "ACPI: Wakeup code way too big, S3 disabled.\n");
> + return;
> + }
> +
> + acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
> + if (!acpi_wakeup_address)
> + printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
> +}
> +
> +
> +static int __init acpi_sleep_setup(char *str)
> +{
> + while ((str != NULL) && (*str != '\0')) {
> + if (strncmp(str, "s3_bios", 7) == 0)
> + acpi_realmode_flags |= 1;
> + if (strncmp(str, "s3_mode", 7) == 0)
> + acpi_realmode_flags |= 2;
> + if (strncmp(str, "s3_beep", 7) == 0)
> + acpi_realmode_flags |= 4;
> + str = strchr(str, ',');
> + if (str != NULL)
> + str += strspn(str, ", \t");
> + }
> + return 1;
> +}
> +
> +__setup("acpi_sleep=", acpi_sleep_setup);
> diff --git a/arch/x86/kernel/acpi/sleep_32.c b/arch/x86/kernel/acpi/sleep_32.c
> index 1069948..63fe552 100644
> --- a/arch/x86/kernel/acpi/sleep_32.c
> +++ b/arch/x86/kernel/acpi/sleep_32.c
> @@ -12,76 +12,6 @@ #include <linux/cpumask.h>
>
> #include <asm/smp.h>
>
> -/* address in low memory of the wakeup routine. */
> -unsigned long acpi_wakeup_address = 0;
> -unsigned long acpi_realmode_flags;
> -extern char wakeup_start, wakeup_end;
> -
> -extern unsigned long FASTCALL(acpi_copy_wakeup_routine(unsigned long));
> -
> -/**
> - * acpi_save_state_mem - save kernel state
> - *
> - * Create an identity mapped page table and copy the wakeup routine to
> - * low memory.
> - */
> -int acpi_save_state_mem(void)
> -{
> - if (!acpi_wakeup_address)
> - return 1;
> - memcpy((void *)acpi_wakeup_address, &wakeup_start,
> - &wakeup_end - &wakeup_start);
> - acpi_copy_wakeup_routine(acpi_wakeup_address);
> -
> - return 0;
> -}
> -
> -/*
> - * acpi_restore_state - undo effects of acpi_save_state_mem
> - */
> -void acpi_restore_state_mem(void)
> -{
> -}
> -
> -/**
> - * acpi_reserve_bootmem - do _very_ early ACPI initialisation
> - *
> - * We allocate a page from the first 1MB of memory for the wakeup
> - * routine for when we come back from a sleep state. The
> - * runtime allocator allows specification of <16MB pages, but not
> - * <1MB pages.
> - */
> -void __init acpi_reserve_bootmem(void)
> -{
> - if ((&wakeup_end - &wakeup_start) > PAGE_SIZE) {
> - printk(KERN_ERR
> - "ACPI: Wakeup code way too big, S3 disabled.\n");
> - return;
> - }
> -
> - acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE);
> - if (!acpi_wakeup_address)
> - printk(KERN_ERR "ACPI: Cannot allocate lowmem, S3 disabled.\n");
> -}
> -
> -static int __init acpi_sleep_setup(char *str)
> -{
> - while ((str != NULL) && (*str != '\0')) {
> - if (strncmp(str, "s3_bios", 7) == 0)
> - acpi_realmode_flags |= 1;
> - if (strncmp(str, "s3_mode", 7) == 0)
> - acpi_realmode_flags |= 2;
> - if (strncmp(str, "s3_beep", 7) == 0)
> - acpi_realmode_flags |= 4;
> - str = strchr(str, ',');
> - if (str != NULL)
> - str += strspn(str, ", \t");
> - }
> - return 1;
> -}
> -
> -__setup("acpi_sleep=", acpi_sleep_setup);
> -
> /* Ouch, we want to delete this. We already have better version in userspace, in
> s2ram from suspend.sf.net project */
> static __init int reset_videomode_after_s3(const struct dmi_system_id *d)
> diff --git a/arch/x86/kernel/acpi/sleep_64.c b/arch/x86/kernel/acpi/sleep_64.c
> deleted file mode 100644
> index da42de2..0000000
> --- a/arch/x86/kernel/acpi/sleep_64.c
> +++ /dev/null
> @@ -1,117 +0,0 @@
> -/*
> - * acpi.c - Architecture-Specific Low-Level ACPI Support
> - *
> - * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@...el.com>
> - * Copyright (C) 2001 Jun Nakajima <jun.nakajima@...el.com>
> - * Copyright (C) 2001 Patrick Mochel <mochel@...l.org>
> - * Copyright (C) 2002 Andi Kleen, SuSE Labs (x86-64 port)
> - * Copyright (C) 2003 Pavel Machek, SuSE Labs
> - *
> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> - *
> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> - */
> -
> -#include <linux/kernel.h>
> -#include <linux/init.h>
> -#include <linux/types.h>
> -#include <linux/stddef.h>
> -#include <linux/slab.h>
> -#include <linux/pci.h>
> -#include <linux/bootmem.h>
> -#include <linux/acpi.h>
> -#include <linux/cpumask.h>
> -
> -#include <asm/mpspec.h>
> -#include <asm/io.h>
> -#include <asm/apic.h>
> -#include <asm/apicdef.h>
> -#include <asm/page.h>
> -#include <asm/pgtable.h>
> -#include <asm/pgalloc.h>
> -#include <asm/io_apic.h>
> -#include <asm/proto.h>
> -#include <asm/tlbflush.h>
> -
> -/* --------------------------------------------------------------------------
> - Low-Level Sleep Support
> - -------------------------------------------------------------------------- */
> -
> -/* address in low memory of the wakeup routine. */
> -unsigned long acpi_wakeup_address = 0;
> -unsigned long acpi_realmode_flags;
> -extern char wakeup_start, wakeup_end;
> -
> -extern unsigned long acpi_copy_wakeup_routine(unsigned long);
> -
> -/**
> - * acpi_save_state_mem - save kernel state
> - *
> - * Create an identity mapped page table and copy the wakeup routine to
> - * low memory.
> - */
> -int acpi_save_state_mem(void)
> -{
> - memcpy((void *)acpi_wakeup_address, &wakeup_start,
> - &wakeup_end - &wakeup_start);
> - acpi_copy_wakeup_routine(acpi_wakeup_address);
> -
> - return 0;
> -}
> -
> -/*
> - * acpi_restore_state
> - */
> -void acpi_restore_state_mem(void)
> -{
> -}
> -
> -/**
> - * acpi_reserve_bootmem - do _very_ early ACPI initialisation
> - *
> - * We allocate a page in low memory for the wakeup
> - * routine for when we come back from a sleep state. The
> - * runtime allocator allows specification of <16M pages, but not
> - * <1M pages.
> - */
> -void __init acpi_reserve_bootmem(void)
> -{
> - acpi_wakeup_address = (unsigned long)alloc_bootmem_low(PAGE_SIZE*2);
> - if ((&wakeup_end - &wakeup_start) > (PAGE_SIZE*2))
> - printk(KERN_CRIT
> - "ACPI: Wakeup code way too big, will crash on attempt"
> - " to suspend\n");
> -}
> -
> -static int __init acpi_sleep_setup(char *str)
> -{
> - while ((str != NULL) && (*str != '\0')) {
> - if (strncmp(str, "s3_bios", 7) == 0)
> - acpi_realmode_flags |= 1;
> - if (strncmp(str, "s3_mode", 7) == 0)
> - acpi_realmode_flags |= 2;
> - if (strncmp(str, "s3_beep", 7) == 0)
> - acpi_realmode_flags |= 4;
> - str = strchr(str, ',');
> - if (str != NULL)
> - str += strspn(str, ", \t");
> - }
> - return 1;
> -}
> -
> -__setup("acpi_sleep=", acpi_sleep_setup);
> -
--
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