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655 lines
17 KiB
655 lines
17 KiB
/* |
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* Freescale hypervisor call interface |
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* |
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* Copyright 2008-2010 Freescale Semiconductor, Inc. |
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* |
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* Author: Timur Tabi <[email protected]> |
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* |
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* This file is provided under a dual BSD/GPL license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the name of Freescale Semiconductor nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* |
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* ALTERNATIVELY, this software may be distributed under the terms of the |
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* GNU General Public License ("GPL") as published by the Free Software |
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* Foundation, either version 2 of that License or (at your option) any |
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* later version. |
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* |
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* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef _FSL_HCALLS_H |
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#define _FSL_HCALLS_H |
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|
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <asm/byteorder.h> |
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#include <asm/epapr_hcalls.h> |
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#define FH_API_VERSION 1 |
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#define FH_ERR_GET_INFO 1 |
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#define FH_PARTITION_GET_DTPROP 2 |
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#define FH_PARTITION_SET_DTPROP 3 |
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#define FH_PARTITION_RESTART 4 |
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#define FH_PARTITION_GET_STATUS 5 |
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#define FH_PARTITION_START 6 |
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#define FH_PARTITION_STOP 7 |
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#define FH_PARTITION_MEMCPY 8 |
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#define FH_DMA_ENABLE 9 |
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#define FH_DMA_DISABLE 10 |
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#define FH_SEND_NMI 11 |
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#define FH_VMPIC_GET_MSIR 12 |
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#define FH_SYSTEM_RESET 13 |
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#define FH_GET_CORE_STATE 14 |
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#define FH_ENTER_NAP 15 |
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#define FH_EXIT_NAP 16 |
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#define FH_CLAIM_DEVICE 17 |
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#define FH_PARTITION_STOP_DMA 18 |
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|
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/* vendor ID: Freescale Semiconductor */ |
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#define FH_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_FSL_VENDOR_ID, num) |
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|
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/* |
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* We use "uintptr_t" to define a register because it's guaranteed to be a |
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* 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit |
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* platform. |
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* |
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* All registers are either input/output or output only. Registers that are |
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* initialized before making the hypercall are input/output. All |
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* input/output registers are represented with "+r". Output-only registers |
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* are represented with "=r". Do not specify any unused registers. The |
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* clobber list will tell the compiler that the hypercall modifies those |
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* registers, which is good enough. |
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*/ |
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/** |
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* fh_send_nmi - send NMI to virtual cpu(s). |
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* @vcpu_mask: send NMI to virtual cpu(s) specified by this mask. |
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* |
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* Returns 0 for success, or EINVAL for invalid vcpu_mask. |
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*/ |
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static inline unsigned int fh_send_nmi(unsigned int vcpu_mask) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_SEND_NMI); |
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r3 = vcpu_mask; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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/* Arbitrary limits to avoid excessive memory allocation in hypervisor */ |
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#define FH_DTPROP_MAX_PATHLEN 4096 |
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#define FH_DTPROP_MAX_PROPLEN 32768 |
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/** |
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* fh_partition_get_dtprop - get a property from a guest device tree. |
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* @handle: handle of partition whose device tree is to be accessed |
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* @dtpath_addr: physical address of device tree path to access |
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* @propname_addr: physical address of name of property |
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* @propvalue_addr: physical address of property value buffer |
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* @propvalue_len: length of buffer on entry, length of property on return |
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* |
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* Returns zero on success, non-zero on error. |
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*/ |
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static inline unsigned int fh_partition_get_dtprop(int handle, |
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uint64_t dtpath_addr, |
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uint64_t propname_addr, |
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uint64_t propvalue_addr, |
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uint32_t *propvalue_len) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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register uintptr_t r5 __asm__("r5"); |
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register uintptr_t r6 __asm__("r6"); |
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register uintptr_t r7 __asm__("r7"); |
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register uintptr_t r8 __asm__("r8"); |
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register uintptr_t r9 __asm__("r9"); |
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register uintptr_t r10 __asm__("r10"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_DTPROP); |
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r3 = handle; |
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#ifdef CONFIG_PHYS_64BIT |
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r4 = dtpath_addr >> 32; |
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r6 = propname_addr >> 32; |
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r8 = propvalue_addr >> 32; |
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#else |
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r4 = 0; |
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r6 = 0; |
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r8 = 0; |
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#endif |
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r5 = (uint32_t)dtpath_addr; |
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r7 = (uint32_t)propname_addr; |
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r9 = (uint32_t)propvalue_addr; |
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r10 = *propvalue_len; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), |
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), |
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"+r" (r8), "+r" (r9), "+r" (r10) |
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: : EV_HCALL_CLOBBERS8 |
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); |
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*propvalue_len = r4; |
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return r3; |
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} |
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/** |
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* Set a property in a guest device tree. |
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* @handle: handle of partition whose device tree is to be accessed |
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* @dtpath_addr: physical address of device tree path to access |
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* @propname_addr: physical address of name of property |
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* @propvalue_addr: physical address of property value |
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* @propvalue_len: length of property |
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* |
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* Returns zero on success, non-zero on error. |
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*/ |
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static inline unsigned int fh_partition_set_dtprop(int handle, |
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uint64_t dtpath_addr, |
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uint64_t propname_addr, |
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uint64_t propvalue_addr, |
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uint32_t propvalue_len) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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register uintptr_t r6 __asm__("r6"); |
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register uintptr_t r8 __asm__("r8"); |
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register uintptr_t r5 __asm__("r5"); |
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register uintptr_t r7 __asm__("r7"); |
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register uintptr_t r9 __asm__("r9"); |
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register uintptr_t r10 __asm__("r10"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_SET_DTPROP); |
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r3 = handle; |
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#ifdef CONFIG_PHYS_64BIT |
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r4 = dtpath_addr >> 32; |
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r6 = propname_addr >> 32; |
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r8 = propvalue_addr >> 32; |
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#else |
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r4 = 0; |
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r6 = 0; |
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r8 = 0; |
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#endif |
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r5 = (uint32_t)dtpath_addr; |
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r7 = (uint32_t)propname_addr; |
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r9 = (uint32_t)propvalue_addr; |
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r10 = propvalue_len; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), |
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), |
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"+r" (r8), "+r" (r9), "+r" (r10) |
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: : EV_HCALL_CLOBBERS8 |
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); |
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return r3; |
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} |
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/** |
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* fh_partition_restart - reboot the current partition |
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* @partition: partition ID |
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* |
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* Returns an error code if reboot failed. Does not return if it succeeds. |
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*/ |
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static inline unsigned int fh_partition_restart(unsigned int partition) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_RESTART); |
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r3 = partition; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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#define FH_PARTITION_STOPPED 0 |
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#define FH_PARTITION_RUNNING 1 |
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#define FH_PARTITION_STARTING 2 |
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#define FH_PARTITION_STOPPING 3 |
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#define FH_PARTITION_PAUSING 4 |
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#define FH_PARTITION_PAUSED 5 |
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#define FH_PARTITION_RESUMING 6 |
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/** |
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* fh_partition_get_status - gets the status of a partition |
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* @partition: partition ID |
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* @status: returned status code |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_partition_get_status(unsigned int partition, |
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unsigned int *status) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_GET_STATUS); |
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r3 = partition; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3), "=r" (r4) |
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: : EV_HCALL_CLOBBERS2 |
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); |
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*status = r4; |
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return r3; |
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} |
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/** |
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* fh_partition_start - boots and starts execution of the specified partition |
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* @partition: partition ID |
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* @entry_point: guest physical address to start execution |
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* |
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* The hypervisor creates a 1-to-1 virtual/physical IMA mapping, so at boot |
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* time, guest physical address are the same as guest virtual addresses. |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_partition_start(unsigned int partition, |
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uint32_t entry_point, int load) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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register uintptr_t r5 __asm__("r5"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_START); |
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r3 = partition; |
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r4 = entry_point; |
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r5 = load; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5) |
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: : EV_HCALL_CLOBBERS3 |
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); |
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return r3; |
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} |
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/** |
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* fh_partition_stop - stops another partition |
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* @partition: partition ID |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_partition_stop(unsigned int partition) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP); |
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r3 = partition; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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/** |
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* struct fh_sg_list: definition of the fh_partition_memcpy S/G list |
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* @source: guest physical address to copy from |
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* @target: guest physical address to copy to |
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* @size: number of bytes to copy |
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* @reserved: reserved, must be zero |
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* |
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* The scatter/gather list for fh_partition_memcpy() is an array of these |
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* structures. The array must be guest physically contiguous. |
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* |
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* This structure must be aligned on 32-byte boundary, so that no single |
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* strucuture can span two pages. |
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*/ |
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struct fh_sg_list { |
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uint64_t source; /**< guest physical address to copy from */ |
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uint64_t target; /**< guest physical address to copy to */ |
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uint64_t size; /**< number of bytes to copy */ |
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uint64_t reserved; /**< reserved, must be zero */ |
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} __attribute__ ((aligned(32))); |
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/** |
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* fh_partition_memcpy - copies data from one guest to another |
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* @source: the ID of the partition to copy from |
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* @target: the ID of the partition to copy to |
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* @sg_list: guest physical address of an array of &fh_sg_list structures |
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* @count: the number of entries in @sg_list |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_partition_memcpy(unsigned int source, |
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unsigned int target, phys_addr_t sg_list, unsigned int count) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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register uintptr_t r5 __asm__("r5"); |
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register uintptr_t r6 __asm__("r6"); |
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register uintptr_t r7 __asm__("r7"); |
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r11 = FH_HCALL_TOKEN(FH_PARTITION_MEMCPY); |
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r3 = source; |
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r4 = target; |
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r5 = (uint32_t) sg_list; |
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#ifdef CONFIG_PHYS_64BIT |
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r6 = sg_list >> 32; |
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#else |
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r6 = 0; |
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#endif |
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r7 = count; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), |
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"+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7) |
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: : EV_HCALL_CLOBBERS5 |
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); |
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return r3; |
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} |
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/** |
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* fh_dma_enable - enable DMA for the specified device |
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* @liodn: the LIODN of the I/O device for which to enable DMA |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_dma_enable(unsigned int liodn) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_DMA_ENABLE); |
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r3 = liodn; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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/** |
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* fh_dma_disable - disable DMA for the specified device |
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* @liodn: the LIODN of the I/O device for which to disable DMA |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_dma_disable(unsigned int liodn) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_DMA_DISABLE); |
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r3 = liodn; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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/** |
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* fh_vmpic_get_msir - returns the MPIC-MSI register value |
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* @interrupt: the interrupt number |
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* @msir_val: returned MPIC-MSI register value |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_vmpic_get_msir(unsigned int interrupt, |
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unsigned int *msir_val) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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r11 = FH_HCALL_TOKEN(FH_VMPIC_GET_MSIR); |
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r3 = interrupt; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3), "=r" (r4) |
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: : EV_HCALL_CLOBBERS2 |
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); |
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*msir_val = r4; |
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return r3; |
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} |
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|
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/** |
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* fh_system_reset - reset the system |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_system_reset(void) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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r11 = FH_HCALL_TOKEN(FH_SYSTEM_RESET); |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "=r" (r3) |
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: : EV_HCALL_CLOBBERS1 |
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); |
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return r3; |
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} |
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|
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/** |
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* fh_err_get_info - get platform error information |
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* @queue id: |
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* 0 for guest error event queue |
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* 1 for global error event queue |
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* |
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* @pointer to store the platform error data: |
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* platform error data is returned in registers r4 - r11 |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_err_get_info(int queue, uint32_t *bufsize, |
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uint32_t addr_hi, uint32_t addr_lo, int peek) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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register uintptr_t r5 __asm__("r5"); |
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register uintptr_t r6 __asm__("r6"); |
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register uintptr_t r7 __asm__("r7"); |
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r11 = FH_HCALL_TOKEN(FH_ERR_GET_INFO); |
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r3 = queue; |
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r4 = *bufsize; |
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r5 = addr_hi; |
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r6 = addr_lo; |
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r7 = peek; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6), |
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"+r" (r7) |
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: : EV_HCALL_CLOBBERS5 |
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); |
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*bufsize = r4; |
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return r3; |
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} |
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|
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#define FH_VCPU_RUN 0 |
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#define FH_VCPU_IDLE 1 |
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#define FH_VCPU_NAP 2 |
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|
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/** |
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* fh_get_core_state - get the state of a vcpu |
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* |
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* @handle: handle of partition containing the vcpu |
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* @vcpu: vcpu number within the partition |
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* @state:the current state of the vcpu, see FH_VCPU_* |
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* |
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* Returns 0 for success, or an error code. |
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*/ |
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static inline unsigned int fh_get_core_state(unsigned int handle, |
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unsigned int vcpu, unsigned int *state) |
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{ |
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register uintptr_t r11 __asm__("r11"); |
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register uintptr_t r3 __asm__("r3"); |
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register uintptr_t r4 __asm__("r4"); |
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r11 = FH_HCALL_TOKEN(FH_GET_CORE_STATE); |
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r3 = handle; |
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r4 = vcpu; |
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asm volatile("bl epapr_hypercall_start" |
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: "+r" (r11), "+r" (r3), "+r" (r4) |
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: : EV_HCALL_CLOBBERS2 |
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); |
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*state = r4; |
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return r3; |
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} |
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|
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/** |
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* fh_enter_nap - enter nap on a vcpu |
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* |
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* Note that though the API supports entering nap on a vcpu other |
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* than the caller, this may not be implmented and may return EINVAL. |
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* |
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* @handle: handle of partition containing the vcpu |
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* @vcpu: vcpu number within the partition |
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* |
|
* Returns 0 for success, or an error code. |
|
*/ |
|
static inline unsigned int fh_enter_nap(unsigned int handle, unsigned int vcpu) |
|
{ |
|
register uintptr_t r11 __asm__("r11"); |
|
register uintptr_t r3 __asm__("r3"); |
|
register uintptr_t r4 __asm__("r4"); |
|
|
|
r11 = FH_HCALL_TOKEN(FH_ENTER_NAP); |
|
r3 = handle; |
|
r4 = vcpu; |
|
|
|
asm volatile("bl epapr_hypercall_start" |
|
: "+r" (r11), "+r" (r3), "+r" (r4) |
|
: : EV_HCALL_CLOBBERS2 |
|
); |
|
|
|
return r3; |
|
} |
|
|
|
/** |
|
* fh_exit_nap - exit nap on a vcpu |
|
* @handle: handle of partition containing the vcpu |
|
* @vcpu: vcpu number within the partition |
|
* |
|
* Returns 0 for success, or an error code. |
|
*/ |
|
static inline unsigned int fh_exit_nap(unsigned int handle, unsigned int vcpu) |
|
{ |
|
register uintptr_t r11 __asm__("r11"); |
|
register uintptr_t r3 __asm__("r3"); |
|
register uintptr_t r4 __asm__("r4"); |
|
|
|
r11 = FH_HCALL_TOKEN(FH_EXIT_NAP); |
|
r3 = handle; |
|
r4 = vcpu; |
|
|
|
asm volatile("bl epapr_hypercall_start" |
|
: "+r" (r11), "+r" (r3), "+r" (r4) |
|
: : EV_HCALL_CLOBBERS2 |
|
); |
|
|
|
return r3; |
|
} |
|
/** |
|
* fh_claim_device - claim a "claimable" shared device |
|
* @handle: fsl,hv-device-handle of node to claim |
|
* |
|
* Returns 0 for success, or an error code. |
|
*/ |
|
static inline unsigned int fh_claim_device(unsigned int handle) |
|
{ |
|
register uintptr_t r11 __asm__("r11"); |
|
register uintptr_t r3 __asm__("r3"); |
|
|
|
r11 = FH_HCALL_TOKEN(FH_CLAIM_DEVICE); |
|
r3 = handle; |
|
|
|
asm volatile("bl epapr_hypercall_start" |
|
: "+r" (r11), "+r" (r3) |
|
: : EV_HCALL_CLOBBERS1 |
|
); |
|
|
|
return r3; |
|
} |
|
|
|
/** |
|
* Run deferred DMA disabling on a partition's private devices |
|
* |
|
* This applies to devices which a partition owns either privately, |
|
* or which are claimable and still actively owned by that partition, |
|
* and which do not have the no-dma-disable property. |
|
* |
|
* @handle: partition (must be stopped) whose DMA is to be disabled |
|
* |
|
* Returns 0 for success, or an error code. |
|
*/ |
|
static inline unsigned int fh_partition_stop_dma(unsigned int handle) |
|
{ |
|
register uintptr_t r11 __asm__("r11"); |
|
register uintptr_t r3 __asm__("r3"); |
|
|
|
r11 = FH_HCALL_TOKEN(FH_PARTITION_STOP_DMA); |
|
r3 = handle; |
|
|
|
asm volatile("bl epapr_hypercall_start" |
|
: "+r" (r11), "+r" (r3) |
|
: : EV_HCALL_CLOBBERS1 |
|
); |
|
|
|
return r3; |
|
} |
|
#endif
|
|
|