576 lines
16 KiB
C
576 lines
16 KiB
C
|
/*
|
||
|
|
* ePAPR hcall interface
|
||
|
|
*
|
||
|
|
* Copyright 2008-2011 Freescale Semiconductor, Inc.
|
||
|
|
*
|
||
|
|
* Author: Timur Tabi <timur@freescale.com>
|
||
|
|
*
|
||
|
|
* This file is provided under a dual BSD/GPL license. When using or
|
||
|
|
* redistributing this file, you may do so under either license.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions are met:
|
||
|
|
* * Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* * Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* * Neither the name of Freescale Semiconductor nor the
|
||
|
|
* names of its contributors may be used to endorse or promote products
|
||
|
|
* derived from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* ALTERNATIVELY, this software may be distributed under the terms of the
|
||
|
|
* GNU General Public License ("GPL") as published by the Free Software
|
||
|
|
* Foundation, either version 2 of that License or (at your option) any
|
||
|
|
* later version.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
|
||
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||
|
|
* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
|
||
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
||
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
||
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* A "hypercall" is an "sc 1" instruction. This header file file provides C
|
||
|
|
* wrapper functions for the ePAPR hypervisor interface. It is inteded
|
||
|
|
* for use by Linux device drivers and other operating systems.
|
||
|
|
*
|
||
|
|
* The hypercalls are implemented as inline assembly, rather than assembly
|
||
|
|
* language functions in a .S file, for optimization. It allows
|
||
|
|
* the caller to issue the hypercall instruction directly, improving both
|
||
|
|
* performance and memory footprint.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _EPAPR_HCALLS_H
|
||
|
|
#define _EPAPR_HCALLS_H
|
||
|
|
|
||
|
|
#include <uapi/asm/epapr_hcalls.h>
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <asm/byteorder.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Hypercall register clobber list
|
||
|
|
*
|
||
|
|
* These macros are used to define the list of clobbered registers during a
|
||
|
|
* hypercall. Technically, registers r0 and r3-r12 are always clobbered,
|
||
|
|
* but the gcc inline assembly syntax does not allow us to specify registers
|
||
|
|
* on the clobber list that are also on the input/output list. Therefore,
|
||
|
|
* the lists of clobbered registers depends on the number of register
|
||
|
|
* parmeters ("+r" and "=r") passed to the hypercall.
|
||
|
|
*
|
||
|
|
* Each assembly block should use one of the HCALL_CLOBBERSx macros. As a
|
||
|
|
* general rule, 'x' is the number of parameters passed to the assembly
|
||
|
|
* block *except* for r11.
|
||
|
|
*
|
||
|
|
* If you're not sure, just use the smallest value of 'x' that does not
|
||
|
|
* generate a compilation error. Because these are static inline functions,
|
||
|
|
* the compiler will only check the clobber list for a function if you
|
||
|
|
* compile code that calls that function.
|
||
|
|
*
|
||
|
|
* r3 and r11 are not included in any clobbers list because they are always
|
||
|
|
* listed as output registers.
|
||
|
|
*
|
||
|
|
* XER, CTR, and LR are currently listed as clobbers because it's uncertain
|
||
|
|
* whether they will be clobbered.
|
||
|
|
*
|
||
|
|
* Note that r11 can be used as an output parameter.
|
||
|
|
*
|
||
|
|
* The "memory" clobber is only necessary for hcalls where the Hypervisor
|
||
|
|
* will read or write guest memory. However, we add it to all hcalls because
|
||
|
|
* the impact is minimal, and we want to ensure that it's present for the
|
||
|
|
* hcalls that need it.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* List of common clobbered registers. Do not use this macro. */
|
||
|
|
#define EV_HCALL_CLOBBERS "r0", "r12", "xer", "ctr", "lr", "cc", "memory"
|
||
|
|
|
||
|
|
#define EV_HCALL_CLOBBERS8 EV_HCALL_CLOBBERS
|
||
|
|
#define EV_HCALL_CLOBBERS7 EV_HCALL_CLOBBERS8, "r10"
|
||
|
|
#define EV_HCALL_CLOBBERS6 EV_HCALL_CLOBBERS7, "r9"
|
||
|
|
#define EV_HCALL_CLOBBERS5 EV_HCALL_CLOBBERS6, "r8"
|
||
|
|
#define EV_HCALL_CLOBBERS4 EV_HCALL_CLOBBERS5, "r7"
|
||
|
|
#define EV_HCALL_CLOBBERS3 EV_HCALL_CLOBBERS4, "r6"
|
||
|
|
#define EV_HCALL_CLOBBERS2 EV_HCALL_CLOBBERS3, "r5"
|
||
|
|
#define EV_HCALL_CLOBBERS1 EV_HCALL_CLOBBERS2, "r4"
|
||
|
|
|
||
|
|
extern bool epapr_paravirt_enabled;
|
||
|
|
extern u32 epapr_hypercall_start[];
|
||
|
|
|
||
|
|
#ifdef CONFIG_EPAPR_PARAVIRT
|
||
|
|
int __init epapr_paravirt_early_init(void);
|
||
|
|
#else
|
||
|
|
static inline int epapr_paravirt_early_init(void) { return 0; }
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We use "uintptr_t" to define a register because it's guaranteed to be a
|
||
|
|
* 32-bit integer on a 32-bit platform, and a 64-bit integer on a 64-bit
|
||
|
|
* platform.
|
||
|
|
*
|
||
|
|
* All registers are either input/output or output only. Registers that are
|
||
|
|
* initialized before making the hypercall are input/output. All
|
||
|
|
* input/output registers are represented with "+r". Output-only registers
|
||
|
|
* are represented with "=r". Do not specify any unused registers. The
|
||
|
|
* clobber list will tell the compiler that the hypercall modifies those
|
||
|
|
* registers, which is good enough.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_set_config - configure the specified interrupt
|
||
|
|
* @interrupt: the interrupt number
|
||
|
|
* @config: configuration for this interrupt
|
||
|
|
* @priority: interrupt priority
|
||
|
|
* @destination: destination CPU number
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_set_config(unsigned int interrupt,
|
||
|
|
uint32_t config, unsigned int priority, uint32_t destination)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
register uintptr_t r5 __asm__("r5");
|
||
|
|
register uintptr_t r6 __asm__("r6");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_SET_CONFIG);
|
||
|
|
r3 = interrupt;
|
||
|
|
r4 = config;
|
||
|
|
r5 = priority;
|
||
|
|
r6 = destination;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "+r" (r4), "+r" (r5), "+r" (r6)
|
||
|
|
: : EV_HCALL_CLOBBERS4
|
||
|
|
);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_get_config - return the config of the specified interrupt
|
||
|
|
* @interrupt: the interrupt number
|
||
|
|
* @config: returned configuration for this interrupt
|
||
|
|
* @priority: returned interrupt priority
|
||
|
|
* @destination: returned destination CPU number
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_get_config(unsigned int interrupt,
|
||
|
|
uint32_t *config, unsigned int *priority, uint32_t *destination)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
register uintptr_t r5 __asm__("r5");
|
||
|
|
register uintptr_t r6 __asm__("r6");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_GET_CONFIG);
|
||
|
|
r3 = interrupt;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5), "=r" (r6)
|
||
|
|
: : EV_HCALL_CLOBBERS4
|
||
|
|
);
|
||
|
|
|
||
|
|
*config = r4;
|
||
|
|
*priority = r5;
|
||
|
|
*destination = r6;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_set_mask - sets the mask for the specified interrupt source
|
||
|
|
* @interrupt: the interrupt number
|
||
|
|
* @mask: 0=enable interrupts, 1=disable interrupts
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_set_mask(unsigned int interrupt,
|
||
|
|
unsigned int mask)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_SET_MASK);
|
||
|
|
r3 = interrupt;
|
||
|
|
r4 = mask;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "+r" (r4)
|
||
|
|
: : EV_HCALL_CLOBBERS2
|
||
|
|
);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_get_mask - returns the mask for the specified interrupt source
|
||
|
|
* @interrupt: the interrupt number
|
||
|
|
* @mask: returned mask for this interrupt (0=enabled, 1=disabled)
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_get_mask(unsigned int interrupt,
|
||
|
|
unsigned int *mask)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_GET_MASK);
|
||
|
|
r3 = interrupt;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "=r" (r4)
|
||
|
|
: : EV_HCALL_CLOBBERS2
|
||
|
|
);
|
||
|
|
|
||
|
|
*mask = r4;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_eoi - signal the end of interrupt processing
|
||
|
|
* @interrupt: the interrupt number
|
||
|
|
*
|
||
|
|
* This function signals the end of processing for the the specified
|
||
|
|
* interrupt, which must be the interrupt currently in service. By
|
||
|
|
* definition, this is also the highest-priority interrupt.
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_eoi(unsigned int interrupt)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_EOI);
|
||
|
|
r3 = interrupt;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3)
|
||
|
|
: : EV_HCALL_CLOBBERS1
|
||
|
|
);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_byte_channel_send - send characters to a byte stream
|
||
|
|
* @handle: byte stream handle
|
||
|
|
* @count: (input) num of chars to send, (output) num chars sent
|
||
|
|
* @buffer: pointer to a 16-byte buffer
|
||
|
|
*
|
||
|
|
* @buffer must be at least 16 bytes long, because all 16 bytes will be
|
||
|
|
* read from memory into registers, even if count < 16.
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_byte_channel_send(unsigned int handle,
|
||
|
|
unsigned int *count, const char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
register uintptr_t r5 __asm__("r5");
|
||
|
|
register uintptr_t r6 __asm__("r6");
|
||
|
|
register uintptr_t r7 __asm__("r7");
|
||
|
|
register uintptr_t r8 __asm__("r8");
|
||
|
|
const uint32_t *p = (const uint32_t *) buffer;
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_SEND);
|
||
|
|
r3 = handle;
|
||
|
|
r4 = *count;
|
||
|
|
r5 = be32_to_cpu(p[0]);
|
||
|
|
r6 = be32_to_cpu(p[1]);
|
||
|
|
r7 = be32_to_cpu(p[2]);
|
||
|
|
r8 = be32_to_cpu(p[3]);
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3),
|
||
|
|
"+r" (r4), "+r" (r5), "+r" (r6), "+r" (r7), "+r" (r8)
|
||
|
|
: : EV_HCALL_CLOBBERS6
|
||
|
|
);
|
||
|
|
|
||
|
|
*count = r4;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_byte_channel_receive - fetch characters from a byte channel
|
||
|
|
* @handle: byte channel handle
|
||
|
|
* @count: (input) max num of chars to receive, (output) num chars received
|
||
|
|
* @buffer: pointer to a 16-byte buffer
|
||
|
|
*
|
||
|
|
* The size of @buffer must be at least 16 bytes, even if you request fewer
|
||
|
|
* than 16 characters, because we always write 16 bytes to @buffer. This is
|
||
|
|
* for performance reasons.
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_byte_channel_receive(unsigned int handle,
|
||
|
|
unsigned int *count, char buffer[EV_BYTE_CHANNEL_MAX_BYTES])
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
register uintptr_t r5 __asm__("r5");
|
||
|
|
register uintptr_t r6 __asm__("r6");
|
||
|
|
register uintptr_t r7 __asm__("r7");
|
||
|
|
register uintptr_t r8 __asm__("r8");
|
||
|
|
uint32_t *p = (uint32_t *) buffer;
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_RECEIVE);
|
||
|
|
r3 = handle;
|
||
|
|
r4 = *count;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "+r" (r4),
|
||
|
|
"=r" (r5), "=r" (r6), "=r" (r7), "=r" (r8)
|
||
|
|
: : EV_HCALL_CLOBBERS6
|
||
|
|
);
|
||
|
|
|
||
|
|
*count = r4;
|
||
|
|
p[0] = cpu_to_be32(r5);
|
||
|
|
p[1] = cpu_to_be32(r6);
|
||
|
|
p[2] = cpu_to_be32(r7);
|
||
|
|
p[3] = cpu_to_be32(r8);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_byte_channel_poll - returns the status of the byte channel buffers
|
||
|
|
* @handle: byte channel handle
|
||
|
|
* @rx_count: returned count of bytes in receive queue
|
||
|
|
* @tx_count: returned count of free space in transmit queue
|
||
|
|
*
|
||
|
|
* This function reports the amount of data in the receive queue (i.e. the
|
||
|
|
* number of bytes you can read), and the amount of free space in the transmit
|
||
|
|
* queue (i.e. the number of bytes you can write).
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_byte_channel_poll(unsigned int handle,
|
||
|
|
unsigned int *rx_count, unsigned int *tx_count)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
register uintptr_t r5 __asm__("r5");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_BYTE_CHANNEL_POLL);
|
||
|
|
r3 = handle;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "=r" (r4), "=r" (r5)
|
||
|
|
: : EV_HCALL_CLOBBERS3
|
||
|
|
);
|
||
|
|
|
||
|
|
*rx_count = r4;
|
||
|
|
*tx_count = r5;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_int_iack - acknowledge an interrupt
|
||
|
|
* @handle: handle to the target interrupt controller
|
||
|
|
* @vector: returned interrupt vector
|
||
|
|
*
|
||
|
|
* If handle is zero, the function returns the next interrupt source
|
||
|
|
* number to be handled irrespective of the hierarchy or cascading
|
||
|
|
* of interrupt controllers. If non-zero, specifies a handle to the
|
||
|
|
* interrupt controller that is the target of the acknowledge.
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_int_iack(unsigned int handle,
|
||
|
|
unsigned int *vector)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
register uintptr_t r4 __asm__("r4");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_INT_IACK);
|
||
|
|
r3 = handle;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3), "=r" (r4)
|
||
|
|
: : EV_HCALL_CLOBBERS2
|
||
|
|
);
|
||
|
|
|
||
|
|
*vector = r4;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_doorbell_send - send a doorbell to another partition
|
||
|
|
* @handle: doorbell send handle
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_doorbell_send(unsigned int handle)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_DOORBELL_SEND);
|
||
|
|
r3 = handle;
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "+r" (r3)
|
||
|
|
: : EV_HCALL_CLOBBERS1
|
||
|
|
);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ev_idle -- wait for next interrupt on this core
|
||
|
|
*
|
||
|
|
* Returns 0 for success, or an error code.
|
||
|
|
*/
|
||
|
|
static inline unsigned int ev_idle(void)
|
||
|
|
{
|
||
|
|
register uintptr_t r11 __asm__("r11");
|
||
|
|
register uintptr_t r3 __asm__("r3");
|
||
|
|
|
||
|
|
r11 = EV_HCALL_TOKEN(EV_IDLE);
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "+r" (r11), "=r" (r3)
|
||
|
|
: : EV_HCALL_CLOBBERS1
|
||
|
|
);
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_EPAPR_PARAVIRT
|
||
|
|
static inline unsigned long epapr_hypercall(unsigned long *in,
|
||
|
|
unsigned long *out,
|
||
|
|
unsigned long nr)
|
||
|
|
{
|
||
|
|
register unsigned long r0 asm("r0");
|
||
|
|
register unsigned long r3 asm("r3") = in[0];
|
||
|
|
register unsigned long r4 asm("r4") = in[1];
|
||
|
|
register unsigned long r5 asm("r5") = in[2];
|
||
|
|
register unsigned long r6 asm("r6") = in[3];
|
||
|
|
register unsigned long r7 asm("r7") = in[4];
|
||
|
|
register unsigned long r8 asm("r8") = in[5];
|
||
|
|
register unsigned long r9 asm("r9") = in[6];
|
||
|
|
register unsigned long r10 asm("r10") = in[7];
|
||
|
|
register unsigned long r11 asm("r11") = nr;
|
||
|
|
register unsigned long r12 asm("r12");
|
||
|
|
|
||
|
|
asm volatile("bl epapr_hypercall_start"
|
||
|
|
: "=r"(r0), "=r"(r3), "=r"(r4), "=r"(r5), "=r"(r6),
|
||
|
|
"=r"(r7), "=r"(r8), "=r"(r9), "=r"(r10), "=r"(r11),
|
||
|
|
"=r"(r12)
|
||
|
|
: "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "r"(r8),
|
||
|
|
"r"(r9), "r"(r10), "r"(r11)
|
||
|
|
: "memory", "cc", "xer", "ctr", "lr");
|
||
|
|
|
||
|
|
out[0] = r4;
|
||
|
|
out[1] = r5;
|
||
|
|
out[2] = r6;
|
||
|
|
out[3] = r7;
|
||
|
|
out[4] = r8;
|
||
|
|
out[5] = r9;
|
||
|
|
out[6] = r10;
|
||
|
|
out[7] = r11;
|
||
|
|
|
||
|
|
return r3;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static unsigned long epapr_hypercall(unsigned long *in,
|
||
|
|
unsigned long *out,
|
||
|
|
unsigned long nr)
|
||
|
|
{
|
||
|
|
return EV_UNIMPLEMENTED;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static inline long epapr_hypercall0_1(unsigned int nr, unsigned long *r2)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
unsigned long r;
|
||
|
|
|
||
|
|
r = epapr_hypercall(in, out, nr);
|
||
|
|
*r2 = out[0];
|
||
|
|
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long epapr_hypercall0(unsigned int nr)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
|
||
|
|
return epapr_hypercall(in, out, nr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long epapr_hypercall1(unsigned int nr, unsigned long p1)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
|
||
|
|
in[0] = p1;
|
||
|
|
return epapr_hypercall(in, out, nr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long epapr_hypercall2(unsigned int nr, unsigned long p1,
|
||
|
|
unsigned long p2)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
|
||
|
|
in[0] = p1;
|
||
|
|
in[1] = p2;
|
||
|
|
return epapr_hypercall(in, out, nr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long epapr_hypercall3(unsigned int nr, unsigned long p1,
|
||
|
|
unsigned long p2, unsigned long p3)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
|
||
|
|
in[0] = p1;
|
||
|
|
in[1] = p2;
|
||
|
|
in[2] = p3;
|
||
|
|
return epapr_hypercall(in, out, nr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long epapr_hypercall4(unsigned int nr, unsigned long p1,
|
||
|
|
unsigned long p2, unsigned long p3,
|
||
|
|
unsigned long p4)
|
||
|
|
{
|
||
|
|
unsigned long in[8] = {0};
|
||
|
|
unsigned long out[8];
|
||
|
|
|
||
|
|
in[0] = p1;
|
||
|
|
in[1] = p2;
|
||
|
|
in[2] = p3;
|
||
|
|
in[3] = p4;
|
||
|
|
return epapr_hypercall(in, out, nr);
|
||
|
|
}
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
#endif /* _EPAPR_HCALLS_H */
|