mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
868d172b8a
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>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#ifndef _ARM_KEXEC_H
|
|
#define _ARM_KEXEC_H
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
/* Maximum physical address we can use pages from */
|
|
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can reach in physical address mode */
|
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
/* Maximum address we can use for the control code buffer */
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
|
|
|
|
#define KEXEC_CONTROL_PAGE_SIZE 4096
|
|
|
|
#define KEXEC_ARCH KEXEC_ARCH_ARM
|
|
|
|
#define KEXEC_ARM_ATAGS_OFFSET 0x1000
|
|
#define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/**
|
|
* crash_setup_regs() - save registers for the panic kernel
|
|
* @newregs: registers are saved here
|
|
* @oldregs: registers to be saved (may be %NULL)
|
|
*
|
|
* Function copies machine registers from @oldregs to @newregs. If @oldregs is
|
|
* %NULL then current registers are stored there.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
if (oldregs) {
|
|
memcpy(newregs, oldregs, sizeof(*newregs));
|
|
} else {
|
|
__asm__ __volatile__ (
|
|
"stmia %[regs_base], {r0-r12}\n\t"
|
|
"mov %[_ARM_sp], sp\n\t"
|
|
"str lr, %[_ARM_lr]\n\t"
|
|
"adr %[_ARM_pc], 1f\n\t"
|
|
"mrs %[_ARM_cpsr], cpsr\n\t"
|
|
"1:"
|
|
: [_ARM_pc] "=r" (newregs->ARM_pc),
|
|
[_ARM_cpsr] "=r" (newregs->ARM_cpsr),
|
|
[_ARM_sp] "=r" (newregs->ARM_sp),
|
|
[_ARM_lr] "=o" (newregs->ARM_lr)
|
|
: [regs_base] "r" (&newregs->ARM_r0)
|
|
: "memory"
|
|
);
|
|
}
|
|
}
|
|
|
|
/* Function pointer to optional machine-specific reinitialization */
|
|
extern void (*kexec_reinit)(void);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* CONFIG_KEXEC */
|
|
|
|
#endif /* _ARM_KEXEC_H */
|