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
crash_setup_regs(struct pt_regs * newregs,struct pt_regs * oldregs)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
reserve_crashkernel(void)67 static inline void reserve_crashkernel(void) { }
68 #endif /* CONFIG_KEXEC */
69
70 #endif /* __ASM_SH_KEXEC_H */
71