/*
|
*
|
* (C) COPYRIGHT 2015 ARM Limited. All rights reserved.
|
*
|
* This program is free software and is provided to you under the terms of the
|
* GNU General Public License version 2 as published by the Free Software
|
* Foundation, and any use by you of this program is subject to the terms
|
* of such GNU licence.
|
*
|
* A copy of the licence is included with the program, and can also be obtained
|
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
* Boston, MA 02110-1301, USA.
|
*
|
*/
|
|
|
|
#ifdef CONFIG_ARM64
|
|
#include <mali_kbase.h>
|
#include <mali_kbase_smc.h>
|
|
#include <linux/compiler.h>
|
|
/* __asmeq is not available on Kernel versions >= 4.20 */
|
#ifndef __asmeq
|
/*
|
* This is used to ensure the compiler did actually allocate the register we
|
* asked it for some inline assembly sequences. Apparently we can't trust the
|
* compiler from one version to another so a bit of paranoia won't hurt. This
|
* string is meant to be concatenated with the inline asm string and will
|
* cause compilation to stop on mismatch. (for details, see gcc PR 15089)
|
*/
|
#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
|
#endif
|
|
static noinline u64 invoke_smc_fid(u64 function_id,
|
u64 arg0, u64 arg1, u64 arg2)
|
{
|
register u64 x0 asm("x0") = function_id;
|
register u64 x1 asm("x1") = arg0;
|
register u64 x2 asm("x2") = arg1;
|
register u64 x3 asm("x3") = arg2;
|
|
asm volatile(
|
__asmeq("%0", "x0")
|
__asmeq("%1", "x1")
|
__asmeq("%2", "x2")
|
__asmeq("%3", "x3")
|
"smc #0\n"
|
: "+r" (x0)
|
: "r" (x1), "r" (x2), "r" (x3));
|
|
return x0;
|
}
|
|
u64 kbase_invoke_smc_fid(u32 fid, u64 arg0, u64 arg1, u64 arg2)
|
{
|
/* Is fast call (bit 31 set) */
|
KBASE_DEBUG_ASSERT(fid & ~SMC_FAST_CALL);
|
/* bits 16-23 must be zero for fast calls */
|
KBASE_DEBUG_ASSERT((fid & (0xFF << 16)) == 0);
|
|
return invoke_smc_fid(fid, arg0, arg1, arg2);
|
}
|
|
u64 kbase_invoke_smc(u32 oen, u16 function_number, bool smc64,
|
u64 arg0, u64 arg1, u64 arg2)
|
{
|
u32 fid = 0;
|
|
/* Only the six bits allowed should be used. */
|
KBASE_DEBUG_ASSERT((oen & ~SMC_OEN_MASK) == 0);
|
|
fid |= SMC_FAST_CALL; /* Bit 31: Fast call */
|
if (smc64)
|
fid |= SMC_64; /* Bit 30: 1=SMC64, 0=SMC32 */
|
fid |= oen; /* Bit 29:24: OEN */
|
/* Bit 23:16: Must be zero for fast calls */
|
fid |= (function_number); /* Bit 15:0: function number */
|
|
return kbase_invoke_smc_fid(fid, arg0, arg1, arg2);
|
}
|
|
#endif /* CONFIG_ARM64 */
|
