From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755081AbZEOW2j (ORCPT ); Fri, 15 May 2009 18:28:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755572AbZEOW2Q (ORCPT ); Fri, 15 May 2009 18:28:16 -0400 Received: from mail-px0-f123.google.com ([209.85.216.123]:40459 "EHLO mail-px0-f123.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752304AbZEOW2P (ORCPT ); Fri, 15 May 2009 18:28:15 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:reply-to:to:cc:content-type:organization:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=CxEryEG7R3etPMDV0nzWbjAzjBWM6BmFMarxRXn1yocF1tlfZhc9tRiuKpVNotGNOW GpPTkZOIYwCfUa4i3tbdOixwiwumpVpBoBtQNCT8GU4/h1MxEwWPOuBkVnf7yOHOdGB0 fllPENLKRHJvGvb+Hh2+UcNMhS3Vh4xdHeKE0= Subject: [PATCH 25/30] loongson: Hibernation Support in mips system From: Wu Zhangjin Reply-To: wuzhangjin@gmail.com To: linux-mips@linux-mips.org, Ralf Baechle , linux-kernel@vger.kernel.org Cc: Arnaud Patard , loongson-dev@googlegroups.com, zhangfx@lemote.com, yanh@lemote.com, Philippe Vachon , Zhang Le , Erwan Lerale Content-Type: text/plain Organization: DSLab, Lanzhou University, China Date: Sat, 16 May 2009 06:28:08 +0800 Message-Id: <1242426488.10164.173.camel@falcon> Mime-Version: 1.0 X-Mailer: Evolution 2.24.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>From d4776f4891b9be96d357910f62d9ebaf898a3015 Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Sat, 16 May 2009 04:51:26 +0800 Subject: [PATCH 25/30] loongson: Hibernation Support in mips system --- arch/mips/Kconfig | 3 + arch/mips/Makefile | 3 + arch/mips/include/asm/suspend.h | 2 + arch/mips/kernel/asm-offsets.c | 13 ++++++ arch/mips/power/Makefile | 1 + arch/mips/power/cpu.c | 48 ++++++++++++++++++++++++ arch/mips/power/hibernate.S | 78 +++++++++++++++++++++++++++++++++++++++ include/linux/suspend.h | 2 +- 8 files changed, 149 insertions(+), 1 deletions(-) create mode 100644 arch/mips/power/Makefile create mode 100644 arch/mips/power/cpu.c create mode 100644 arch/mips/power/hibernate.S diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 68c12de..b14e866 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2130,6 +2130,9 @@ endmenu menu "Power management options" +config ARCH_HIBERNATION_POSSIBLE + def_bool y + config ARCH_SUSPEND_POSSIBLE def_bool y depends on !SMP diff --git a/arch/mips/Makefile b/arch/mips/Makefile index d73f084..8bde363 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -677,6 +677,9 @@ core-y += arch/mips/kernel/ arch/mips/mm/ arch/mips/math-emu/ drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/ +# suspend and hibernation support +drivers-$(CONFIG_PM) += arch/mips/power/ + ifdef CONFIG_LASAT rom.bin rom.sw: vmlinux $(Q)$(MAKE) $(build)=arch/mips/lasat/image $@ diff --git a/arch/mips/include/asm/suspend.h b/arch/mips/include/asm/suspend.h index 2562f8f..1d44287 100644 --- a/arch/mips/include/asm/suspend.h +++ b/arch/mips/include/asm/suspend.h @@ -3,4 +3,6 @@ /* Somewhen... Maybe :-) */ +static inline int arch_prepare_suspend(void) { return 0; } + #endif /* __ASM_SUSPEND_H */ diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index c901c22..94964f5 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -326,3 +327,15 @@ void output_octeon_cop2_state_defines(void) BLANK(); } #endif + +#ifdef CONFIG_HIBERNATION +void output_pbe_defines(void) +{ + COMMENT(" Linux struct pbe offsets. "); + OFFSET(PBE_ADDRESS , pbe, address); + OFFSET(PBE_ORIG_ADDRESS , pbe, orig_address); + OFFSET(PBE_NEXT , pbe, next); + DEFINE(PBE_SIZE , sizeof(struct pbe)); + BLANK(); +} +#endif diff --git a/arch/mips/power/Makefile b/arch/mips/power/Makefile new file mode 100644 index 0000000..73d56b8 --- /dev/null +++ b/arch/mips/power/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_HIBERNATION) += cpu.o hibernate.o diff --git a/arch/mips/power/cpu.c b/arch/mips/power/cpu.c new file mode 100644 index 0000000..b799bfe --- /dev/null +++ b/arch/mips/power/cpu.c @@ -0,0 +1,48 @@ +/* + * Suspend support specific for mips. + * + */ +#include +#include +#include +#include + +/* References to section boundaries */ +extern const void __nosave_begin, __nosave_end; +static uint32_t saved_status; +unsigned long + saved_ra, + saved_sp, + saved_fp, + saved_gp, + saved_s0, + saved_s1, + saved_s2, + saved_s3, + saved_s4, + saved_s5, + saved_s6, + saved_s7, + saved_a0, + saved_a1, + saved_a2, + saved_a3, + saved_v0, + saved_v1; + +void save_processor_state(void) +{ + saved_status = read_c0_status(); +} + +void restore_processor_state(void) +{ + write_c0_status(saved_status); +} + +int pfn_is_nosave(unsigned long pfn) +{ + unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT; + unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end)) >> PAGE_SHIFT; + return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); +} diff --git a/arch/mips/power/hibernate.S b/arch/mips/power/hibernate.S new file mode 100644 index 0000000..e45ec45 --- /dev/null +++ b/arch/mips/power/hibernate.S @@ -0,0 +1,78 @@ +#incldue +#include +#include +#include + +.text +LEAF(swsusp_arch_suspend) + PTR_LA t0, saved_ra + PTR_S ra, (t0) + PTR_LA t0, saved_sp + PTR_S sp, (t0) + PTR_LA t0, saved_fp + PTR_S fp, (t0) + PTR_LA t0, saved_gp + PTR_S gp, (t0) + PTR_LA t0, saved_s0 + PTR_S s0, (t0) + PTR_LA t0, saved_s1 + PTR_S s1, (t0) + PTR_LA t0, saved_s2 + PTR_S s2, (t0) + PTR_LA t0, saved_s3 + PTR_S s3, (t0) + PTR_LA t0, saved_s4 + PTR_S s4, (t0) + PTR_LA t0, saved_s5 + PTR_S s5, (t0) + PTR_LA t0, saved_s6 + PTR_S s6, (t0) + PTR_LA t0, saved_s7 + PTR_S s7, (t0) + PTR_LA t0, saved_a0 + PTR_S a0, (t0) + PTR_LA t0, saved_a1 + PTR_S a1, (t0) + PTR_LA t0, saved_a2 + PTR_S a2, (t0) + PTR_LA t0, saved_v1 + PTR_S v1, (t0) + j swsusp_save + nop +END(swsusp_arch_suspend) + +LEAF(swsusp_arch_resume) + PTR_L t0, restore_pblist +0: + PTR_L t1, PBE_ADDRESS(t0) /* source */ + PTR_L t2, PBE_ORIG_ADDRESS(t0) /* destination */ + PTR_ADDIU t3, t1, _PAGE_SIZE +1: + REG_L t8, (t1) + REG_S t8, (t2) + PTR_ADDIU t1, t1, SZREG + PTR_ADDIU t2, t2, SZREG + bne t1, t3, 1b + PTR_L t0, PBE_NEXT(t0) + bnez t0, 0b + //flush cache and tlb. no need?I am not sure. + PTR_L ra, saved_ra + PTR_L sp, saved_sp + PTR_L fp, saved_fp + PTR_L s0, saved_s0 + PTR_L s1, saved_s1 + PTR_L s2, saved_s2 + PTR_L s3, saved_s3 + PTR_L s4, saved_s4 + PTR_L s5, saved_s5 + PTR_L s6, saved_s6 + PTR_L s7, saved_s7 + PTR_L a0, saved_a0 + PTR_L a1, saved_a1 + PTR_L a2, saved_a2 + PTR_L a3, saved_a3 + PTR_LI v0, 0x0 + PTR_L v1, saved_v1 + jr ra + nop +END(swsusp_arch_resume) diff --git a/include/linux/suspend.h b/include/linux/suspend.h index c7d9bb1..4ed4879 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -1,7 +1,7 @@ #ifndef _LINUX_SUSPEND_H #define _LINUX_SUSPEND_H -#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) +#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) || defined(CONFIG_MIPS) #include #endif #include -- 1.6.2.1