145 lines
3.8 KiB
C
145 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_KEXEC_H
|
|
#define _ASM_POWERPC_KEXEC_H
|
|
#ifdef __KERNEL__
|
|
|
|
#if defined(CONFIG_FSL_BOOKE) || defined(CONFIG_44x)
|
|
|
|
/*
|
|
* On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory
|
|
* and therefore we can only deal with memory within this range
|
|
*/
|
|
#define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
|
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1)
|
|
|
|
#else
|
|
|
|
/*
|
|
* 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
|
|
#endif
|
|
|
|
#define KEXEC_CONTROL_PAGE_SIZE 4096
|
|
|
|
/* The native architecture */
|
|
#ifdef __powerpc64__
|
|
#define KEXEC_ARCH KEXEC_ARCH_PPC64
|
|
#else
|
|
#define KEXEC_ARCH KEXEC_ARCH_PPC
|
|
#endif
|
|
|
|
#define KEXEC_STATE_NONE 0
|
|
#define KEXEC_STATE_IRQS_OFF 1
|
|
#define KEXEC_STATE_REAL_MODE 2
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm/reg.h>
|
|
|
|
typedef void (*crash_shutdown_t)(void);
|
|
|
|
#ifdef CONFIG_KEXEC_CORE
|
|
|
|
/*
|
|
* 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
|
|
ppc_save_regs(newregs);
|
|
}
|
|
|
|
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 *));
|
|
|
|
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 crash_kexec_secondary(struct pt_regs *regs);
|
|
extern int overlaps_crashkernel(unsigned long start, unsigned long size);
|
|
extern void reserve_crashkernel(void);
|
|
extern void machine_kexec_mask_interrupts(void);
|
|
|
|
static inline bool kdump_in_progress(void)
|
|
{
|
|
return crashing_cpu >= 0;
|
|
}
|
|
|
|
#ifdef CONFIG_KEXEC_FILE
|
|
extern struct kexec_file_ops kexec_elf64_ops;
|
|
|
|
#ifdef CONFIG_IMA_KEXEC
|
|
#define ARCH_HAS_KIMAGE_ARCH
|
|
|
|
struct kimage_arch {
|
|
phys_addr_t ima_buffer_addr;
|
|
size_t ima_buffer_size;
|
|
};
|
|
#endif
|
|
|
|
int setup_purgatory(struct kimage *image, const void *slave_code,
|
|
const void *fdt, unsigned long kernel_load_addr,
|
|
unsigned long fdt_load_addr);
|
|
int setup_new_fdt(const struct kimage *image, void *fdt,
|
|
unsigned long initrd_load_addr, unsigned long initrd_len,
|
|
const char *cmdline);
|
|
int delete_fdt_mem_rsv(void *fdt, unsigned long start, unsigned long size);
|
|
#endif /* CONFIG_KEXEC_FILE */
|
|
|
|
#else /* !CONFIG_KEXEC_CORE */
|
|
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;
|
|
}
|
|
|
|
static inline bool kdump_in_progress(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
#endif /* CONFIG_KEXEC_CORE */
|
|
#endif /* ! __ASSEMBLY__ */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_KEXEC_H */
|