]> git.karo-electronics.de Git - karo-tx-linux.git/blob - arch/arm/include/asm/kexec.h
Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
[karo-tx-linux.git] / arch / arm / include / asm / kexec.h
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  */
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 */