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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_ARM_INSN_H
#define __ASM_ARM_INSN_H
#include <linux/types.h>
/*
* Avoid a literal load by emitting a sequence of ADD/LDR instructions with the
* appropriate relocations. The combined sequence has a range of -/+ 256 MiB,
* which should be sufficient for the core kernel as well as modules loaded
* into the module region. (Not supported by LLD before release 14)
*/
#define LOAD_SYM_ARMV6(reg, sym) \
" .globl " #sym " \n\t" \
" .reloc 10f, R_ARM_ALU_PC_G0_NC, " #sym " \n\t" \
" .reloc 11f, R_ARM_ALU_PC_G1_NC, " #sym " \n\t" \
" .reloc 12f, R_ARM_LDR_PC_G2, " #sym " \n\t" \
"10: sub " #reg ", pc, #8 \n\t" \
"11: sub " #reg ", " #reg ", #4 \n\t" \
"12: ldr " #reg ", [" #reg ", #0] \n\t"
static inline unsigned long
arm_gen_nop(void)
{
#ifdef CONFIG_THUMB2_KERNEL
return 0xf3af8000; /* nop.w */
#else
return 0xe1a00000; /* mov r0, r0 */
#endif
}
unsigned long
__arm_gen_branch(unsigned long pc, unsigned long addr, bool link, bool warn);
static inline unsigned long
arm_gen_branch(unsigned long pc, unsigned long addr)
{
return __arm_gen_branch(pc, addr, false, true);
}
static inline unsigned long
arm_gen_branch_link(unsigned long pc, unsigned long addr, bool warn)
{
return __arm_gen_branch(pc, addr, true, warn);
}
#endif