/* * Copyright (C) 2014 Freescale Semiconductor, Inc. * * Author: Jun Li * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __DRIVERS_USB_CHIPIDEA_OTG_FSM_H #define __DRIVERS_USB_CHIPIDEA_OTG_FSM_H #include /* * A-DEVICE timing constants */ /* Wait for VBUS Rise */ #define TA_WAIT_VRISE (100) /* a_wait_vrise: section 7.1.2 * a_wait_vrise_tmr: section 7.4.5.1 * TA_VBUS_RISE <= 100ms, section 4.4 * Table 4-1: Electrical Characteristics * ->DC Electrical Timing */ /* Wait for VBUS Fall */ #define TA_WAIT_VFALL (1000) /* a_wait_vfall: section 7.1.7 * a_wait_vfall_tmr: section: 7.4.5.2 */ /* Wait for B-Connect */ #define TA_WAIT_BCON (10000) /* a_wait_bcon: section 7.1.3 * TA_WAIT_BCON: should be between 1100 * and 30000 ms, section 5.5, Table 5-1 */ /* A-Idle to B-Disconnect */ #define TA_AIDL_BDIS (5000) /* a_suspend min 200 ms, section 5.2.1 * TA_AIDL_BDIS: section 5.5, Table 5-1 */ /* B-Idle to A-Disconnect */ #define TA_BIDL_ADIS (500) /* TA_BIDL_ADIS: section 5.2.1 * 500ms is used for B switch to host * for safe */ /* * B-device timing constants */ /* Data-Line Pulse Time*/ #define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms * section:5.1.3 */ /* SRP Fail Time */ #define TB_SRP_FAIL (6000) /* b_srp_init,fail time 5~6s * section:5.1.6 */ /* A-SE0 to B-Reset */ #define TB_ASE0_BRST (155) /* minimum 155 ms, section:5.3.1 */ /* SE0 Time Before SRP */ #define TB_SE0_SRP (1000) /* b_idle,minimum 1s, section:5.1.2 */ /* SSEND time before SRP */ #define TB_SSEND_SRP (1500) /* minimum 1.5 sec, section:5.1.2 */ #define TB_AIDL_BDIS (20) /* 4ms ~ 150ms, section 5.2.1 */ #if IS_ENABLED(CONFIG_USB_OTG_FSM) int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci); int ci_otg_fsm_work(struct ci_hdrc *ci); irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci); void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci); void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci); #else static inline int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci) { return 0; } static inline int ci_otg_fsm_work(struct ci_hdrc *ci) { return -ENXIO; } static inline irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci) { return IRQ_NONE; } static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci) { } static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci) { } #endif #endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */ t.git/commit/?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>root/net/iucv/af_iucv.c
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/iucv/af_iucv.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/iucv/af_iucv.c')