Linux Kernel  3.7.1
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kexec.h
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1 #ifndef __ASM_SH_KEXEC_H
2 #define __ASM_SH_KEXEC_H
3 
4 #include <asm/ptrace.h>
5 #include <asm/string.h>
6 
7 /*
8  * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
9  * I.e. Maximum page that is mapped directly into kernel memory,
10  * and kmap is not required.
11  *
12  * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
13  * calculation for the amount of memory directly mappable into the
14  * kernel memory space.
15  */
16 
17 /* Maximum physical address we can use pages from */
18 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
19 /* Maximum address we can reach in physical address mode */
20 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
21 /* Maximum address we can use for the control code buffer */
22 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
23 
24 #define KEXEC_CONTROL_PAGE_SIZE 4096
25 
26 /* The native architecture */
27 #define KEXEC_ARCH KEXEC_ARCH_SH
28 
29 #ifdef CONFIG_KEXEC
30 /* arch/sh/kernel/machine_kexec.c */
31 void reserve_crashkernel(void);
32 
33 static inline void crash_setup_regs(struct pt_regs *newregs,
34  struct pt_regs *oldregs)
35 {
36  if (oldregs)
37  memcpy(newregs, oldregs, sizeof(*newregs));
38  else {
39  __asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0]));
40  __asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1]));
41  __asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2]));
42  __asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3]));
43  __asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4]));
44  __asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5]));
45  __asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6]));
46  __asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7]));
47  __asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8]));
48  __asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9]));
49  __asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10]));
50  __asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11]));
51  __asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12]));
52  __asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13]));
53  __asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14]));
54  __asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15]));
55 
56  __asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr));
57  __asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl));
58  __asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach));
59 
60  __asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr));
61  __asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr));
62 
63  newregs->pc = (unsigned long)current_text_addr();
64  }
65 }
66 #else
67 static inline void reserve_crashkernel(void) { }
68 #endif /* CONFIG_KEXEC */
69 
70 #endif /* __ASM_SH_KEXEC_H */