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, 2 insertions, 0 deletions

diff --git a/kexec/kexec-syscall.h b/kexec/kexec-syscall.h
index 69c9686..7f41a1b 100644
--- a/kexec/kexec-syscall.h
+++ b/kexec/kexec-syscall.h
@@ -22,6 +22,7 @@
 #define LINUX_REBOOT_CMD_KEXEC_OLD2	0x18263645
 #define LINUX_REBOOT_CMD_KEXEC		0x45584543
 
+#ifndef __NR_kexec_load
 #ifdef __i386__
 #define __NR_kexec_load		283
 #endif
@@ -60,6 +61,7 @@
 #ifndef __NR_kexec_load
 #error Unknown processor architecture.  Needs a kexec_load syscall number.
 #endif
+#endif /*ifndef __NR_kexec_load*/
 
 struct kexec_segment;