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