1 #ifndef _ARM_KEXEC_H
2 #define _ARM_KEXEC_H
3
4 #ifdef CONFIG_KEXEC
5
6 /* Maximum physical address we can use pages from */
7 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
8 /* Maximum address we can reach in physical address mode */
9 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
10 /* Maximum address we can use for the control code buffer */
11 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
12
13 #define KEXEC_CONTROL_PAGE_SIZE 4096
14
15 #define KEXEC_ARCH KEXEC_ARCH_ARM
16
17 #define KEXEC_ARM_ATAGS_OFFSET 0x1000
18 #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
19
20 #ifndef __ASSEMBLY__
21
22 /**
23 * crash_setup_regs() - save registers for the panic kernel
24 * @newregs: registers are saved here
25 * @oldregs: registers to be saved (may be %NULL)
26 *
27 * Function copies machine registers from @oldregs to @newregs. If @oldregs is
28 * %NULL then current registers are stored there.
29 */
crash_setup_regs(struct pt_regs * newregs,struct pt_regs * oldregs)30 static inline void crash_setup_regs(struct pt_regs *newregs,
31 struct pt_regs *oldregs)
32 {
33 if (oldregs) {
34 memcpy(newregs, oldregs, sizeof(*newregs));
35 } else {
36 __asm__ __volatile__ (
37 "stmia %[regs_base], {r0-r12}\n\t"
38 "mov %[_ARM_sp], sp\n\t"
39 "str lr, %[_ARM_lr]\n\t"
40 "adr %[_ARM_pc], 1f\n\t"
41 "mrs %[_ARM_cpsr], cpsr\n\t"
42 "1:"
43 : [_ARM_pc] "=r" (newregs->ARM_pc),
44 [_ARM_cpsr] "=r" (newregs->ARM_cpsr),
45 [_ARM_sp] "=r" (newregs->ARM_sp),
46 [_ARM_lr] "=o" (newregs->ARM_lr)
47 : [regs_base] "r" (&newregs->ARM_r0)
48 : "memory"
49 );
50 }
51 }
52
53 /* Function pointer to optional machine-specific reinitialization */
54 extern void (*kexec_reinit)(void);
55
56 #endif /* __ASSEMBLY__ */
57
58 #endif /* CONFIG_KEXEC */
59
60 #endif /* _ARM_KEXEC_H */
61