projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| fbcd54b1 JL |
1 | #ifndef _ASM_POWERPC_SECTIONS_H |
| 2 | #define _ASM_POWERPC_SECTIONS_H | |
| 88ced031 | 3 | #ifdef __KERNEL__ |
| 1da177e4 | 4 | |
| 2d291e90 JB |
5 | #include <linux/elf.h> |
| 6 | #include <linux/uaccess.h> | |
| 1da177e4 LT |
7 | #include <asm-generic/sections.h> |
| 8 | ||
| fbcd54b1 | 9 | #ifdef __powerpc64__ |
| 1da177e4 | 10 | |
| 429d2e83 | 11 | extern char __start_interrupts[]; |
| d715e433 | 12 | extern char __end_interrupts[]; |
| 1da177e4 | 13 | |
| 5ac47f7a AB |
14 | extern char __prom_init_toc_start[]; |
| 15 | extern char __prom_init_toc_end[]; | |
| 16 | ||
| 1da177e4 LT |
17 | static inline int in_kernel_text(unsigned long addr) |
| 18 | { | |
| 19 | if (addr >= (unsigned long)_stext && addr < (unsigned long)__init_end) | |
| 20 | return 1; | |
| 21 | ||
| 22 | return 0; | |
| 23 | } | |
| 24 | ||
| a5cab83c ME |
25 | static inline unsigned long kernel_toc_addr(void) |
| 26 | { | |
| 27 | /* Defined by the linker, see vmlinux.lds.S */ | |
| 28 | extern unsigned long __toc_start; | |
| 29 | ||
| 30 | /* | |
| 31 | * The TOC register (r2) points 32kB into the TOC, so that 64kB of | |
| 32 | * the TOC can be addressed using a single machine instruction. | |
| 33 | */ | |
| 34 | return (unsigned long)(&__toc_start) + 0x8000UL; | |
| 35 | } | |
| 36 | ||
| 429d2e83 MS |
37 | static inline int overlaps_interrupt_vector_text(unsigned long start, |
| 38 | unsigned long end) | |
| 39 | { | |
| 40 | unsigned long real_start, real_end; | |
| 41 | real_start = __start_interrupts - _stext; | |
| 42 | real_end = __end_interrupts - _stext; | |
| 43 | ||
| 44 | return start < (unsigned long)__va(real_end) && | |
| 45 | (unsigned long)__va(real_start) < end; | |
| 46 | } | |
| 47 | ||
| 549e8152 PM |
48 | static inline int overlaps_kernel_text(unsigned long start, unsigned long end) |
| 49 | { | |
| 50 | return start < (unsigned long)__init_end && | |
| 51 | (unsigned long)_stext < end; | |
| 52 | } | |
| 53 | ||
| b18db0b8 AG |
54 | static inline int overlaps_kvm_tmp(unsigned long start, unsigned long end) |
| 55 | { | |
| 56 | #ifdef CONFIG_KVM_GUEST | |
| 57 | extern char kvm_tmp[]; | |
| 58 | return start < (unsigned long)kvm_tmp && | |
| 59 | (unsigned long)&kvm_tmp[1024 * 1024] < end; | |
| 60 | #else | |
| 61 | return 0; | |
| 62 | #endif | |
| 63 | } | |
| 64 | ||
| 07de8377 | 65 | #if !defined(_CALL_ELF) || _CALL_ELF != 2 |
| deac93df | 66 | #undef dereference_function_descriptor |
| 2d291e90 JB |
67 | static inline void *dereference_function_descriptor(void *ptr) |
| 68 | { | |
| 69 | struct ppc64_opd_entry *desc = ptr; | |
| 70 | void *p; | |
| 71 | ||
| 72 | if (!probe_kernel_address(&desc->funcaddr, p)) | |
| 73 | ptr = p; | |
| 74 | return ptr; | |
| 75 | } | |
| 07de8377 | 76 | #endif |
| deac93df | 77 | |
| 1da177e4 | 78 | #endif |
| fbcd54b1 | 79 | |
| 88ced031 | 80 | #endif /* __KERNEL__ */ |
| fbcd54b1 | 81 | #endif /* _ASM_POWERPC_SECTIONS_H */ |