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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_SECTIONS_H
#define _ASM_POWERPC_SECTIONS_H
#ifdef __KERNEL__
#include <linux/elf.h>
#include <linux/uaccess.h>
#ifdef CONFIG_HAVE_FUNCTION_DESCRIPTORS
typedef struct func_desc func_desc_t;
#endif
#include <asm-generic/sections.h>
extern char __head_end[];
extern char __srwx_boundary[];
extern char __exittext_begin[], __exittext_end[];
/* Patch sites */
extern s32 patch__call_flush_branch_caches1;
extern s32 patch__call_flush_branch_caches2;
extern s32 patch__call_flush_branch_caches3;
extern s32 patch__flush_count_cache_return;
extern s32 patch__flush_link_stack_return;
extern s32 patch__call_kvm_flush_link_stack;
extern s32 patch__call_kvm_flush_link_stack_p9;
extern s32 patch__memset_nocache, patch__memcpy_nocache;
extern long flush_branch_caches;
extern long kvm_flush_link_stack;
#ifdef __powerpc64__
extern char __start_interrupts[];
extern char __end_interrupts[];
#ifdef CONFIG_PPC_POWERNV
extern char start_real_trampolines[];
extern char end_real_trampolines[];
extern char start_virt_trampolines[];
extern char end_virt_trampolines[];
#endif
/*
* This assumes the kernel is never compiled -mcmodel=small or
* the total .toc is always less than 64k.
*/
static inline unsigned long kernel_toc_addr(void)
{
#ifdef CONFIG_PPC_KERNEL_PCREL
BUILD_BUG();
return -1UL;
#else
unsigned long toc_ptr;
asm volatile("mr %0, 2" : "=r" (toc_ptr));
return toc_ptr;
#endif
}
static inline int overlaps_interrupt_vector_text(unsigned long start,
unsigned long end)
{
unsigned long real_start, real_end;
real_start = __start_interrupts - _stext;
real_end = __end_interrupts - _stext;
return start < (unsigned long)__va(real_end) &&
(unsigned long)__va(real_start) < end;
}
static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
{
return start < (unsigned long)__init_end &&
(unsigned long)_stext < end;
}
#else
static inline unsigned long kernel_toc_addr(void) { BUILD_BUG(); return -1UL; }
#endif
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SECTIONS_H */