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/*
* Copyright (c) 2006-2010 Trusted Logic S.A.
* All Rights Reserved.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __SCXLNX_COMM_H__
#define __SCXLNX_COMM_H__
#include "scxlnx_defs.h"
#include "scx_protocol.h"
/*----------------------------------------------------------------------------
* Misc
*----------------------------------------------------------------------------*/
void SCXLNXCommSetCurrentTime(struct SCXLNX_COMM *pComm);
/*
* Atomic accesses to 32-bit variables in the L1 Shared buffer
*/
static inline u32 SCXLNXCommReadReg32(const u32 *pCommBuffer)
{
u32 result;
__asm__ __volatile__("@ SCXLNXCommReadReg32\n"
"ldrex %0, [%1]\n"
: "=&r" (result)
: "r" (pCommBuffer)
);
return result;
}
static inline void SCXLNXCommWriteReg32(void *pCommBuffer, u32 nValue)
{
u32 tmp;
__asm__ __volatile__("@ SCXLNXCommWriteReg32\n"
"1: ldrex %0, [%2]\n"
" strex %0, %1, [%2]\n"
" teq %0, #0\n"
" bne 1b"
: "=&r" (tmp)
: "r" (nValue), "r" (pCommBuffer)
: "cc"
);
}
/*
* Atomic accesses to 64-bit variables in the L1 Shared buffer
*/
static inline u64 SCXLNXCommReadReg64(void *pCommBuffer)
{
u64 result;
__asm__ __volatile__("@ SCXLNXCommReadReg64\n"
"ldrexd %0, [%1]\n"
: "=&r" (result)
: "r" (pCommBuffer)
);
return result;
}
static inline void SCXLNXCommWriteReg64(void *pCommBuffer, u64 nValue)
{
u64 tmp;
__asm__ __volatile__("@ SCXLNXCommWriteReg64\n"
"1: ldrexd %0, [%2]\n"
" strexd %0, %1, [%2]\n"
" teq %0, #0\n"
" bne 1b"
: "=&r" (tmp)
: "r" (nValue), "r" (pCommBuffer)
: "cc"
);
}
/*----------------------------------------------------------------------------
* SMC operations
*----------------------------------------------------------------------------*/
/* RPC return values */
#define RPC_NO 0x00 /* No RPC to execute */
#define RPC_YIELD 0x01 /* Yield RPC */
#define RPC_NON_YIELD 0x02 /* non-Yield RPC */
int SCXLNXCommExecuteRPCCommand(struct SCXLNX_COMM *pComm);
/*----------------------------------------------------------------------------
* Shared memory related operations
*----------------------------------------------------------------------------*/
#define L1_DESCRIPTOR_FAULT (0x00000000)
#define L2_DESCRIPTOR_FAULT (0x00000000)
#define L2_DESCRIPTOR_ADDR_MASK (0xFFFFF000)
#define DESCRIPTOR_V13_12_MASK (0x3 << PAGE_SHIFT)
#define DESCRIPTOR_V13_12_GET(a) ((a & DESCRIPTOR_V13_12_MASK) >> PAGE_SHIFT)
struct SCXLNX_COARSE_PAGE_TABLE *SCXLNXAllocateCoarsePageTable(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext,
u32 nType);
void SCXLNXFreeCoarsePageTable(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext,
struct SCXLNX_COARSE_PAGE_TABLE *pCoarsePageTable,
int nForce);
void SCXLNXInitializeCoarsePageTableAllocator(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext);
void SCXLNXReleaseCoarsePageTableAllocator(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext);
struct page *SCXLNXCommL2PageDescriptorToPage(u32 nL2PageDescriptor);
u32 SCXLNXCommGetL2DescriptorCommon(u32 nVirtAddr, struct mm_struct *mm);
void SCXLNXCommReleaseSharedMemory(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext,
struct SCXLNX_SHMEM_DESC *pShmemDesc,
u32 nFullCleanup);
int SCXLNXCommFillDescriptorTable(
struct SCXLNX_COARSE_PAGE_TABLE_ALLOCATION_CONTEXT *pAllocationContext,
struct SCXLNX_SHMEM_DESC *pShmemDesc,
u32 nBufferVAddr,
struct vm_area_struct **ppVmas,
u32 pDescriptors[SCX_MAX_COARSE_PAGES],
u32 *pBufferSize,
u32 *pBufferStartOffset,
bool bInUserSpace,
u32 nFlags,
u32 *pnDescriptorCount);
/*----------------------------------------------------------------------------
* Standard communication operations
*----------------------------------------------------------------------------*/
#define STATUS_PENDING 0x00000001
int tf_schedule_secure_world(struct SCXLNX_COMM *pComm, bool prepare_exit);
int SCXLNXCommSendReceive(
struct SCXLNX_COMM *pComm,
union SCX_COMMAND_MESSAGE *pMessage,
union SCX_ANSWER_MESSAGE *pAnswer,
struct SCXLNX_CONNECTION *pConn,
bool bKillable);
/**
* get a pointer to the secure world description.
* This points directly into the L1 shared buffer
* and is valid only once the communication has
* been initialized
**/
u8 *SCXLNXCommGetDescription(struct SCXLNX_COMM *pComm);
/*----------------------------------------------------------------------------
* Power management
*----------------------------------------------------------------------------*/
enum SCXLNX_POWER_OPERATION {
SCXLNX_POWER_OPERATION_HIBERNATE = 1,
SCXLNX_POWER_OPERATION_SHUTDOWN = 2,
SCXLNX_POWER_OPERATION_RESUME = 3,
};
int SCXLNXCommHibernate(struct SCXLNX_COMM *pComm);
int SCXLNXCommResume(struct SCXLNX_COMM *pComm);
int SCXLNXCommShutdown(struct SCXLNX_COMM *pComm);
int SCXLNXCommPowerManagement(struct SCXLNX_COMM *pComm,
enum SCXLNX_POWER_OPERATION nOperation);
/*----------------------------------------------------------------------------
* Communication initialization and termination
*----------------------------------------------------------------------------*/
int SCXLNXCommInit(struct SCXLNX_COMM *pComm);
void SCXLNXCommTerminate(struct SCXLNX_COMM *pComm);
#endif /* __SCXLNX_COMM_H__ */
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