Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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 unsigned long toc_ptr;
50
51 asm volatile("mr %0, 2" : "=r" (toc_ptr));
52 return toc_ptr;
53}
54
55static inline int overlaps_interrupt_vector_text(unsigned long start,
56 unsigned long end)
57{
58 unsigned long real_start, real_end;
59 real_start = __start_interrupts - _stext;
60 real_end = __end_interrupts - _stext;
61
62 return start < (unsigned long)__va(real_end) &&
63 (unsigned long)__va(real_start) < end;
64}
65
66static inline int overlaps_kernel_text(unsigned long start, unsigned long end)
67{
68 return start < (unsigned long)__init_end &&
69 (unsigned long)_stext < end;
70}
71
72#endif
73
74#endif /* __KERNEL__ */
75#endif /* _ASM_POWERPC_SECTIONS_H */