1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_SECTIONS_H
3#define _ASM_POWERPC_SECTIONS_H
4#ifdef __KERNEL__
5
6#include <linux/elf.h>
7#include <linux/uaccess.h>
8
9#ifdef CONFIG_HAVE_FUNCTION_DESCRIPTORS
10typedef struct func_desc func_desc_t;
11#endif
12
13#include <asm-generic/sections.h>
14
15extern char __head_end[];
16extern char __srwx_boundary[];
17
18/* Patch sites */
19extern s32 patch__call_flush_branch_caches1;
20extern s32 patch__call_flush_branch_caches2;
21extern s32 patch__call_flush_branch_caches3;
22extern s32 patch__flush_count_cache_return;
23extern s32 patch__flush_link_stack_return;
24extern s32 patch__call_kvm_flush_link_stack;
25extern s32 patch__call_kvm_flush_link_stack_p9;
26extern s32 patch__memset_nocache, patch__memcpy_nocache;
27
28extern long flush_branch_caches;
29extern long kvm_flush_link_stack;
30
31#ifdef __powerpc64__
32
33extern char __start_interrupts[];
34extern char __end_interrupts[];
35
36#ifdef CONFIG_PPC_POWERNV
37extern char start_real_trampolines[];
38extern char end_real_trampolines[];
39extern char start_virt_trampolines[];
40extern char end_virt_trampolines[];
41#endif
42
43/*
44 * This assumes the kernel is never compiled -mcmodel=small or
45 * the total .toc is always less than 64k.
46 */
47static inline unsigned long kernel_toc_addr(void)
48{
49#ifdef CONFIG_PPC_KERNEL_PCREL
50	BUILD_BUG();
51	return -1UL;
52#else
53	unsigned long toc_ptr;
54
55	asm volatile("mr %0, 2" : "=r" (toc_ptr));
56	return toc_ptr;
57#endif
58}
59
60static inline int overlaps_interrupt_vector_text(unsigned long start,
61							unsigned long end)
62{
63	unsigned long real_start, real_end;
64	real_start = __start_interrupts - _stext;
65	real_end = __end_interrupts - _stext;
66
67	return start < (unsigned long)__va(real_end) &&
68		(unsigned long)__va(real_start) < end;
69}
70
71static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
72{
73	return start < (unsigned long)__init_end &&
74		(unsigned long)_stext < end;
75}
76
77#else
78static inline unsigned long kernel_toc_addr(void) { BUILD_BUG(); return -1UL; }
79#endif
80
81#endif /* __KERNEL__ */
82#endif	/* _ASM_POWERPC_SECTIONS_H */
83