From patchwork Sun Mar 13 22:03:55 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthieu Castet X-Patchwork-Id: 632171 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p2DM4AcQ021796 for ; Sun, 13 Mar 2011 22:04:10 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752366Ab1CMWEH (ORCPT ); Sun, 13 Mar 2011 18:04:07 -0400 Received: from smtp6-g21.free.fr ([212.27.42.6]:45648 "EHLO smtp6-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241Ab1CMWEG (ORCPT ); Sun, 13 Mar 2011 18:04:06 -0400 Received: from [192.168.1.234] (unknown [81.57.151.96]) by smtp6-g21.free.fr (Postfix) with ESMTP id 9BD3F8231D; Sun, 13 Mar 2011 23:03:56 +0100 (CET) Message-ID: <4D7D3F4B.2070801@free.fr> Date: Sun, 13 Mar 2011 23:03:55 +0100 From: matthieu castet User-Agent: Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.8.1.23) Gecko/20090823 SeaMonkey/1.1.18 MIME-Version: 1.0 To: Linux Kernel list , linux-acpi@vger.kernel.org, x86@kernel.org CC: "Rafael J. Wysocki" , "H. Peter Anvin" Subject: [PATCH 1/2] merge 32 and 64 realmode wakeup code Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sun, 13 Mar 2011 22:04:10 +0000 (UTC) diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S index ead21b6..150a734 100644 --- a/arch/x86/kernel/acpi/realmode/wakeup.S +++ b/arch/x86/kernel/acpi/realmode/wakeup.S @@ -93,36 +93,10 @@ wakeup_code: /* Do any other stuff... */ -#ifndef CONFIG_64BIT - /* This could also be done in C code... */ - movl pmode_cr3, %eax - movl %eax, %cr3 - - movl pmode_cr4, %ecx - jecxz 1f - movl %ecx, %cr4 -1: - movl pmode_efer, %eax - movl pmode_efer + 4, %edx - movl %eax, %ecx - orl %edx, %ecx - jz 1f - movl $MSR_EFER, %ecx - wrmsr -1: - - lgdtl pmode_gdt - - /* This really couldn't... */ - movl pmode_cr0, %eax - movl %eax, %cr0 - jmp pmode_return -#else pushw $0 pushw trampoline_segment pushw $0 lret -#endif bogus_real_magic: 1: diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c index 4572c58..58a0b4b 100644 --- a/arch/x86/kernel/acpi/sleep.c +++ b/arch/x86/kernel/acpi/sleep.c @@ -20,7 +20,7 @@ unsigned long acpi_realmode_flags; -#if defined(CONFIG_SMP) && defined(CONFIG_64BIT) +#if defined(CONFIG_SMP) static char temp_stack[4096]; #endif @@ -67,33 +67,26 @@ int acpi_save_state_mem(void) header->wakeup_gdt[2] = GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff); -#ifndef CONFIG_64BIT - store_gdt((struct desc_ptr *)&header->pmode_gdt); - - if (rdmsr_safe(MSR_EFER, &header->pmode_efer_low, - &header->pmode_efer_high)) - header->pmode_efer_low = header->pmode_efer_high = 0; -#endif /* !CONFIG_64BIT */ - header->pmode_cr0 = read_cr0(); header->pmode_cr4 = read_cr4_safe(); header->realmode_flags = acpi_realmode_flags; header->real_magic = 0x12345678; - -#ifndef CONFIG_64BIT - header->pmode_entry = (u32)&wakeup_pmode_return; - header->pmode_cr3 = (u32)__pa(&initial_page_table); - saved_magic = 0x12345678; -#else /* CONFIG_64BIT */ header->trampoline_segment = trampoline_address() >> 4; #ifdef CONFIG_SMP stack_start = (unsigned long)temp_stack + sizeof(temp_stack); early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(smp_processor_id()); +#ifdef CONFIG_64BIT initial_gs = per_cpu_offset(smp_processor_id()); #endif +#endif + +#ifndef CONFIG_64BIT + initial_code = (unsigned long)&wakeup_pmode_return; + saved_magic = 0x12345678; +#else initial_code = (unsigned long)wakeup_long64; - saved_magic = 0x123456789abcdef0L; + saved_magic = 0x123456789abcdef0L; #endif /* CONFIG_64BIT */ return 0; diff --git a/arch/x86/kernel/trampoline_32.S b/arch/x86/kernel/trampoline_32.S index 451c0a7..a726f60 100644 --- a/arch/x86/kernel/trampoline_32.S +++ b/arch/x86/kernel/trampoline_32.S @@ -32,8 +32,6 @@ #include #include -#ifdef CONFIG_SMP - .section ".x86_trampoline","a" .balign PAGE_SIZE .code16 @@ -79,5 +77,3 @@ ENTRY(trampoline_status) .globl trampoline_end trampoline_end: - -#endif /* CONFIG_SMP */