[linux-block.git] / include / asm-powerpc / kexec.h

#ifndef _ASM_POWERPC_KEXEC_H
#define _ASM_POWERPC_KEXEC_H
#ifdef __KERNEL__

/*
 * Maximum page that is mapped directly into kernel memory.
 * XXX: Since we copy virt we can use any page we allocate
 */
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)

/*
 * Maximum address we can reach in physical address mode.
 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
 */
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)

/* Maximum address we can use for the control code buffer */
#ifdef __powerpc64__
#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
#else
/* TASK_SIZE, probably left over from use_mm ?? */
#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
#endif

#define KEXEC_CONTROL_CODE_SIZE 4096

/* The native architecture */
#ifdef __powerpc64__
#define KEXEC_ARCH KEXEC_ARCH_PPC64
#else
#define KEXEC_ARCH KEXEC_ARCH_PPC
#endif

#ifndef __ASSEMBLY__
#include <linux/cpumask.h>

#ifdef CONFIG_KEXEC

#ifdef __powerpc64__
/*
 * This function is responsible for capturing register states if coming
 * via panic or invoking dump using sysrq-trigger.
 */
static inline void crash_setup_regs(struct pt_regs *newregs,
					struct pt_regs *oldregs)
{
	if (oldregs)
		memcpy(newregs, oldregs, sizeof(*newregs));
	else {
		/* FIXME Merge this with xmon_save_regs ?? */
		unsigned long tmp1, tmp2;
		__asm__ __volatile__ (
			"std    0,0(%2)\n"
			"std    1,8(%2)\n"
			"std    2,16(%2)\n"
			"std    3,24(%2)\n"
			"std    4,32(%2)\n"
			"std    5,40(%2)\n"
			"std    6,48(%2)\n"
			"std    7,56(%2)\n"
			"std    8,64(%2)\n"
			"std    9,72(%2)\n"
			"std    10,80(%2)\n"
			"std    11,88(%2)\n"
			"std    12,96(%2)\n"
			"std    13,104(%2)\n"
			"std    14,112(%2)\n"
			"std    15,120(%2)\n"
			"std    16,128(%2)\n"
			"std    17,136(%2)\n"
			"std    18,144(%2)\n"
			"std    19,152(%2)\n"
			"std    20,160(%2)\n"
			"std    21,168(%2)\n"
			"std    22,176(%2)\n"
			"std    23,184(%2)\n"
			"std    24,192(%2)\n"
			"std    25,200(%2)\n"
			"std    26,208(%2)\n"
			"std    27,216(%2)\n"
			"std    28,224(%2)\n"
			"std    29,232(%2)\n"
			"std    30,240(%2)\n"
			"std    31,248(%2)\n"
			"mfmsr  %0\n"
			"std    %0, 264(%2)\n"
			"mfctr  %0\n"
			"std    %0, 280(%2)\n"
			"mflr   %0\n"
			"std    %0, 288(%2)\n"
			"bl     1f\n"
		"1:     mflr   %1\n"
			"std    %1, 256(%2)\n"
			"mtlr   %0\n"
			"mfxer  %0\n"
			"std    %0, 296(%2)\n"
			: "=&r" (tmp1), "=&r" (tmp2)
			: "b" (newregs)
			: "memory");
	}
}
#else
/*
 * Provide a dummy definition to avoid build failures. Will remain
 * empty till crash dump support is enabled.
 */
static inline void crash_setup_regs(struct pt_regs *newregs,
					struct pt_regs *oldregs) { }
#endif /* !__powerpc64 __ */

extern void kexec_smp_wait(void);	/* get and clear naca physid, wait for
					  master to copy new code to 0 */
extern int crashing_cpu;
extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
extern cpumask_t cpus_in_sr;
static inline int kexec_sr_activated(int cpu)
{
	return cpu_isset(cpu,cpus_in_sr);
}

struct kimage;
struct pt_regs;
extern void default_machine_kexec(struct kimage *image);
extern int default_machine_kexec_prepare(struct kimage *image);
extern void default_machine_crash_shutdown(struct pt_regs *regs);

extern void machine_kexec_simple(struct kimage *image);
extern void crash_kexec_secondary(struct pt_regs *regs);
extern int overlaps_crashkernel(unsigned long start, unsigned long size);
extern void reserve_crashkernel(void);

#else /* !CONFIG_KEXEC */
static inline int kexec_sr_activated(int cpu) { return 0; }
static inline void crash_kexec_secondary(struct pt_regs *regs) { }

static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
{
	return 0;
}

static inline void reserve_crashkernel(void) { ; }

#endif /* CONFIG_KEXEC */
#endif /* ! __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_KEXEC_H */
Commit	Line	Data
e1df870d ME	1	#ifndef _ASM_POWERPC_KEXEC_H
e1df870d ME	2	#define _ASM_POWERPC_KEXEC_H
88ced031	3	#ifdef __KERNEL__
e1df870d ME	4
	5	/*
	6	* Maximum page that is mapped directly into kernel memory.
	7	* XXX: Since we copy virt we can use any page we allocate
	8	*/
	9	#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
	10
	11	/*
	12	* Maximum address we can reach in physical address mode.
	13	* XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
	14	*/
	15	#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
	16
	17	/* Maximum address we can use for the control code buffer */
	18	#ifdef __powerpc64__
	19	#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
	20	#else
	21	/* TASK_SIZE, probably left over from use_mm ?? */
	22	#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
	23	#endif
	24
	25	#define KEXEC_CONTROL_CODE_SIZE 4096
	26
	27	/* The native architecture */
	28	#ifdef __powerpc64__
	29	#define KEXEC_ARCH KEXEC_ARCH_PPC64
	30	#else
	31	#define KEXEC_ARCH KEXEC_ARCH_PPC
	32	#endif
	33
2babf5c2	34	#ifndef __ASSEMBLY__
b6f35b49	35	#include <linux/cpumask.h>
2babf5c2	36
cc532915 ME	37	#ifdef CONFIG_KEXEC
cc532915 ME	38
8385a6a3 HM	39	#ifdef __powerpc64__
	40	/*
	41	* This function is responsible for capturing register states if coming
	42	* via panic or invoking dump using sysrq-trigger.
	43	*/
	44	static inline void crash_setup_regs(struct pt_regs *newregs,
	45	struct pt_regs *oldregs)
	46	{
	47	if (oldregs)
	48	memcpy(newregs, oldregs, sizeof(*newregs));
	49	else {
	50	/* FIXME Merge this with xmon_save_regs ?? */
	51	unsigned long tmp1, tmp2;
	52	__asm__ __volatile__ (
	53	"std 0,0(%2)\n"
	54	"std 1,8(%2)\n"
	55	"std 2,16(%2)\n"
	56	"std 3,24(%2)\n"
	57	"std 4,32(%2)\n"
	58	"std 5,40(%2)\n"
	59	"std 6,48(%2)\n"
	60	"std 7,56(%2)\n"
	61	"std 8,64(%2)\n"
	62	"std 9,72(%2)\n"
	63	"std 10,80(%2)\n"
	64	"std 11,88(%2)\n"
	65	"std 12,96(%2)\n"
	66	"std 13,104(%2)\n"
	67	"std 14,112(%2)\n"
	68	"std 15,120(%2)\n"
	69	"std 16,128(%2)\n"
	70	"std 17,136(%2)\n"
	71	"std 18,144(%2)\n"
	72	"std 19,152(%2)\n"
	73	"std 20,160(%2)\n"
	74	"std 21,168(%2)\n"
	75	"std 22,176(%2)\n"
	76	"std 23,184(%2)\n"
	77	"std 24,192(%2)\n"
	78	"std 25,200(%2)\n"
	79	"std 26,208(%2)\n"
	80	"std 27,216(%2)\n"
	81	"std 28,224(%2)\n"
	82	"std 29,232(%2)\n"
	83	"std 30,240(%2)\n"
	84	"std 31,248(%2)\n"
	85	"mfmsr %0\n"
	86	"std %0, 264(%2)\n"
	87	"mfctr %0\n"
	88	"std %0, 280(%2)\n"
	89	"mflr %0\n"
	90	"std %0, 288(%2)\n"
	91	"bl 1f\n"
	92	"1: mflr %1\n"
	93	"std %1, 256(%2)\n"
	94	"mtlr %0\n"
	95	"mfxer %0\n"
	96	"std %0, 296(%2)\n"
	97	: "=&r" (tmp1), "=&r" (tmp2)
2ec5e3a8 MM	98	: "b" (newregs)
2ec5e3a8 MM	99	: "memory");
8385a6a3 HM	100	}
	101	}
	102	#else
	103	/*
	104	* Provide a dummy definition to avoid build failures. Will remain
	105	* empty till crash dump support is enabled.
	106	*/
	107	static inline void crash_setup_regs(struct pt_regs *newregs,
	108	struct pt_regs *oldregs) { }
	109	#endif /* !__powerpc64 __ */
	110
e1df870d ME	111	extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
e1df870d ME	112	master to copy new code to 0 */
cc532915 ME	113	extern int crashing_cpu;
cc532915 ME	114	extern void crash_send_ipi(void (crash_ipi_callback)(struct pt_regs ));
c0ce7d08 DW	115	extern cpumask_t cpus_in_sr;
	116	static inline int kexec_sr_activated(int cpu)
	117	{
	118	return cpu_isset(cpu,cpus_in_sr);
	119	}
e1df870d	120
3d1229d6	121	struct kimage;
cc532915	122	struct pt_regs;
3d1229d6 ME	123	extern void default_machine_kexec(struct kimage *image);
3d1229d6 ME	124	extern int default_machine_kexec_prepare(struct kimage *image);
cc532915 ME	125	extern void default_machine_crash_shutdown(struct pt_regs *regs);
cc532915 ME	126
39931e41	127	extern void machine_kexec_simple(struct kimage *image);
c0ce7d08	128	extern void crash_kexec_secondary(struct pt_regs *regs);
2babf5c2	129	extern int overlaps_crashkernel(unsigned long start, unsigned long size);
35dd5432	130	extern void reserve_crashkernel(void);
2babf5c2 ME	131
2babf5c2 ME	132	#else /* !CONFIG_KEXEC */
c0ce7d08 DW	133	static inline int kexec_sr_activated(int cpu) { return 0; }
c0ce7d08 DW	134	static inline void crash_kexec_secondary(struct pt_regs *regs) { }
2babf5c2 ME	135
	136	static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
	137	{
	138	return 0;
	139	}
39931e41	140
35dd5432 ME	141	static inline void reserve_crashkernel(void) { ; }
35dd5432 ME	142
8385a6a3	143	#endif /* CONFIG_KEXEC */
2babf5c2	144	#endif /* ! __ASSEMBLY__ */
88ced031	145	#endif /* __KERNEL__ */
e1df870d	146	#endif /* _ASM_POWERPC_KEXEC_H */