[deliverable/linux.git] / arch / ia64 / kernel / machine_kexec.c

/*
 * arch/ia64/kernel/machine_kexec.c
 *
 * Handle transition of Linux booting another kernel
 * Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P.
 * Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com>
 * Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com>
 *
 * This source code is licensed under the GNU General Public License,
 * Version 2.  See the file COPYING for more details.
 */

#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/cpu.h>
#include <linux/irq.h>
#include <linux/efi.h>
#include <linux/numa.h>
#include <linux/mmzone.h>
#include <asm/mmu_context.h>
#include <asm/setup.h>
#include <asm/delay.h>
#include <asm/meminit.h>
#include <asm/processor.h>

typedef NORET_TYPE void (*relocate_new_kernel_t)(
					unsigned long indirection_page,
					unsigned long start_address,
					struct ia64_boot_param *boot_param,
					unsigned long pal_addr) ATTRIB_NORET;

struct kimage *ia64_kimage;

struct resource efi_memmap_res = {
        .name  = "EFI Memory Map",
        .start = 0,
        .end   = 0,
        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
};

struct resource boot_param_res = {
        .name  = "Boot parameter",
        .start = 0,
        .end   = 0,
        .flags = IORESOURCE_BUSY | IORESOURCE_MEM
};


/*
 * Do what every setup is needed on image and the
 * reboot code buffer to allow us to avoid allocations
 * later.
 */
int machine_kexec_prepare(struct kimage *image)
{
	void *control_code_buffer;
	const unsigned long *func;

	func = (unsigned long *)&relocate_new_kernel;
	/* Pre-load control code buffer to minimize work in kexec path */
	control_code_buffer = page_address(image->control_code_page);
	memcpy((void *)control_code_buffer, (const void *)func[0],
			relocate_new_kernel_size);
	flush_icache_range((unsigned long)control_code_buffer,
			(unsigned long)control_code_buffer + relocate_new_kernel_size);
	ia64_kimage = image;

	return 0;
}

void machine_kexec_cleanup(struct kimage *image)
{
}

/*
 * Do not allocate memory (or fail in any way) in machine_kexec().
 * We are past the point of no return, committed to rebooting now.
 */
static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
{
	struct kimage *image = arg;
	relocate_new_kernel_t rnk;
	void *pal_addr = efi_get_pal_addr();
	unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
	int ii;

	BUG_ON(!image);
	if (image->type == KEXEC_TYPE_CRASH) {
		crash_save_this_cpu();
		current->thread.ksp = (__u64)info->sw - 16;
	}

	/* Interrupts aren't acceptable while we reboot */
	local_irq_disable();

	/* Mask CMC and Performance Monitor interrupts */
	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);

	/* Mask ITV and Local Redirect Registers */
	ia64_set_itv(1 << 16);
	ia64_set_lrr0(1 << 16);
	ia64_set_lrr1(1 << 16);

	/* terminate possible nested in-service interrupts */
	for (ii = 0; ii < 16; ii++)
		ia64_eoi();

	/* unmask TPR and clear any pending interrupts */
	ia64_setreg(_IA64_REG_CR_TPR, 0);
	ia64_srlz_d();
	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
		ia64_eoi();
	platform_kernel_launch_event();
	rnk = (relocate_new_kernel_t)&code_addr;
	(*rnk)(image->head, image->start, ia64_boot_param,
		     GRANULEROUNDDOWN((unsigned long) pal_addr));
	BUG();
}

void machine_kexec(struct kimage *image)
{
	BUG_ON(!image);
	unw_init_running(ia64_machine_kexec, image);
	for(;;);
}

void arch_crash_save_vmcoreinfo(void)
{
#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
	VMCOREINFO_SYMBOL(pgdat_list);
	VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);

	VMCOREINFO_SYMBOL(node_memblk);
	VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS);
	VMCOREINFO_SIZE(node_memblk_s);
	VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
	VMCOREINFO_OFFSET(node_memblk_s, size);
#endif
#ifdef CONFIG_PGTABLE_3
	VMCOREINFO_CONFIG(PGTABLE_3);
#elif  CONFIG_PGTABLE_4
	VMCOREINFO_CONFIG(PGTABLE_4);
#endif
}

unsigned long paddr_vmcoreinfo_note(void)
{
	return ia64_tpa((unsigned long)(char *)&vmcoreinfo_note);
}
Commit	Line	Data
a7956113 ZN	1	/*
	2	* arch/ia64/kernel/machine_kexec.c
	3	*
	4	* Handle transition of Linux booting another kernel
	5	* Copyright (C) 2005 Hewlett-Packard Development Comapny, L.P.
	6	* Copyright (C) 2005 Khalid Aziz <khalid.aziz@hp.com>
	7	* Copyright (C) 2006 Intel Corp, Zou Nan hai <nanhai.zou@intel.com>
	8	*
	9	* This source code is licensed under the GNU General Public License,
	10	* Version 2. See the file COPYING for more details.
	11	*/
	12
	13	#include <linux/mm.h>
	14	#include <linux/kexec.h>
	15	#include <linux/cpu.h>
	16	#include <linux/irq.h>
abac08db	17	#include <linux/efi.h>
fd59d231 KO	18	#include <linux/numa.h>
fd59d231 KO	19	#include <linux/mmzone.h>
a7956113 ZN	20	#include <asm/mmu_context.h>
	21	#include <asm/setup.h>
	22	#include <asm/delay.h>
	23	#include <asm/meminit.h>
00cab92f	24	#include <asm/processor.h>
a7956113	25
53da5763 H	26	typedef NORET_TYPE void (*relocate_new_kernel_t)(
	27	unsigned long indirection_page,
	28	unsigned long start_address,
	29	struct ia64_boot_param *boot_param,
	30	unsigned long pal_addr) ATTRIB_NORET;
a7956113 ZN	31
	32	struct kimage *ia64_kimage;
	33
	34	struct resource efi_memmap_res = {
	35	.name = "EFI Memory Map",
	36	.start = 0,
	37	.end = 0,
	38	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM
	39	};
	40
	41	struct resource boot_param_res = {
	42	.name = "Boot parameter",
	43	.start = 0,
	44	.end = 0,
	45	.flags = IORESOURCE_BUSY \| IORESOURCE_MEM
	46	};
	47
	48
	49	/*
	50	* Do what every setup is needed on image and the
	51	* reboot code buffer to allow us to avoid allocations
	52	* later.
	53	*/
	54	int machine_kexec_prepare(struct kimage *image)
	55	{
	56	void *control_code_buffer;
	57	const unsigned long *func;
	58
	59	func = (unsigned long *)&relocate_new_kernel;
	60	/* Pre-load control code buffer to minimize work in kexec path */
	61	control_code_buffer = page_address(image->control_code_page);
	62	memcpy((void )control_code_buffer, (const void )func[0],
	63	relocate_new_kernel_size);
	64	flush_icache_range((unsigned long)control_code_buffer,
	65	(unsigned long)control_code_buffer + relocate_new_kernel_size);
	66	ia64_kimage = image;
	67
	68	return 0;
	69	}
	70
	71	void machine_kexec_cleanup(struct kimage *image)
	72	{
	73	}
	74
a7956113 ZN	75	/*
	76	* Do not allocate memory (or fail in any way) in machine_kexec().
	77	* We are past the point of no return, committed to rebooting now.
	78	*/
a7956113 ZN	79	static void ia64_machine_kexec(struct unw_frame_info info, void arg)
	80	{
	81	struct kimage *image = arg;
	82	relocate_new_kernel_t rnk;
	83	void *pal_addr = efi_get_pal_addr();
	84	unsigned long code_addr = (unsigned long)page_address(image->control_code_page);
a7956113 ZN	85	int ii;
a7956113 ZN	86
c2c77fe8	87	BUG_ON(!image);
a7956113 ZN	88	if (image->type == KEXEC_TYPE_CRASH) {
	89	crash_save_this_cpu();
	90	current->thread.ksp = (__u64)info->sw - 16;
	91	}
	92
	93	/* Interrupts aren't acceptable while we reboot */
	94	local_irq_disable();
	95
	96	/* Mask CMC and Performance Monitor interrupts */
	97	ia64_setreg(_IA64_REG_CR_PMV, 1 << 16);
	98	ia64_setreg(_IA64_REG_CR_CMCV, 1 << 16);
	99
	100	/* Mask ITV and Local Redirect Registers */
	101	ia64_set_itv(1 << 16);
	102	ia64_set_lrr0(1 << 16);
	103	ia64_set_lrr1(1 << 16);
	104
	105	/* terminate possible nested in-service interrupts */
	106	for (ii = 0; ii < 16; ii++)
	107	ia64_eoi();
	108
	109	/* unmask TPR and clear any pending interrupts */
	110	ia64_setreg(_IA64_REG_CR_TPR, 0);
	111	ia64_srlz_d();
a62c9fe4	112	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
a7956113	113	ia64_eoi();
a7956113 ZN	114	platform_kernel_launch_event();
	115	rnk = (relocate_new_kernel_t)&code_addr;
	116	(*rnk)(image->head, image->start, ia64_boot_param,
	117	GRANULEROUNDDOWN((unsigned long) pal_addr));
	118	BUG();
	119	}
	120
	121	void machine_kexec(struct kimage *image)
	122	{
c2c77fe8	123	BUG_ON(!image);
a7956113 ZN	124	unw_init_running(ia64_machine_kexec, image);
	125	for(;;);
	126	}
fd59d231 KO	127
	128	void arch_crash_save_vmcoreinfo(void)
	129	{
	130	#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
bcbba6c1 KO	131	VMCOREINFO_SYMBOL(pgdat_list);
	132	VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);
	133
	134	VMCOREINFO_SYMBOL(node_memblk);
	135	VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS);
	136	VMCOREINFO_SIZE(node_memblk_s);
	137	VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
	138	VMCOREINFO_OFFSET(node_memblk_s, size);
fd59d231 KO	139	#endif
fd59d231 KO	140	#ifdef CONFIG_PGTABLE_3
bcbba6c1	141	VMCOREINFO_CONFIG(PGTABLE_3);
fd59d231	142	#elif CONFIG_PGTABLE_4
bcbba6c1	143	VMCOREINFO_CONFIG(PGTABLE_4);
fd59d231 KO	144	#endif
	145	}
	146
	147	unsigned long paddr_vmcoreinfo_note(void)
	148	{
00cab92f	149	return ia64_tpa((unsigned long)(char *)&vmcoreinfo_note);
fd59d231 KO	150	}
fd59d231 KO	151