From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750871AbVH1B1u (ORCPT ); Sat, 27 Aug 2005 21:27:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750868AbVH1B1u (ORCPT ); Sat, 27 Aug 2005 21:27:50 -0400 Received: from ns2.osuosl.org ([140.211.166.131]:43949 "EHLO ns2.osuosl.org") by vger.kernel.org with ESMTP id S1750743AbVH1B1t (ORCPT ); Sat, 27 Aug 2005 21:27:49 -0400 Message-ID: <43111313.8000800@engr.orst.edu> Date: Sat, 27 Aug 2005 18:27:47 -0700 From: Michael Marineau User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050729) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andrew Morton , benh@kernel.crashing.org CC: Pavel Machek , linux-kernel@vger.kernel.org Subject: [PATCH 1/3] Generic acpi vgapost References: <43111298.80507@engr.orst.edu> In-Reply-To: <43111298.80507@engr.orst.edu> X-Enigmail-Version: 0.92.0.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigFC382B997D3237A84E008414" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigFC382B997D3237A84E008414 Content-Type: multipart/mixed; boundary="------------090304000102030406040304" This is a multi-part message in MIME format. --------------090304000102030406040304 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Generic function to post the video bios. Based directly on the original patch by Ole Rohne. Signed-off-by: Michael Marineau -- Michael Marineau marineam@engr.orst.edu Oregon State University --------------090304000102030406040304 Content-Type: text/x-patch; name="acpi-vgapost.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="acpi-vgapost.patch" Index: linux-2.6.13-rc7/arch/i386/kernel/acpi/sleep.c =================================================================== --- linux-2.6.13-rc7.orig/arch/i386/kernel/acpi/sleep.c +++ linux-2.6.13-rc7/arch/i386/kernel/acpi/sleep.c @@ -5,6 +5,7 @@ * Copyright (C) 2001-2003 Pavel Machek */ +#include #include #include #include @@ -56,6 +57,34 @@ void acpi_restore_state_mem (void) zap_low_mappings(); } +/* + * acpi_vgapost + */ + +extern void do_vgapost_lowlevel (unsigned long); + +void acpi_vgapost (unsigned long slot) +{ + unsigned long flags, saved_video_flags = acpi_video_flags; + + acpi_video_flags = (slot & 0xffff) << 16 | 1; + + /* Map low memory and copy information */ + init_low_mapping(swapper_pg_dir, USER_PTRS_PER_PGD); + memcpy((void *) acpi_wakeup_address, &wakeup_start, &wakeup_end - &wakeup_start); + acpi_copy_wakeup_routine(acpi_wakeup_address); + + /* Tunnel thru real mode */ + local_irq_save(flags); + do_vgapost_lowlevel(acpi_wakeup_address); + local_irq_restore(flags); + + /* Restore mapping etc */ + zap_low_mappings(); + acpi_video_flags = saved_video_flags; +} +EXPORT_SYMBOL (acpi_vgapost); + /** * acpi_reserve_bootmem - do _very_ early ACPI initialisation * Index: linux-2.6.13-rc7/arch/i386/kernel/acpi/wakeup.S =================================================================== --- linux-2.6.13-rc7.orig/arch/i386/kernel/acpi/wakeup.S +++ linux-2.6.13-rc7/arch/i386/kernel/acpi/wakeup.S @@ -171,6 +171,32 @@ check_vesa: _setbad: jmp setbad +# +# Real mode switch - verbatim from reboot.c +# +go_real: + movl %cr0, %eax + andl $0x00000011, %eax + orl $0x60000000, %eax + movl %eax, %cr0 + movl %eax, %cr3 + movl %cr0, %ebx + andl $0x60000000, %ebx + jz 1f + wbinvd +1: andb $0x10, %al + movl %eax, %cr0 +go_real_jmp: .byte 0xea +go_real_jmp_off: .word 0x0000 +go_real_jmp_seg: .word 0x0000 +# +# Real mode descriptor table +# + .align 8 +go_real_desc: .quad 0x0000000000000000 +go_real_cseg: .quad 0x00009a000000ffff +go_real_dseg: .quad 0x000092000000ffff + .code32 ALIGN @@ -310,6 +336,59 @@ ENTRY(do_suspend_lowlevel_s4bios) call acpi_enter_sleep_state_s4bios ret +ENTRY(do_vgapost_lowlevel) + # Convert target offset to physical address + movl %eax, %ecx + subl $__PAGE_OFFSET, %ecx + # Fixup GDT pointer + movl %ecx, %edx + addl $go_real_desc - wakeup_start, %edx + movl %edx, go_real_gdt + 2 + # Fixup 16-bit CS descriptor + movl %ecx, %edx + movw %dx, go_real_cseg - wakeup_start + 2 (%eax) + shrl $16, %edx + movb %dl, go_real_cseg - wakeup_start + 4 (%eax) + movb %dh, go_real_cseg - wakeup_start + 7 (%eax) + # Fixup 16-bit jump + movl %ecx, %edx + shrl $4, %edx + movw %dx, go_real_jmp_seg - wakeup_start (%eax) + # Save state and registers + call save_processor_state + call save_registers + # Reload page table with low mapping + movl $swapper_pg_dir-__PAGE_OFFSET, %eax + movl %eax, %cr3 + # Load IDTR and GDTR for real mode + lidt go_real_idt + lgdt go_real_gdt + # Load DS & al + movl $0x0010, %eax + movl %eax, %ss + movl %eax, %ds + movl %eax, %es + movl %eax, %fs + movl %eax, %gs + # Load CS + call $0x0008, $(go_real - wakeup_start) + # Phony return code + call restore_registers + call restore_processor_state + ret + + .align 4 + .word 0 +go_real_idt: + .word 0x3ff + .long 0 + + .align 4 + .word 0 +go_real_gdt: + .word 3*8-1 + .long 0 + ALIGN # saved registers saved_gdt: .long 0,0 --------------090304000102030406040304-- --------------enigFC382B997D3237A84E008414 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDERMTiP+LossGzjARAqpuAKCXy1iaphmHJJCsWPzgLC/9XvedgwCcDIYR ZhwHEst/+JZMidtyWHeEpKI= =+53f -----END PGP SIGNATURE----- --------------enigFC382B997D3237A84E008414--