some kexec MIPS improvements

-  using simple   mips* ) in configure.ac to make it compilable on mips2
   and mips64
- remove kexec/arch/mips/mips-setup-simple.S which prepares cmdline for
  new kernel, it is better to move this work to kernel code. BTW this code was
  compilable only on o32 because of t4 is not defined on 64-64 or n32 MIPS ABIs.
- simple put cmdline as string, kernel code should catch cmdline like this

int board_kexec_prepare(struct kimage *image)
{
    int i;
    char *bootloader = "kexec";
    board_boot_desc_ptr->argc = 0;
    for(i=0;i<image->nr_segments;i++)
    {
        printk("segment %d
        if (!strncmp(bootloader, (char*)image->segment[i].buf,
                strlen(bootloader)))
        {
            /*
             * convert command line string to array
             * of parameters (as bootloader does).
             */
            int argc = 0, offt;
            char *str = (char *)image->segment[i].buf;
            char *ptr = strchr(str, ' ');
            while (ptr && (ARGV_MAX_ARGS > argc)) {
                *ptr = '\0';
                if (ptr[1] != ' ') {
                    offt = (int)(ptr - str + 1);
                    boot_desc_ptr->argv[argc] =
                        image->segment[i].mem + offt;
                    argc++;
                }
                ptr = strchr(ptr + 1, ' ');
            }
            boot_desc_ptr->argc = argc;
            break;
        }
    }
   Keep it as string make code simple and more readable.

- add crashdump support
- do not redefine syscalls numbers if they defined in system
  remove fixups for /proc/iomem. If your board provides wrong /proc/iomem please
  fix kernel, or at least you local version of kexec. No need to support it in
  main line. At least add option --fake-iomem
- some minor fixes

Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 27 insertions, 0 deletions

diff --git a/kexec/arch/mips/crashdump-mips.h b/kexec/arch/mips/crashdump-mips.h
new file mode 100644
index 0000000..c986835
--- /dev/null
+++ b/kexec/arch/mips/crashdump-mips.h
@@ -0,0 +1,27 @@
+#ifndef CRASHDUMP_MIPS_H
+#define CRASHDUMP_MIPS_H
+
+struct kexec_info;
+int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline,
+				unsigned long max_addr, unsigned long min_base);
+#ifdef __mips64
+#define PAGE_OFFSET	0xa800000000000000ULL
+#else
+#define PAGE_OFFSET	0x80000000
+#endif
+#define __pa(x)		((unsigned long)(X) & 0x7fffffff)
+
+#define MAXMEM		0x80000000
+
+#define CRASH_MAX_MEMMAP_NR	(KEXEC_MAX_SEGMENTS + 1)
+#define CRASH_MAX_MEMORY_RANGES	(MAX_MEMORY_RANGES + 2)
+
+#define COMMAND_LINE_SIZE	512
+
+/* Backup Region, First 1M of System RAM. */
+#define BACKUP_SRC_START	0x00000000
+#define BACKUP_SRC_END		0x000fffff
+#define BACKUP_SRC_SIZE	(BACKUP_SRC_END - BACKUP_SRC_START + 1)
+
+extern struct arch_options_t arch_options;
+#endif /* CRASHDUMP_MIPS_H */