mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 06:25:20 +02:00
617 lines
16 KiB
Diff
617 lines
16 KiB
Diff
|
From eee16330c9de9adf7880cce9f1d32e13f89706bb Mon Sep 17 00:00:00 2001
|
||
|
From: Wu Zhangjin <wuzhangjin@gmail.com>
|
||
|
Date: Tue, 11 Jan 2011 13:16:47 +0000
|
||
|
Subject: MIPS: Add crash and kdump support
|
||
|
|
||
|
From: http://patchwork.linux-mips.org/patch/1025/
|
||
|
|
||
|
Hello folks,
|
||
|
|
||
|
Please find here MIPS crash and kdump patches.
|
||
|
This is patch set of 3 patches:
|
||
|
1. generic MIPS changes (kernel);
|
||
|
2. MIPS Cavium Octeon board kexec/kdump code (kernel);
|
||
|
3. Kexec user space MIPS changes.
|
||
|
|
||
|
Patches were tested on the latest linux-mips@ git kernel and the latest
|
||
|
kexec-tools git on Cavium Octeon 50xx board.
|
||
|
|
||
|
I also made the same code working on RMI XLR/XLS boards for both
|
||
|
mips32 and mips64 kernels.
|
||
|
|
||
|
Best regards,
|
||
|
Maxim Uvarov.
|
||
|
|
||
|
------
|
||
|
[ Zhangjin: Several trivial building failure has been fixed.
|
||
|
|
||
|
Note: the 2nd patch can not be cleanly applied, but may be a good
|
||
|
reference for the other board development:
|
||
|
|
||
|
+ MIPS Cavium Octeon board kexec,kdump support
|
||
|
http://patchwork.linux-mips.org/patch/1026/
|
||
|
|
||
|
And the 3rd patch has already been merged into the mainline kexec-tools:
|
||
|
|
||
|
+ some kexec MIPS improvements
|
||
|
http://patchwork.linux-mips.org/patch/1027/
|
||
|
|
||
|
kexec-tools is available here:
|
||
|
|
||
|
+ http://horms.net/projects/kexec/
|
||
|
git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git
|
||
|
]
|
||
|
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
|
||
|
---
|
||
|
(limited to 'arch/mips/kernel')
|
||
|
|
||
|
--- a/arch/mips/kernel/Makefile
|
||
|
+++ b/arch/mips/kernel/Makefile
|
||
|
@@ -97,7 +97,8 @@ obj-$(CONFIG_I8253) += i8253.o
|
||
|
|
||
|
obj-$(CONFIG_GPIO_TXX9) += gpio_txx9.o
|
||
|
|
||
|
-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
|
||
|
+obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o crash.o
|
||
|
+obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
|
||
|
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
|
||
|
obj-$(CONFIG_SPINLOCK_TEST) += spinlock_test.o
|
||
|
obj-$(CONFIG_MIPS_MACHINE) += mips_machine.o
|
||
|
--- /dev/null
|
||
|
+++ b/arch/mips/kernel/crash.c
|
||
|
@@ -0,0 +1,75 @@
|
||
|
+#include <linux/kernel.h>
|
||
|
+#include <linux/smp.h>
|
||
|
+#include <linux/reboot.h>
|
||
|
+#include <linux/kexec.h>
|
||
|
+#include <linux/bootmem.h>
|
||
|
+#include <linux/crash_dump.h>
|
||
|
+#include <linux/delay.h>
|
||
|
+#include <linux/init.h>
|
||
|
+#include <linux/irq.h>
|
||
|
+#include <linux/types.h>
|
||
|
+#include <linux/sched.h>
|
||
|
+
|
||
|
+#ifdef CONFIG_CRASH_DUMP
|
||
|
+unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
|
||
|
+#endif
|
||
|
+
|
||
|
+/* This keeps a track of which one is crashing cpu. */
|
||
|
+int crashing_cpu = -1;
|
||
|
+static cpumask_t cpus_in_crash = CPU_MASK_NONE;
|
||
|
+
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+void crash_shutdown_secondary(void *ignore)
|
||
|
+{
|
||
|
+ struct pt_regs *regs;
|
||
|
+ int cpu = smp_processor_id();
|
||
|
+
|
||
|
+ regs = task_pt_regs(current);
|
||
|
+
|
||
|
+ if (!cpu_online(cpu))
|
||
|
+ return;
|
||
|
+
|
||
|
+ local_irq_disable();
|
||
|
+ if (!cpu_isset(cpu, cpus_in_crash))
|
||
|
+ crash_save_cpu(regs, cpu);
|
||
|
+ cpu_set(cpu, cpus_in_crash);
|
||
|
+
|
||
|
+ while (!atomic_read(&kexec_ready_to_reboot))
|
||
|
+ cpu_relax();
|
||
|
+ relocated_kexec_smp_wait(NULL);
|
||
|
+ /* NOTREACHED */
|
||
|
+}
|
||
|
+
|
||
|
+static void crash_kexec_prepare_cpus(void)
|
||
|
+{
|
||
|
+ unsigned int msecs;
|
||
|
+
|
||
|
+ unsigned int ncpus = num_online_cpus() - 1;/* Excluding the panic cpu */
|
||
|
+
|
||
|
+ dump_send_ipi(crash_shutdown_secondary);
|
||
|
+ smp_wmb();
|
||
|
+
|
||
|
+ /*
|
||
|
+ * The crash CPU sends an IPI and wait for other CPUs to
|
||
|
+ * respond. Delay of at least 10 seconds.
|
||
|
+ */
|
||
|
+ printk(KERN_EMERG "Sending IPI to other cpus...\n");
|
||
|
+ msecs = 10000;
|
||
|
+ while ((cpus_weight(cpus_in_crash) < ncpus) && (--msecs > 0)) {
|
||
|
+ cpu_relax();
|
||
|
+ mdelay(1);
|
||
|
+ }
|
||
|
+}
|
||
|
+
|
||
|
+#else
|
||
|
+static void crash_kexec_prepare_cpus(void) {}
|
||
|
+#endif
|
||
|
+
|
||
|
+void default_machine_crash_shutdown(struct pt_regs *regs)
|
||
|
+{
|
||
|
+ local_irq_disable();
|
||
|
+ crashing_cpu = smp_processor_id();
|
||
|
+ crash_save_cpu(regs, crashing_cpu);
|
||
|
+ crash_kexec_prepare_cpus();
|
||
|
+ cpu_set(crashing_cpu, cpus_in_crash);
|
||
|
+}
|
||
|
--- /dev/null
|
||
|
+++ b/arch/mips/kernel/crash_dump.c
|
||
|
@@ -0,0 +1,86 @@
|
||
|
+#include <linux/highmem.h>
|
||
|
+#include <linux/bootmem.h>
|
||
|
+#include <linux/crash_dump.h>
|
||
|
+#include <asm/uaccess.h>
|
||
|
+
|
||
|
+#ifdef CONFIG_PROC_VMCORE
|
||
|
+static int __init parse_elfcorehdr(char *p)
|
||
|
+{
|
||
|
+ if (p)
|
||
|
+ elfcorehdr_addr = memparse(p, &p);
|
||
|
+ return 1;
|
||
|
+}
|
||
|
+__setup("elfcorehdr=", parse_elfcorehdr);
|
||
|
+#endif
|
||
|
+
|
||
|
+static int __init parse_savemaxmem(char *p)
|
||
|
+{
|
||
|
+ if (p)
|
||
|
+ saved_max_pfn = (memparse(p, &p) >> PAGE_SHIFT) - 1;
|
||
|
+
|
||
|
+ return 1;
|
||
|
+}
|
||
|
+__setup("savemaxmem=", parse_savemaxmem);
|
||
|
+
|
||
|
+
|
||
|
+static void *kdump_buf_page;
|
||
|
+
|
||
|
+/**
|
||
|
+ * copy_oldmem_page - copy one page from "oldmem"
|
||
|
+ * @pfn: page frame number to be copied
|
||
|
+ * @buf: target memory address for the copy; this can be in kernel address
|
||
|
+ * space or user address space (see @userbuf)
|
||
|
+ * @csize: number of bytes to copy
|
||
|
+ * @offset: offset in bytes into the page (based on pfn) to begin the copy
|
||
|
+ * @userbuf: if set, @buf is in user address space, use copy_to_user(),
|
||
|
+ * otherwise @buf is in kernel address space, use memcpy().
|
||
|
+ *
|
||
|
+ * Copy a page from "oldmem". For this page, there is no pte mapped
|
||
|
+ * in the current kernel.
|
||
|
+ *
|
||
|
+ * Calling copy_to_user() in atomic context is not desirable. Hence first
|
||
|
+ * copying the data to a pre-allocated kernel page and then copying to user
|
||
|
+ * space in non-atomic context.
|
||
|
+ */
|
||
|
+ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
|
||
|
+ size_t csize, unsigned long offset, int userbuf)
|
||
|
+{
|
||
|
+ void *vaddr;
|
||
|
+
|
||
|
+ if (!csize)
|
||
|
+ return 0;
|
||
|
+
|
||
|
+ vaddr = kmap_atomic_pfn(pfn, KM_PTE0);
|
||
|
+
|
||
|
+ if (!userbuf) {
|
||
|
+ memcpy(buf, (vaddr + offset), csize);
|
||
|
+ kunmap_atomic(vaddr, KM_PTE0);
|
||
|
+ } else {
|
||
|
+ if (!kdump_buf_page) {
|
||
|
+ printk(KERN_WARNING "Kdump: Kdump buffer page not"
|
||
|
+ " allocated\n");
|
||
|
+ return -EFAULT;
|
||
|
+ }
|
||
|
+ copy_page(kdump_buf_page, vaddr);
|
||
|
+ kunmap_atomic(vaddr, KM_PTE0);
|
||
|
+ if (copy_to_user(buf, (kdump_buf_page + offset), csize))
|
||
|
+ return -EFAULT;
|
||
|
+ }
|
||
|
+
|
||
|
+ return csize;
|
||
|
+}
|
||
|
+
|
||
|
+static int __init kdump_buf_page_init(void)
|
||
|
+{
|
||
|
+ int ret = 0;
|
||
|
+
|
||
|
+ kdump_buf_page = kmalloc(PAGE_SIZE, GFP_KERNEL);
|
||
|
+ if (!kdump_buf_page) {
|
||
|
+ printk(KERN_WARNING "Kdump: Failed to allocate kdump buffer"
|
||
|
+ " page\n");
|
||
|
+ ret = -ENOMEM;
|
||
|
+ }
|
||
|
+
|
||
|
+ return ret;
|
||
|
+}
|
||
|
+arch_initcall(kdump_buf_page_init);
|
||
|
--- a/arch/mips/kernel/machine_kexec.c
|
||
|
+++ b/arch/mips/kernel/machine_kexec.c
|
||
|
@@ -19,9 +19,19 @@ extern const size_t relocate_new_kernel_
|
||
|
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;
|
||
|
+void (*_machine_crash_shutdown)(struct pt_regs *regs) = NULL;
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+void (*relocated_kexec_smp_wait) (void *);
|
||
|
+atomic_t kexec_ready_to_reboot = ATOMIC_INIT(0);
|
||
|
+#endif
|
||
|
+
|
||
|
int
|
||
|
machine_kexec_prepare(struct kimage *kimage)
|
||
|
{
|
||
|
+ if (_machine_kexec_prepare)
|
||
|
+ return _machine_kexec_prepare(kimage);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
@@ -33,11 +43,17 @@ machine_kexec_cleanup(struct kimage *kim
|
||
|
void
|
||
|
machine_shutdown(void)
|
||
|
{
|
||
|
+ if (_machine_kexec_shutdown)
|
||
|
+ _machine_kexec_shutdown();
|
||
|
}
|
||
|
|
||
|
void
|
||
|
machine_crash_shutdown(struct pt_regs *regs)
|
||
|
{
|
||
|
+ if (_machine_crash_shutdown)
|
||
|
+ _machine_crash_shutdown(regs);
|
||
|
+ else
|
||
|
+ default_machine_crash_shutdown(regs);
|
||
|
}
|
||
|
|
||
|
typedef void (*noretfun_t)(void) __attribute__((noreturn));
|
||
|
@@ -52,7 +68,9 @@ machine_kexec(struct kimage *image)
|
||
|
reboot_code_buffer =
|
||
|
(unsigned long)page_address(image->control_code_page);
|
||
|
|
||
|
- kexec_start_address = (unsigned long) phys_to_virt(image->start);
|
||
|
+ kexec_start_address =
|
||
|
+ (unsigned long) phys_to_virt(image->start);
|
||
|
+
|
||
|
kexec_indirection_page =
|
||
|
(unsigned long) phys_to_virt(image->head & PAGE_MASK);
|
||
|
|
||
|
@@ -63,7 +81,7 @@ machine_kexec(struct kimage *image)
|
||
|
* The generic kexec code builds a page list with physical
|
||
|
* addresses. they are directly accessible through KSEG0 (or
|
||
|
* CKSEG0 or XPHYS if on 64bit system), hence the
|
||
|
- * pys_to_virt() call.
|
||
|
+ * phys_to_virt() call.
|
||
|
*/
|
||
|
for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE);
|
||
|
ptr = (entry & IND_INDIRECTION) ?
|
||
|
@@ -81,5 +99,13 @@ machine_kexec(struct kimage *image)
|
||
|
printk("Will call new kernel at %08lx\n", image->start);
|
||
|
printk("Bye ...\n");
|
||
|
__flush_cache_all();
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+ /* All secondary cpus now may jump to kexec_wait cycle */
|
||
|
+ relocated_kexec_smp_wait = reboot_code_buffer +
|
||
|
+ (void *)(kexec_smp_wait - relocate_new_kernel);
|
||
|
+ smp_wmb();
|
||
|
+ atomic_set(&kexec_ready_to_reboot, 1);
|
||
|
+#endif
|
||
|
((noretfun_t) reboot_code_buffer)();
|
||
|
}
|
||
|
+
|
||
|
--- a/arch/mips/kernel/relocate_kernel.S
|
||
|
+++ b/arch/mips/kernel/relocate_kernel.S
|
||
|
@@ -15,6 +15,11 @@
|
||
|
#include <asm/addrspace.h>
|
||
|
|
||
|
LEAF(relocate_new_kernel)
|
||
|
+ PTR_L a0, arg0
|
||
|
+ PTR_L a1, arg1
|
||
|
+ PTR_L a2, arg2
|
||
|
+ PTR_L a3, arg3
|
||
|
+
|
||
|
PTR_L s0, kexec_indirection_page
|
||
|
PTR_L s1, kexec_start_address
|
||
|
|
||
|
@@ -26,7 +31,6 @@ process_entry:
|
||
|
and s3, s2, 0x1
|
||
|
beq s3, zero, 1f
|
||
|
and s4, s2, ~0x1 /* store destination addr in s4 */
|
||
|
- move a0, s4
|
||
|
b process_entry
|
||
|
|
||
|
1:
|
||
|
@@ -60,23 +64,100 @@ copy_word:
|
||
|
b process_entry
|
||
|
|
||
|
done:
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+ /* kexec_flag reset is signal to other CPUs what kernel
|
||
|
+ was moved to it's location. Note - we need relocated address
|
||
|
+ of kexec_flag. */
|
||
|
+
|
||
|
+ bal 1f
|
||
|
+ 1: move t1,ra;
|
||
|
+ PTR_LA t2,1b
|
||
|
+ PTR_LA t0,kexec_flag
|
||
|
+ PTR_SUB t0,t0,t2;
|
||
|
+ PTR_ADD t0,t1,t0;
|
||
|
+ LONG_S zero,(t0)
|
||
|
+#endif
|
||
|
+
|
||
|
+ sync
|
||
|
/* jump to kexec_start_address */
|
||
|
j s1
|
||
|
END(relocate_new_kernel)
|
||
|
|
||
|
-kexec_start_address:
|
||
|
- EXPORT(kexec_start_address)
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+/*
|
||
|
+ * Other CPUs should wait until code is relocated and
|
||
|
+ * then start at entry (?) point.
|
||
|
+ */
|
||
|
+LEAF(kexec_smp_wait)
|
||
|
+ PTR_L a0, s_arg0
|
||
|
+ PTR_L a1, s_arg1
|
||
|
+ PTR_L a2, s_arg2
|
||
|
+ PTR_L a3, s_arg3
|
||
|
+ PTR_L s1, kexec_start_address
|
||
|
+
|
||
|
+ /* Non-relocated address works for args and kexec_start_address ( old
|
||
|
+ * kernel is not overwritten). But we need relocated address of
|
||
|
+ * kexec_flag.
|
||
|
+ */
|
||
|
+
|
||
|
+ bal 1f
|
||
|
+1: move t1,ra;
|
||
|
+ PTR_LA t2,1b
|
||
|
+ PTR_LA t0,kexec_flag
|
||
|
+ PTR_SUB t0,t0,t2;
|
||
|
+ PTR_ADD t0,t1,t0;
|
||
|
+
|
||
|
+1: LONG_L s0, (t0)
|
||
|
+ bne s0, zero,1b
|
||
|
+
|
||
|
+ sync
|
||
|
+ j s1
|
||
|
+ END(kexec_smp_wait)
|
||
|
+#endif
|
||
|
+
|
||
|
+#ifdef __mips64
|
||
|
+ /* all PTR's must be aligned to 8 byte in 64-bit mode */
|
||
|
+ .align 3
|
||
|
+#endif
|
||
|
+
|
||
|
+/* All parameters to new kernel are passed in registers a0-a3.
|
||
|
+ * kexec_args[0..3] are uses to prepare register values.
|
||
|
+ */
|
||
|
+
|
||
|
+EXPORT(kexec_args)
|
||
|
+arg0: PTR 0x0
|
||
|
+arg1: PTR 0x0
|
||
|
+arg2: PTR 0x0
|
||
|
+arg3: PTR 0x0
|
||
|
+ .size kexec_args,PTRSIZE*4
|
||
|
+
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+/*
|
||
|
+ * Secondary CPUs may have different kernel parameters in
|
||
|
+ * their registers a0-a3. secondary_kexec_args[0..3] are used
|
||
|
+ * to prepare register values.
|
||
|
+ */
|
||
|
+EXPORT(secondary_kexec_args)
|
||
|
+s_arg0: PTR 0x0
|
||
|
+s_arg1: PTR 0x0
|
||
|
+s_arg2: PTR 0x0
|
||
|
+s_arg3: PTR 0x0
|
||
|
+ .size secondary_kexec_args,PTRSIZE*4
|
||
|
+kexec_flag:
|
||
|
+ LONG 0x1
|
||
|
+
|
||
|
+#endif
|
||
|
+
|
||
|
+EXPORT(kexec_start_address)
|
||
|
PTR 0x0
|
||
|
.size kexec_start_address, PTRSIZE
|
||
|
|
||
|
-kexec_indirection_page:
|
||
|
- EXPORT(kexec_indirection_page)
|
||
|
+EXPORT(kexec_indirection_page)
|
||
|
PTR 0
|
||
|
.size kexec_indirection_page, PTRSIZE
|
||
|
|
||
|
relocate_new_kernel_end:
|
||
|
|
||
|
-relocate_new_kernel_size:
|
||
|
- EXPORT(relocate_new_kernel_size)
|
||
|
+EXPORT(relocate_new_kernel_size)
|
||
|
PTR relocate_new_kernel_end - relocate_new_kernel
|
||
|
.size relocate_new_kernel_size, PTRSIZE
|
||
|
--- a/arch/mips/kernel/setup.c
|
||
|
+++ b/arch/mips/kernel/setup.c
|
||
|
@@ -22,6 +22,7 @@
|
||
|
#include <linux/console.h>
|
||
|
#include <linux/pfn.h>
|
||
|
#include <linux/debugfs.h>
|
||
|
+#include <linux/kexec.h>
|
||
|
|
||
|
#include <asm/addrspace.h>
|
||
|
#include <asm/bootinfo.h>
|
||
|
@@ -523,12 +524,62 @@ static void __init arch_mem_init(char **
|
||
|
}
|
||
|
|
||
|
bootmem_init();
|
||
|
+#ifdef CONFIG_KEXEC
|
||
|
+ if (crashk_res.start != crashk_res.end)
|
||
|
+ reserve_bootmem(crashk_res.start,
|
||
|
+ crashk_res.end - crashk_res.start + 1,
|
||
|
+ BOOTMEM_DEFAULT);
|
||
|
+#endif
|
||
|
device_tree_init();
|
||
|
sparse_init();
|
||
|
plat_swiotlb_setup();
|
||
|
paging_init();
|
||
|
}
|
||
|
|
||
|
+#ifdef CONFIG_KEXEC
|
||
|
+static inline unsigned long long get_total_mem(void)
|
||
|
+{
|
||
|
+ unsigned long long total;
|
||
|
+ total = max_pfn - min_low_pfn;
|
||
|
+ return total << PAGE_SHIFT;
|
||
|
+}
|
||
|
+
|
||
|
+static void __init mips_parse_crashkernel(void)
|
||
|
+{
|
||
|
+ unsigned long long total_mem;
|
||
|
+ unsigned long long crash_size, crash_base;
|
||
|
+ int ret;
|
||
|
+
|
||
|
+ total_mem = get_total_mem();
|
||
|
+ ret = parse_crashkernel(boot_command_line, total_mem,
|
||
|
+ &crash_size, &crash_base);
|
||
|
+ if (ret != 0 || crash_size <= 0)
|
||
|
+ return;
|
||
|
+
|
||
|
+ crashk_res.start = crash_base;
|
||
|
+ crashk_res.end = crash_base + crash_size - 1;
|
||
|
+}
|
||
|
+static void __init request_crashkernel(struct resource *res)
|
||
|
+{
|
||
|
+ int ret;
|
||
|
+
|
||
|
+ ret = request_resource(res, &crashk_res);
|
||
|
+ if (!ret)
|
||
|
+ printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
|
||
|
+ "for crashkernel\n",
|
||
|
+ (unsigned long)((crashk_res.end -
|
||
|
+ crashk_res.start + 1) >> 20),
|
||
|
+ (unsigned long)(crashk_res.start >> 20));
|
||
|
+}
|
||
|
+#else
|
||
|
+static void __init mips_parse_crashkernel(void)
|
||
|
+{
|
||
|
+}
|
||
|
+static void __init request_crashkernel(struct resource *res)
|
||
|
+{
|
||
|
+}
|
||
|
+#endif
|
||
|
+
|
||
|
static void __init resource_init(void)
|
||
|
{
|
||
|
int i;
|
||
|
@@ -544,6 +595,8 @@ static void __init resource_init(void)
|
||
|
/*
|
||
|
* Request address space for all standard RAM.
|
||
|
*/
|
||
|
+ mips_parse_crashkernel();
|
||
|
+
|
||
|
for (i = 0; i < boot_mem_map.nr_map; i++) {
|
||
|
struct resource *res;
|
||
|
unsigned long start, end;
|
||
|
@@ -580,6 +633,7 @@ static void __init resource_init(void)
|
||
|
*/
|
||
|
request_resource(res, &code_resource);
|
||
|
request_resource(res, &data_resource);
|
||
|
+ request_crashkernel(res);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
--- a/arch/mips/kernel/smp.c
|
||
|
+++ b/arch/mips/kernel/smp.c
|
||
|
@@ -433,3 +433,21 @@ void flush_tlb_one(unsigned long vaddr)
|
||
|
|
||
|
EXPORT_SYMBOL(flush_tlb_page);
|
||
|
EXPORT_SYMBOL(flush_tlb_one);
|
||
|
+
|
||
|
+#if defined(CONFIG_KEXEC)
|
||
|
+void (*dump_ipi_function_ptr)(void *) = NULL;
|
||
|
+void dump_send_ipi(void (*dump_ipi_callback)(void *))
|
||
|
+{
|
||
|
+ int i;
|
||
|
+ int cpu = smp_processor_id();
|
||
|
+
|
||
|
+ dump_ipi_function_ptr = dump_ipi_callback;
|
||
|
+ smp_mb();
|
||
|
+ for_each_online_cpu(i)
|
||
|
+ if (i != cpu)
|
||
|
+ core_send_ipi(i, SMP_DUMP);
|
||
|
+
|
||
|
+}
|
||
|
+EXPORT_SYMBOL(dump_send_ipi);
|
||
|
+#endif
|
||
|
+
|
||
|
--- a/arch/mips/include/asm/kexec.h
|
||
|
+++ b/arch/mips/include/asm/kexec.h
|
||
|
@@ -9,22 +9,45 @@
|
||
|
#ifndef _MIPS_KEXEC
|
||
|
# define _MIPS_KEXEC
|
||
|
|
||
|
+#include <asm/stacktrace.h>
|
||
|
+
|
||
|
+extern unsigned long long elfcorehdr_addr;
|
||
|
+
|
||
|
/* Maximum physical address we can use pages from */
|
||
|
#define KEXEC_SOURCE_MEMORY_LIMIT (0x20000000)
|
||
|
/* Maximum address we can reach in physical address mode */
|
||
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (0x20000000)
|
||
|
/* Maximum address we can use for the control code buffer */
|
||
|
#define KEXEC_CONTROL_MEMORY_LIMIT (0x20000000)
|
||
|
-
|
||
|
-#define KEXEC_CONTROL_PAGE_SIZE 4096
|
||
|
+/* Reserve 3*4096 bytes for board-specific info */
|
||
|
+#define KEXEC_CONTROL_PAGE_SIZE (4096 + 3*4096)
|
||
|
|
||
|
/* The native architecture */
|
||
|
#define KEXEC_ARCH KEXEC_ARCH_MIPS
|
||
|
+#define MAX_NOTE_BYTES 1024
|
||
|
|
||
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
||
|
- struct pt_regs *oldregs)
|
||
|
+ struct pt_regs *oldregs)
|
||
|
{
|
||
|
- /* Dummy implementation for now */
|
||
|
+ if (oldregs)
|
||
|
+ memcpy(newregs, oldregs, sizeof(*newregs));
|
||
|
+ else
|
||
|
+ prepare_frametrace(newregs);
|
||
|
}
|
||
|
|
||
|
+#ifdef CONFIG_KEXEC
|
||
|
+struct kimage;
|
||
|
+extern unsigned long kexec_args[4];
|
||
|
+extern int (*_machine_kexec_prepare)(struct kimage *);
|
||
|
+extern void (*_machine_kexec_shutdown)(void);
|
||
|
+extern void (*_machine_crash_shutdown)(struct pt_regs *regs);
|
||
|
+extern void default_machine_crash_shutdown(struct pt_regs *regs);
|
||
|
+#ifdef CONFIG_SMP
|
||
|
+extern const unsigned char kexec_smp_wait[];
|
||
|
+extern unsigned long secondary_kexec_args[4];
|
||
|
+extern void (*relocated_kexec_smp_wait) (void *);
|
||
|
+extern atomic_t kexec_ready_to_reboot;
|
||
|
+#endif
|
||
|
+#endif
|
||
|
+
|
||
|
#endif /* !_MIPS_KEXEC */
|
||
|
--- a/arch/mips/include/asm/smp.h
|
||
|
+++ b/arch/mips/include/asm/smp.h
|
||
|
@@ -40,6 +40,8 @@ extern int __cpu_logical_map[NR_CPUS];
|
||
|
#define SMP_CALL_FUNCTION 0x2
|
||
|
/* Octeon - Tell another core to flush its icache */
|
||
|
#define SMP_ICACHE_FLUSH 0x4
|
||
|
+/* Used by kexec crashdump to save all cpu's state */
|
||
|
+#define SMP_DUMP 0x8
|
||
|
|
||
|
extern volatile cpumask_t cpu_callin_map;
|
||
|
|
||
|
@@ -91,4 +93,9 @@ static inline void arch_send_call_functi
|
||
|
mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
|
||
|
}
|
||
|
|
||
|
+extern void core_send_ipi(int cpu, unsigned int action);
|
||
|
+#if defined(CONFIG_KEXEC)
|
||
|
+extern void (*dump_ipi_function_ptr)(void *);
|
||
|
+void dump_send_ipi(void (*dump_ipi_callback)(void *));
|
||
|
+#endif
|
||
|
#endif /* __ASM_SMP_H */
|