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 extern char __srwx_boundary[]; 17 18 /* Patch sites */ 19 extern s32 patch__call_flush_branch_caches1; 20 extern s32 patch__call_flush_branch_caches2; 21 extern s32 patch__call_flush_branch_caches3; 22 extern s32 patch__flush_count_cache_return; 23 extern s32 patch__flush_link_stack_return; 24 extern s32 patch__call_kvm_flush_link_stack; 25 extern s32 patch__call_kvm_flush_link_stack_p9; 26 extern s32 patch__memset_nocache, patch__memcpy_nocache; 27 28 extern long flush_branch_caches; 29 extern long kvm_flush_link_stack; 30 31 #ifdef __powerpc64__ 32 33 extern char __start_interrupts[]; 34 extern char __end_interrupts[]; 35 36 #ifdef CONFIG_PPC_POWERNV 37 extern char start_real_trampolines[]; 38 extern char end_real_trampolines[]; 39 extern char start_virt_trampolines[]; 40 extern 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 */ 47 static 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 60 static 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 71 static 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 #endif 78 79 #endif /* __KERNEL__ */ 80 #endif /* _ASM_POWERPC_SECTIONS_H */ 81