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[ARM] add machine-specific hook to machine_kexec

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Provide the option to call a machine-specific function
before kexec'ing a new kernel.

Signed-off-by: Eric Cooper <ecc@cmu.edu>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
This commit is contained in:
Eric Cooper
2011-02-02 17:16:09 -05:00
committed by Nicolas Pitre
parent e25bac968d
commit 868d172b8a
2 changed files with 10 additions and 0 deletions
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3
arch/arm/include/asm/kexec.h
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@@ -50,6 +50,9 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
} }
} }
/* Function pointer to optional machine-specific reinitialization */
extern void (*kexec_reinit)(void);
#endif /* __ASSEMBLY__ */ #endif /* __ASSEMBLY__ */
#endif /* CONFIG_KEXEC */ #endif /* CONFIG_KEXEC */

7
arch/arm/kernel/machine_kexec.c
View File

@@ -75,6 +75,11 @@ void machine_crash_shutdown(struct pt_regs *regs)
printk(KERN_INFO "Loading crashdump kernel...\n"); printk(KERN_INFO "Loading crashdump kernel...\n");
} }
/*
* Function pointer to optional machine-specific reinitialization
*/
void (*kexec_reinit)(void);
void machine_kexec(struct kimage *image) void machine_kexec(struct kimage *image)
{ {
unsigned long page_list; unsigned long page_list;
@@ -104,6 +109,8 @@ void machine_kexec(struct kimage *image)
(unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE); (unsigned long) reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE);
printk(KERN_INFO "Bye!\n"); printk(KERN_INFO "Bye!\n");
if (kexec_reinit)
kexec_reinit();
local_irq_disable(); local_irq_disable();
local_fiq_disable(); local_fiq_disable();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/ setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/