[deliverable/linux.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>

typedef void (*crash_shutdown_t)(void);

#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 int crash_shutdown_register(crash_shutdown_t handler);
extern int crash_shutdown_unregister(crash_shutdown_t handler);

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) { ; }

static inline int crash_shutdown_register(crash_shutdown_t handler)
{
	return 0;
}

static inline int crash_shutdown_unregister(crash_shutdown_t handler)
{
	return 0;
}

#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
aee10c61 AB	37	typedef void (*crash_shutdown_t)(void);
aee10c61 AB	38
cc532915 ME	39	#ifdef CONFIG_KEXEC
cc532915 ME	40
8385a6a3 HM	41	#ifdef __powerpc64__
	42	/*
	43	* This function is responsible for capturing register states if coming
	44	* via panic or invoking dump using sysrq-trigger.
	45	*/
	46	static inline void crash_setup_regs(struct pt_regs *newregs,
	47	struct pt_regs *oldregs)
	48	{
	49	if (oldregs)
	50	memcpy(newregs, oldregs, sizeof(*newregs));
	51	else {
	52	/* FIXME Merge this with xmon_save_regs ?? */
	53	unsigned long tmp1, tmp2;
	54	__asm__ __volatile__ (
	55	"std 0,0(%2)\n"
	56	"std 1,8(%2)\n"
	57	"std 2,16(%2)\n"
	58	"std 3,24(%2)\n"
	59	"std 4,32(%2)\n"
	60	"std 5,40(%2)\n"
	61	"std 6,48(%2)\n"
	62	"std 7,56(%2)\n"
	63	"std 8,64(%2)\n"
	64	"std 9,72(%2)\n"
	65	"std 10,80(%2)\n"
	66	"std 11,88(%2)\n"
	67	"std 12,96(%2)\n"
	68	"std 13,104(%2)\n"
	69	"std 14,112(%2)\n"
	70	"std 15,120(%2)\n"
	71	"std 16,128(%2)\n"
	72	"std 17,136(%2)\n"
	73	"std 18,144(%2)\n"
	74	"std 19,152(%2)\n"
	75	"std 20,160(%2)\n"
	76	"std 21,168(%2)\n"
	77	"std 22,176(%2)\n"
	78	"std 23,184(%2)\n"
	79	"std 24,192(%2)\n"
	80	"std 25,200(%2)\n"
	81	"std 26,208(%2)\n"
	82	"std 27,216(%2)\n"
	83	"std 28,224(%2)\n"
	84	"std 29,232(%2)\n"
	85	"std 30,240(%2)\n"
	86	"std 31,248(%2)\n"
	87	"mfmsr %0\n"
	88	"std %0, 264(%2)\n"
	89	"mfctr %0\n"
	90	"std %0, 280(%2)\n"
	91	"mflr %0\n"
	92	"std %0, 288(%2)\n"
	93	"bl 1f\n"
	94	"1: mflr %1\n"
	95	"std %1, 256(%2)\n"
	96	"mtlr %0\n"
	97	"mfxer %0\n"
	98	"std %0, 296(%2)\n"
	99	: "=&r" (tmp1), "=&r" (tmp2)
2ec5e3a8 MM	100	: "b" (newregs)
2ec5e3a8 MM	101	: "memory");
8385a6a3 HM	102	}
	103	}
	104	#else
	105	/*
	106	* Provide a dummy definition to avoid build failures. Will remain
	107	* empty till crash dump support is enabled.
	108	*/
	109	static inline void crash_setup_regs(struct pt_regs *newregs,
	110	struct pt_regs *oldregs) { }
	111	#endif /* !__powerpc64 __ */
	112
e1df870d ME	113	extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
e1df870d ME	114	master to copy new code to 0 */
cc532915 ME	115	extern int crashing_cpu;
cc532915 ME	116	extern void crash_send_ipi(void (crash_ipi_callback)(struct pt_regs ));
c0ce7d08 DW	117	extern cpumask_t cpus_in_sr;
	118	static inline int kexec_sr_activated(int cpu)
	119	{
	120	return cpu_isset(cpu,cpus_in_sr);
	121	}
e1df870d	122
3d1229d6	123	struct kimage;
cc532915	124	struct pt_regs;
3d1229d6 ME	125	extern void default_machine_kexec(struct kimage *image);
3d1229d6 ME	126	extern int default_machine_kexec_prepare(struct kimage *image);
cc532915	127	extern void default_machine_crash_shutdown(struct pt_regs *regs);
496b010e MN	128	extern int crash_shutdown_register(crash_shutdown_t handler);
496b010e MN	129	extern int crash_shutdown_unregister(crash_shutdown_t handler);
cc532915	130
39931e41	131	extern void machine_kexec_simple(struct kimage *image);
c0ce7d08	132	extern void crash_kexec_secondary(struct pt_regs *regs);
2babf5c2	133	extern int overlaps_crashkernel(unsigned long start, unsigned long size);
35dd5432	134	extern void reserve_crashkernel(void);
2babf5c2 ME	135
2babf5c2 ME	136	#else /* !CONFIG_KEXEC */
c0ce7d08 DW	137	static inline int kexec_sr_activated(int cpu) { return 0; }
c0ce7d08 DW	138	static inline void crash_kexec_secondary(struct pt_regs *regs) { }
2babf5c2 ME	139
	140	static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
	141	{
	142	return 0;
	143	}
39931e41	144
35dd5432 ME	145	static inline void reserve_crashkernel(void) { ; }
35dd5432 ME	146
aee10c61 AB	147	static inline int crash_shutdown_register(crash_shutdown_t handler)
	148	{
	149	return 0;
	150	}
	151
	152	static inline int crash_shutdown_unregister(crash_shutdown_t handler)
	153	{
	154	return 0;
	155	}
	156
8385a6a3	157	#endif /* CONFIG_KEXEC */
2babf5c2	158	#endif /* ! __ASSEMBLY__ */
88ced031	159	#endif /* __KERNEL__ */
e1df870d	160	#endif /* _ASM_POWERPC_KEXEC_H */