diff options
author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-10-29 12:13:58 +0000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-11-21 15:41:34 +1100 |
commit | 793b08e2efff3ec020c5c5861d00ed394fcdd488 (patch) | |
tree | 0a0ccae4f55def043a319f6b1654d558d0254a53 /arch/powerpc/kexec/core_32.c | |
parent | 9f7bd9201521b3ad11e96887550dd3e835ba01cb (diff) |
powerpc/kexec: Move kexec files into a dedicated subdir.
arch/powerpc/kernel/ contains 8 files dedicated to kexec.
Move them into a dedicated subdirectory.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Move to a/p/kexec, drop the 'machine' naming and use 'core' instead]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/afbef97ec6a978574a5cf91a4441000e0a9da42a.1572351221.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kexec/core_32.c')
-rw-r--r-- | arch/powerpc/kexec/core_32.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/powerpc/kexec/core_32.c b/arch/powerpc/kexec/core_32.c new file mode 100644 index 000000000000..bf9f1f906d64 --- /dev/null +++ b/arch/powerpc/kexec/core_32.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PPC32 code to handle Linux booting another kernel. + * + * Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com> + * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz + * Copyright (C) 2005 IBM Corporation. + */ + +#include <linux/kexec.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <asm/cacheflush.h> +#include <asm/hw_irq.h> +#include <asm/io.h> + +typedef void (*relocate_new_kernel_t)( + unsigned long indirection_page, + unsigned long reboot_code_buffer, + unsigned long start_address) __noreturn; + +/* + * This is a generic machine_kexec function suitable at least for + * non-OpenFirmware embedded platforms. + * It merely copies the image relocation code to the control page and + * jumps to it. + * A platform specific function may just call this one. + */ +void default_machine_kexec(struct kimage *image) +{ + extern const unsigned int relocate_new_kernel_size; + unsigned long page_list; + unsigned long reboot_code_buffer, reboot_code_buffer_phys; + relocate_new_kernel_t rnk; + + /* Interrupts aren't acceptable while we reboot */ + local_irq_disable(); + + /* mask each interrupt so we are in a more sane state for the + * kexec kernel */ + machine_kexec_mask_interrupts(); + + page_list = image->head; + + /* we need both effective and real address here */ + reboot_code_buffer = + (unsigned long)page_address(image->control_code_page); + reboot_code_buffer_phys = virt_to_phys((void *)reboot_code_buffer); + + /* copy our kernel relocation code to the control code page */ + memcpy((void *)reboot_code_buffer, relocate_new_kernel, + relocate_new_kernel_size); + + flush_icache_range(reboot_code_buffer, + reboot_code_buffer + KEXEC_CONTROL_PAGE_SIZE); + printk(KERN_INFO "Bye!\n"); + + if (!IS_ENABLED(CONFIG_FSL_BOOKE) && !IS_ENABLED(CONFIG_44x)) + relocate_new_kernel(page_list, reboot_code_buffer_phys, image->start); + + /* now call it */ + rnk = (relocate_new_kernel_t) reboot_code_buffer; + (*rnk)(page_list, reboot_code_buffer_phys, image->start); +} + +int default_machine_kexec_prepare(struct kimage *image) +{ + return 0; +} |