164 lines
4.3 KiB
C
164 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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/efi.h>
|
|
#include <asm/numa.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/delay.h>
|
|
#include <asm/meminit.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/sal.h>
|
|
#include <asm/mca.h>
|
|
|
|
typedef void (*relocate_new_kernel_t)(
|
|
unsigned long indirection_page,
|
|
unsigned long start_address,
|
|
struct ia64_boot_param *boot_param,
|
|
unsigned long pal_addr) __noreturn;
|
|
|
|
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;
|
|
int ii;
|
|
u64 fp, gp;
|
|
ia64_fptr_t *init_handler = (ia64_fptr_t *)ia64_os_init_on_kdump;
|
|
|
|
BUG_ON(!image);
|
|
code_addr = (unsigned long)page_address(image->control_code_page);
|
|
if (image->type == KEXEC_TYPE_CRASH) {
|
|
crash_save_this_cpu();
|
|
current->thread.ksp = (__u64)info->sw - 16;
|
|
|
|
/* Register noop init handler */
|
|
fp = ia64_tpa(init_handler->fp);
|
|
gp = ia64_tpa(ia64_getreg(_IA64_REG_GP));
|
|
ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, fp, gp, 0, fp, gp, 0);
|
|
} else {
|
|
/* Unregister init handlers of current kernel */
|
|
ia64_sal_set_vectors(SAL_VECTOR_OS_INIT, 0, 0, 0, 0, 0, 0);
|
|
}
|
|
|
|
/* Unregister mca handler - No more recovery on current kernel */
|
|
ia64_sal_set_vectors(SAL_VECTOR_OS_MCA, 0, 0, 0, 0, 0, 0);
|
|
|
|
/* 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();
|
|
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)
|
|
{
|
|
#if defined(CONFIG_SPARSEMEM)
|
|
VMCOREINFO_SYMBOL(pgdat_list);
|
|
VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);
|
|
#endif
|
|
#ifdef CONFIG_NUMA
|
|
VMCOREINFO_SYMBOL(node_memblk);
|
|
VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS);
|
|
VMCOREINFO_STRUCT_SIZE(node_memblk_s);
|
|
VMCOREINFO_OFFSET(node_memblk_s, start_paddr);
|
|
VMCOREINFO_OFFSET(node_memblk_s, size);
|
|
#endif
|
|
#if CONFIG_PGTABLE_LEVELS == 3
|
|
VMCOREINFO_CONFIG(PGTABLE_3);
|
|
#elif CONFIG_PGTABLE_LEVELS == 4
|
|
VMCOREINFO_CONFIG(PGTABLE_4);
|
|
#endif
|
|
}
|
|
|