forked from Minki/linux
02af87a742
The patch replaces internal registers dump implementation with ppc_save_regs(). From now on PPC64 and PPC32 are using the same code for crash_setup_regs(). NOTE: The old regs dump implementation was capturing SP (r1) directly as is, so you could see crash_kexec() function on top of the back-trace. But ppc_save_regs() goes up one stack frame, so you'll not see it anymore, at the top-level you'll see who actually triggered the crash dump instead. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
#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_PAGE_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>
|
|
#include <asm/reg.h>
|
|
|
|
typedef void (*crash_shutdown_t)(void);
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
/*
|
|
* 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 *));
|
|
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 */
|