diff options
Diffstat (limited to 'target/linux/generic/patches-3.3/331-mips-kexec-enhanche-the-support.patch')
| -rw-r--r-- | target/linux/generic/patches-3.3/331-mips-kexec-enhanche-the-support.patch | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/target/linux/generic/patches-3.3/331-mips-kexec-enhanche-the-support.patch b/target/linux/generic/patches-3.3/331-mips-kexec-enhanche-the-support.patch deleted file mode 100644 index 21bbeed..0000000 --- a/target/linux/generic/patches-3.3/331-mips-kexec-enhanche-the-support.patch +++ /dev/null @@ -1,157 +0,0 @@ -From 03cd81fbca6b91317ec1a7b3b3c09fb8d08f83a6 Mon Sep 17 00:00:00 2001 -From: Wu Zhangjin <wuzhangjin@gmail.com> -Date: Tue, 11 Jan 2011 18:42:08 +0000 -Subject: MIPS: Kexec: Enhance the support - -Changes: - o Print more information in machine_kexec() for debugging - E.g. with this information, the kexec_start_address has been found - it was wrong with 64bit kernel / o32 kexec-tools. Which must be - fixed later. - o Link relocate_kernel.S to a section for future extension - This allows more functions can be added for the kexec relocation - part even written in C. to add code into that section, you just need - to mark your function or data with __kexec or - __attribute__((__section__(".__kexec.relocate"))) - -TODO: - -1. Make 64bit kernel / o32|n32|64 kexec-tools works - -Fix the user-space kexec-tools, seems the tool only work for 32bit -machine. So, we need to add 64bit support for it. The address of the -entry point(kexec_start_address) is wrong and make the "kexec -e" fail. -the real entry point must be read from the new kernel image by the -user-space kexec-tools, otherwise, it will not work. The above 64bit -support tested is 64bit kernel with o32 user-space kexec-tools. The root -cause may be the different definition of virt_to_phys() and -phys_to_virt() in the kexec-tools and kernel space for 64bit system / -o32 kernel. - -Ref: http://www.linux-mips.org/archives/linux-mips/2009-08/msg00149.html - -2. Pass the arguments from kexec-tools to the new kernel image - -Please refer to: "MIPS: Loongson: Kexec: Pass parameters to new kernel" - -Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> ---- ---- a/arch/mips/include/asm/kexec.h -+++ b/arch/mips/include/asm/kexec.h -@@ -36,6 +36,16 @@ static inline void crash_setup_regs(stru - } - - #ifdef CONFIG_KEXEC -+ -+#define __kexec __attribute__((__section__(".__kexec.relocate"))) -+ -+/* The linker tells us where the relocate_new_kernel part is. */ -+extern const unsigned char __start___kexec_relocate; -+extern const unsigned char __end___kexec_relocate; -+ -+extern unsigned long kexec_start_address; -+extern unsigned long kexec_indirection_page; -+ - struct kimage; - extern unsigned long kexec_args[4]; - extern int (*_machine_kexec_prepare)(struct kimage *); ---- a/arch/mips/kernel/machine_kexec.c -+++ b/arch/mips/kernel/machine_kexec.c -@@ -14,10 +14,6 @@ - #include <asm/page.h> - - extern const unsigned char relocate_new_kernel[]; --extern const size_t relocate_new_kernel_size; -- --extern unsigned long kexec_start_address; --extern unsigned long kexec_indirection_page; - - int (*_machine_kexec_prepare)(struct kimage *) = NULL; - void (*_machine_kexec_shutdown)(void) = NULL; -@@ -61,21 +57,34 @@ typedef void (*noretfun_t)(void) __attri - void - machine_kexec(struct kimage *image) - { -+ unsigned long kexec_relocate_size; - unsigned long reboot_code_buffer; - unsigned long entry; - unsigned long *ptr; - -+ kexec_relocate_size = (unsigned long)(&__end___kexec_relocate) - -+ (unsigned long)(&__start___kexec_relocate); -+ pr_info("kexec_relocate_size = %lu\n", kexec_relocate_size); -+ - reboot_code_buffer = - (unsigned long)page_address(image->control_code_page); -+ pr_info("reboot_code_buffer = %p\n", (void *)reboot_code_buffer); - - kexec_start_address = - (unsigned long) phys_to_virt(image->start); -+ pr_info("kexec_start_address(entry point of new kernel) = %p\n", -+ (void *)kexec_start_address); - - kexec_indirection_page = - (unsigned long) phys_to_virt(image->head & PAGE_MASK); -+ pr_info("kexec_indirection_page = %p\n", -+ (void *)kexec_indirection_page); - -- memcpy((void*)reboot_code_buffer, relocate_new_kernel, -- relocate_new_kernel_size); -+ memcpy((void *)reboot_code_buffer, &__start___kexec_relocate, -+ kexec_relocate_size); -+ -+ pr_info("Copy kexec_relocate section from %p to reboot_code_buffer: %p\n", -+ &__start___kexec_relocate, (void *)reboot_code_buffer); - - /* - * The generic kexec code builds a page list with physical -@@ -96,8 +105,8 @@ machine_kexec(struct kimage *image) - */ - local_irq_disable(); - -- printk("Will call new kernel at %08lx\n", image->start); -- printk("Bye ...\n"); -+ pr_info("Will call new kernel at %p\n", (void *)kexec_start_address); -+ pr_info("Bye ...\n"); - __flush_cache_all(); - #ifdef CONFIG_SMP - /* All secondary cpus now may jump to kexec_wait cycle */ -@@ -108,4 +117,3 @@ machine_kexec(struct kimage *image) - #endif - ((noretfun_t) reboot_code_buffer)(); - } -- ---- a/arch/mips/kernel/relocate_kernel.S -+++ b/arch/mips/kernel/relocate_kernel.S -@@ -14,6 +14,8 @@ - #include <asm/stackframe.h> - #include <asm/addrspace.h> - -+ .section .kexec.relocate, "ax" -+ - LEAF(relocate_new_kernel) - PTR_L a0, arg0 - PTR_L a1, arg1 -@@ -155,9 +157,3 @@ EXPORT(kexec_start_address) - EXPORT(kexec_indirection_page) - PTR 0 - .size kexec_indirection_page, PTRSIZE -- --relocate_new_kernel_end: -- --EXPORT(relocate_new_kernel_size) -- PTR relocate_new_kernel_end - relocate_new_kernel -- .size relocate_new_kernel_size, PTRSIZE ---- a/arch/mips/kernel/vmlinux.lds.S -+++ b/arch/mips/kernel/vmlinux.lds.S -@@ -50,6 +50,10 @@ SECTIONS - *(.text.*) - *(.fixup) - *(.gnu.warning) -+ __start___kexec_relocate = .; -+ KEEP(*(.kexec.relocate)) -+ KEEP(*(.__kexec.relocate)) -+ __end___kexec_relocate = .; - } :text = 0 - _etext = .; /* End of text section */ - |